Effects of mycorrhiza and hyphae on the response of soil microbial community to warming in eastern Tibetan Plateau

菌根 菌丝 丛枝菌根 外生菌根 生物量(生态学) 微生物种群生物学 生物 植物 共生 农学 细菌 遗传学
作者
Lin Luo,Min Guo,En Tao Wang,Chunying Yin,Yanjie Wang,Heliang He,Chunzhang Zhao
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:837: 155498-155498 被引量:13
标识
DOI:10.1016/j.scitotenv.2022.155498
摘要

The effects of mycorrhiza and its external hyphae on the response of soil microbes to global warming remain unclear. This study investigates the role of mycorrhiza and its hyphae in regulating soil microbial community under warming by examining the microbial biomass and composition in the ingrowth cores of arbuscular mycorrhiza (AM) plant, Fargesia nitida, and ectomycorrhiza (ECM) plant, Picea asperata, with/without mycorrhiza/hyphae and experimental warming. The results showed that warming significantly increased the biomass of all soil microbes (by 19.89%-137.48%) and altered the microbial composition in both plant plots without mycorrhiza/hyphae. However, this effect was weakened in the presence of mycorrhiza or hyphae. In F. nitida plots, warming did not significantly affect biomass and composition of most soil microbial groups when mycorrhiza or hyphae were present. In P. asperata plots, warming significantly increased the total and ECM fungi (ECMF) biomass in the presence of hyphae (p < 0.05) and the total, Gn, and AM fungi (AMF) biomass in the presence of mycorrhiza (p < 0.05). Meanwhile, the response of enzyme activities to warming was also altered with mycorrhiza or hyphae. Additionally, soil microbial community composition was mainly influenced by soil available phosphorus (avaP), while enzyme activities depended on soil avaP, dissolved organic carbon (DOC), and nitrate concentrations. Our results indicate that mycorrhiza and its hyphae are essential in regulating the response of microbes to warming.
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