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Moderate soil drying mitigates the impairment of high temperature-induced spikelet opening by enhancing jasmonate accumulation in the lodicules of photo-thermosensitive male-sterile rice 认领 引用
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作者 Weiyang Zhang Ying Liu +11 位作者 Wenqian Miao Yujiao Zhou Jun Miao Kuanyu Zhu Weilu Wang Yunji Xu Junfei Gu Hao Zhang Zhiqin Wang Lijun Liu Jianhua Zhang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第8期3169-3183,共15页
This study investigated the role of jasmonates(JAs)in mitigating the impairment of high temperature(HT)stress-induced spikelet opening in photo-thermosensitive genetic male-sterile(PTGMS)rice under controlled moderate... This study investigated the role of jasmonates(JAs)in mitigating the impairment of high temperature(HT)stress-induced spikelet opening in photo-thermosensitive genetic male-sterile(PTGMS)rice under controlled moderate soil drying(MD).Two PTGMS rice varieties were grown under normal temperature(NT)and HT conditions,paired with either well-watered(WW)or MD strategies during anthesis,in both controlled-climate pot and open-air field conditions over multiple years.The MD treatment demonstrated significant protective effects compared to the conventional WW regime under HT stress,which significantly reduced the levels of JAs in lodicules and worsened spikelet opening impairment and hybrid seed yield loss.The MD regime enhanced the accumulation of JAs in lodicules,effectively alleviating HT-induced spikelet opening impairment and hybrid seed yield reduction.This protective mechanism operates through multiple pathways:(1)promoting starch hydrolysis into soluble sugars,(2)upregulating the expression of aquaporin genes,and(3)enhancing antioxidant capacity,thereby maintaining cellular osmotic and redox homeostasis in the lodicules.The crucial role of JAs in this mechanism was confirmed using JA-deficient mutants,transgenic rice lines with varying JA biosynthetic capacities,and exogenous applications of JAs.These findings indicate that MD is a more effective cultivation strategy than traditional WW in protecting PTGMS rice from HT stress,which is achieved by modulating levels of JAs to maintain osmotic and redox homeostasis in the lodicules,thus improving spikelet opening and hybrid seed yield under HT stress during anthesis. 展开更多
关键词 high temperature moderate soil drying jasmonates spikelet opening photo-thermosensitive genetic malesterile(PTGMS) rice
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Brassinosteroids facilitate controlled soil drying to mitigate heat stress on pistil fertilization in photo-thermosensitive genetic male-sterile rice 认领 引用
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作者 Weiyang Zhang Wei Cai +12 位作者 Yujiao Zhou Ying Liu Wenqian Miao Kuanyu Zhu Weilu Wang Yunji Xu Yidi Sun Junfei Gu Hao Zhang Zhiqin Wang Lijun Liu Jianhua Zhang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第7期2755-2770,共16页
Globally recurrent extreme high temperature(HT)events severely limit rice production.This study investigated whether a controlled moderate soil drying(MD)could replace the conventional well-watered(WW)regime to more e... Globally recurrent extreme high temperature(HT)events severely limit rice production.This study investigated whether a controlled moderate soil drying(MD)could replace the conventional well-watered(WW)regime to more effectively mitigate HT stress on pistil fertilization in photo-thermosensitive genetic male-sterile(PTGMS)rice,and examined the role of brassinosteroids(BRs).Two PTGMS rice varieties were cultivated under normal temperature(NT)and HT conditions,paired with WW and MD strategies during anthesis.In the conventional WW regime,waterlogging reduced BR levels in roots and pistils due to excessive decomposition,weakening active water uptake driven by root activity and failing to alleviate transpiration-pulled passive water extraction hampered by restricted stomatal openings.Thereby,it caused water imbalance in plants and weakened pistil function due to a suppressed ascorbate-glutathione(AsA-GSH)cycle and hyperactive nicotinamide adenine dinucleotide phosphate oxidase(NOX)activity.This exacerbated pistil fertilization impairment and hybrid seed yield loss under HT stress.Conversely,by promoting BR synthesis and inhibiting its decomposition in roots and pistils,the MD strategy enhanced root activity and transpiration-driven water uptake.It maintained plant water balance and supported pistil function by suppressing NOX activity and enhancing AsA-GSH cycledriven redox homeostasis.Thus,it mitigated HT-induced pistil fertilization impairment and hybrid seed yield loss.The precise function of BRs in moderating the protective effects of MD against the detrimental impacts of HT stress on pistil fertilization in PTGMS rice was confirmed through genetic and chemical approaches.Consequently,a controlled MD method proved more effective than the conventional WW regime in alleviating HT stress on pistil fertilization in PTGMS rice by promoting BR enhancement. 展开更多
