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Fungus Neosartorya(Aspergillus)fischeri improves the fitness,tolerance and absorption of heavy metals in Typha latifolia 认领 引用
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作者 Amauri Ponce-Hernández Candy Carranza-Álvarez +2 位作者 Ernestina Castro-Longoria Rufina Hernández-Martínez Domingo Martínez-Soto 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期218-230,共13页
Heavy metal contamination is a global issue caused by anthropogenic activities leading to severe negative effects on the environment and human health.To address this problem,bioremediation strategies utilizing plants ... Heavy metal contamination is a global issue caused by anthropogenic activities leading to severe negative effects on the environment and human health.To address this problem,bioremediation strategies utilizing plants such as Typha latifolia and their symbiotic fungi have been adopted to remediate contaminated areas and mitigate the harmful effects of these pollutants.In this study,the endophytic fungus Neosartorya fischeri was isolated from the roots of T.latifolia plants growing in heavy metal-contaminated sites.N.fischeri colonized the epidermis and root cortex and showed high tolerance to toxic concentrations of silver(Ag)(1 mg/kg),copper(Cu)(60 mg/kg)and cadmium(Cd)(8 mg/kg).N.fischeri removed 8.7%±0.5%Cd from the medium,biosorbed 15.24±0.2 mg/kg into its biomass,and enhanced the tolerance and bioaccumulation of Cd(184.18±1.14 mg/kg)in plant roots.Moreover,N.fischeri produces siderophores,volatile compounds and solubilizes phosphates,which improve plant fitness.This was evidenced by a 28%increase in photosynthetic pigments in T.latifolia plants colonized with N.fischeri.Additionally,N.fischeri inhibits the growth of important phytopathogens from the Fusarium genus.These findings highlight the important role of N.fischeri in enhancing the fitness and resilience of T.latifolia in hostile environments,demonstrating the potential of N.fischeri-T.latifolia association for the bioremediation of contaminated sites. 展开更多
关键词 Neosartorya fischeri Endophytic fungi Heavy metals contamination Cadmium Typha latifolia Bioremediation
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The Tianshan Mountains as a biogeographic barrier driving North-South divergence and local adaptation in Typha laxmannii 认领 引用
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作者 Chichi Zhao Lei Huang +1 位作者 Huijun Wang Xinwei Xu 《Plant Diversity》 SCIE CAS CSCD 2026年第4期720-733,共14页
The Tianshan Mountains constitute a major biogeographic barrier in Arid Central Asia,yet their impact on plant genomic divergence and adaptation remains poorly understood.Using Typha laxmannii,a wetland species distri... The Tianshan Mountains constitute a major biogeographic barrier in Arid Central Asia,yet their impact on plant genomic divergence and adaptation remains poorly understood.Using Typha laxmannii,a wetland species distributed across this range,we generated a chromosome-scale genome and performed integrated population genomic and environmental analyses of 126 individuals from 31 sites.Our results revealed a clear north–south genetic split demarcated by the Tianshan Mountains,with gene flowrestricted since divergence approximately 88.1 thousand years ago(Kya),a pattern further reinforced by post-Pleistocene demographic contraction.Northern and southern populations evolved distinct adaptive signatures in response to their local environments,including differentiation in genes associated with stress response,transcriptional regulation,and flowering time.Beyond single loci,adaptation also acts on large genomic blocks:a~2.5 Mb parallel sweep(~91 Kya)contains a linked block of stress-response genes shared across the species,suggesting a range-wide response to intensified continentality and repeated glacial–interglacial aridificationfollowing population decline(~100 Kya)but preceding the north–south split.In contrast,a~3 Mb divergent sweep(~85 Kya)harbours northernspecificalleles related to glutathione metabolism,zeatin biosynthesis,and transcriptional regulation,likely enhancing tolerance to extreme winter cooling and freeze–thaw cycles under a strengthened Siberian High after divergence.Together,our findingsestablish a“spatio-temporal environmental sorting”model of biodiversity,providing a critical framework for understanding how the topography and climate of the Arid Central Asian mountains promote evolutionary novelty and safeguard genetic resilience in the face of ongoing global climate change. 展开更多
