Journal of Microbiology

Research Support, Non-U.S. Gov't

Application of Terminal Restriction Fragment Length Polymorphism (T-RFLP) Analysis to Monitor Effect of Biocontrol Agents on Rhizosphere Microbial Community of Hot Pepper (Capsicum annuum L.): Young Tae Kim , Myoungho Cho , Je Yong Jeong , Hyang Burm Lee , Seung Bum Kim; J. Microbiol. 2010;48(5):566-572. Published online November 3, 2010; DOI: https://doi.org/10.1007/s12275-010-0126-6

Abstract: Microbial communities in hot pepper (Capsicum annuum L.) cultivation fields under different cultivation methods were investigated by terminal restriction fragment length polymorphism (T-RFLP) analysis. Rhizosphere soil and leaf samples were collected from control, conventional and nature-friendly cultivation fields between May and July, 2009. Two Bacillus subtilis strains were applied to nature-friendly cultivation fields as biocontrol agents during the sampling period. Relative abundances of bacteria and plant pathogenic fungi related T-RFs were also measured to monitor the effect of biocontrol agents on potential plant pathogenic fungi. In the principal component analysis (PCA) based on T-RFLP profiles, the microbial communities from rhizosphere soil samples in July, including bacteria and fungi, showed distinct difference between nature-friendly cultivation fields and other cultivation fields. However, there was no correlation between cultivation methods and leaf microbial communities at any sampling period. Changes in the abundance of bacteria related T-RF in the rhizosphere of nature-friendly cultivation fields were observed clearly two months after application of biocontrol agent, while the abundance of plant pathogenic fungi related T-RFs significantly decreased.

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