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Multifaceted growth promotion and biocontrol of Agroathelia rolfsii and induction of defense mechanism by Bacillus amyloliquefaciens SS-CR10 on chilli.
- Source :
-
Physiologia plantarum [Physiol Plant] 2024 Nov-Dec; Vol. 176 (6), pp. e14627. - Publication Year :
- 2024
-
Abstract
- Plant-growth-promoting (PGP) endophytic bacteria are beneficial microorganisms that can help plants withstand biotic stress caused by fungal phytopathogens. In the present study, 78 endophytic bacterial isolates were isolated from chilli (Capsicum annuum L.). A potent isolate with several PGP attributes and better inhibition against Agroathelia rolfsii was selected and identified as Bacillus amyloliquefaciens using 16S rDNA homologies. Phosphate solubilization (65.9 μg ml <superscript>-1</superscript> ), nitrogen fixation, production of IAA (9.77 to 24.45 μg ml <superscript>-1</superscript> ), ammonia, ACC deaminase, siderophore, and hydrolytic enzymes were among the PGP traits shown by the strain SS&#95;CR10. Furthermore, the strain demonstrated the ability to colonize roots. It significantly improved the plant's developmental traits, such as fresh and dry weight, photosynthetic pigments, and root and shoot length. LC-MS analysis and PCR amplification of lipopeptide genes also showed that surfactin, iturin, and bacilysin lipopeptides were present. Following treatments with lipopeptide extract and bacterial suspension, A. rolfsii mycelia showed severe deformation and cell death, as seen by live dead staining by fluorescent microscopy and scanning electron microscopy (SEM). Finally, the upregulation of defense-related genes CaPR1, CaPR2, and CaPR4 after bacterial treatment confirmed the induction of systemic resistance. In conclusion, this study shows how strain SS&#95;CR10 might be useful for promoting plant growth in chilli and controlling A. rolfsii in an eco-friendly way, which would protect the health of the soil.<br /> (© 2024 Scandinavian Plant Physiology Society.)
- Subjects :
- Ascomycota physiology
Plant Roots microbiology
Plant Roots growth & development
Plant Diseases microbiology
Plant Diseases prevention & control
Endophytes physiology
Biological Control Agents
Nitrogen Fixation
Basidiomycota
Bacillus amyloliquefaciens physiology
Capsicum microbiology
Capsicum growth & development
Subjects
Details
- Language :
- English
- ISSN :
- 1399-3054
- Volume :
- 176
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Physiologia plantarum
- Publication Type :
- Academic Journal
- Accession number :
- 39604316
- Full Text :
- https://doi.org/10.1111/ppl.14627