Phosphorus availability influences disease-suppressive soil microbiome through plant-microbe interactions

作者：Yifan Cao, Zongzhuan Shen, Na Zhang, Xuhui Deng, Linda S. Thomashow, Ian D. E. A. Lidbury, Hongjun Liu, Rong Li, Qirong Shen, George A. Kowalchuk · 发表于：Microbiome · 年份：2024 · DOI：10.1186/s40168-024-01906-w · 被引用次数：86 · 研究领域：Plant-Microbe Interactions and Immunity、Plant nutrient uptake and metabolism、Legume Nitrogen Fixing Symbiosis

BACKGROUND: Soil nutrient status and soil-borne diseases are pivotal factors impacting modern intensive agricultural production. The interplay among plants, soil microbiome, and nutrient regimes in agroecosystems is essential for developing effective disease management. However, the influence of nutrient availability on soil-borne disease suppression and associated plant-microbe interactions remains to be fully explored. T his study aims to elucidate the mechanistic understanding of nutrient impacts on disease suppression, using phosphorous as a target nutrient. RESULTS: A 6-year field trial involving monocropping of tomatoes with varied fertilizer manipulations demonstrated that phosphorus availability is a key factor driving the control of bacterial wilt disease caused by Ralstonia solanacearum. Subsequent greenhouse experiments were then conducted to delve into the underlying mechanisms of this phenomenon by varying phosphorus availability for tomatoes challenged with the pathogen. Results showed that the alleviation of phosphorus stress promoted the disease-suppressive capacity of the rhizosphere microbiome, but not that of the bulk soil microbiome. This appears to be an extension of the plant trade-off between investment in disease defense mechanisms versus phosphorus acquisition. Adequate phosphorus levels were associated with elevated secretion of root metabolites such as L-tryptophan, methoxyindoleacetic acid, O-phosphorylethanolamine, or mangiferin, increasing the re...