关键词 high temperature moderate soil drying brassinosteroids photo-thermosensitive genetic male-sterile(PTGMS)rice pistil fertilization
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Cytokinins redistributing drives nitrogen remobilization from source to sink in wheat under moderate water limitation during grain filling 认领 引用
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作者 Ying Liu Jiangyao Fu +12 位作者 Haotian Chen Yajun Zhang Siyu Li Kuanyu Zhu Yunji Xu Weilu Wang Junfei Gu Hao Zhang Zhiqin Wang Lijun Liu Jianhua Zhang Weiyang Zhang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第5期1857-1870,共14页
This study examined the involvement of cytokinins in the process by which moderate water limitation(MWL) mediates nitrogen(N) remobilization from source to sink during the grain-filling phase in wheat.Field experiment... This study examined the involvement of cytokinins in the process by which moderate water limitation(MWL) mediates nitrogen(N) remobilization from source to sink during the grain-filling phase in wheat.Field experiments were performed using N application rates of low(LN),medium(MN),and high(HN).Two soil moisture regimes were implemented for each N rate:conventional well-watered(CWW) and MWL post anthesis.The MWL application optimized N,total free amino acids(FAA),and trans-zeatin(Z)+trans-zeatin riboside(ZR) reallocation from the source organs(stems and leaves) to the sink organ(spikes) in wheat.Compared to those in the CWW regime,the activities of proteolytic enzymes,including endopeptidase,carboxypeptidase,and aminopeptidase within stems and leaves,and the expression levels of total FAA transporter genes in spikes were significantly elevated in the MWL regime,showing a close correlation with the Z+ZR levels in the spikes.Application of kinetin to stems and leaves significantly inhibited proteolytic enzyme activities,promoting N retention in stems and leaves,decreasing N accumulation in the sink organ,and reducing the N harvest index.In contrast,applying kinetin to spikes significantly upregulated expression levels of FAA transporter genes,reducing N retention in stems and leaves,increasing N accumulation in the sink organ,and raising the N harvest index.Such facilitation induced by the MWL in the remobilization of N from source to sink was greater at HN than at LN or MN.Results demonstrate that postanthesis MWL can significantly intensify the remobilization of N from source to sink,while also synergistically enhancing grain yield and N use efficiency through strategically redistributing cytokinins(Z+ZR) between source and sink in wheat. 展开更多
关键词 cytokinins moderate water limitation nitrogen remobilization nitrogen use efficiency wheat(Triticum aestivum L.)
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Alternate wetting and moderate drying irrigation improves rice cooking and eating quality by optimizing lipid and fatty acid synthesis in grains 认领 引用
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作者 Yunji Xu Xuelian Weng +7 位作者 Shupeng Tang Xiufeng Jiang Weiyang Zhang Kuanyu Zhu Guanglong Zhu Hao Zhang Zhiqin Wang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第1期68-80,共13页
Alternate wetting and drying irrigation(AWD)significantly influences the cooking and eating quality of rice(Oryza sativa L.).However,the mechanisms by which AWD affects rice cooking and eating quality remain unclear.L... Alternate wetting and drying irrigation(AWD)significantly influences the cooking and eating quality of rice(Oryza sativa L.).However,the mechanisms by which AWD affects rice cooking and eating quality remain unclear.Lipid and free fatty acid contents in grains correlate positively with cooking and eating quality of rice.This study examined Yangdao 6(YD6,a conventional taste indica inbred)and Nanjing 9108(NJ9108,a superior taste japonica inbred)cultivated under conventional irrigation(CI),alternate wetting and moderate drying irrigation(AWMD),and alternate wetting and severe drying irrigation(AWSD)from 10 days after transplanting to maturity.The research investigated the relationship