Plant-microbe rhizosphere interactions mediated by Rehmannia glutinosa root exudates under consecutive monoculture.

ABSTRACT: Under consecutive monoculture, the biomass and quality of Rehmannia glutinosa declines significantly. Consecutive monoculture of R. glutinosa in a four-year field trial led to significant growth inhibition. Most phenolic acids in root exudates had cumulative effects over time under sterile conditions, but these effects were not observed in the rhizosphere under monoculture conditions. It suggested soil microbes might be involved in the degradation and conversion of phenolic acids from the monocultured plants. T-RFLP and qPCR analysis demonstrated differences in both soil bacterial and fungal communities during monoculture. Prolonged monoculture significantly increased levels of Fusarium oxysporum, but decreased levels of Pseudomonas spp. Abundance of beneficial Pseudomonas spp. with antago

SUBMITTER: Wu L 

PROVIDER: S-EPMC4626807 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature