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盐胁迫下丛枝菌根真菌对玉米水分和养分状况的影响
引用本文:冯固,李晓林,张福锁,李生秀.盐胁迫下丛枝菌根真菌对玉米水分和养分状况的影响[J].应用生态学报,2000,11(4):595-598.
作者姓名:冯固  李晓林  张福锁  李生秀
作者单位:1. 新疆农业科学院核技术生物技术研究所,乌鲁木齐,830000
2. 中国农业大学植物营养系,北京100094
3. 西北农业大学资源与环境科学系,杨陵,712100
基金项目:国家自然科学基金资助项目!(39790 1 0 0和 49961 0 0 5)
摘    要:在NaCl胁迫下无论接种AM真菌与否玉米植株生物产量均减少,但不接种处理的减少幅度比较种处理的高10个百分点左右,盐胁迫下接种AM真菌的玉米根系和地上部的干重、叶片水热均高于不接种处理、叶片脯氨酸含量低于不接种处理,在盐胁迫下真菌菌丝对玉米植株营养的贡献由45.3%降为42.6%,AM真菌对植株生长的效应反而由30.9%提高到63.5%,说明AM真菌主米耐盐性的机理与改善植株的水分状况和P营养状况

关 键 词:AM真菌  盐胁迫  玉米  水分  磷营养  耐盐性  共生

Effect of AM fungi on water and nutrition status of corn plants under salt stress
FENG Gu,LI Xiaolin,ZHANG Fusuo,LI Shengxiu.Effect of AM fungi on water and nutrition status of corn plants under salt stress[J].Chinese Journal of Applied Ecology,2000,11(4):595-598.
Authors:FENG Gu  LI Xiaolin  ZHANG Fusuo  LI Shengxiu
Institution:Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences, Urumqi 830000.
Abstract:Under NaCl stress,the dry matter production of corn plants inoculated with or without arbuscular mycorrhizal (AM) fungus ( Glomus mosseae) was decreased,but the decrement for non mycorrhizal plants was 10% higher than that for mycorrhizal ones.Under salt stress condition,the dry weights of root system and aboveground part of mycorrhizal corn and its leaf water potential were higher than those of non mycorrhizal corn, while the proline content of mycorrhizal corn was less than that of non mycorrhizal corn.The contribution of hypha to P uptake of plants decreased from 45\^3% to 42\^6%,while the effect of AM fungi on plant growth increased from 30\^9% to 63\^5% under salt stress condition.The above mentioned results indicated that the mechanism that AM fungi enhance the salt resistance of corn is related with the improvements of water and P nutrition conditions.Meanwhile,it was found whether under salt stress or not,the ratio of P accumulation of root system to aboveground part of mycorrhizal corn was higher than that of non mycorrhizal corn,indicating that the infection of AM fungi changed the P distribution pattern in plant bodies,which is beneficial to increase the salt resistance of plants.
Keywords:Arbuscular mycorrhiza  Salt stress  Corn  Water  Phosphorus    
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