between lipid and free fatty acid biosynthesis in grains and the cooking and eating quality of rice.Compared to CI treatment,AWMD significantly enhanced the contents of lipid,total free fatty acids(TFFAs),free unsaturated fatty acids(FUFAs),linoleic acid,and oleic acid in milled rice by increasing activities of enzymes associated with lipid synthesis,while AWSD produced opposite effects.Correlation analysis revealed that elevated levels of lipid,TFFAs,FUFAs,linoleic acid,and oleic acid contribute to improved rice cooking and eating quality.The findings demonstrate that AWMD enhances cooking and eating quality of milled rice through optimization of lipid and fatty acid synthesis in rice grains. 展开更多
关键词 rice(Oryza sativa L.) cooking and eating quality lipid content fatty acid content alternate wetting and drying irrigation
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Post-anthesis dry matter production and leaf nitrogen distribution are associated with root-derived cytokinins gradient in rice 认领 引用
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作者 Kuanyu Zhu Yuemei Xu +9 位作者 Zhiwei Sun Yajun Zhang Weiyang Zhang Yunji Xu Junfei Gu Hao Zhang Zhiqin Wang Lijun Liu Jianhua Zhang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2025年第6期2106-2122,共17页
Aligning leaf nitrogen(N) distribution to match the light gradient is crucial for maximizing canopy dry matter production(DMP) and improving N utilization efficiency. However, the relationship between the gradient of ... Aligning leaf nitrogen(N) distribution to match the light gradient is crucial for maximizing canopy dry matter production(DMP) and improving N utilization efficiency. However, the relationship between the gradient of root-derived cytokinins and N distribution in rice leaves and its impact on DMP and the underlying mechanisms remains poorly understood. A two-year field experiment was conducted using two japonica N-efficient varieties(NEVs) and two japonica N-inefficient varieties(NIVs) under four different N rates(0, 90, 180, and 360 kg N ha-1). These selected varieties exhibited similar values in the coefficient of light extinction(KL). Results showed that at lower N rates(0–180 kg N ha-1), the NEVs exhibited greater dry matter weight at maturity, higher grain yield, and improved internal N use efficiency(IEN) compared to the NIVs, despite possessing comparable total N uptake. Compared with the NIVs, the NEVs exhibited a more pronounced nitrogen distribution gradient in leaves, as indicated by the coefficient of nitrogen extinction(KN) values during the middle and early grain-filling stages. This enhanced gradient led to improved coordination between light and nitrogen, resulting in greater photosynthetic production, particularly at lower N rates. Furthermore, the NEVs demonstrated a larger gradient of zeatin(Z)+zeatin riboside(ZR) in leaves(i.e., higher ratios of Z+ZR levels between upper and lower leaves), enhanced expression levels of genes related to N export in lower leaves and Z+ZR loading in the root, respectively, elevated enzymes activities related to N assimilation in upper leaves, in relative to the NIVs. Correlation and random forest analyses demonstrated a strong positive correlation between the Z+ZR gradient, KN, and DMP, and the gradient facilitated the export of N from lower leaves and its assimilation in upper leaves, contributing significantly to both KN and DMP. This process was closely linked to root activity, including root oxidation activity, root Z+ZR content, and Z+ZR loading capacity, as confirmed by applying an inhibitor or a promoter of cytokinins biosynthesis to roots. Interestingly, at the N rate of 360 kg N ha-1, both NEVs and NIVs showed indistinguishable plant traits, achieving a super high-yielding level(over 10.5 t ha-1) but with remarkably low IEN. The results suggest that increasing the Z+ZR gradient can improve KN and DMP, where it needs to maintain higher root activity, thus leading to high yield and high IEN. Further research is needed to explore and develop cultivation practices with reduced N to unlock the super-high-yielding potential of the NEVs. 展开更多
关键词 rice(Oryza sativa L.) grain yield dry matter production cytokinins gradient N distribution internal N use efficiency
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Untargeted lipidomic analysis of milled rice under different alternate wetting and soil drying irrigation regimes 认领 引用
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作者 Yunji Xu Xuelian Weng +6 位作者 Shupeng Tang Weiyang Zhang Kuanyu Zhu Guanglong Zhu Hao Zhang Zhiqin Wang Jianchang Yang 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2025年第9期3351-3367,共17页
