Abstract
To induce the systemic resistance in capsicum against Colletotrichum truncatum an experiment was conducted with two biocontrol agents viz., Trichoderma harzianum and Trichoderma asperellum in pot culture. The induced resistance was monitored by increase in activities of five defense related enzymes viz., peroxidase (PO), polyphenol oxidase (PPO) phenylalanine ammonia lyase (PAL), catalase (CAT), and superoxide dismutase (SOD) and the accumulation of phenols and β -1,3-glucanase were also noticed in capsicum upon challenge inoculation with C. truncatum, the causal agent for anthracnose or fruit rot in capsicum. The activities of defense enzymes reached a peak at eight days after inoculation (DAI) with the pathogen. Native PAGE analysis revealed the expression of an additional isoforms of PO and PPO were observed in biocontrol agents treated seedlings due to induced systemic resistance (ISR) introduction. Prior treatment of capsicum seedlings with biocontrol agents triggered the plant defense mechanism in response to infection by C. capsici. Hence, it is speculated that among the various direct antagonistic tools, ISR is also the one indirect tool by which the tested biocontrol agents afforded resistance to capsicum against the pathogen.
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Claims 5
Claim · model-written summary
Defense enzyme activities and phenols and glucanase increased after pathogen challenge in capsicum.
- Treatment
- challenge inoculation with C. truncatume0
- Interactor
- C. truncatumColletotrichum truncatume0pathogen
- Outcome
- activities of five defense related enzymese0
- Direction
- increasee0
CapsicumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The induced resistance was monitored by increase in activities of five defense related enzymes viz., peroxidase (PO), polyphenol oxidase (PPO) phenylalanine ammonia lyase (PAL), catalase (CAT), and superoxide dismutase (SOD) and the accumulation of phenols and β -1,3-glucanase were also noticed in capsicum upon challenge inoculation with C. truncatum”
Claim · model-written summary
Defense enzyme activity peaked eight days after pathogen inoculation.
Not reportedTaxon
Verbatim
e0“The activities of defense enzymes reached a peak at eight days after inoculation (DAI) with the pathogen.”
Claim · model-written summary
Additional PO and PPO isoforms appeared in biocontrol-treated seedlings.
- Organ / stage
- seedlingse0
- Treatment
- biocontrol agentse0
- Gene
- PO and PPOe0
- Outcome
- expression of an additional isoforms of PO and PPOe0
Not reportedTaxon
Verbatim
e0“expression of an additional isoforms of PO and PPO were observed in biocontrol agents treated seedlings”
Claim · model-written summary
Prior biocontrol treatment triggered capsicum defenses against C. capsici infection.
- Treatment
- biocontrol agentse0
- Interactor
- C. capsiciColletotrichum truncatume0pathogen
- Outcome
- plant defense mechanisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Prior treatment of capsicum seedlings with biocontrol agents triggered the plant defense mechanism in response to infection by C. capsici.”
Claim · model-written summary
The authors speculate that induced systemic resistance indirectly contributes to biocontrol protection.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is speculated that among the various direct antagonistic tools, ISR is also the one indirect tool by which the tested biocontrol agents afforded resistance to capsicum against the pathogen.”
The same questions in other papers
Colletotrichum truncatum · physiology: enzyme activity · Capsicum (peppers)Results agree
2 papers in the same direction as this paper
- positive
- positive
inoculation · physiology: enzyme activity · Capsicum (peppers)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.