บทคัดย่องานวิจัย

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Some pectinolytic and cellulolytic enzyme activities of fungi causing rots of cocoyams.

Ugwuanyi, J. O. and Obeta, J. A. N.

Journal of the Science of Food and Agriculture Year: 1997 Vol: 73 Issue: 4 Pages: 432-436 Ref: 19 ref.

1997

บทคัดย่อ

Some pectinolytic and cellulolytic enzyme activities of fungi causing rots of cocoyams.

Representative isolates of Aspergillus niger, Botryodiplodia theobromae, Corticium rolfsii, Geotrichum candidum, Fusarium oxysporum and F. solani recovered from rotten cocoyams (Colocasia antiquorum) were studied for the production of pectinolytic and cellulolytic enzymes. All the isolates produced high levels of hydrolase, lyase and pectinesterase in cocoyam tissue medium and lyase and pectinesterase in pectin medium. There were no significant differences 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 significantly 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 significantly high activity followed by F. oxysporum and A. niger.