关键词 Tianshan Mountains Typha laxmannii Local adaptation Biogeographic barrier Genomic divergence Environmental gradient
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The telomere-to-telomere genome of Pucai(蒲菜)(Typha angustifolia L.):a distinctive semiaquatic vegetable with lignin and chlorophyll as quality characteristics 认领 引用
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作者 Ya-Peng Li Li-Yao Su +5 位作者 Ting Huang Hui Liu Shan-Shan Tan Yuan-Jie Deng Ya-Hui Wang Ai-Sheng Xiong 《Horticulture Research》 SCIE CSCD 2025年第7期1-14,共14页
Pucai(graphic)(Typha angustifolia L.),within the Typha spp.,is a distinctive semiaquatic vegetable.Lignin and chlorophyll are two crucial traits and quality indicators for Pucai.In this study,we assembled a 207.00-Mb ... Pucai(graphic)(Typha angustifolia L.),within the Typha spp.,is a distinctive semiaquatic vegetable.Lignin and chlorophyll are two crucial traits and quality indicators for Pucai.In this study,we assembled a 207.00-Mb high-quality gapless genome of Pucai,telomere-to-telomere(T2T)level with a contig N50 length of 13.73 Mb.The most abundant type of repetitive sequence,comprising 16.98%of the genome,is the long terminal repeat retrotransposons(LTR-RT).A total of 30 telomeres and 15 centromeric regions were predicted.Gene families related to lignin,chlorophyll biosynthesis,and disease resistance were greatly expanded,which played important roles in the adaptation of Pucai to wetlands.The slow evolution of Pucai was indicated by theσwhole-genome duplication(WGD)-associated Ks peaks from different Poales and the low activity of recent LTR-RT in Pucai.Meanwhile,we found a unique WGD event in Typhaceae.A statistical analysis and annotation of genomic variations were conducted in interspecies and intraspecies of Typha.Based on the T2T genome,we constructed lignin and chlorophyll metabolic pathways of Pucai.Subsequently,the candidate structural genes and transcription factors that regulate lignin and chlorophyll biosynthesis were identified.The T2T genomic resources will provide molecular information for lignin and chlorophyll accumulation and help to understand genome evolution in Pucai. 展开更多
关键词 lignin chlorophyll contig n Typha angustifolia long terminal repeat retrotransposons ltr rt centromeric regions pucai graphic typha angustifolia telomere telomere genome
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Phragmites australis and Typha orientalis in removal of pollutant in Taihu Lake, China 认领 引用 被引量：5
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作者 TIAN Ziqiang ZHENG Binghui +1 位作者 LIU Meizhen ZHANG Zhenyu 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第4期440-446,共7页
Two plant populations of Phragmites australis and Typha orientalis grown in gravel and sediment substrate were studied to assess their capabilities for purifying polluted water in Taihu Lake, China. The substrate disp... Two plant populations of Phragmites australis and Typha orientalis grown in gravel and sediment substrate were studied to assess their capabilities for purifying polluted water in Taihu Lake, China. The substrate displayed most significant effects on the suspended matter （P 〈 0.01）, with the reduction of 76%-87% and 52%--63% for P. australis, and 83%-86% and 45%-62% for T. orientalis in gravel substrate and sediment substrate, respectively. Both species and substrates significantly decreased the N and P concentrations of water body （P 〈 0.01）. P. australis showed higher total N and P concentrations in tissues than T. orientalis and had a greater potential to remove nutrients from the lake. Phosphate was easily to concentrate in the belowground tissues, while nitrate concentration was higher in leaf and stalk. Therefore, harvesting the aboveground tissues could take most of nitrate out of the sediment. The saturate photosynthetic rate （Asat） of P. australis was higher than that of T. orientalis when grown in sediment substrate. But instance water-use- efficiency （WUEi） （A/E） and intrinsic water use efficiency （A/gs） showed the maximum values of two species grown in river water. With significant difference in gs, however, intercellular CO2 concentration （Ci） had no obvious difference in two species which indicated that high Asat value of P. australis might result from the increased carboxylation capacity of the mesophyll, because of the central role of N in photosynthetic enzymes. Our findings suggest that the plants could absorb most of nitrogen in polluted water, while gravel displayed a high capacity for absorbing the suspended matters and phosphate salts. Therefore, biological and physiological pathways for pollutant removal should be integrated. 展开更多
