The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes.

ABSTRACT: A three-year field monoculture trial of Radix pseudostellariae and complementary laboratory studies were conducted to further elucidate the underlying mechanism responsible for significant decreases in the biomass yield and quality of R. pseudostellariae under continuous monoculture regimes. HPLC analysis indicated that continuous monoculture soil was rich in organic acids, which had cumulative effects over time. Further analysis suggested that the application of a mixture of organic acids significantly promoted growth of pathogenic fungi, and increased the expression of chemotaxis-related gene (cheA) and biofilm formation of the specific pathogenic Kosakonia sacchari. However, opposite reactions were observed in the case of Bacillus megaterium and Bacillus pumilus. Concurrently, the prese

SUBMITTER: Wu H 

PROVIDER: S-EPMC5471291 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature