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Improving root–soil adaptability by modifying root system architecture in rice 认领 引用
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作者 Junxiang Zhang Yali Xiong Guoqiang Huang 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2026年第6期1012-1022,共11页
Plant root systems serve essential roles in soil anchorage, water uptake, and nutrient acquisition. Root system architecture (RSA) refers to the spatial arrangement of the root system in the soil, reflecting the geome... Plant root systems serve essential roles in soil anchorage, water uptake, and nutrient acquisition. Root system architecture (RSA) refers to the spatial arrangement of the root system in the soil, reflecting the geometric arrangement of root axes and the structure, morphology, and anatomy of root branches. Rice (Oryza sativa) is a key cereal crop with a hierarchically organized root system that consists of embryonically derived primary roots and postembryonic crown roots, together with their associated lateral roots and root hairs, each of which exhibits specialized structural modifications. This review systematically examines key architectural components of the rice root system;the stress-responsive RSA traits that contribute to abiotic stress resilience and/or tolerance;and precise strategic approaches for the development of optimized root ideotypes through integrated phenotyping and genomic technologies. 展开更多
关键词 Rice Root system architecture Soil Root-soil interactions Ideal root system
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Establishment of an in vivo transgenic hairy root system in strawberry for verifying the nitrate-transport activity of FaNRT1.1 认领 引用 被引量：2
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作者 Fuling Hao Sixin Wu +5 位作者 Zhongyuan Shen Maoting Tang Xiangjun Ge Muqian Wu Qihan Sun Congbing Fang 《Horticultural Plant Journal》 SCIE CAS CSCD 2026年第7期1641-1651,共11页
The study of strawberry gene function has been hindered by the low transformation efficiency and long generation time of transgenic plants.This study aimed to develop and optimize methods for generating strawberry(Fra... The study of strawberry gene function has been hindered by the low transformation efficiency and long generation time of transgenic plants.This study aimed to develop and optimize methods for generating strawberry(Fragaria×ananassa Duch.‘Benihoppe’)plants with transgenic hairy roots.This involved inducing hairy roots on strawberry stolons near new plants,optimizing several parameters that affect the survival rate of stolon hairy roots,and using the new hairy root transgenic system to investigate the nitrate-transport function of FaNRT1.1.In vivo injection(IVI)of Agrobacterium rhizogenes K599(OD600=1.0)at sites measuring 0.5–1 cm on the tops of mature stolons(9–12 days old)of‘Benihoppe’strawberry resulted in the establishment of strawberries with transgenic hairy roots.The IVI induced epidermal bulges and hairy roots in 50%of the stolons.The epidermal bulges were evident,and callus began to grow 35 days post-injection,while hairy roots began to develop near the injection sites at 40 days and became abundant by 60 days.Specific fluorescence signals were observed in all transgenic hairy roots of 40 new plants.Using 15N nitrate labeling,we confirmed the nitrate-transport—from roots to shoots—function of FaNRT1.1 in the strawberry plants with transgenic hairy roots.Taken together,sufficient hairy roots can be induced using an efficient transgenic hairy root system,which can be effectively applied to gene function research,such as the analysis of the nitrate-transport activity of FaNRT1.1. 展开更多
关键词 Strawberry Hairy roots In vivo injection Transgenic system FaNRT1.1 Nitrate
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The whole-genome dissection of root system architecture provides new insights for the genetic improvement of alfalfa(Medicago sativa L.) 认领 引用 被引量：3
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作者 Xueqian Jiang Xiangcui Zeng +9 位作者 Ming Xu Mingna Li Fan Zhang Fei He Tianhui Yang Chuan Wang Ting Gao Ruicai Long Qingchuan Yang Junmei Kang 《Horticulture Research》 SCIE CSCD 2025年第1期91-103,共13页
Appropriate root system architecture(RSA)can improve alfalfa yield,yet its genetic basis remains largely unexplored.This study evaluated six RSA traits in 171 alfalfa genotypes grown under controlled greenhouse condit... Appropriate root system architecture(RSA)can improve alfalfa yield,yet its genetic basis remains largely unexplored.This study evaluated six RSA traits in 171 alfalfa genotypes grown under controlled greenhouse conditions.We also analyzed five yield-related traits in normal and drought stress environments and found a significant correlation(0.50)between root dry weight(RDW)and alfalfa dry weight under normal conditions(N_DW).A genome-wide association study(GWAS)was performed using 1303374 single-nucleotide polymorphisms(SNPs)to explore the relationships between RSA traits.Sixty significant SNPs(-log10(P)≥5)were identified,with genes within the 50 kb upstream and downstream ranges primarily enriched in GO terms related to root development,hormone synthesis,and signaling,as well as morphological development.Further analysis identified 19 high-confidence