Root exudates and rhizosphere microbiota in responding to long-term continuous cropping of tobacco
文献类型： 外文期刊
作者： Li, Abo 2 ; Jin, Keke 2 ; Zhang, Yuzhen 5 ; Deng, Xiaopeng 1 ; Chen, Yi 1 ; Wei, Xiaomeng 4 ; Hu, Binbin 1 ; Jiang, Yonglei 1 ;
作者机构： 1.Yunnan Acad Tobacco Agr Sci, Kunming 650021, Peoples R China
2.Northwest A&F Univ, Coll Life Sci, Yangling 712100, Shaanxi, Peoples R China
3.Ningxia Acad Agr & Forestry Sci, Hort Inst, Yinchuan 750002, Peoples R China
4.Northwest A&F Univ, Coll Nat Resources & Environm, Xianyang 712100, Shaanxi, Peoples R China
5.Qingdao Agr Univ, Nanjing 266109, Peoples R China
关键词： Continuous cropping; Root exudate; Microbial community; Co-occurrence network; Suppressive soil
期刊名称：SCIENTIFIC REPORTS （ 影响因子：3.8； 五年影响因子：4.3 ）
ISSN： 2045-2322
年卷期： 2024 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Soil sickness a severe problem in tobacco production, leading to soil-borne diseases and reduce in tobacco yield. This occurs as a result of the interaction between root exudates and rhizosphere microorganisms, which is however, little studied until now. By combining the field investigation and pot experiment, we found the output yield consistently decreased during the first 10 years of continuous cropping in a tobacco field, but increased at the 15th year (15Y). The root exudate and rhizosphere bacterial community was further analyzed to reveal the underlying mechanism of the suppressive soil formation. Root exudate of 15Y tobacco enriched in amino acids and derivatives, while depleted in the typical autotoxins including phenolic acids and alkaloids. This was correlated to the low microbial diversity in 15Y, but also the changes in community composition and topological properties of the co-occurrence network. Especially, the reduced autotoxins were associated with low Actinobacteria abundance, low network complexity and high network modularity, which significantly correlated with the recovered output yield in 15Y. This study revealed the coevolution of rhizosphere microbiota and root exudate as the soil domesticated by continuous cropping of tobacco, and indicated a potential role of the autotoxins and theirs effect on the microbial community in the formation of suppressive soil.
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