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Annals of Botany 39: 331-335, 1975
© 1975 Annals of Botany Company

RESEARCH-ARTICLE

A Cell Wall-degrading {alpha}-1,3-arabinofuranosidase Produced by the Potato Dry Rot Pathogen Fusarium caeruleum (Lib.) Sacc.

M. L. STURDY1 and A. L. J. COLE2

1Richard Hodgson Tanning Products Ltd P.O. Box No 5, Flemingate, Beverley, North Humberside
2Botany Department, University of Canterbury Christchurch, New Zealand

Received: 20 May 1974   

Fusarium caeruleum produced an arabanase which showed maximal activity at pH 3·5 and which liberated arabinose and its oligomers from {alpha}-l,3-arabinofuranan and isolated potato tuber parenchyma cell walls. This enzyme was most active in dry rot lesions produced in susceptible potato tubers by a fast-growing isolate of F. caeruleum. This arabanase is not of primary importance in causing tissue maceration, protoplast death or electrolyte loss but it may play a secondary role in these processes.


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