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KMID : 1024520080170040469
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Journal of the Environmental Sciences
2008 Volume.17 No. 4 p.469 ~ p.477
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Isolation and Characteristics of Photosynthetic Bacterium, Erythrobacter longus SY-46 which Produces Bacterial Carotenoids
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Kim Yun-Sook
Lee Dae-Sung
Jeong Seong-Yun
Lee Won-Jae
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Abstract
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The aerobic photosynthetic bacterium, which produces bacterial carotenoids was isolated and identified from coastal marine environments. This bacterium was identified by 16S rDNA sequencing and designated as Erythrobacter longus SY-46. E. longus SY-46 was Gram negative and rod shape, and the optimal culture conditions were , pH 7.0, and 3.0% NaCl concentration, respectively. The carbon and nitrogen sources required for the optimal growth were lactose and tryptone, respectively. Fatty acid compositions of E. longus SY-46 were (78.32%), v-linolenic acid(), margaric acid(: 3.38%), palmitic acid(: 3.07%), and docosahexaenoic acid(: 2.21%). In addition, E. longus SY-46 showed the characteristic absorption peaks of bacterial carotenoids(in the region of 450 to 480 nm) and bacteriochlorophyll(770 to 772 nm). Major carotenoids of E. longus SY-46 were polyhydroxylated xanthophylls such as fucoxanthin and zeaxanthin.
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KEYWORD
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Aerobic photosynthetic bacterium, Bacterial carotenoids, Bacteriochlorophyll, Erythrobacet longus SY-46
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