Abstract: Deinococcus radiodurans is Gram positive bacterium, possessing special cell structure. The genome comprises two chromosomes and two plastids, and the GC content is relatively high. Distincting from other Deinococcus bacteria, D. radiodurans is amenable to genetic manipulation owing to its natural transformability and the cells are competent throughout the exponential growth stage. Duing to unique structure and strong repair systems, D. radiodurans has strong ionizing radiation resistance, UV resistance, oxidation resistance, drought resistance and other characteristics, having great research and application value.

Key words: Deinococcus radiodurans, ionizing radiation resistance, UV resistance, oxidation resistance, drought resistance

摘要： 耐辐射异常球菌是革兰氏阳性菌,具有独特的细胞结构特征。基因组由两条染色体和两个质粒构成,GC含量较高。与异常球菌属的其他菌种不同,耐辐射异常球菌在整个指数生长期细胞都处于感受态,易于遗传操作。由于具有独特的细胞结构和超强的修复系统,耐辐射异常球菌具有超强电离辐射抗性、UV抗性、氧化抗性、干旱抗性等特征,极具研究和应用价值。

关键词: 耐辐射异常球菌, 电离辐射抗性, UV抗性, 氧化抗性, 干旱抗性