candidate genes,including AUxIN RESPONSE FACTORs(ARFs),LATERAL ORGAN BOUNDARIES-DOMAIN(LBD),and WUSCHEL-RELATED HOMEOBOX(WOX).We verified that the forage dry weight under both normal and drought conditions exhibited significant differences among materials with different numbers of favorable haplotypes.Alfalfa containing more favorable haplotypes exhibited higher forage yields,whereas favorable haplotypes were not subjected to human selection during alfalfa breeding.Genomic prediction(GP)utilized SNPs from GWAS and machine learning for each RSA trait,achieving prediction accuracies ranging from 0.70 for secondary root position(SRP)to 0.80 for root length(RL),indicating robust predictive capability across the assessed traits.These findings provide new insights into the genetic underpinnings of root development in alfalfa,potentially informing future breeding strategies aimed at improving yield. 展开更多
关键词 drought stress root system architecture single nucleotide polymorphism appropriate root system architecture rsa can genome wide association study genomic prediction yield alfalfa
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Crop root system architecture in drought response 认领 引用 被引量：7
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作者 Yanjun Zhang Xi Wu +2 位作者 Xingrong Wang Mingqiu Dai Yunling Peng 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2025年第1期4-13,共10页
Drought is a natural disaster that profoundly impacts on global agricultural production,significantly reduces crop yields,and thereby poses a severe threat to worldwide food security.Addressing the challenge of effect... Drought is a natural disaster that profoundly impacts on global agricultural production,significantly reduces crop yields,and thereby poses a severe threat to worldwide food security.Addressing the challenge of effectively improving crop drought resistance(DR)to mitigate yield loss under drought conditions is a global issue.An optimal root system architecture(RSA)plays a pivotal role in enhancing the capacity of crops to efficiently uptake water and nutrients,which consequently strengthens their resilience against environmental stresses.In this review,we discuss the compositions and roles of crop RSA and summarize the most recent developments in augmenting drought tolerance in crops by manipulating RSA-related genes.Based on the current research,we propose the potential optimal RSA configuration that could be helpful in enhancing crop DR.Lastly,we discuss the existing challenges and future directions for breeding crops with enhanced DR capabilities through genetic improvements targeting RSA. 展开更多
关键词 Crop Drought resistance Root system architecture Genetic improvement
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Root system architecture and its scaling relationships of Reaumuria soongorica in Alxa steppe desert,Northwest China 认领 引用 被引量：2
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作者 MA Xiongzhong WANG Xinping XIONG Weihong 《Journal of Arid Land》 SCIE CSCD 2025年第2期271-284,共14页
Root system architecture has often been overlooked in plant research despite its critical role in plant adaptation to environmental conditions.This study focused on the root system architecture of the desert shrub Rea... Root system architecture has often been overlooked in plant research despite its critical role in plant adaptation to environmental conditions.This study focused on the root system architecture of the desert shrub Reaumuria soongorica in the Alxa steppe desert,Northwest China.Plant samples were collected during May-September 2019.Using excavation methods,in situ measurements,and root scanning techniques,we analyzed the root distribution,topology,and branching patterns of R.soongorica across an age sequence of 7-51 a.Additionally,we investigated the allometric relationships of root collar diameter with total coarse root length,biomass,and topological parameters.The results showed that the roots of R.soongorica were predominantly concentrated in shallow soil layers(10-50 cm),with lateral root branching and biomass allocation increasing with shrub age.The root topology exhibited a herringbone-like structure,with average topological and modified topological indices of 0.89 and 0.96,respectively,both of which adjusted with shrub age.The root system displayed a self-similar branching pattern,maintaining a constant cross-sectional area ratio of 1.13 before and after branching,deviating from the area-preserving rule.These adaptive traits allow R.soongorica to efficiently expand its nutrient acquisition zone,minimize internal competition,and optimize resource uptake from the upper soil layers.Furthermore,significant linear relationships were observed between log10-transformed root collar diameter and log10-transformed total coarse root length,biomass,and topological parameters.These findings advance non-destructive approaches for studying root characteristics and contribute to the development of root-related models.Besides,this study provides new insights into the adaptive strategies of R.soongorica under extreme drought conditions,offering valuable guidance for species selection and cultivation in desert restoration efforts. 展开更多
关键词 Reaumuria soongorica root system architecture root topology root branching pattern area-preserving rule Alxa steppe desert
