Spatial and temporal dynamics of the bacterial community under experimental warming in field-grown wheat

PeerJ

article

Jing Wang¹  Shuaimin Chen¹  Ruibo Sun¹  Binbin Liu¹  Tatoba Waghmode¹  Chunsheng Hu¹ 

[1] Key Laboratory of Agricultural Water Resources, Hebei Laboratory of Agricultural Water-Saving, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, The Chinese Academy of Sciences;University of Chinese Academy of Sciences;Xiong’an Institute of Innovation, Chinese Academy of Sciences

关键词: Warming;    Wheat;    Microbial activity;    Root-zone microbial community;   

DOI  :  10.7717/peerj.15428

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Climate change may lead to adverse effects on agricultural crops, plant microbiomes have the potential to help hosts counteract these effects. While plant–microbe interactions are known to be sensitive to temperature, how warming affects the community composition and functioning of plant microbiomes in most agricultural crops is still unclear. Here, we utilized a 10-year field experiment to investigate the effects of warming on root zone carbon availability, microbial activity and community composition at spatial (root, rhizosphere and bulk soil) and temporal (tillering, jointing and ripening stages of plants) scales in field-grown wheat (Triticum aestivum L.). The dissolved organic carbon and microbial activity in the rhizosphere were increased by soil warming and varied considerably across wheat growth stages. Warming exerted stronger effects on the microbial community composition in the root and rhizosphere samples than in the bulk soil. Microbial community composition, particularly the phyla Actinobacteria and Firmicutes, shifted considerably in response to warming. Interestingly, the abundance of a number of known copiotrophic taxa, such as Pseudomonas and Bacillus, and genera in Actinomycetales increased in the roots and rhizosphere under warming and the increase in these taxa implies that they may play a role in increasing the resilience of plants to warming. Taken together, we demonstrated that soil warming along with root proximity and plant growth status drives changes in the microbial community composition and function in the wheat root zone.

【 授权许可】

CC BY