Arbuscular mycorrhizal fungi in the rhizosphere soil of poisonous plants depressed the growth of pasture grasses in the Tibetan Plateau Alpine meadow  

作　　者：Xiaojuan Wang Qiang Wang Liang Jin Li Sun Qian Wang Liang Zhang Yinglong Chen 

机构地区：[1]Natural History Research Center,Shanghai Natural History Museum,Shanghai Science&Technology Museum,Shanghai,China [2]State Key Laboratory of Grassland Agro-Ecosystem,School of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou,China [3]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University,and Institute of Soil and Water Conservation,Chinese Academy of Sciences,Yangling,China [4]School of Earth and Environment,and The UWA Institute of Agriculture,The University of Western Australia,Perth,Australia

出　　处：《Ecosystem Health and Sustainability》2019年第1期226-236,I0006,共12页生态系统健康与可持续性（英文）

基　　金：TThis study was supported by National Natural Science Foundation of China(31270558);Natural Science Foundation of Shanghai(18ZR1425400);the Research Funds for the Introduction of Talents of Shanghai Science and Technology Museum.

摘　　要：In order to explore the influence of arbuscular mycorrhizal(AM)fungi in the rhizosphere of poisonous plants on the neighboring pasture grasses in the Tibetan Plateau Alpine meadow ecosystem,rhizosphere soils were collected from eight different poisonous plants in degraded grasslands and one from pasture grass in non-degraded grasslands(CK).The collected soils were used as inocula to assess the influence of indigenous AM fungi on the growth of two typical pasture grass species,Elymus nutans and Poa pratensis,in a bioassay experiment.Five growth parameters and two AM parameters were determined.The mycorrhizal responsiveness and the importance value were calculated.Significant differences between the eight poisonous plants and CK were observed.Compared to CK,rhizosphere soil from the eight poisonous plants had lower AM fungal spore densities.The growth of E.nutans and P.pratensis seedlings was depressed with the inoculation from poisonous plants rhizosphere soil.This study demonstrated that the presence of poisonous plants with grassland degradation altered inherent AM fungal community abundance,and could exert inhibition effects on the growth of pasture grasses.It may attribute to discover the important role of rhizosphere soil of different poisonous plants to AM fungal community on the Alpine meadow.

关 键 词：AM fungal spore common mycorrhizal networks degraded grassland DIVERSITY Elymus nutans Poa pratensis 

分 类 号：S15[农业科学—土壤学]