Production of xylanases by Aspergillus fumigatus and Aspergillus oryzae on xylan-based media

Michael Bailey, Liisa Viikari

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)

Abstract

Aspergillus fumigatus and A. oryzae were cultivated in laboratory fermenters on media containing xylan as the main carbon source. A. fumigatus produced xylanase on unsubstituted, insoluble beech xylan but growth and enzyme production on soluble xylo-oligosaccharides from the steaming of hardwood were poor due to the presence of inhibitors. An essential prerequisite for good xylanase production by A. fumigatus was decrease in the pH of the cultivation below 3.0 At higher pH values, the production of proteolytic enzymes caused degradation of the xylanase activity already produced. A. oryzae produced rather less xylanase activity than A. fumigatus on the beech xylan medium but, after adaptation, was capable of efficient enzyme production on the steamed substrate.

Original languageEnglish
Pages (from-to)80 - 84
Number of pages5
JournalWorld Journal of Microbiology and Biotechnology
Volume9
Issue number1
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

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