The eff ect of Rhizophagus irregularis on salt stress tolerance of Elaeagnus angustifolia roots  

作　　者：Wenyuan He Xiaoxu Fan Zixin Zhou Huanhuan Zhang Xiang Gao Fuqiang Song Gui Geng 

机构地区：[1]Engineering Research Center of Agricultural Microbiology Technology,Ministry of Education,Heilongjiang University,Harbin 150080,China [2]Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region,School of Life Sciences,Heilongjiang University,Harbin 150080,China

出　　处：《Journal of Forestry Research》2020年第6期2063-2073,共11页林业研究（英文版）

基　　金：This work was supported by Key Laboratory of Microbiology,College of Heilongjiang Province.We would also like to thank Elizabeth Tokarz at the Yale University for her assistance with English language and grammatical editing of the manuscript.

摘　　要：We assessed the eff ects of arbuscular mycorrhizal fungi(AMF)Rhizophagus irregularis inoculation on salt stress tolerance in roots of the drought-tolerant plant Elaeagnus angustifolia.We studied a plant growth index,spore density and hyphal length density of AMF,the Na+contents and ultrastructure of root cells,as well as rhizosphere soil enzyme activities of mycorrhizal and non-mycorrhizal E.angustifolia seedlings under diff erent salt stress.Under salt stress,growth of E.angustifolia with mycorrhizal inoculation was higher than that of non-inoculated treatments.The spore density and hyphal length density decreased signifi cantly under salt stress in rhizosphere soil of mycorrhizal E.angustifolia seedlings(p<0.05).The root cells of E.angustifolia seedlings inoculated with R.irregularis at 300 mmol L−1 salt had more organelles,greater integrity,and lower root Na+contents than those of non-inoculated seedlings.In addition,the results showed notably higher activities of catalase,phosphatase,urease and saccharase in rhizosphere soil of the mycorrhizal seedlings in response to salinity compared to those of the non-mycorrhizal seedlings.Therefore,AMF inoculation could enhance salt stress tolerance in roots of E.angustifolia.

关 键 词：Salt stress Arbuscular mycorrhizal fungi Elaeagnus angustifolia Na+content Ultrastructure of root cell Soil enzyme 

分 类 号：S793.9[农业科学—林木遗传育种]