Biocontrol Efficacy of Bacillus subtilis BCB3-19 against Tomato Gray Mold

Main Article Content

Sirirat Siripornvisal*

Abstract

The soil bacterium, BCB3-19, isolated from rhizosphere of tomato and identified as Bacillus subtilis was evaluated for biocontrol activities against Botrytis cinerea, a phytopathogenic fungus causing gray mold rot of tomatoes after harvest. In vitro assay by co-culture of BCB3-19 and B. cinerea on agar plates showed that the bacterium effectively inhibited radial growth of the fungus at 4° C and 23°C. In vivo evaluation on tomato fruits showed that the bacterium effectively suppressed the development of gray mold at 4°C and 23°C. The population dynamic study showed that the bacterium successfully colonized tomato fruits. Population of the bacterium was continually increasing at 23°C but was static at 4°C. The bacterium did not exhibit hemolytic and lecithinase activities. These findings support the potential use of Bacillus subtilis BCB3-19 for biological control of postharvest tomatoes against B. cinerea.


Keywords: Bacillus subtilis, Botrytis cinerea, Biocontrol, tomato


E-mail: [email protected]

Article Details

Section
Original Research Articles

References

[1] Leclère, V., Béchet, M., Adam, A., Guez, J.-S., Wathelet, B., Ongena, M., Thonart, P.,Gancel, F., Chollet-Imbert, M. and Jacques, P. 2005. Mycosubtilin overproduction by Bacillus subtilis BBG100 enhances the organism’s antagonistic and biocontrol activities. Applied and Environmental Microbiology, 71(8), 4577- 4584.
[2] Stein, T., Borchert, S., Conrad, B., Feesche, J., Hofemeister, B., Hofemeister, J. and Entian,K. D. 2002. Two different antibiotic-like peptides originate from the ericin gene cluster of Bacillus subtilis A1/3. Journal of Bacteriology, 184, 1703-1711.
[3] Liu, Y. F., Chen, Z. Y., Ng, T. B., Zhang, J., Zhou, M. G., Song, F. P. and Liu, Y. Z. 2006. Bacisubin, an antifungal protein with ribonuclease and hemagglutinating activities from Bacillus subtilis strain B-916. Peptides 28:553-559
[4] Grover, M., Nain, L., Singh, S. B. and Saxena, A. K. 2010. Molecular and biochemical approaches for characterization of antifungal trait of a potent biocontrol agent Bacillus subtilis RP24. Current Microbiology, 60, 99-106.
[5] Barbe, V., Cruveiller, S., Kunst, F., Lenoble, P., Meurice, G., Sekowska, A., Vallenet, D.,Wang, T., Moszer, I., Médigue, C. and Danchin, A. 2009. From a consortium sequence to a unified sequence: the Bacillus subtilis 168 reference genome a decade later. Microbiology,155, 1758-1775.
[6] Teo, A. Y. L. and Tan, H. M. 2005. Inhibition of Clostridium perfringens by a novel strain of Bacillus subtilis isolated from the gastrointestinal tracts of healthy chickens. Applied and Environmental Microbiology, 71, 4185-4190.
[7] Pinchuk, I. V., Bressollier, P., Verneuil, B., Fenet, B., Sorokulova, I.B., Mégraud, F. and Urdaci, M. C. 2001. In vitro anti-Helicobacter pylori activity of the probiotic strain Bacillus subtilis 3 is due to secretion of antibiotics. Antimicrobial Agents and Chemotherapy, 45,3156-3161.
[8] Sorokulova, I. B., Pinchuk, I. V., Denayrolles, M., Osipova, I. G., Huang, J. M., Cutting, S.M. and Urdaci, M. C. 2008. The safety of two Bacillus probiotic strains for human use.Digestive Diseases and Science, 53, 954-963.
[9] Bergey's Manual of Determinative Bacteriology 1994. Bergey’s Manual of Determinative Bacteriology. 9th ed. Baltimore: The Williams and Wilkins Company.
[10] Wang, S., Tongle H. U., Yanling J. I. A. O., Jianjian W. E. I. and Keqiang C. A. O. 2009.Isolation and characterization of Bacillus subtilis EB-28, an endophytic bacterium strain displaying biocontrol activity against Botrytis cinerea Pers. Frontiers of Agriculture in China, 3(3), 247-252.
[11] Weisburg, W. G., Barns, S. M., Pelletier, D. A. and Lane, D. J. 1991.16S ribosomal DNA amplification for phylogenetic study. Journal of Bacteriology, 173:697-703.
[12] Yamada, Y., Katsura, K., Kawasaki, H., Widyastuti, Y., Saono, S., Seki, T., Uchimura, T. and Komagata, K. 2000. Asia bogorensis gen. nov., an unusual acetic acid bacterium in the
α- Proteobacteria. International Journal of Systematic and Evolutionary Microbiology, 50,823-829.
[13] Gholamreza, D. N., Mohammadreza, H., BibiFazly Bazzaz, S. and Fazly, B. 2005. Isolation,characterization, and investigation of surface and hemolytic activities of a lipopeptide biosurfactant produced by Bacillus subtilis ATCC 6633. Journal of Microbiology, 43, 272-276.
[14] Liu, J., Fang, C., Jiang, Y. and Yan, R. 2009. Characterization of a hemolysin gene ytjA from Bacillus subtilis. Current Microbiology, 58, 642-647.