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Induced systemic resistance (ISR) in hot pepper against Phytophthora capsici infection triggered by cell wall oligosaccharide elicitors from Trichoderma species

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Title Induced systemic resistance (ISR) in hot pepper against Phytophthora capsici infection triggered by cell wall oligosaccharide elicitors from Trichoderma species
Not Available
 
Creator M. J. Savitha
S. Sriram
 
Subject Elicitors, hot pepper, induced systemic resistance (ISR), Phytophthora capsici, Trichoderma.
 
Description Induced systemic resistance, one of the mechanisms of biological control is elicited either by oligosaccharides
or glycoproteins released from cell wall of fungal bioagents like Trichoderma species. Oligosaccharide elicitors
from 10 Trichoderma isolates having biocontrol potential were tested for their ability to elicit ISR in hot pepper
against Phytophthora capsici infection. Treatment with elicitors from isolates Th10, Th9, Th33 and Th28 reduced
P. capsici infection in hot pepper by 70-80% compared to 100% infection in pathogen inoculated control. Assays
of peroxiase (PO), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL) and glucanase revealed that
elicitor treatment significantly induced higher enzyme activity in elicitor treated plants compared to control.
Induction of more number of isoforms of PO and PPO was also observed. Elicitors from Th10 and Th33 induced
two fold increase in PPO and PAL and three-fold increase in PO, while Th28 and Th9 increased PPO and glucanase
by two folds. Different enzymes (involved in phenyl propanoid metabolism or hydryolytic enzymes) contributed
to ISR in different isolates
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Date 2019-03-20T10:15:31Z
2019-03-20T10:15:31Z
2017-06-01
 
Type Article
 
Identifier Savitha, M.J. and Sriram, S., 2017. Induced systemic resistance (ISR) in hot pepper against Phytophthora capsici infection triggered by cell wall oligosaccharide elicitors from Trichoderma species. The Horticultural Society of India (Regd.), 74(2), pp.233-239.
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http://krishi.icar.gov.in/jspui/handle/123456789/17575
 
Language English
 
Relation Not Available;
 
Publisher The Horticultural Society of India