根际
生物
微生物种群生物学
营养循环
大块土
农学
非生物成分
营养物
生物地球化学循环
土壤生态学
土壤微生物学
生态学
土壤水分
土壤有机质
土壤生物多样性
细菌
遗传学
作者
Lei Liu,Ya Gao,Zhiyuan Gao,Li Zhu,Rong Yan,Wenjie Yang,Yu Yang,Jinshan Liu
标识
DOI:10.1111/1365-2435.14388
摘要
Abstract Host plants and the microbiota living in the rhizosphere are interdependent, mutually reinforced and mutually beneficial but the assembly, functions and microbial interactions of the host‐associated microbiota are still unclear. Herein, winter wheat was selected as a test plant to explore the assembly process of total bacteria from bulk soil (BS) and rhizosphere soil (RS), and phoD ‐harbouring bacteria in RS at a long‐term (14 years) trial site. We also identified core microbes that are potentially relevant to soil carbon (C), nitrogen (N) and phosphorus (P) cycling genes and soil biogeochemical properties, and investigated the relationships between soil variables, functional genes and wheat productivity. The results showed that the microhabitat of the plant, rather than P fertilizer input, was the main factor affecting the microbial diversity, composition and co‐occurrence networks. The BS bacterial community was driven by deterministic processes but the RS and phoD bacterial communities were dominated by stochastic processes. The influence of deterministic processes decreased with increasing soil nutrient content. A core microbial community consisted of 10 OTUs in different microhabitats and was significantly related to soil functional genes and properties. In the rhizosphere soil, significant correlations were found between soil variables, soil functional bacteria and genes, and crop productivity. Synthesis and applications . This study provides empirical evidence that the assembly process of the microbial community is governed by environmental factors in various soil environments and provides new perspectives on the sustainable improvement of crop productivity. Read the free Plain Language Summary for this article on the Journal blog.
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