Thermostable xylanases produced at 37 degrees C and 45 degrees C by a thermotolerant Aspergillus strain

被引：25

作者：

Castro, LPM ^{[1
]}

TrejoAguilar, BA ^{[1
]}

Osorio, GA ^{[1
]}

机构：

[1] UNIV NACL AUTONOMA MEXICO, FAC CHEM, DEPT FOOD SCI & BIOTECHNOL, CONJ E, MEXICO CITY 04510, DF, MEXICO

来源：

FEMS MICROBIOLOGY LETTERS | 1997年 / 146卷 / 01期

关键词：

xylanolytic system; Aspergillus FP-470; temperature stress;

D O I：

10.1016/S0378-1097(96)00460-0

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Differences between xylanases produced by Aspergillus FP-470 growing under normal (37 degrees C) and temperature stress conditions (45 degrees C) were evaluated. Fungal growth at 45 degrees C was seriously affected. However, the xylanase specific activity was 2.5 times higher than that produced at 37 degrees C. Optimum pH and temperature were 6.5, 80 degrees C and 4.3, 50 degrees C for the xylanases produced at 37 degrees C and 45 degrees C, respectively. Electrophoresis showed that a more complex xylanolytic system was produced at 37 degrees C. Stress induced by temperature produced a decrease in the number of extracellular xylanases released by fungi, but increased the production of some xylanases, possibly essential for growth under stress conditions.

引用

页码：97 / 102

页数：6

共 11 条

[1] INFLUENCE OF PH ON ENDOPECTINASE AND EXOPECTINASE PRODUCTION BY ASPERGILLUS SP CH-Y-1043 [J].