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Effects of an alternative oxidase gene on conidia viability under external stresses in Monascus ruber M7

文献类型: 外文期刊

作者: Shao, Yanchun 1 ; Li, Qi 1 ; Zhou, Youxiang 2 ; Chen, Fusheng 1 ;

作者机构: 1.Huazhong Agr Univ, Coll Food Sci & Technol, Wuhan, Hubei Province, Peoples R China

2.Hubei Acad Agr Sci, Inst Qual Stand & Testing Technol Agroprod, Wuhany, Hubei Province, Peoples R China

3.Huazhong Agr Univ, Key Lab Environm Correlat Dietol, Minist Educ, 1 Shizishan St, Wuhan 430070, Hubei Province, Peoples R China

关键词: alternative oxidase;conidia germination rate;Monascus ruber

期刊名称:JOURNAL OF BASIC MICROBIOLOGY ( 影响因子:2.281; 五年影响因子:2.516 )

ISSN: 0233-111X

年卷期: 2017 年 57 卷 5 期

页码:

收录情况: SCI

摘要: Monascus species can produce natural edible pigments and many other bioactive metabolites. In this study, mraox gene (Monascus ruber alternative oxidase) was isolated, sequenced, and replaced in order to investigate the function in resistance of conidia to stressful conditions. The derived protein of the mraox gene consisted of 350 amino acids with a conserved ferritin-like diiron-binding domain at the C-terminus, sharing a high homolog with alternative oxidase proteins in other filamentous fungi. Deletion of mraox gene repressed the conidia germination rate (CGR) when conidia were exposed to H2O2, high temperature (40 and 50 degrees C) and alkerline buffer (pH8.0), but CGR of mraox-deleted strain was not decreased when the conidia were treated with NaCl, acid buffer (citric acid-dibasic sodium phosphate buffer, pH3) compared to that of the wild-type strain, suggesting that mraox gene is partially responsible for the resistance of conidia to stressful conditions in M. ruber.

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