关键词 Phragmites australis Typha orientalis nutrient removal gas exchange Taihu Lake
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Two new nonacosanetriols from the pollen of Typha angustifolia 认领 引用 被引量：2
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作者 Tao, Wei Wei Yang, Nian Yun +4 位作者 Duan, Jin Ao Wu, De Kang Shang, Er Xin Qian, Da Wei Tang, Yu Ping 《Chinese Chemical Letters》 SCIE CAS 2010年第2期209-212,共4页
Chemical investigation of the pollen of Typha angustifolia Linn.has led to the isolation of two new nonacosanetriols,7,8,10- nonacosanetriol(1) and 7,9,10-nonacosanetriol(2).Their structures were elucidated by chemica... Chemical investigation of the pollen of Typha angustifolia Linn.has led to the isolation of two new nonacosanetriols,7,8,10- nonacosanetriol(1) and 7,9,10-nonacosanetriol(2).Their structures were elucidated by chemical reaction and spectral analysis. Compounds 1 and 2 exhibited weak activity of antiplatelet aggregation in vitro. 展开更多
关键词 Typha angustifolia Nonacosanetriol Antiplatelet aggregation
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Green Composite Material Made from Typha latifolia Fibres Bonded with an Epoxidized Linseed Oil/Tall Oil-Based Polyamide Binder System 认领 引用 被引量：3
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作者 Günter Wuzella Arunjunai Raj Mahendran Andreas Kandelbauer 《Journal of Renewable Materials》 SCIE EI CAS 2020年第5期499-512,共14页
Here,we report the mechanical and water sorption properties of a green composite based on Typha latifolia fibres.The composite was prepared either completely binder-less or bonded with 10%(w/w)of a bio-based resin whi... Here,we report the mechanical and water sorption properties of a green composite based on Typha latifolia fibres.The composite was prepared either completely binder-less or bonded with 10%(w/w)of a bio-based resin which was a mixture of an epoxidized linseed oil and a tall-oil based polyamide.The flexural modulus of elasticity,the flexural strength and the water absorption of hot pressed Typha panels were measured and the influence of pressing time and panel density on these properties was investigated.The cure kinetics of the biobased resin was analyzed by differential scanning calorimetry(DSC)in combination with the iso-conversional kinetic analysis method of Vyazovkin to derive the curing conditions required for achieving completely cured resin.For the binderless Typha panels the best technological properties were achieved for panels with high density.By adding 10%of the binder resin the flexural strength and especially the water absorption were improved significantly. 展开更多
关键词 Natural fibre composite Cattails Typha latifolia epoxidized linseed oil cure kinetics iso-conversional kinetic analysis
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Effects of silver nanoparticles on resistance characteristics of the wetland plant Typha orientalis in a hydroponic system 认领 引用 被引量：2
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作者 Ma Yixuan Huang Juan +3 位作者 Cao Chong Cai Wenshu Xiao Jun Yan Chunni 《Journal of Southeast University(English Edition)》 EI CAS 2019年第3期381-388,共8页
To probe the influence and the adverse-resistance characteristics of wetland plants in presence of silver nanoparticles (AgNPs), the changes in the physiological and biochemical characteristics (including the superoxi... To probe the influence and the adverse-resistance characteristics of wetland plants in presence of silver nanoparticles (AgNPs), the changes in the physiological and biochemical characteristics (including the superoxide dismutase (SOD) activity, catalase (CAT) activity, peroxidase (POD) activity, soluble protein content, and chlorophyll content) of Typha orientalis exposed to different concentrations of AgNPs solutions (0, 0.1, 1, 20 and 40 mg/L) were