生态学杂志2017，Vol.36Issue(10)：2734-2743,10.DOI:10.13292/j.1000-4890.201710.002
荒漠和草原生态系统丛枝菌根真菌多样性和群落结构
Diversity and community structure of arbuscular mycorrhizal fungi in desert and steppe ecosystems
摘要
Abstract
Arbuscular mycorrhizal fungi (AMF) are ubiquitous soil fungi in natural and agricultural ecosystems,which can form symbiotic associations with the majority of terrestrial plants and have important ecological functions.To compare the AMF communities between desert and steppe ecosystems,and to reveal the key influencing factors for AMF diversity,we collected rhizosphere soil samples from both zonal and non-zonal desert and steppe in Inner Mongolia,Gansu and Qinghai provinces,China.The community structure of the soil AMF was investigated using Illumina Miseq sequencing platform.In total,159 AMF operational taxonomic units (OTUs) were detected,belonging to 1 class,3 orders,5 families and 8 genera,among which,Glomus was the dominant genus in both desert and steppe ecosystems.The AMF richness,Shannon diversity,phylogenetic diversity in steppe was higher than those in desert (both zonal and non-zonal vegetation regions).A remarkable difference in AMF community structure between desert and steppe ecosystems was noted in zonal vegetation region.However,there was no significant difference in AMF community structure between non-zonal desert and steppe.Correlation analysis clearly refleeted the relationship between environmental factors and AMF community structure and diversity,and variation partitioning showed that soil properties and climate factors were more important than plant community and geographic distance in determining AMF community structure.In summary,the soil AMF communities of desert and steppe were mainly shaped by soil properties and climate factors.This study provided support for the potential use of AMF for ecological control of grassland desertification.关键词
荒漠/草原/AMF/环境因子/群落结构Key words
desert/steppe/arbuscular mycorrhizal fungi (AMF)/environmental factors/community structure引用本文复制引用
李雪静,徐天乐,陈保冬,徐丽娇,赵爱花..荒漠和草原生态系统丛枝菌根真菌多样性和群落结构[J].生态学杂志,2017,36(10):2734-2743,10.基金项目
国家重点研发计划项目(2016YFC0500702)和国家自然科学基金项目(41371264)资助. （2016YFC0500702）
