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Mechanism of Biocontrol of Aspergillus flavus in Groundnut by Species of Trichoderma

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http://www.connectjournals.com/toc2.php?abstract=1255302H_249-254a.pdf&&bookmark=CJ-000953&&issue_id=02&&yaer=2011
 
Title Mechanism of Biocontrol of Aspergillus flavus in Groundnut by Species of Trichoderma
 
Creator Srilakshmi, P
Thakur, R P
Satyaprasad, K
 
Subject Groundnut
Genetics and Genomics
Plant Pathology
 
Description Aflatoxin contamination of groundnut by Aspergillus flavus is a serious problem affecting the quality and
commercial value of groundnut kernels. Biological management of A. flavus infection at pre- and post-harvest levels
by using species of Trichoderma is a promising approach. Trichoderma isolates from the fields of Andhra Pradesh
and Karnataka states of India were evaluated for their ability to control A. flavus (strain Af 11-4) in the laboratory.
Out of 212 isolates of Trichoderma, 36 were potent antagonists and these were analyzed for the production of
volatile and diffusible antibiotics. Twenty-one of the 36 isolates produced volatile antibiotics and 15 produced
diffusible antibiotics. Biocontrol mechanism of their action was analyzed by estimating extracellular enzyme
production viz, chitinase, protease and glucanase. Maximum chitinase activity was associated with the isolate T.
viride (Tv 24), T. pseudokoningii (Tp 29) and T. harzianum (Th 42). T. harzianum showed a maximum protease
activity while T. koningii (Tk 83) and T. longibrachiatum (Tl 102) produced glucanases in the presence of glucose.
 
Publisher Indian Society of Mycology and Plant Pathology
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6000/1/JMycolPlantPathol_41_2_2011.pdf
Srilakshmi, P and Thakur, R P and Satyaprasad, K (2011) Mechanism of Biocontrol of Aspergillus flavus in Groundnut by Species of Trichoderma. Journal of Mycology and Plant Pathology, 41 (2). pp. 249-254. ISSN 0971-9393