explored. Meantime, the accumulation of silver content in these plants was revealed. The results show that under low concentrations of AgNPs, the SOD and POD activities in the leaves of Typha orientalis are strengthened to different degrees. However, high concentrations of AgNPs inhibit the activities of SOD and POD. Under the stress of different concentrations of AgNPs, the CAT activities are inhibited initially and later recovered to some extent. Under the stress of low concentrations of AgNPs, the soluble protein content in the leaves of Typha orientalis increases significantly, but decreases more significantly with increasing concentrations of AgNPs. Low concentrations of AgNPs promote chlorophyll synthesis in the leaves of Typha orientalis , but the chlorophyll content subsequently falls to pre-stress levels. In contrast, high concentrations of AgNPs cause a certain inhibition to generate chlorophyll. Meanwhile, the results show that the silver concentrations of plant tissues increase with the exposure of concentrations of AgNPs and they have a positive relationship with the exposure of concentrations of AgNPs. 展开更多
关键词 silver nanoparticles (AgNPs) wetland plants Typha orientalis physiological and biochemical characteristics antioxidase
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Distribution characteristics of ammonia-oxidizing bacteria in the Typha latifolia constructed wetlands using fluorescent in situ hybridization(FISH) 认领 引用 被引量：1
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作者 YAN Li Ryuhei Inamori +4 位作者 GUI Ping XU Kai-qin KONG Hai-nan Masatoshi Matsurnura Yuhei Inamori 《Journal of Environmental Sciences》 SCIE EI CAS 2005年第6期993-997,共5页
A molecular biology method, fluorescent in situ hybridization（FISH）, in which the pre-treatment was improved in allusion to the media of the constructed wetlands（CW）, e.g. the soil and the grit, was used to invest... A molecular biology method, fluorescent in situ hybridization（FISH）, in which the pre-treatment was improved in allusion to the media of the constructed wetlands（CW）, e.g. the soil and the grit, was used to investigate the vertical distribution characteristics of ammonia-oxidizing bacteria（AOB） quantity and the relation with oxidation-reduction potential（ORP） in the Typha latifolia constructed wetlands under three different Ioadings in summer from May to September. Results showed that the quantity of the AOB decreased in the Typha latifolia CW with the increase of vertical depth. However, the AOB quantity was 2-4 times the quantity of the control in the root area. Additionally, ORP in the rhizosphere was found to be higher than other areas, which showed that Typha latifolia CW was in an aerobic state in summer when using simulated non-point sewage at the rural area of Taihu Lake in China and small town combined sewage. 展开更多
关键词 constructed wetland（CW） fluorescent in situ hybridization（FISH） ammonia-oxidizing bacteria （AOB） Typha/atifo/ia（cattail）
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Ethanolic extract of Puhuang(Pollen Typhae) modulates lipopolysaccharide-induced inflammatory response through inducible nitric oxide synthase/cyclooxygenase-2 signaling in RAW 264.7 macrophages 认领 引用 被引量：5
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作者 CHEN Tzufan CHEN Chuntzu +3 位作者 HUANG Yuanli BASKARAN Rathinasamy TSAI Jeffrey J.P. HU Rouhmei 《Journal of Traditional Chinese Medicine》 SCIE CSCD 2021年第6期836-844,共9页
OBJECTIVE:To evaluate the immune modulatory response of Puhuang(Pollen Typhae),ethanolic extract of dried pollens(TP-E)and charcoal activated pollens(CTP-E)were used for their phytochemical evaluation and their modula... OBJECTIVE:To evaluate the immune modulatory response of Puhuang(Pollen Typhae),ethanolic extract of dried pollens(TP-E)and charcoal activated pollens(CTP-E)were used for their phytochemical evaluation and their modulatory response against lipopolysaccharide(LPS)induced inflammatory activity on RAW264.7 macrophage cells.METHODS:Biochemical assays were carried out to quantify the 1,1-Diphenyl-2-picrylhydrazyl Radical Scavenging Activity,Reducing Power,Ferrous ion chelating ability and total polyphenol content and flavonoids.Non-toxic dose of the extract(TP-E and CTP-E)was chosen based on 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay.Effect of TP-E and CTP-E on lipopolysaccharides-induced