Alternate wetting and soil drying irrigation(AWD)technique is crucial in infuencing grain quality in rice(Oryza sativa L.).Lipids are the third most abundant constituents in rice grains,after starch and proteins,and a... Alternate wetting and soil drying irrigation(AWD)technique is crucial in infuencing grain quality in rice(Oryza sativa L.).Lipids are the third most abundant constituents in rice grains,after starch and proteins,and are closely related to grain quality.However,it remains unclear about the changes in lipids profling under different AWD regimes.This study set up three irrigation regimes including conventional irrigation(CI),alternate wetting and moderate soil drying irrigation(AWMD),and alternate wetting and severe soil drying irrigation(AWSD).It explored lipidome changes in milled rice of Yangdao 6(YD6)using the untargeted lipidomics approach and analyzed rice cooking and eating quality.The results identifed seven lipid classes,55 lipid subclasses,and 1,086 lipid molecular species.Compared with the CI regime,the AWMD regime mainly altered lipid subclasses consisting of triglyceride(TG),ceramide(Cer),diglyceride(DG),bis-methyl lysophosphatidic acid(BisMePA),phosphocholine(PC),phosphoethanolamine(PE),monogalactosyldiacylglycerol(MGDG),and digalactosyl diglyceride(DGDG)in milled rice and improved cooking and eating quality of rice;in contrast,the AWSD regime distinctly changed lipid subclasses like TG,Cer,DG,PC,PE,hexosylceramide(Hex1Cer),DGDG,and BisMePA and degraded cooking and eating quality of rice.Specifcally,AWMD most signifcantly altered the expressions of lipid molecules,including DGDG(18:0_18:2),DGDG(16:0_14:0),PC(33:1),Cer(t17:0_26:0),and Cer(t17:0_16:0);AWSD most obviously influenced the expressions of TG(6:0_14:0_18:3),PC(41:1),TG(19:1_18:4_18:4),Hex1Cer(d18:2_24:0+O),and Hex1Cer(d18:2_24:1).These 10 altered lipid molecules in milled rice can be preferentially used for investigating their relationships with grain quality in rice. 展开更多
关键词 rice(Oryza sativa L.) untargeted lipidomics analysis alternate wetting and soil drying irrigation milled rice cooking and eating quality
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Polyamines mediate the effect of post-anthesis soil drying on starch granule size distribution in wheat kernels 认领 引用 被引量：3
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作者 Yunji Xu Mengting Qiu +3 位作者 Yinyin Li Xiyang Qian Junfei Gu Jianchang Yang 《The Crop Journal》 SCIE CSCD 2016年第6期444-458,共15页
Polyamines(PAs) are important endogenous plant growth regulators responding to environmental stress and mediating many physiological processes including grain filling in cereals.This study investigated whether PAs med... Polyamines(PAs) are important endogenous plant growth regulators responding to environmental stress and mediating many physiological processes including grain filling in cereals.This study investigated whether PAs mediate the effect of post-anthesis soil drying on starch granule size distribution,starch content,and weight of superior and inferior kernels of wheat(Triticum aestivum L.).Two wheat cultivars were grown in pots.Three treatments,well-watered(WW),moderate soil drying(MD) and severe soil drying(SD),were imposed from 9 days post-anthesis until maturity.PA levels in kernels and small,medium and large granules were measured.The results showed that superior kernels had much higher free spermidine(Spd) and free spermine(Spm) concentrations,larger volumes of medium starch granules,and smaller-sized large granules than did inferior kernels under all the treatments.Compared to WW,MD significantly increased the concentrations of free Spd and free Spm,activities of soluble starch synthase and granule-bound starch synthase,volume of medium granules,and starch content and kernel weight of inferior kernels,and decreased the size of large granules.SD produced the opposite effect.Application of Spd or Spm to spikes produced effects similar to those of MD,and application of an inhibitor of Spd and Spm synthesis produced effects similar to those of SD.These results suggest that PAs mediate the effect of post-anthesis soil drying on starch biosynthesis in wheat kernels by regulating key enzymes in starch synthesis and that elevated PA levels under MD increase the volume of medium granules and kernel weight of inferior kernels. 展开更多
关键词 Polyamines Starch granule size distribution Soil drying Triticum aestivum L.(wheat)
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