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Some Pectinolytic and Cellulolytic Enzyme Activities of Fungi Causing Rots of Cocoyams

✍ Scribed by J Obeta Ugwuanyi; Jason A N Obeta

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
172 KB
Volume
73
Category
Article
ISSN
0022-5142

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✦ Synopsis

Representative isolates of Aspergillus niger, Botryodiplodia theobromae, Corticium rolfsii, Geotrichum candidum, Fusarium oxysporum and F solani recovered from rotten cocoyams were studied for the production of pectinolytic and cellulolytic enzymes. All the isolates elaborated high levels of hydrolase, lyase and pectinesterase in cocoyam tissue medium and lyase and pectinesterase in pectin medium. There were no signiÐcant di †erences in the overall levels of lyase and pectinesterase activities produced by all the isolates in both media. The level of hydrolase, lyase and pectinesterase activities individually produced by A niger, B theobromae and C rolfsii in both media was signiÐcantly higher than that of any other isolate. The highest hydrolase activity was produced by C rolfsii in cocoyam medium while A niger produced the highest lyase activity in pectin medium. Maximum pectinesterase activity was obtained from B theobromae and C rolfsii in pectin medium. All the test isolates produced cellulase in a medium containing carboxymethyl cellulose with C rolfsii showing signiÐcantly high activity followed by F oxysporum and A niger.

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