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从日晒盐场结晶池中筛选到1株产C50类胡萝卜素的红色极端嗜盐古菌。该菌株为革兰氏阴性菌,短棒状,最适生长盐度为250,最适生长pH 为7。表型鉴定方法结合16S rDNA序列分析判定,该菌属于极端嗜盐古菌盐红菌属 Halorubrum,命名为 Halorubrum sp.Sp1(16S rRNA Genbank 登录号为KF697239)。根据紫外-可见光扫描特征光谱,确定该菌株主要色素为 C50类胡萝卜素。pH 8时单位细胞色素积累量最大,在盐度150~300范围内随盐度升高,单位细胞色素积累量逐渐降低。“,”An extremely halophilic C50 carotenoid-producing red archaeon was isolated from the crystalli-zer ponds in solar saltworks.The isolated strain is Gram-negative and short rod.The optimum salinity and pH for growth is 250 and 7,respectively.Phenotypic and molecular analyses of this strain indicated that it belonged to extremely halophilic archaea genus Halorubrum and named Halorubrum Sp1 (16S rRNA Genbank registration number KF697239).UV-visible scanning spectrum showed that C50 carote-noid was the major pigments presented in this strain.Pigment accumulation was maximizing at pH 8. In the salinity range of 150~300,increasing salinity resulted in declined pigment accumulation.