武汉工程大学学报2025，Vol.47Issue(6)：634-640,705,8.DOI:10.19843/j.cnki.CN42-1779/TQ.202404015
中国水稻土壤古菌膜脂iGDGTs的分布特征及其环境意义
Distribution and environmental significance of archaea-derived iGDGTs in paddy soils across China
摘要
Abstract
Glycerol dialkyl glycerol tetraethers(GDGTs),microbial membrane lipids,are sensitive and effective proxies for environmental changes and have been increasingly used in global changes research.In this study,we investigated the composition of iGDGTs(isoprenoidal GDGTs)derived from archaea in paddy soils collected from 36 different regions across China.The results revealed variations in iGDGT distributions at both regional and national scales.Notably,GDGT-2 and GDGT-3 showed significant correlations with environmental factors,and the relative abundance of iGDGTs was primarily controlled by total organic carbon(TOC),total nitrogen(TN)content,and soil pH.Under flooded conditions,the biological sources of iGDGTs were altered.The concomitant decrease in soil pH and the production of greenhouse gases under anaerobic conditions led to decreased soil C and N contents.These changes were manifested as increased abundances of GDGT-2 and GDGT-3,resulting in a higher TEX86 index.Additionally,ammonia-oxidizing archaea(AOA)were inhibited,which reduced the production and accumulation of Crenarchaeol and consequently increased the BIT index.In contrast,other indices,such as Ri/b and GDGT-0/Crenarchaeol,were predominantly influenced by soil water content.关键词
水稻土壤/微生物膜脂/iGDGTs/分布特征/环境因子Key words
paddy soil/microbial membrane lipids/iGDGTs/distribution pattern/environmental factors分类
生物科学引用本文复制引用
冯雪晴,谭严,贾明敏,冯俊俊,薛建涛..中国水稻土壤古菌膜脂iGDGTs的分布特征及其环境意义[J].武汉工程大学学报,2025,47(6):634-640,705,8.基金项目
国家自然科学基金(41903066) （41903066）
流域关键带演化湖北省重点实验室开放基金(CZE2022F05) （CZE2022F05）