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Optimized boll-loading capacity of cotton root system increases seedcotton yield under wheat-cotton straw return with appropriate nitrogen fertilization 认领 引用
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作者 Zhitao Liu Wen Jin +5 位作者 Qin Wang Wei Hu Binglin Chen Yali Meng Haishui Yang Zhiguo Zhou 《The Crop Journal》 SCIE CAS CSCD 2025年第2期576-586,共11页
Long-term straw return with appropriate nitrogen(N)fertilization increases seedcotton yield and fiber quality,and the root system plays an important role in cotton production.However,under straw return and N fertiliza... Long-term straw return with appropriate nitrogen(N)fertilization increases seedcotton yield and fiber quality,and the root system plays an important role in cotton production.However,under straw return and N fertilization,the relationship between the cotton boll-loading capacity of the root system and seedcotton yield remains unclear.In this study,a ten years of long-term field experiment was conducted in a wheat-cotton rotation system.The effects of straw treatments(straw return and straw removal)and N rates(N0,N75,N150 and N300 representing 0,75,150 and 300 kg N ha-1,respectively)on cotton root activity,boll-loading capacity of the root system and their relationship to seedcotton yield from 2019 to 2022 were quantified.The results showed that straw return with an appropriate N fertilization of N150 increased root biomass,the rate and components of root-bleeding sap,as well as boll-loading capacity of the root system and seedcotton yield,but decreased the ratio of root to shoot biomass.Furthermore,the root-bleeding sap rate reached the maximum at 30 d post anthesis(DPA)during the peak boll setting stage.However,the contents of nitrate-N,free amino acids and soluble sugar in root-bleeding sap decreased from 10 DPA.Notably,in 2021 and at 30 DPA,the highest contents of nitrate-N(4.8μg mL-1)and free amino acids(8.3μg mL-1),as well as soluble sugar(3.4μg mL-1)were observed at N150 under straw return.The increase in seedcotton yield is positively correlated to the soluble sugar content.Straw return significantly increased the boll-loading capacity of the root system,which first increased but then decreased with the increase in N fertilization.Under straw return with N150,the maximum seecotton yield(3455-4544 kg ha-1)was recorded,and the largest boll loading(49-54 boll 100 g-1)and boll capacity(242-292 g 100 g-1)of root system at the boll opening stage were observed.Therefore,straw return with appropriate N fertilization improved root activity and the boll-loading capacity of the root system,thereby increasing seedcotton yield.This study provides new insights into improving seedcotton yield from the perspective of coordinating cotton growth. 展开更多
关键词 Wheat-cotton straw return Nitrogen fertilization Seedcotton yield Root-bleeding sap Boll-loading capacity of the root system
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The regulatory mechanism of the low-nitrogen-responsive MADS-box transcription factor PpAGL24 in peach root system development and nitrogen utilization 认领 引用 被引量：1
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作者 Chenwen Yu Huilong Cai +14 位作者 Jiahui Liang Xuelian Wu Haixiang Yu Fengzhen Huang Hongrui Wang Zhe Wang Shihao Fan Robert Samwel Ngomuo Jian Guo Qiuju Chen Yangyang Gao Huaifeng Gao Jingjing Luo Futian Peng Yuansong Xiao 《Fruit Research》 2025年第1期314-323,共10页
Nitrogen critically regulates peach yield formation and fruit quality development through multifaceted physiological mechanisms.In peach production,the problems of large nitrogen input and low Nitrogen Use Efficiency(... Nitrogen critically regulates peach yield formation and fruit quality development through multifaceted physiological mechanisms.In peach production,the problems of large nitrogen input and low Nitrogen Use Efficiency(NUE)are more prominent.Therefore,mining key genes for efficient nitrogen utilization in peach is crucial for improving NUE and reducing nitrogen use.Integrated transcriptomic profiling of peach rootstock'Shannong-1'under low-nitrogen(0.1 mM)treatment identified the MADS-box transcription factor PpAGL24.Functional characterization revealed that PpAGL24 modulates root system architecture and coordinates nitrogen uptake-assimilation pathways,suggesting its pivotal role in enhancing NUE.PpAGL24 expressed in peach roots and overexpressed in Arabidopsis thaliana both resulted in an increased number of lateral roots and higher nitrogen content.Transcriptome sequencing of PpAGL24-overexpressing peach roots revealed its putative regulatory network governing'lateral root development','nitrate assimilation',and'nitrogen metabolism',suggesting its hierarchical coordination in root developmental plasticity and nitrogen remodeling.Dual-luciferase and yeast one-hybrid assays showed that PpAGL24 can activate the transcription of the nitrite reductase-encoding gene PpNiR1.This study reveals a new mechanism by which the MADS-box transcription factor PpAGL24 regulates root growth and nitrogen assimilation in peach trees by modulating the PpNiR1 gene,which provides theoretical support for the improvement of NUE and the reduction of nitrogen inputs in peach orchards. 展开更多
