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Biocontrol Science and Technology Volume 32, 2022 - Issue 8
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Brief Report

Seed priming with biosurfactant and biosurfactant producing bacteria induces resistance against Ralstonia solanacearum in tomato plants

Abitha Bensona Department of Biotechnology, Karpaga Vinayaga College of Engineering and Technology, Chengalpattu, IndiaView further author information
,
Gomathi Ramb Department of Microbiology, School of Life Sciences, Vels Institute of Science, Technology & Advanced Studies, Chennai, IndiaView further author information
,
Jaak Truuc Institute of Molecular and Cell Biology, University of Tartu, Tartu, EstoniaView further author information
,
Marika Truuc Institute of Molecular and Cell Biology, University of Tartu, Tartu, EstoniaView further author information
,
Allen John Henryb Department of Microbiology, School of Life Sciences, Vels Institute of Science, Technology & Advanced Studies, Chennai, IndiaView further author information
&
Manoharan Melvin Joed Department of Microbiology, SRM College of Agricultural Sciences, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattakulathur, IndiaCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-3740-4239View further author information
ORCID Icon
Pages 1027-1033 | Received 08 Jul 2021, Accepted 31 Mar 2022, Published online: 20 Apr 2022
 
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ABSTRACT

In this study, the effect of seed treatment with Achromobacter xylosoxidans AUM54 and glycolipid-type biosurfactants produced by this bacterial strain to suppress Ralstonia solanacearum, which causes bacterial wilt in tomato plants, was investigated. Applying biosurfactant in combination with the biosurfactant-producing bacteria reduced the R. solanacearum population on the tomato seed surface by 44% and reduced the seed infection percentage by 87%. In addition, these treatments induced resistance in tomato plants against this pathogen, evidenced by the increased activities of defence-related enzymes, such as phenylalanine ammonia-lyase, polyphenol oxidase, and peroxidase, and reduced the percentage of disease severity (DS).

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was supported by the Estonian Research Council (PRG548).

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