Bioprospecting endophytic diazotrophic Lysinibacillus sphaericus as biocontrol agents of rice sheath blight disease View Full Text


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Article Info

DATE

2017-09-20

AUTHORS

S. Shabanamol, J. Sreekumar, M. S. Jisha

ABSTRACT

The present study tried to explore the possible in vitro biocontrol mechanisms of Lysinibacillus sphaericus, a diazotrophic endophyte from rice against the rice sheath blight pathogen Rhizoctonia solani. The in vivo biocontrol potential of the isolate and the induction of systemic resistance under greenhouse conditions have also been experimented employing different treatments with positive control carbendazim, the chemical fungicide. The endophytic isolate showed 100% growth inhibition of the fungal pathogen via volatile organic compound production and was positive for the production of siderophores, biosurfactants, HCN, and ammonia. Under greenhouse conditions, foliar and soil application of L. sphaericus significantly decreased the percentage of disease incidence. All bacterized treatments are superior to chemical fungicide treatment. Application of L. sphaericus in single and combination treatments induces systemic resistance as evident from the significant accumulation of defense enzymes such as peroxides, polyphenol oxides and phenylalanine ammonia in addition to the increase of phenolic compounds. The results biologically prospect endophytic diazotroph L. sphaericus as a potent plant growth promoter with excellent biocontrol efficiency. More... »

PAGES

337

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s13205-017-0956-6

DOI

http://dx.doi.org/10.1007/s13205-017-0956-6

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1091864066

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/28955634


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