关键词 key genes low nitrogen responsive peach mads box transcription factor nitrogen use efficiency nitrogen utilization ppagl root system development
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faCRSA:An automated pipeline for high-throughput analysis of crop root system architecture 认领 引用
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作者 Jiakun Ge Ruinan Zhang +8 位作者 Yujie He Zhuangzhuang Sun Qing Li Shichao Jin Jian Cai Qin Zhou Mei Huang Xiao Wang Dong Jiang 《The Crop Journal》 SCIE CAS CSCD 2025年第6期1919-1927,共9页
Optimizing root system architecture(RSA)is essential for plants because of its critical role in acquiring water and nutrients from the soil.However,the subterranean nature of roots complicates the measurement of RSA t... Optimizing root system architecture(RSA)is essential for plants because of its critical role in acquiring water and nutrients from the soil.However,the subterranean nature of roots complicates the measurement of RSA traits.Recently developed rhizobox methods allow for the rapid acquisition of root images.Nevertheless,effective and precise approaches for extracting RSA features from these images remain underdeveloped.Deep learning(DL)technology can enhance image segmentation and facilitate RSA trait extraction.However,comprehensive pipelines that integrate DL technologies into image-based root phenotyping techniques are still scarce,hampering their implementation.To address this challenge,we present a reproducible pipeline(faCRSA)for automated RSA traits analysis,consisting of three modules:(1)the RSA traits extraction module functions to segment soil-root images and calculate RSA traits.A lightweight convolutional neural network(CNN)named RootSeg was proposed for efficient and accurate segmentation;(2)the data storage module,which stores image and text data from other modules;and(3)the web application module,which allows researchers to analyze data online in a user-friendly manner.The correlation coefficients(R2)of total root length,root surface area,and root volume calculated from faCRSA and manually measured results were 0.96**,0.97**,and 0.93**,respectively,with root mean square errors(RMSE)of 8.13 cm,1.68 cm2,and 0.05 cm3,processed at a rate of 9.74 s per image,indicating satisfying accuracy.faCRSA has also demonstrated satisfactory performance in dynamically monitoring root system changes under various stress conditions,such as drought or waterlogging.The detailed code and deployable package of faCRSA are provided for researchers with the potential to replace manual and semi-automated methods. 展开更多
关键词 Root system architecture Deep learning Root image analysis Web application Stress response
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The influence of plant root system architectural properties upon the stability of loess hillslopes,Northeast Qinghai,China 认领 引用 被引量：27
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作者 FU Jiang-tao HU Xia-song +5 位作者 BRIERLEY Gary QIAO Na YU Qin-qin LU Hai-jing LI Guo-rong ZHU Hai-li 《Journal of Mountain Science》 SCIE CSCD 2016年第5期785-801,共17页
To investigate the influence of root system architectural properties of three indigenous （cold- adapted） shrubs on the hillslope stability of loess deposits in the Xining Basin, northeast part of Qinghai-Tibet Plate... To investigate the influence of root system architectural properties of three indigenous （cold- adapted） shrubs on the hillslope stability of loess deposits in the Xining Basin, northeast part of Qinghai-Tibet Plateau （QTP）, indoor direct shear tests have been conducted on the remolded rooted soil of three shrubs. Test results show that root system architectural indices （root area ratio （RAR）, root length density （RLD） and root density （RD）） of the shrubs decline with depth and the relationship between RAR, RD and depth is exponential, while a power relationship describes the relationship between RLD and depth. The cohesion force of remolded rooted soil for the shrubs initially increases with depth, but it then demonstrates a slightly decreasing trend, which can be described with a power relationship. Power relationships also describe relationships between cohesion force and RAR, RLD and RD for the shrubs. As the growth period increases from lO to 17 months, the incremental increase in RAR is 48.32% ~ 21o.25% for Caragana korshinskii Kom and 0.56% ~ 166.85% for ZygophyUum xanthoxylon （Bunge） Maxim. This proportional increase is notably larger than that for RLD and RD. The increment in RAR is marginally greater for C. korshinskff than it is for Z. xanthoxylon. Correspondingly, the cohesion force incremental rates of remolded rooted soil for C. korshinskii and Z. xanthoxylon are 12.41% ~ 25.22% and 3.45% ~ 17.33% respectively. Meanwhile, as root content increases, the contribution by roots to cohesion force increases markedly until a threshold condition is reached. 展开更多
关键词 Cold region Semiarid region Soil reinforcement Hillslope stability Root system architectural indices Plateau
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Enhancing phosphorus uptake efficiency through QTL-based selection for root system architecture in maize 认领 引用 被引量：9
