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Study of catalase production by an Aspergillus phoenicis mutant strain in date flour extract submerged cultures

机译:枣曲霉粉浸没培养物中phoencis Aspergillus phoenicis突变菌株产生过氧化氢酶的研究

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摘要

The production of extracellular catalase in date flour submerged medium by a selected mutant Aspergillus phoenicis K30 (member of the Aspergillus niger group) was investigated. The strain was tested in 500 ml shake-flasks and in a 20 1 bioreactor withdate powder as a single carbon source. Extracellular catalase production reached 59 U ml~(-1) in both cases. This value is much greater than that of a wild-type strain (9.5 U ml~(-1)). Microscopic examination showed that the extracellular catalase production was correlated with the ramified hyphals morphology in the external layer of the pellets.
机译:研究了选定的突变体Aspergillus phoenicis K30(黑曲霉成员)在枣粉浸没培养基中产生细胞外过氧化氢酶。该菌株在500 ml摇瓶和20 1生物反应器中进行了测试,其中以粉末为单一碳源。两种情况下细胞外过氧化氢酶的产量均达到59 U ml〜(-1)。该值比野生型菌株(9.5 U ml〜(-1))大得多。显微镜检查表明,细胞外过氧化氢酶的产生与颗粒外层中分枝的菌丝形态有关。

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