高原农业2026，Vol.10Issue(4)：449-460,554,13.DOI:10.19707/j.cnki.jpa.2026.04.003
色季拉山急尖长苞冷杉外生菌根真菌多样性研究
A Study of the Diversity of Ectomycorrhizal Fungi Associated with Abies georgei var.smithii in Sygera Mountain
摘要
Abstract
To investigate the diversity characteristics of ectomycorrhizal(ECM)in Smith Fir(Abies georgei var.smithii)at different altitudinal gradients in Sygera Mountain and their correlation with soil environmental factors;this study along different elevation gradients on Sygera Mountain collected ECM fungal samples and soil samples from Smith Firs,and then identified the molecular of ECM fungi by using Sanger sequencing to analyze diversity and its relationship with soil physicochemical properties.The results indicate:(1)Overall infection rates across different elevations showed little variation and tended toward stability.(2)A total of 49 ECM fungal species were identified on Abies georgei var.smithii,belonging to the Basidiomycota and Ascomycota phyla.(3)Across four transects in Sygera Mountain,the dominant genera of ECM fungi in Abies georgei var.Smithii were Russula,Lactarius,and Cortinarius,though the proportions of these three dominant species varied by elevation:3 900 m:25.71%,22.86%,20.67%;4 100 m:27.50%,20.00%,20.00%;4 300 m:37.50%,29.17%,16.67%.(4)The diversity of ECM fungal communities in Abies georgei var.smithii forests did not change much between different altitudes.At 4 100 m elevation,the Shannon-Wiener index was significantly higher than at other elevations,while the Simpson diversity index was significantly lower,indicating that mid-elevation zones are more conducive to maintaining ECM fungal diversity.(5)Soil pH,organic carbon,and total phosphorus are key factors driving the altitudinal differentiation of ECM fungal communities.Organic carbon and total phosphorus showed significant positive correlations with ECM diversity indices,while total nitrogen exhibited a negative correlation.The findings of this study provide a theoretical basis for further systematic research on the adaptive strategies of ECM fungi in subalpine dark coniferous forests along altitudinal gradients.as well as for maintaining the ecological functions of high-altitude forests under the context of climate change.关键词
色季拉山/急尖长苞冷杉/海拔梯度/外生菌根真菌多样性/土壤理化性质Key words
Sygera Mountain/Abies georgei var.smithii/Altitude gradient/Diversity of ectomycorrhizal fungi/Soil physical and chemical properties分类
农业科技引用本文复制引用
周彭浩,韩其晟,任毅华,张济生,屈兴乐,边巴..色季拉山急尖长苞冷杉外生菌根真菌多样性研究[J].高原农业,2026,10(4):449-460,554,13.基金项目
西藏高原森林生态教育部重点实验室开放课题(XZA-JYBSYS-2022-03) （XZA-JYBSYS-2022-03）
西藏高原森林生态教育部重点实验室研究生创新计划项目(XZAJYBSYS-202505). （XZAJYBSYS-202505）