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作者 Riliang Gu Fanjun Chen +10 位作者 Lizhi Long Hongguang Cai Zhigang Liu Jiabo Yang Lifeng Wang Huiyong Li Junhui Li Wenxin Liu Guohua Mi Fusuo Zhang Lixing Yuan 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2016年第11期663-672,共10页
Root system architecture （RSA） plays an important role in phosphorus （P） acquisition, but enhancing P use efficiency （PUE） in maize via genetic manipulation of RSA has not yet been reported. Here, using a maize ... Root system architecture （RSA） plays an important role in phosphorus （P） acquisition, but enhancing P use efficiency （PUE） in maize via genetic manipulation of RSA has not yet been reported. Here, using a maize recombinant inbred line （RIL） population, we investigated the genetic relationships between PUE and RSA, and developed P-efficient lines by selection of quantitative trait loci （QTLs） that coincide for both traits. In low-P （LP） fields, P uptake efficiency （PupE） was more closely correlated with PUE （r = 0.48 -0.54）, and RSA in hydroponics was significantly related to PupE （r=0.25-0.30） but not to P utilization efficiency （PutE）. QTL analysis detected a chromosome region where two QTLs for PUE, three for PupE and three for RSA were assigned into two QTL clusters, Cl-bin3.04a and Cl-bin3.04b. These QTLs had favorable effects from alleles derived from the large-rooted and high-PupE parent. Marker-assisted selection （MAS） identified nine advanced backcross-derived lines carrying Cl-bin3.04a or Cl-bin3.04b that displayed mean increases of 22%-26% in PUE in LP fields. Furthermore, a line L224 pyramiding Cl- binB.04a and Cl-bin3.04b showed enhanced PupE, relying mainly on changes in root morphology, rather than root physiology, under both hydroponic and field conditions. These results highlight the physiological and genetic contributions of RSA to maize PupE, and provide a successful study case of developing P-efficient crops through QTL-based selection. 展开更多
关键词 Maize Quantitative trait loci Phosphorus Root system architecture Marker-assisted selection
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A Study of Tensile Strength Tests of Arborous Species Root System in Forest Engineering Technique of Shallow Landslide 认领 引用 被引量：7
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作者 YANG Yonghong LIU Shuzhen +1 位作者 WANG Chenghua TANG Chuan 《Wuhan University Journal of Natural Sciences》 EI CAS 2006年第4期892-896,共5页
One experiment was conducted, through tensile tests of Albazzia and Eucalypt roots culled from the fields. The other experiment was conducted, by testing anti-drawing strength of these root systems in the Albazzia and... One experiment was conducted, through tensile tests of Albazzia and Eucalypt roots culled from the fields. The other experiment was conducted, by testing anti-drawing strength of these root systems in the Albazzia and Eucalypt lands. These two experiments had an aim to give insights into the maximum tensile strength and anti-drawing strength of the root systems. Results indicated that the maximum tensile strength of root system is in an exponential relation with the diameter of root system while the maximum tensile strength is positively correlative with the diameter of root system. Anti-drawing force of root system together with root diameter, length, and soil bulk density are folded into a regression equation in an attempt to figure out the static friction coefficient between root system and its ambient soil. 展开更多
关键词 root system tensile strength anti-drawing strength tensile force
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Identification of QTL and underlying genes for root system architecture associated with nitrate nutrition in hexaploid wheat 认领 引用 被引量：3
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作者 Marcus GRIFFITHS Jonathan A.ATKINSON +5 位作者 Laura-Jayne GARDINER Ranjan SWARUP Michael P.POUND Michael H.WILSON Malcolm J.BENNETT Darren M.WELLS 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2022年第4期917-932,共16页
The root system architecture(RSA) of a crop has a profound effect on the uptake of nutrients and consequently the potential yield. However, little is known about the genetic basis of RSA and resource adaptive response... The root system architecture(RSA) of a crop has a profound effect on the uptake of nutrients and consequently the potential yield. However, little is known about the genetic basis of RSA and resource adaptive responses in wheat(Triticum aestivum L.). Here, a high-throughput germination paper-based plant phenotyping system was used to identify seedling traits in a wheat doubled haploid mapping population, Savannah×Rialto. Significant genotypic and nitrate-N treatment variation was found across the population for seedling traits with distinct trait grouping for root size-related traits and root distribution-related traits. Quantitative trait locus(QTL) analysis identified a total of 59 seedling trait QTLs. Across two nitrate treatments, 27 root QTLs were specific to the nitrate treatment. Transcriptomic analyses for one of the QTLs on chromosome 2 D, which was found under low nitrate conditions, revealed gene enrichment in N-related biological processes and 28 differentially expressed genes with possible involvement in a root angle response. Together, these findings provide genetic insight into root system architecture and plant adaptive responses to nitrate, as well as targets that could help improve N capture in wheat. 展开更多
