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Hemicellulase activity of antarctic microfungi
Author(s) -
Bradner J. R.,
Sidhu R. K.,
Gillings M.,
Nevalainen K. M. H.
Publication year - 1999
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1046/j.1365-2672.1999.00827.x
Subject(s) - microfungi , psychrophile , xylanase , mesophile , penicillium , phoma , strain (injury) , chemistry , food science , alternaria , botany , microbiology and biotechnology , biology , bacteria , enzyme , biochemistry , genetics , anatomy
The mannanase (endo‐β‐1,4‐mannanase; E.C. 3.2.1.78) and xylanase (endo‐β‐1,4‐xylanase; E.C. 3.2.1.8) activity of five microfungal isolates from Antarctica were characterized at different temperatures and pH. In general, the hemicellulase activity of the antarctic strains occurred at least 10 °C and as much as 30 °C lower than that of a mesophilic reference strain. At 0 °C, two strains, a Phoma and a Penicillium , produced in excess of 40% of their measured maximum activity of mannanase. All strains had maximum hemicellulase activity in the range pH 4–5, with Penicillium , Phoma and Alternaria strains exhibiting high (in excess of 80% of maximum) mannanase activity at pH 10. Three of the antarctic isolates exhibited high levels of xylanase activity over a pH range of 3–11.