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In vitro antagonistic potential of bacterial endophytes against chilli anthracnose pathogen Colletotrichum acutatum

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Title In vitro antagonistic potential of bacterial endophytes against chilli anthracnose pathogen Colletotrichum acutatum
 
Creator GBS, Manikantha Chowdary
R, Sutha Raja Kumar
Ruban, Sam
 
Subject Bacillus amyloliquefaciens
Biocontrol
GC-MS
Sustainable disease management
 
Description 824-833
The escalating threat of chilli anthracnose and the adverse effects
of chemical pesticides underscore the urgency for sustainable
management of chilli anthracnose. This study aims to identify the
potential endophytic bacteria as eco-friendly solutions to combat chilli
anthracnose pathogen. Through evaluating their antagonistic effects,
we aim to provide effective biological control strategies for this
destructive plant disease. Among the 74 bacterial endophytes isolated
from healthy chilli plants, Bacillus amyloliquefaciens (ENLB 4)
exhibited the most pronounced antagonistic effect against the chilli
anthracnose pathogen Colletotrichum acutatum. In vitro tests revealed
that ENLB 4 inhibited the pathogen's growth by 56.43%.
Additionally, the cell-free culture filtrate of ENLB 4 exhibited
substantial inhibitory effects on pathogen growth at various
concentrations (46.74% at 5%, 54.99% at 10%, and 63.55% at 15%,
respectively). Similarly, volatile organic compounds produced by
ENLB 4 resulted in a higher (37.78%) growth inhibition of the
pathogen. Analysis of the culture filtrate using GC-MS identified 17
compounds, some of which possess antimicrobial properties
(hexanoic acid, 3-Isobutylhexahydropyrrolo[1,2-a] pyrazine-1,4-
dione, isovaleric acid), while others are known to induce systemic
resistance in treated plants (acetic acid). These findings underscore the
potential of endophytic bacteria, exemplified by B. amyloliquefaciens,
as effective and environmentally friendly agents for disease
management in agriculture.
 
Date 2024-10-03T10:38:38Z
2024-10-03T10:38:38Z
2024-10
 
Type Article
 
Identifier 0975-1009 (Online); 0019-5189 (Print)
http://nopr.niscpr.res.in/handle/123456789/64668
https://doi.org/10.56042/ijeb.v62i10.7626
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJEB Vol.62(10) [October 2024]