关键词 doubled-haploid population nitrate RNA-seq quantitative trait loci root system architecture Triticum aestivum L.(wheat)
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Optimal root system strategies for desert phreatophytic seedlings in the search for groundwater 认领 引用 被引量：2
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作者 LI Changjun ZENG Fanjiang +4 位作者 ZHANG Bo LIU Bo GUO Zichun GAO Huanhuan TIYIP Tashpolat 《Journal of Arid Land》 SCIE CSCD 2015年第4期462-474,共13页
Desert phreatophytes are greatly dependent on groundwater, but how their root systems adapt to different groundwater depths is poorly understood. In the present study, shoot and root growths of Alhagi sparsifolia Shap... Desert phreatophytes are greatly dependent on groundwater, but how their root systems adapt to different groundwater depths is poorly understood. In the present study, shoot and root growths of Alhagi sparsifolia Shap. seedlings were studied across a gradient of groundwater depths. Leaves, stems and roots of different orders were measured after 120 days of different groundwater treatments. Results indicated that the depth of soil wetting front and the vertical distribution of soil water contents were highly controlled by groundwater depths. The shoot growth and biomass of A. sparsifolia decreased, but the root growth and rooting depth increased under deeper groundwater conditions. The higher ratios of root biomass, root/shoot and root length/leaf area under deeper groundwater conditions implied that seedlings of A. sparsifolia economized carbon cost on their shoot growths. The roots of A. sparsifolia distributed evenly around the soil wetting fronts under deeper groundwater conditions. Root diameters and root lengths of all orders were correlated with soil water availabilities both within and among treatments. Seedlings of A. sparsifolia produced finer first- and second-order roots but larger third- and fourth-order roots in dry soils. The results demonstrated that the root systems of desert phreatophytes can be optimized to acquire groundwater resources and maximize seedling growth by balancing the costs of carbon gain. 展开更多
关键词 desert phreatophytes root system strategy groundwater depth soil water biomass partition
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Interacted Effect of Arbuscular Mycorrhizal Fungi and Polyamines on Root System Architecture of Citrus Seedlings 认领 引用 被引量：3
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作者 WU Qiang-sheng ZOU Ying-ning +1 位作者 LIU Chun-yan LU Ting 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2012年第10期1675-1681,共7页
Either arbuscular mycorrhizal fungi （AMF） or polyamines （PAs） may change root system architecture （RSA） of plants, whereas the interaction of AMF and PAs on RSA remains unclear. In the present study, we studied ... Either arbuscular mycorrhizal fungi （AMF） or polyamines （PAs） may change root system architecture （RSA） of plants, whereas the interaction of AMF and PAs on RSA remains unclear. In the present study, we studied the interaction between AMF （Paraglomus occultum） and exogenous PAs, including putrescine （Put）, spermidine （Spd） and spermine （Spin） on mycorrhizal development of different parts of root system, plant growth, RSA and carbohydrate concentrations of 6-m-old citrus （Citrus tangerine Hort. ex Tanaka） seedlings. After 14 wk of PAs application, PA-treated mycorrhizal seedlings exhibited better mycorrhizal colonization and numbers of vesicles, arbuscules, and entry points, and the best mycorrhizal status of taproot, first-, second-, and third-order lateral roots was respectively found in mycorrhizal seedlings supplied with Put, Spd and Spm, suggesting that PAs might act as a regulated factor of mycorrhizal development through transformation of root sucrose more into glucose for sustaining mycorrhizal development. AMF usually notably increases RSA traits （taproot length, total length, average diameter, projected area, surface area, volume, and number of first-, second-, and third-order lateral roots） of only PA-treated seedlings. Among the three PA species, greater positive effects on RSA change and plant biomass increment of the seedlings generally rank as Spd〉Spm〉Put, irrespective of whether or not AMF colonization. PAs significantly changed the RSA traits in mycorrhizal but not in non-mycorrhizal seedlings. It suggests that the application of PAs （especially Spd） to AMF plants would optimize RSA of citrus seedlings, thus increasing plant growth （shoot and root dry weight）. 展开更多
关键词 citrus lateral root mycorrhiza putrescine root system architecture spermidine spermine
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Regulation of ABA on Rice Root System Growth under Cadmium Stress 认领 引用 被引量：6
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作者 宋新华 王凯 赵凤云 《Agricultural Science & Technology》 CAS 2010年第6期15-17,21,共3页
