Molecular characterization of multiple xylanase producing thermophilic/thermotolerant fungi isolated from composting materials
Open Access
- 14 April 2008
- journal article
- Published by Oxford University Press (OUP) in Letters in Applied Microbiology
- Vol. 46 (5), 526-535
- https://doi.org/10.1111/j.1472-765x.2008.02357.x
Abstract
Aims: Molecular characterization of commercially important group of xylanase producing thermophilic/thermotolerant fungi. Methods and Results: DNA from 16 thermophilic/thermotolerant fungal isolates was amplified by PCR using three sets of primers: (i) internal transcribed spacer sequence (ITSI‐5·8S‐ITSII), (ii) D1/D2 hyper variable region of 26S rDNA and (iii) 18S rDNA region. The amplified products of internal transcribed spacers (ITS) and D1/D2 region were sequenced and analysed using ClustalX, whereas, amplified 18S rDNA region was subjected to RFLP analysis based on restriction digestion with RsaI, MboI and Hinf I. Conclusions: The sequence based analyses of ITSI‐5·8S‐ITSII as compared with D1/D2 region of 26–28S rDNA was found to be a better tool for phylogenetic resolution of thermophilic/thermotolerant fungi. The ITSI‐5·8S‐ITSII sequence‐based dendrogram indicates an early divergence of the alkaline active xylanase producing thermophilic fungal strains. Significance and Impact of the Study: This study was the first report on phylogenetic characterization of thermophilic/thermotolerant fungi.Keywords
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