Journal
MICROBIOLOGICAL RESEARCH
Volume 205, Issue -, Pages 40-47Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.micres.2017.08.012
Keywords
Biocontrol; Bacillus pumilus; Fagopyrum esculentum; Surfactin; Rhizoctonia solani; Fusarium oxysporum
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Funding
- UCOST, Dehradun, Uttarakhand, India
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Chitinase and surfactin-mediated biocontrol of Rhizoctonia solani and Fusarium oxysporwn causing wilt and root rot of Fagopyrwn esculentum respectively has been studied in this communication. Bacillus pumilus MSUA3 as a potential bacterial strain strongly inhibited the growth of R. solani and F. oxysporwn involving the chitinolytic enzymes and an antibiotic surfactin. Plant growth promoting attributes seem to be involved in plant growth promotion and yield attributes. The action of cell-free culture supernatant (CFCS) was found deleterious to F. oxysporum and R. solani even in the heat-treated (boiled/autoclaved) CFCS. The possible involvement of surfactin in disease control was revealed by colony PCR amplification of SrfA. Chitinolytic enzyme and antibiotic surfactin evidenced differential biocontrol of F. oxysporum and R. solani by B. pumilus MSUA3. A significant reduction in disease index under gnotobiotic conditions and productivity enhancement of F. esculentum using vermiculite-based bioformulation revealed B. pumilus MSUA3 as a successful potential biocontrol agent (BCA) and an efficient plant growth promoting rhizobacterium (PGPR) for disease management and productivity enhancement of buckwheat crop.
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