[Objective] The regulation of ABA on rice root system growth under Cd stress was studied.[Method] Taking rice Zhonghua No.11 as material,changes in rice root system growth were studied under the treatments of Cd,Cd ＋... [Objective] The regulation of ABA on rice root system growth under Cd stress was studied.[Method] Taking rice Zhonghua No.11 as material,changes in rice root system growth were studied under the treatments of Cd,Cd ＋ ABA and Cd ＋ ABA inhibitor.[Result] Exogenous ABA could shorten the length of primary roots and adventitious roots of rice and could obviously inhibit the formation of lateral roots in primary roots and adventitious roots;ABA could obviously shorten the distance from root hair to root tip,but had little effect on the quantity of adventitious roots.[Conclusion] ABA takes part in the regulation in rice root system growth under Cd stress. 展开更多
关键词 Cd stress ABA ABA inhibitor Rice root system
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Regulation of Sucrose and Zinc on Root System Growth in Rice 认领 引用 被引量：4
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作者 张承仁 徐小利 +5 位作者 冯永永 刘乐雨 冯婷婷 陈振华 蔡凤香 赵凤云 《Agricultural Science & Technology》 CAS 2012年第1期168-172,共5页
[Objective] The aim was to study the relationship between urcrose, zinc and the root system growth in rice. [Method] Changes of root system growth, ROS generation and root system proton export ability were analyzed in... [Objective] The aim was to study the relationship between urcrose, zinc and the root system growth in rice. [Method] Changes of root system growth, ROS generation and root system proton export ability were analyzed in rice （Oryza sativa L. cv Zhonghua No.11） treated with different concentrations of Zn （NO3）3 sucrose, com- bined sucrose and Zn （NO3）3 mannitol as well as mannitol plus Zn （NO3）2. [Result] The results showed that treatment with 1-3 mM Zn（NO3）2 resulted in significant increases in total root length umber and in accumulation of H202 and 02- but decreases in root system proton export ability. With the exception of shoot length, the length of primary, adventitious, and lateral roots, and the number of adventitious, and lateral roots on primary /adventitious roots were all influenced by different concentrations of sucrose. High concentrations of sucrose caused increases in H202 and O2-, starva- tion or high concentrations of sucrose reduced root system proton export ability after treating with or without Zn. However, at the same concentration of sucrose, different changes of these indicators were observed between Zn and non-Zn treatments. The regulation of root system growth induced by sucrose was marked different from that of mannitol at the same concentration of 5%, suggesting that these effects were caused by sugar signal but not by osmotic potential. [Conclusion] This study indicat- ed that both sucrose and Zn play important roles in the regulation of rice root system growth. 展开更多
关键词 Sucrose Zinc Rice root system
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Biomechanical Response of the Root System in Tomato Seedlings under Wind Disturbance 认领 引用 被引量：1
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作者 Zhengguang Liu Jun Yang +2 位作者 Tobi Fadiji Zhiguo Li Jiheng Ni 《Phyton-International Journal of Experimental Botany》 SCIE 2023年第4期1071-1090,共20页
Wind disturbance as a green method can effectively prevent the overgrowth of tomato seedlings,and its mechanism may be related to root system mechanics.This study characterized the biophysical mechanical properties of... Wind disturbance as a green method can effectively prevent the overgrowth of tomato seedlings,and its mechanism may be related to root system mechanics.This study characterized the biophysical mechanical properties of taproot and lateral roots of tomato seedlings at five seedling ages and seedling substrates with three different moisture content.The corresponding root system-substrate finite element(FE)model was then developed and validated.The study showed that seedling age significantly affected the biomechanical properties of the taproot and lateral roots of the seedlings and that moisture content significantly affected the biomechanical properties of the seedling substrate(p<0.05).The established FE model was sensitive to wind speed,substrate moisture content,strong seedling index,and seedling age and was robust.The multiple linear regression equations obtained could predict the maximum stress and strain of the root system of tomato seedlings in the wind field.The strong seedling index had the greatest impact on the biomechanical response of the seedling root system during wind disturbance,followed by wind speed.In contrast,seedling age had no significant effect on the biomechanical response of the root system during wind disturbance.In the simulation,no mechanical damage was observed on the tissue of the seedling root system,but there were some strain behaviors.Based on the plant stress resistance,wind disturbance may affect the growth and development of the root system in the later growth stage.In this study,finite element and statistical analysis methods were combined to provide an effective approach for indepth analysis of the biomechanical mechanisms of wind disturbances that inhibit tomato seedlings’growth from the root system’s perspective. 展开更多
关键词 Tomato seedling root system age level wind disturbance biomechanical response finite element analysis
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Effects of Superoxide Radical on Root System Growth and Auxin Distribution in Rice 认领 引用 被引量：2
