Exogenously applied ferulic acid and p-coumaric acid differentially affect cucumber rhizosphere Trichoderma spp. community structure and abundance

• Published in: Plant, soil and environment Vol. 66; no. 9; pp. 461 - 467
• Main Authors: Rahman, Muhammad Khashi U, Tan, Shengcheng, Ma, Changli, Wu, Fengzhi, Zhou, Xingang
• Format: Journal Article
• Language: English; Czech
• Published: Prague Czech Academy of Agricultural Sciences (CAAS) 01.01.2020; Czech Academy of Agricultural Sciences
• Subjects: Abundance; Acids; allelochemicals; antioxidant; Banded structure; Community structure; Continuous cropping; Coumaric acid; Cucumbers; cucumis sativus l; Electrophoresis; Ferulic acid; Fungi; Gel electrophoresis; Microbiota; microorganism; Microorganisms; p-Coumaric acid; Phenolic acids; Phenols; Plant communities; Plant growth; Polymerase chain reaction; Rhizosphere; root exudate; Soil microorganisms; soil sickness; Soils; Trichoderma
• ISSN: 1214-1178; 1805-9368
• DOI: 10.17221/681/2019-PSE

Continuous monocropping can cause the buildup of autotoxins (e.g., phenolic compounds) in the soil, which can alter soil microbial community and inhibit plant growth. However, how different phenolic compounds affect certain soil microbiota is unclear. Here, we studied the response of cucumber rhizosphere Trichoderma spp. community to exogenously applied ferulic and p-coumaric acids by polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) and real-time PCR techniques. Results showed that ferulic acid, but not p-coumaric acid, increased the Trichoderma spp. abundance, and this increase were positively correlated with ferulic acid concentration. Moreover, ferulic acid changed the community structure, increased the number of DGGE bands, Shannon wiener, and evenness index values, while p-coumaric acid had no effect on all these parameters of Trichoderma spp. community. These results suggest that these two phenolic acids affected Trichoderma spp. differentially at the community level.