Abstract
Six Trichoderma strains (collected from IARI, New Delhi and MTCC, Chandigarh) were tested for their ability to inhibit soil-borne pathogen of groundnut mainly Sclerotium rolfsii (causing stem rot on groundnut). In vitro percent growth inhibition of S. rolfsii by various Trichoderma strains were recorded at 5th day after inoculation (DAI). Results obtained from the antagonism study indicated that Trichoderma viride (NBAII Tv 23) inhibited 61% growth of phytopathogenic fungi S. rolfsii followed by Trichoderma harzianum (NBAII Th1) (55% growth inhibition of pathogen). The specific activities of cell wall degrading enzymes chitinase, β-1,3 glucanase, protease and cellulase were tested during different incubation period (48, 72 and 96 h) when Trichoderma spp. grew in the presence of pathogen cell wall in synthetic media. The antagonist T. viride (NBAII Tv 23) induced higher chitinase and protease activity. The growth inhibition of pathogen during antagonism were positively correlated with coiling pattern of antagonists at 14th day after inoculation (DAI) as well as with the induction of chitinase, β-1,3 glucanase and total phenol content. However, the amount of cellulase and polygalacturonase recorded was least in these antagonists treatment. A significant positive correlation (p = 0.01) between percentage growth inhibition of test fungus and lytic enzymes (chitinase, β-1,3-glucanase and protease) in the culture medium of antagonist treatment established a relationship to inhibit growth of fungal pathogen by increasing the levels of these enzymes. Among all the tested Trichoderma strains, T. viride (NBAII Tv 23) was found to be the best strain to be used in biological control of plant pathogen S. rolfsii. Key words: Antagonism, soil-borne pathogens, lytic enzyme, Trichoderma, biocontrol agent.
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Claims 8
Claim · model-written summary
Trichoderma viride (NBAII Tv 23) inhibited growth of Sclerotium rolfsii by 61% in vitro
- Taxon
- groundnut
Arachis hypogaeat0 - Treatment
- Trichoderma viride (NBAII Tv 23)e1
- Interactor
- S. rolfsii
Agroathelia rolfsiie1pathogen - Second interactor
- Trichoderma viride (NBAII Tv 23)
Trichoderma viridee1biocontrol_agent - Outcome
- growth of phytopathogenic fungie1
- Direction
- inhibitede1
- Value
- 61%e1
- Setting
- in vitrot0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Trichoderma viride (NBAII Tv 23) inhibited 61% growth of phytopathogenic fungi S. rolfsii”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Trichoderma harzianum (NBAII Th1) inhibited growth of Sclerotium rolfsii by 55% in vitro
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- Trichoderma harzianum (NBAII Th1)e2
- Interactor
- Sclerotium rolfsiiAgroathelia rolfsiit0pathogen
- Second interactor
- Trichoderma harzianum (NBAII Th1)
Trichoderma harzianume2biocontrol_agent - Outcome
- growth inhibition of pathogene2
- Direction
- decreaseinferrede2
- Value
- 55%e2
- Setting
- in vitrot0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“followed by Trichoderma harzianum (NBAII Th1) (55% growth inhibition of pathogen)”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Trichoderma viride (NBAII Tv 23) induced higher chitinase and protease activity
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- T. viride (NBAII Tv 23)e3
- Outcome
- chitinase and protease activitye3
- Direction
- highere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The antagonist T. viride (NBAII Tv 23) induced higher chitinase and protease activity”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Growth inhibition of the pathogen was positively correlated with the coiling pattern of the antagonists at 14 days after inoculation
- Taxon
- groundnutArachis hypogaeat0
- Interactor
- pathogene4pathogen
- Second interactor
- antagonistse4biocontrol_agent
- Outcome
- growth inhibition of pathogene4
- Direction
- positively correlatede4
- Qualifier
- coiling pattern of antagonists at 14th day after inoculatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The growth inhibition of pathogen during antagonism were positively correlated with coiling pattern of antagonists at 14th day after inoculation (DAI) as well as with the induction of chitinase, β-1,3 glucanase and total phenol content”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Growth inhibition of the pathogen was positively correlated with induction of chitinase, beta-1,3 glucanase and total phenol content
- Taxon
- groundnutArachis hypogaeat0
- Interactor
- pathogene4pathogen
- Outcome
- induction of chitinase, β-1,3 glucanase and total phenol contente4
- Direction
- positively correlatede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The growth inhibition of pathogen during antagonism were positively correlated with coiling pattern of antagonists at 14th day after inoculation (DAI) as well as with the induction of chitinase, β-1,3 glucanase and total phenol content”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Cellulase and polygalacturonase amounts were least in the antagonist treatments
- Taxon
- groundnutArachis hypogaeat0
- Treatment
- antagonists treatmente5
- Outcome
- amount of cellulase and polygalacturonasee5
- Direction
- leaste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“However, the amount of cellulase and polygalacturonase recorded was least in these antagonists treatment”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Percentage growth inhibition of the test fungus was significantly and positively correlated with lytic enzyme levels
- Taxon
- groundnutArachis hypogaeat0
- Interactor
- test funguse6pathogen
- Outcome
- percentage growth inhibition of test funguse6
- Direction
- positive correlatione6
- Qualifier
- p = 0.01e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“A significant positive correlation (p = 0.01) between percentage growth inhibition of test fungus and lytic enzymes (chitinase, β-1,3-glucanase and protease)”
t0“during in vitro antagonism with Sclerotium rolfsii, the causal agent of stem rot of groundnut”
Claim · model-written summary
Trichoderma viride (NBAII Tv 23) is the best strain for biological control of Sclerotium rolfsii
- Taxon
- groundnutArachis hypogaeat0
- Interactor
- S. rolfsiiAgroathelia rolfsiie7pathogen
- Second interactor
- T. viride (NBAII Tv 23)Trichoderma viridee7biocontrol_agent
- Outcome
- best strain to be used in biological controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“T. viride (NBAII Tv 23) was found to be the best strain to be used in biological control of plant pathogen S. rolfsii”
t0“the causal agent of stem rot of groundnut”
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See all 5 papers →Trichoderma harzianum · Agroathelia rolfsii · Arachis hypogaea (peanut)Results agree
4 papers in the same direction as this paper
- positive
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See all 5 papers →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.