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作者 任静 冯婷婷 +4 位作者 陈振华 刘乐雨 冯永永 高华健 赵凤云 《Agricultural Science & Technology》 CAS 2012年第8期1655-1657,1663,共3页
[Objective] This study aimed to investigate the effect of superoxide radical on root system growth and auxin distribution in rice （Oryza sativa L. cv Zhonghua No.11）. [Method] With rice Zhonghua No.ll as the experim... [Objective] This study aimed to investigate the effect of superoxide radical on root system growth and auxin distribution in rice （Oryza sativa L. cv Zhonghua No.11）. [Method] With rice Zhonghua No.ll as the experimental material, the effects of DDC （SOD inhibitor） and Tiron （superoxide radical scavenger） on the root system growth, superoxide radical generation and root system auxin distribution in rice were analyzed. [Result] The growth and elongation of primary and adventitious roots were significantly promoted by DDC, while Tiron significantly inhibited the growth and elongation of shoots, primary roots and their lateral roots, and also suppressed the formation and growth of the adventitious roots as well as the elongation of their lateral roots. The superoxide radical was increased with the induction of DDC, while Tiron decreased the accumulation of superoxide radical. Increased accumulation of auxin in the vascular bundle and behind the elongation zone was observed in DDC- treated roots, while the treatment with Tiron resulted in a decrease of auxin in the same position. [Conclusion] This study indicated that the regulation of rice root sys- tem growth by superoxide radical was closely related with the accumulation and distribution of auxin. 展开更多
关键词 Superoxide Radical Rice Root System Auxin
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Advances in experimental methods for root system architecture and root development 认领 引用 被引量：1
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作者 Jun-bang Wang Xiu-juan Zhang Chu Wu 《Journal of Forestry Research》 SCIE CAS CSCD 2015年第1期23-32,共10页
Plant roots play important roles in acquisition of water and nutrients, storage, anchoring, transport, and symbiosis with soil microorganisms, thus quantitative researches on root developmental processes are essential... Plant roots play important roles in acquisition of water and nutrients, storage, anchoring, transport, and symbiosis with soil microorganisms, thus quantitative researches on root developmental processes are essential to understand root functions and root turnover in ecosystems,and at the same time such researches are the most difficult because roots are hidden underground. Therefore, how to investigate efficiently root functions and root dynamics is the core aspect in underground ecology. In this article, we reviewed some experimental methods used in root researches on root development and root system architecture, and summarized the advantages and shortages of these methods. Based on the analyses, we proposed three new ways to more understand root processes：（1） new experimental materials for root development;（2） a new observatory system comprised of multiple components, including many observatory windows installed in field, analysis software,and automatic data transport devices;（3） new techniques used to analyze quantitatively functional roots. 展开更多
关键词 Root system analysis Fractal geometry Novel materials
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Abnormal Secondary Growth and Histochemical Localization of Alkaloids in Root System of Aconitum flavum Hand.-Mazz. 认领 引用
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作者 祁建钊 郭继元 徐青 《Agricultural Science & Technology》 CAS 2011年第9期1313-1317,共5页
[Objective] The purpose of this study was to clarify the structure,growth pattern and histochemical localization of alkaloids in root system of Aconitum flavum Hand.-Mazz.[Method] Paraffin sectioning and histochemistr... [Objective] The purpose of this study was to clarify the structure,growth pattern and histochemical localization of alkaloids in root system of Aconitum flavum Hand.-Mazz.[Method] Paraffin sectioning and histochemistry were employed for performing the analysis in this study.[Result] The root system of Aconitum flavum Hand.-Mazz.consists of taproot,lateral root and adventitious root.The primary structure of root system is normal,but secondary structure shows abnormal.The cambium and the extra cambium of taproot form a ＂U＂-shaped secondary vascular bundle and tertiary bundle in abnormal secondary structure.The sieve tube group is made of little sieve tube group which is differentiated from primary phloem and cambium.Meanwhile,the secondary xylem in tuberous root also appears to be a ＂U＂ shape.Parenchyma cells of secondary phloem occupy most of the tuberous root.The sieve tube group of tuberous root is mainly differentiated from parenchyma cell of secondary phloem.[Conclusion] The difference in abnormal secondary structure of taproot and tuberous root are attributed to their varied cambium compose and activity pattern.Alkaloids are mainly accumulated in parenchyma cell of the inside cortex and between bundle in taproot,while parenchyma of secondary phloem and pith in tuberous root. 展开更多
关键词 Aconitum flavum Hand. - Mazz. Root system Abnormal secondary growth Alkaloids Histochemical localization
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