根际细菌
苯丙素
生物
代谢组
开枪
代谢组学
代谢途径
植物
类黄酮
类黄酮生物合成
生物化学
新陈代谢
生物合成
细菌
根际
转录组
基因
遗传学
生物信息学
基因表达
抗氧化剂
作者
Je-Seung Jeon,Dominika Rybka,Natalia Carreño-Quintero,Ric C. H. de Vos,J.M. Raaijmakers,Desalegn W. Etalo
摘要
Abstract Various root‐colonizing bacterial species can promote plant growth and trigger systemic resistance against aboveground leaf pathogens and herbivore insects. To date, the underlying metabolic signatures of these rhizobacteria‐induced plant phenotypes are poorly understood. To identify core metabolic pathways that are targeted by growth‐promoting rhizobacteria, we used combinations of three plant species and three rhizobacterial species and interrogated plant shoot chemistry by untargeted metabolomics. A substantial part (50%–64%) of the metabolites detected in plant shoot tissue was differentially affected by the rhizobacteria. Among others, the phenylpropanoid pathway was targeted by the rhizobacteria in each of the three plant species. Differential regulation of the various branches of the phenylpropanoid pathways showed an association with either plant growth promotion or growth reduction. Overall, suppression of flavonoid biosynthesis was associated with growth promotion, while growth reduction showed elevated levels of flavonoids. Subsequent assays with 12 Arabidopsis flavonoid biosynthetic mutants revealed that the proanthocyanidin branch plays an essential role in rhizobacteria‐mediated growth promotion. Our study also showed that a number of pharmaceutically and nutritionally relevant metabolites in the plant shoot were significantly increased by rhizobacterial treatment, providing new avenues to use rhizobacteria to tilt plant metabolism towards the biosynthesis of valuable natural plant products.
科研通智能强力驱动
Strongly Powered by AbleSci AI