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, Shijiazhuang, Hebei, China.
University of Chinese Academy of Sciences, Beijing, China.
PeerJ. 2023 Jun 14;11:e15428. doi: 10.7717/peerj.15428. eCollection 2023.
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 ( 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 and and genera in 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.
气候变化可能对农业作物产生不利影响，植物微生物组有潜力帮助宿主抵御这些影响。虽然已知植物-微生物相互作用对温度敏感，但升温如何影响大多数农业作物中植物微生物组的群落组成和功能仍不清楚。在这里，我们利用一个为期 10 年的田间实验，在田间生长的小麦 ( L.) 中，从空间（根、根际和土壤）和时间（植株分蘖、拔节和成熟阶段）尺度上研究了升温对根区碳供应、微生物活性和群落组成的影响。根际土壤升温增加了溶解有机碳和微生物活性，并且在小麦生长阶段变化很大。升温对根和根际样本中的微生物群落组成的影响强于对土壤样本的影响。微生物群落组成，特别是放线菌门和厚壁菌门，对升温有明显的响应。有趣的是，一些已知的富营养类群的丰度，如 和 以及 属中的一些属，在根和根际中增加了，这表明它们可能在增加植物对升温的适应能力方面发挥作用。总之，我们证明了土壤升温以及根的接近和植物生长状态驱动了小麦根区微生物群落组成和功能的变化。
