Effects of ferulic and p-hydroxybenzoic acids on Fusarium community structure and abundance in cucumber seedling rhizosphere

Soil microorganisms play an important role in agricultural ecosystem. However, there is little information about the effects of putative allelochemicals on specific soil vivo. Cucumber seedlings were treated with four concentrations ferulic and p-hydroxybenzoic acids (0-1.0 μmol g-1 soil) soil. Effects rhizosphere Fusarium community structures abundance analyzed by polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) real-time PCR techniques, respectively. The results showed that acid at 0.25, 0.5 1.0 significantly reduced number bands Fusarium, Shannon Wiener evenness index community. All changed structure including decreasing bands, index. Ferulic all promoted Fusarium. had highest among treatments. These indicate various which was different from acid, this may be related to cucumber autotoxicity, giving us a further understanding sickness.