inducible nitric oxide synthase(iNOS)and cyclooxygenase-2(COX-2)expression was measured by Western blot and quantitative PCR(q RT-PCR).Expression of inflammatory cytokines,such as interleukins(IL-1βand IL-6)and tumor necrosis factorα(TNF-α),was quantified using q RT-PCR.Mitogen-activated protein kinase pathway was analyzed using Western blot.RESULTS:Phytochemical analysis revealed that both TP-E and CTP-E have strong antioxidant activities and high flavonoid and phenolic contents.TP-E and CTP-E effectively inhibit the expression of i NOS and COX-2,thereby inhibiting its downstream proinflammatory regulators,the extracellular signal-related kinase-1/2,that decreases the expression of IL-1β,IL-6 and TNF-α.CONCLUSION:Phytochemical constituents present in Typha angustifolia Linn could be used for treating inflammation-related diseases. 展开更多
关键词 Typha angustifolia lipopolysaccharides inflammation NF-kappa B mitogen-activated protein kinases
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Synchrotron micro-scale measurement of metal distributions in Phragmites australis and Typha latifolia root tissue from an urban brownfield site 认领 引用 被引量：3
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作者 Huan Feng Yu Qian +5 位作者 Frank J.Gallagher Weiguo Zhang Lizhong Yu Changjun Liu Keith W.Jones Ryan Tappero 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第3期172-182,共11页
Liberty State Park in New Jersey,USA,is a ＂brownfield＂ site containing various levels of contaminants.To investigate metal uptake and distributions in plants on the brownfield site,Phragmites australis and Typha lat... Liberty State Park in New Jersey,USA,is a ＂brownfield＂ site containing various levels of contaminants.To investigate metal uptake and distributions in plants on the brownfield site,Phragmites australis and Typha latifolia were collected in Liberty State Park during the growing season（May–September）in 2011 at two sites with the high and low metal loads,respectively.The objective of this study was to understand the metal（Fe,Mn,Cu,Pb and Zn）concentration and spatial distributions in P.australis and T.latifolia root systems with micro-meter scale resolution using synchrotron X-ray microfluorescence（μXRF）and synchrotron X-ray computed microtomography（μCMT）techniques.The root structure measurement by synchrotron μCMT showed that high X-ray attenuation substance appeared in the epidermis.Synchrotron μXRF measurement showed that metal concentrations and distributions in the root cross-section between epidermis and vascular tissue were statistically different.Significant correlations were found between metals（Cu,Mn,Pb and Zn）and Fe in the epidermis,implying that metals were scavenged by Fe oxides.The results from this study suggest that the expression of metal transport and accumulation within the root systems may be element specific.The information derived from this study can improve our current knowledge of the wetland plant ecological function in brownfield remediation. 展开更多
关键词 Phragmites australis Typha latifolia Trace metals Synchrotron radiation technique Brownfield
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Metals and metalloid bioconcentrations in the tissues of Typha latifolia grown in the four interconnected ponds of a domestic landfill site 认领 引用 被引量：1
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作者 Zohra Ben Salem Xavier Laffray +2 位作者 Ahmed Al-Ashoor Habib Ayadi Lotfi Aleya 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第4期56-68,共13页
The uptake of metals in roots and their transfer to rhizomes and above-ground plant parts（stems, leaves） of cattails（Typha latifolia L.） were studied in leachates from a domestic landfill site（Etueffont, France）... The uptake of metals in roots and their transfer to rhizomes and above-ground plant parts（stems, leaves） of cattails（Typha latifolia L.） were studied in leachates from a domestic landfill site（Etueffont, France） and treated in a natural lagooning system. Plant parts and corresponding water and sediment samples were taken at the inflow and outflow points of the four ponds at the beginning and at the end of the growing season. Concentrations of As, Cd, Cr, Cu, Fe, Mn, Ni and Zn in the different compartments were estimated and their removal efficiency assessed, reaching more than 90% for Fe, Mn and Ni in spring and fall as well in the water compartment. The above-and below-ground cattail biomass varied from 0.21 to 0.85, and 0.34 to 1.24 kg dry weight/m^2, respectively, the highest values being recorded in the fourth pond in spring 2011. The root system was the first site of accumulation before the rhizome, stem and leaves. The highest metal concentration was observed in roots from cattails growing at the inflow of the system＇s first pond. The trend in the average trace element concentrations in the cattail plant organs can generally be expressed as： Fe 〉 Mn 〉 As 〉 Zn 〉 Cr 〉 Cu 〉 Ni 〉 Cd for both spring and fall. While T. latifolia removes trace elements efficiently from landfill leachates, attention should also be paid to the negative effects of these elements on plant growth. 展开更多
关键词 Landfill leachate Lagooning Trace elements Typha latifolia Phytoremediation
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东方香蒲(Typha orientalis Presl)对重度污染土壤中As、Cd、Pb的耐性与累积特征 认领 引用 被引量：31
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作者 王凤永 郭朝晖 +1 位作者 苗旭峰 肖细元 《农业环境科学学报》 CAS CSCD 北大核心 2011年第10期1966-1971,共6页
通过温室盆栽试验研究东方香蒲对重度污染土壤中As、Cd、Pb的耐受性能与累积特征。研究结果表明,与未污染土壤处理相比,当土壤中As、Cd、Pb含量分别达到48.4、16.9mg·kg-1和316mg·kg-1时,东方香蒲生物量、叶绿素含量和过氧化... 通过温室盆栽试验研究东方香蒲对重度污染土壤中As、Cd、Pb的耐受性能与累积特征。研究结果表明,与未污染土壤处理相比,当土壤中As、Cd、Pb含量分别达到48.4、16.9mg·kg-1和316mg·kg-1时,东方香蒲生物量、叶绿素含量和过氧化氢酶活性等均无显著降低,东方香蒲对土壤中As、Cd、Pb表现了较强的耐受性能;当土壤中As、Cd、Pb含量分别达到285、42.1、1008mg·kg-1时,东方香蒲生物量、叶绿素含量和过氧化氢酶活性等均明显下降(P<0.05),表现出植株矮小、叶片枯黄等中毒症状。东方香蒲对土壤中As、Cd、Pb的累积主要在根部,其含量分别可达31.69、35.12mg·kg-1和87.12mg·kg-1,而在茎叶中仅为2.06、2.83mg·kg-1和20.18mg·kg-1,根部向地上部转移系数小。研究结果表明,东方香蒲可作为As、Cd、Pb重度污染土壤植物稳定修复的潜在目标植物之一。 展开更多
关键词 重金属 东方香蒲 叶绿素含量 过氧化氢酶活性 植物稳定修复
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冬、春季芦苇(Phragmites australis)和狭叶香蒲(Typha angustifolia)的腐解过程及其对水质的影响 认领 引用 被引量：21
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作者 戚美侠 王红萍 陈杰 《湖泊科学》 EI CAS CSCD 北大核心 2017年第2期420-429,共10页
水生植物修复已经成为水体富营养化修复的重要手段,但其周期性的衰亡也给水体带来不容忽视的负效应.以府河流域丘陵地带农业区小水系自然生长的芦苇(Phragmites australis)和狭叶香蒲(Typha angustifolia)为研究对象,通过模拟实验,研究... 水生植物修复已经成为水体富营养化修复的重要手段,但其周期性的衰亡也给水体带来不容忽视的负效应.以府河流域丘陵地带农业区小水系自然生长的芦苇(Phragmites australis)和狭叶香蒲(Typha angustifolia)为研究对象,通过模拟实验,研究其冬季和春季腐烂分解过程的差异以及对水体营养盐水平的影响.结果表明,2种挺水植物的剩余干物质量整体上都呈现先快速下降再缓慢下降的趋势,芦苇和狭叶香蒲春季的分解速率分别为0.0251和0.0169 d-1,分别明显高于冬季分解速率(0.0027和0.0052 d-1);且腐烂分解速率与植物初始氮磷含量和氮磷比都有一定相关性.2种植物在冬季和春季磷的矿化速率都明显高于氮的矿化速率.实验水体的总氮和总磷浓度在腐解过程呈现初期迅速上升、中期迅速下降、后期缓慢下降的趋势.总体来看,芦苇和狭叶香蒲的腐烂分解受季节和初始氮磷浓度的影响较大,芦苇反应较香蒲更敏感且对水质的影响具有时效性. 展开更多
关键词 芦苇 狭叶香蒲 腐烂分解 营养盐 矿化速率 水质
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东方香蒲(Typha orientalis Presl)对铅的富集特征及其EDTA效应分析 认领 引用 被引量：34
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作者 李永丽 李欣 +3 位作者 李硕 王显海 樊霆 刘云国 《生态环境》 2005年第4期555-558,共4页
通过野外调查和水培试验,研究了生长在永州铅锌铜尾矿上的优势植物东方香蒲(TyphaorientalisPresl)对铅的富集特征及EDTA对其吸收和运输铅的影响。野外调查表明,东方香蒲对铅有很强的富集作用,其地上部分铅平均质量分数为619mg/kg,地下... 通过野外调查和水培试验,研究了生长在永州铅锌铜尾矿上的优势植物东方香蒲(TyphaorientalisPresl)对铅的富集特征及EDTA对其吸收和运输铅的影响。野外调查表明,东方香蒲对铅有很强的富集作用,其地上部分铅平均质量分数为619mg/kg,地下部分铅平均质量分数为1233mg/kg。营养液培养试验进一步证实了它的强富集能力,其地上和地下部分的铅质量分数都远远超过了超富集定义的参考值(1000mg/kg)。分析结果表明,东方香蒲是一种新的铅富集型植物,EDTA的加入不仅增加了植株对铅的吸收量,而且增大了铅在植株体内的转运系数。同时,铅对植株的毒害症状也得到缓解。 展开更多
关键词 铅 富集 东方香蒲 植物修复 EDTA
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铅锌矿废水中重金属在宽叶香蒲(Typha latifolia)的积累与分布 认领 引用 被引量：21
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作者 叶志鸿 陈桂珠 +1 位作者 蓝崇钰 李柳川 《植物生态学与地植物学学报》 北大核心 1992年第1期72-79,共8页
本文通过对净化塘系统和对照点的水、土和宽叶香蒲组织的分析结果指出:宽叶香蒲具有较强的忍耐、吸收和积累Pb、Zn等重金属的能力。Pb、Zn等重金属在宽叶香蒲体内的积累数量与分布规律是根>地下茎>叶;老地下茎>嫩地下茎;Pb在... 本文通过对净化塘系统和对照点的水、土和宽叶香蒲组织的分析结果指出:宽叶香蒲具有较强的忍耐、吸收和积累Pb、Zn等重金属的能力。Pb、Zn等重金属在宽叶香蒲体内的积累数量与分布规律是根>地下茎>叶;老地下茎>嫩地下茎;Pb在叶的分布是老叶>成熟叶>嫩叶。在净化塘系统内,各种重金属在宽叶香蒲根部积累比例最大的是Pb,其次是Zn、Cu、Cd、Ni、Mn。 展开更多
关键词 宽叶香蒲 铅锌矿废水 重金属 积累
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Optimization and Characterization of Combined Degumming Process of Typha angustata L. Stem Fibers 认领 引用
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作者 Sana Rezig Foued Khoffi +2 位作者 Mounir Jaouadi Asma Eloudiani Slah Msahli 《Journal of Renewable Materials》 EI CAS 2024年第6期1071-1086,共16页
