Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/12108
Title: Cloning of chitinase gene from Bacillus thuringiensis
Authors: Usharani, T R
Gowda, T K S
Keywords: Bacillus thuringiensis
Colloidal chitin
Exochitinase
Fungitoxicity
Native PAGE
Issue Date: Jul-2011
Publisher: NISCAIR-CSIR, India
Abstract: In the present investigation, 34 Bacillus thuringiensis (Bt) isolates of different agroclimatic condition were studied for fungitoxic characters and the principle involved for fungitoxicity was identified in most of the cases as exochitinases. The different Bt strains were screened for fungitoxicity and chitin degrading activity employing 4 fungal pathogens. Biochemical assay of the chitinase using glycol chitin as the substrate helped to identify the enzyme as an exochitinase. The antifungal chitinase activity on phyto-pathogenic Fusarium oxysporum f. sp. cubense was investigated in vitro by fluorescent microscopic observation. PCR was employed using chitinase gene specific primers to obtain the corresponding gene from Bt isolates. The corresponding gene was cloned and sequenced for one of the isolates and it was determined to be around 1129 bp, encoding a polypeptide of 360 amino acids. This gene was found to be highly homologous to that of chitinase of B. cereus strain 28-9.
Description: 264-269
URI: http://hdl.handle.net/123456789/12108
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.10(3) [July 2011]

Files in This Item:
File Description SizeFormat 
IJBT 10(3) 264-269.pdf300.47 kBAdobe PDFView/Open


Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.