Laccase activity and maceration of lupin tissue by Rhizoctonia solani is inhibited by arginine

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Contents Vol 34(4)

doi:10.1071/AP05077

Laccase activity and maceration of lupin tissue by Rhizoctonia solani is inhibited by arginine

P. Bora ^A, G. E. St J. Hardy ^A, P. A. O’Brien ^A ^B

^A School of Biological Sciences and Biotechnology, Murdoch University, Perth, WA 6150, Australia.
^B Corresponding author. Email: obrien@murdoch.edu.au





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Australasian Plant Pathology 34(4) 591–594 http://dx.doi.org/10.1071/AP05077
Submitted: 22 November 2004 Accepted: 2 August 2005 Published online: 2 December 2005

Abstract

The role of Rhizoctonia solani laccase in the maceration of plant tissue was investigated. Extracellular enzymes produced by R. solani were found to macerate lignified lupin radicle and non-lignified potato tuber tissue. Arginine inhibited maceration of lupin radicle but not potato tuber tissue. Arginine inhibited laccase activity but had no effect on the activity of cellulase, pectinase or xylanase.

Keywords: laccase, pathogenicity factor, Rhizoctonia, tissue maceration.