Plant derived natural fibers have been widely investigated as alternatives to synthetic fibers in reinforcing polymers.Researchers over the years have explored many plant fibers using different extraction processes to... Plant derived natural fibers have been widely investigated as alternatives to synthetic fibers in reinforcing polymers.Researchers over the years have explored many plant fibers using different extraction processes to study their physical,chemical,and mechanical properties.In this context,the present study relates to the extraction,characterization,and optimization of Typha angustata L.stem fibers.For this purpose,desirability functions and response surface methodology were applied to simultaneously optimize the diameter(D),linear density(LD);yield(Y),lignin fraction(L),and tenacity(T)of Typha stem fibers.Typha stems have been subjected to both alkali(NaOH)and enzymatic(pectinex ultra-SPL)treatments.Three levels of process variables including enzyme concentration(10,15,and 20 ml/L)and treatment duration(10,15,and 20 days)were used to design the experiments according to the factorial design.Experimental results were examined by analysis of variance and fitted to second order polynomial model using multiple regression analysis.The Derringer’s desirability function released that the values of process variables generating optimized diameter,linear density,yield,lignin ratio and tenacity are 20 ml/L and 20 days for concentration of pectinex ultra-SPL enzyme and treatment duration,respectively.Confirmation was performed and high degree of correlation was found between the experimental and statistical values.Moreover,the morphological structure has been investigated by the scanning electron microscope,showing a crenelated structure of ultimate fiber bundles of cellulose composing the Typha fiber.Compared to Typha stem non-treated fibers(TSNTF),Typha stem combined treated fibers(TSCTF),brings to improve mechanical properties.This change in mechanical properties is affected by modifying the fiber structure showing alpha cellulose of(66.86%)and lignin ratio of(10.83%)with a crystallinity index of(58.47%). 展开更多
关键词 Typha angustata L.stems fibers combined treatment optimization process desirability function chemical and physical properties morphological structure
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Effects of Chemical Treatment on the Physical Properties of Typha 认领 引用
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作者 Ibrahima Diaw Mactar Faye +1 位作者 Seckou Bodian Vincent Sambou 《Fluid Dynamics & Materials Processing》 EI 2022年第5期1409-1418,共10页
Plant-based concretes are produced from plant aggregates and a binder.Plant fibers are mainly composed of saccharides(sugars)and these sugars can decrease the concentration of Ca2+ions in the cement pore solution and ... Plant-based concretes are produced from plant aggregates and a binder.Plant fibers are mainly composed of saccharides(sugars)and these sugars can decrease the concentration of Ca2+ions in the cement pore solution and delay the formation of hydration products.To improve the interfacial bond between fibers and matrix a chemical treatment is widely used.This study investigates the effect of sodium hydroxide treatment on physical and hygroscopic properties of Typha aggregates.In particular,a 5%sodium hydroxide solution is used to treat these aggregates and their bulk and absolute densities,porosity,water content and water absorption are evaluated accordingly.Results indicate that bulk and absolute densities increase after treatment from 56.44 kg/m3 to 122.57 kg/m3 and 541.93 kg/m3 to 555.17 kg/m3,respectively.NaOH treatment reduces porosity of Typha from 89.58%to 77.92%and decreases water content from 1.4%to 1%.The treatment with sodium hydroxide reduces substantially the water absorption of the aggregates. 展开更多
关键词 Sodium hydroxide treatment typha aggregates hygroscopic properties physical properties
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Comparative study of epiphytic algal communities on Typha latifolia L.and Phragmites australis(Cav.)Trin.ex Steud in the shallow Gala Lake(European Part of Turkey) 认领 引用
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作者 OTERLER Burak 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第5期1615-1628,共14页
