Linoleic acid-induced expression of defense genes and enzymes in tobacco.

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ID: 277557
2014
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Abstract
Linoleic acid (LA) is a naturally occurring fatty acid (FA) found to elicit induced systemic resistance (ISR) of tobacco against the bacterial soft rot pathogen, Pectobacterium carotovorum subsp. carotovorum (PCC). In this study, we examined effects of six doses of exogenous LA on the induction of defense genes and enzymes. The optimum ISR activity was observed in plants treated with 0.1mM LA where the effect of LA on membrane permeability was minimal. The application of LA as a root drench enhanced the activity of defense enzymes such as phenylalanine ammonia-lyase (PAL), peroxidase (POD), and polyphenol oxidase (PPO) and induced the expression of β-glucuronidase (GUS). PAL and POD activities were increased in a concentration dependent manner while the maximum PPO activity was observed after treatment with 0.01mM LA. An RT-PCR analysis of the defense-related genes, Coi1, NPR1, PR-1a and PR-1b, of tobacco plants treated with 0.1mM LA revealed an association of LA with elicitation of ISR in tobacco.
Reference Key
sumayo2014linoleicjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sumayo, Marilyn S;Kwon, Duck-Kee;Ghim, Sa-Youl;
Journal Journal of plant physiology
Year 2014
DOI
10.1016/j.jplph.2014.08.015
URL
Keywords
linoleic acid (la) defense enzymes defense genes induced systemic resistance (isr) pectobacterium carotovorum subsp. carotovorum (pcc)

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