【摘 要】
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Salt stress negatively affects plant growth,and the fungal endophyte Epichlo(e)gansuensis increases the tolerance of its host grass species,Achnatherum inebrian
【机 构】
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State Key Laboratory of Grassland Agro-ecosystems;Center for Grassland Microbiome;Key Laboratory of
论文部分内容阅读
Salt stress negatively affects plant growth,and the fungal endophyte Epichlo(e)gansuensis increases the tolerance of its host grass species,Achnatherum inebrians,to abiotic stresses.In this work,we first evaluated the effects ofE.gansuensis on glucose-6-phosphate dehydrogenase (G6PDH) and plasma membrane (PM) H+-ATPase activity of Achnatherum inebrians plants under varying NaC1 concentrations.Our results showed that the presence of E.gansuensis increased G6PDH,PM H+-ATPase,superoxide dismutase and catalase activity to decrease O2·-,H2O2 and Na+ contents in A.inebrians under NaC1 stress,resulting in enhanced salt tolerance.In addition,the PM NADPH oxidase activity and NADPH/NADP+ ratios were all lower in A.inebrians with E.ganusensis plants than A.inebrians plants without this endophyte under NaC1 stress.In conclusion,E.gansuensis has a positive role in improving host grass yield under NaC1 stress by enhancing the activity of G6PDH and PM H+-ATPase to decrease ROS content.This provides a new way for the selection of stress-resistant and high-quality forage varieties by the use of systemic fungal endophytes.
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