The aim of this study was to determine the species composition, biodiversity and, relative abundance of epiphytic algae and their relationship with environmental variables on Typha latifolia and Phragmites australis a... The aim of this study was to determine the species composition, biodiversity and, relative abundance of epiphytic algae and their relationship with environmental variables on Typha latifolia and Phragmites australis at Lake Gala(National Park). Epiphytic algae were gathered monthly by collecting aquatic plants between March 2014 and November 2014. In the epiphytic flora were a total of 133 taxa were identified, 107 taxa were identified on T. latifolia and 96 were discovered on P. australis. While the mean species richness, species diversity and evenness values of the algae identified on T. latifolia were 46, 1.85 and 0.51 respectively, these values were respectively 43, 1.51 and 0.43 on P. australis. While diatoms were generally dominant, other dominant groups in the epiphytic flora included green algae and blue-green algae. The algae that had the highest relative biovolume on T. latifolia were Spirogyra affinis, Oscillatoria sancta and Gomphonema acuminatum, while the algae that had the highest relative biovolume on P. australis were E pithemia adnata, Oscillatoria sancta and R hopalodia gibba. Results show that species composition of epiphytic algae was different, but diversity values were similar on all the macrophytes. The hydrological pulse is one of the most important factors determining the physical and chemical environment of the epiphytic algal community. It was found that some environmental factors were highly eff ective on community distribution in the epiphyton. Additionally, it was observed that some epiphytic algae species had a substrate preference between T. latifolia and P. australis. 展开更多
关键词 community structure epiphytic algae shallow lake Typha latifolia Phragmites australis
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PURIFICATION AND PARTIAL CHARACTERIZATION OF POLYSACCHARIDES FROM THE POLLEN OF TYPHA ANGUSTIFILIA L. 认领 引用 被引量：1
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作者 Ping MIAO Sheng JIN Department of Chemistry Peking University Beijing 100871 《Chinese Chemical Letters》 SCIE CAS 1990年第1期21-22,共2页
Three polysaccharides TAA,TAB and TAC were purified from the pollen of Typha An- gustifilia L..TAA is mainly composed of α-L-arabinofuranose,β—D—galactose and α—D—galac- turonic acid.TAB and TAC contain the bac... Three polysaccharides TAA,TAB and TAC were purified from the pollen of Typha An- gustifilia L..TAA is mainly composed of α-L-arabinofuranose,β—D—galactose and α—D—galac- turonic acid.TAB and TAC contain the backbone mainly composed of (1→5)—linked—L—arabi- nosyl residue. 展开更多
关键词 PURIFICATION AND PARTIAL CHARACTERIZATION OF POLYSACCHARIDES FROM THE POLLEN OF TYPHA ANGUSTIFILIA L Res TAA GLC DEAE
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Thermophysical Characterization of Typha’s Concrete for Its Integration into Construction 认领 引用 被引量：1
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作者 Ababacar Sadikh Diaw Harouna Mamadou Bal +3 位作者 Oumar Diallo Mamadou Babacar Ndiaye Mamadou Wade Salif Gaye 《Journal of Building Construction and Planning Research》 2021年第1期56-65,共10页
Energy consumption in the building sector is constantly increasing and represents more than 44% in the residential and tertiary sectors in many countries [1]. Thus, the building represents a real possibility of energy... Energy consumption in the building sector is constantly increasing and represents more than 44% in the residential and tertiary sectors in many countries [1]. Thus, the building represents a real possibility of energy saving and is the subject of several studies particularly in actual context of experimentation with materials based on plant fibers (hemp, flax, millet wastage, etc.). These biobased materials such as typha have shown real interest in the buildings construction due to their light and porous nature. It’s in this context that we were interested in typha australis mixed with classic aggregates (cement, sand, gravel 3/8) to make typha’s concrete. On this concrete, we carried out experimental measurements in order to better understand its contributions in the building. The interesting results obtained show that typha australis, which is an invasive and harmful grass, can be valued and integrated among local building materials in the form of typha’s concrete in order to improve the energy efficiency of buildings. 展开更多
关键词 Typha Australis Bio-Based Materials Thermal Conductivity Thermal Diffusivity Energy Efficiency Asymmetric Hot Plane
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