文献类型：期刊文献

英文题名：Contrasting fungal community assembly mechanisms in bulk soil and rhizosphere of Torreya grandis across a 900-year age gradient

作者：Wang, Bin[1] Na, Xiaofan[2,3] Huang, Shengyi[1] Li, Zhengcai[1] Zhou, Zhichun[1] Huang, Juying[4] Pu, Meiyun[2,3] Cheng, Zhenyu[2,3] He, Xiaoqi[2,3]

第一作者：王斌

通信作者：Wang, B[1];Na, XF[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fuyang 311400, Zhejiang, Peoples R China;[2]Lanzhou Univ, Sch Life Sci, Lanzhou 730001, Peoples R China;[3]Minist Educ, Key Lab Cell Act & Stress Adaptat, Lanzhou 730001, Peoples R China;[4]Ningxia Univ, Inst Environm Engn, Yinchuan 750021, Peoples R China

年份：2025

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85217702668);WOS:【SCI-EXPANDED(收录号:WOS:001415172100001)】；

基金：This study was supported by grants from National R&D Program of China (2023YFD2200902) and National Natural Science Foundation of China (Nos. 32271698).

语种：英文

外文关键词：Assembly; Fungal community; Rhizosphere; Soil; Stand age; Torreya grandis

摘要：Background and aimsSoil microbial communities, including fungi, play a pivotal role in the sustainability of forest ecosystems, yet the ecological processes driving their assembly with forest development remain elusive. This study aims to investigate the variations in the assembly mechanism of soil fungal communities with the development of Torreya grandis forests.MethodBarcode sequencing was conducted to identify and characterize the fungal community in both bulk soil and the rhizosphere of T. grandis along a chronosequence spanning 900 years in a subtropical forest. The total carbon, nitrogen and phosphorus contents of plant tissues, as well as major abiotic properties of the bulk soils, were determined simultaneously.ResultsOur findings reveal that fungal community composition, rather than alpha diversity, changes with stand development, independent of shifts in plant and soil properties. As stands develop, saprotrophic fungi become enriched and fungal co-occurrence networks simplify, particularly in the bulk soil, indicating a soil environment with reduced competitive pressure for niches among fungal populations. Fungal community assembly in bulk soils is governed by dispersal limitation, whereas that of the rhizospheric assemblage transitions from dispersal limitation to homogeneous selection as stands develop. Notably, the genus Talaromyces, known for its biocontrol and plant-growth promotion capabilities, dominates the ecological process transition in the rhizosphere of T. grandis.ConclusionOur results propose a host-mediated deterministic selection of beneficial fungal populations in the rhizosphere as stands develop, supporting the health and ecological sustainability of ancient forest ecosystems in subtropical areas.