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VOL. 8, ISSUE 2 (2026)
Biocontrol potential of Chromobacterium violaceum isolated from the below-Sea-Level Paddy Fields of Kuttanad, Alappuzha, Kerala, India
Authors
Roshmi Thomas, Gawtam C Joseph, Sreedev S, Goutham Ramesh, Sooraj Krishna S, Anantha Krishnan S Nair
Abstract
Rice, the edible starchy cereal grain is the most important food crop
grown in Kerala especially in Palakkad and Alappuzha, Kerala, India. However,
the occurrence of rice diseases during cultivation poses a significant
challenge to achieving optimal yields. Among the major pathogens, Pythium
species, which cause seedling blight or root rot are of important concern,
particularly in water-seeded rice production. Pythium myriotylum is a
serious threat to rice production, causing significant damage to seedlings and
reducing yields. Plant growth-promoting rhizobacteria act as an inhibitory
factor for various pathogenic microorganisms through the production of some
metabolites which stops the further growth of the particular pathogen. Thus the
present study involved the isolation of rhizosphere bacteria, molecular identification
and screening of their antagonistic properties against plant pathogen Pythium
myriotylum. It was come to found that the selected pigmented bacteria have
some antagonistic properties, which completely inhibited the further growth of
the test pathogen. Furthermore, they were identified as potent phosphate
solubilizers. For this, genomic DNA was isolated followed by PCR amplification
and sequence analysis of 16S rDNA. The sequence were further be subjected to
BLAST analysis and showed 100% similarity with the available database sequence
of Chromobacterium violaceum. Therefore rhizosphere bacteria isolated in
the current work indicates their potential to be exploited serve effectively as
both a biofertilizer and a prominent biocontrol agent against soil-borne
pathogens.
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Pages:1-5
How to cite this article:
Roshmi Thomas, Gawtam C Joseph, Sreedev S, Goutham Ramesh, Sooraj Krishna S, Anantha Krishnan S Nair "Biocontrol potential of <i>Chromobacterium violaceum</i> isolated from the below-Sea-Level Paddy Fields of Kuttanad, Alappuzha, Kerala, India". International Journal of Biotechnology and Microbiology, Vol 8, Issue 2, 2026, Pages 1-5
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