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Sodium alginate potentiates antioxidant defense and PR proteins against early blight disease caused by Alternaria solani in Solanum lycopersicum Linn.

Authors :
Dey P
Ramanujam R
Venkatesan G
Nagarathnam R
Source :
PloS one [PLoS One] 2019 Sep 30; Vol. 14 (9), pp. e0223216. Date of Electronic Publication: 2019 Sep 30 (Print Publication: 2019).
Publication Year :
2019

Abstract

The use of biopolymers as elicitors in controlling plant diseases is gaining momentum world-wide due to their eco-friendly and non-toxic nature. In the present study, we have used an algal biopolymer (sodium alginate) and tested its applicability as an elicitor in inducing resistance factors against Alternaria solani, which causes early blight disease in Solanum lycopersicum (tomato plant). We have pre-treated tomato plants with different concentrations of sodium alginate (0.2%, 0.4%, and 0.6%) before A. solani infection. We found that sodium alginate has effectively controlled the growth of A. solani. In addition, a significant increase in the expression levels of SOD was observed in response to pathogen infection. The increased protease inhibitors activity further suggest that sodium alginate restrict the development of A. solani infection symptoms in tomato leaves. This corroborates well with the cell death analysis wherein increased sodium alginate pre-treatment results in decreased cell death. Also, the expression profile analyses reveal the induction of genes only in sodium alginate-pretreated tomato leaves, which are implicated in plant defense mechanism. Taken together, our results suggest that sodium alginate can be used as an elicitor to induce resistance against A. solani in tomato plants.<br />Competing Interests: The affiliation of Acme Progen Biotech (India) Pvt. Ltd does not alter our adherence to PLOS ONE policies on sharing data and materials.

Details

Language :
English
ISSN :
1932-6203
Volume :
14
Issue :
9
Database :
MEDLINE
Journal :
PloS one
Publication Type :
Academic Journal
Accession number :
31568481
Full Text :
https://doi.org/10.1371/journal.pone.0223216