Journal ArticleDOI
Characterization of Trichoderma spp. antagonistic to Phytophthora colocasiae associated with leaf blight of taro
Vishnu Sukumari Nath,Neetha Soma John,Indira Parameswaran Anjanadevi,Vinayaka Hegde,M. L. Jeeva,Raj Shekhar Misra,S S Veena +6 more
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TLDR
The most potent strain overall (TR7) identified as T. harzianum was able to control P. colocasiae in vivo also and could be used as a promising candidate for biological control of taro leaf blight disease.Abstract:
Eighteen Trichoderma strains isolated from soils of different regions of India were analyzed for their biocontrol potential against the taro leaf blight pathogen Phytophthora colocasiae. The strains were characterized using a combination of phenotypic and molecular approaches, viz., in vitro antagonism, extracellular enzyme production, ITS and tef1 gene sequencing and AFLP analysis. Eight isolates exhibited more than 75 % inhibition of the pathogen P. colocasiae. Differential antagonistic activity was evident for different strains. Assay of lytic enzyme production suggested the role of glucanase in mycoparasitism of P. colocasiae. Sequencing and phylogenetic analysis of the Trichoderma strains showed that isolates belong to three species: Trichoderma asperellum, Trichoderma longibrachiatum and Trichoderma harzianum. AFLP analysis revealed profound genetic diversity among the isolates. The most potent strain overall (TR7) identified as T. harzianum was able to control P. colocasiae in vivo also. This isolate could be used as a promising candidate for biological control of taro leaf blight disease.read more
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Book ChapterDOI
Biocontrol Potential of Trichoderma spp.: Current Understandings and Future Outlooks on Molecular Techniques
TL;DR: The molecular mechanisms of Trichoderma that helps the plant in growth promotion as well as pathogen defense are discussed.
Journal ArticleDOI
Trichoderma atroviride LZ42 releases volatile organic compounds promoting plant growth and suppressing Fusarium wilt disease in tomato seedlings
TL;DR: A coconut-scented antagonistic Trichoderma strain LZ42, previously isolated from Ganoderma lucidum-cultivated soil, was investigated for biostimulatory and biocontrol functions in tomato seedlings as mentioned in this paper .
Journal ArticleDOI
Trichoderma atroviride LZ42 releases volatile organic compounds promoting plant growth and suppressing Fusarium wilt disease in tomato seedlings
TL;DR: A coconut-scented antagonistic Trichoderma strain LZ42, previously isolated from Ganoderma lucidum-cultivated soil, was investigated for biostimulatory and biocontrol functions in tomato seedlings as mentioned in this paper .
Journal ArticleDOI
Gamma irradiation induces genetic variation and boosting antagonism in Trichoderma aureoviride
TL;DR: Five mutants showing lowest genetic similarities with the wild-type demonstrated improvement in their biocontrol capabilities as revealed by in vitro assays.
Journal Article
Comparative Analysis of Antimicrobial Activities of 43 Trichoderma Isolates Against Sclerotium rolfsii, the Pathogen Causing Collar Rot Disease in Elephant Foot Yam
TL;DR: It was concluded that the isolates, T38, T36, T32, T40 and T6 have excellent potential to be used as bio-control agents to mitigate the crop loss caused by S. rolfsii.
References
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Naruya Saitou,Masatoshi Nei +1 more
TL;DR: The neighbor-joining method and Sattath and Tversky's method are shown to be generally better than the other methods for reconstructing phylogenetic trees from evolutionary distance data.
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