干旱区地理2024，Vol.47Issue(7)：1187-1198,12.DOI:10.12118/j.issn.1000-6060.2023.499
天山北部不同生境苜蓿根际土壤真菌分布特征及驱动因子
Distribution characteristics and driving factors of soil fungi between alfalfa roots in different habitats in northern Tianshan Mountains
摘要
Abstract
In agricultural ecosystems,rhizosphere microbial communities serve as the driving force for the suc-cessful cycling and transformation of nutrients and organic matter in soil,exerting a significant impact on the growth,health,and nutritional status of crops.To investigate the diversity of rhizosphere fungi in different habi-tats in the northern Tianshan Mountains and the driving factors behind their variations,this study employed high-throughput sequencing to analyze the diversity,structures,functions,and driving factors of rhizosphere and non-rhizosphere fungi in alfalfa rhizosphere soils in mountainous and plain habitats.The results revealed that:(1)Soil nitrogen,potassium,organic matter,and enzyme activity in the mountainous alfalfa rhizosphere soil were signifi-cantly higher than those in plain alfalfa rhizosphere soil,while electrical conductivity and pH were significantly lower than those in plain alfalfa rhizosphere soil.(2)Significant differences were observed in the fungal commu-nities in mountainous and plain soils,with the operational taxonomic units(OTUs),Chao1,and ACE indices of plain alfalfa rhizosphere soil being significantly higher than those of mountainous alfalfa rhizosphere soil;addi-tionally,the OTUs,Chao1,ACE,and Shannon indices showed significantly higher values in rhizosphere soils than those in non-rhizosphere soils.(3)The dominant fungal phyla in the region were Ascomycota,Mortierello-mycota,Basidiomycota,and Blastocladiomycota,with notable differences in their distribution across different habitats.(4)Based on FUNGuild's fungal functional predictions,pathogenic fungi in mountainous areas were sig-nificantly higher than those in plain areas,while arbuscular mycorrhizal fungi were significantly lower in moun-tainous areas.(5)Redundancy analysis and Mantel tests indicated that soil pH,total nitrogen,total potassium and available potassium were the main driving factors for the differential distribution of fungal community structures in soils.关键词
根际微生态/功能预测/高通量测序/真菌多样性/天山北部Key words
rhizosphere microecology/functional prediction/high-throughput sequencing/fungal diversity/northern Tianshan Mountains引用本文复制引用
李嫚,庄丽,邓錡璋,景玉婷,伍勇,张城铭,夏珊,翟亚萍,杨盼,刘红玲..天山北部不同生境苜蓿根际土壤真菌分布特征及驱动因子[J].干旱区地理,2024,47(7):1187-1198,12.基金项目
国家自然科学基金项目(31871568,31560656) （31871568,31560656）
成都师范学院创新研究团队项目(CSCXTD2020A04) （CSCXTD2020A04）
成都师范学院2018年校级科研项目(CS18ZA02) （CS18ZA02）
成都师范学院2022年大学生创新创业训练计划项目(S202214389093)资助 （S202214389093）
