タカベ　ユキ   TAKABE Yuki   高部 由季    所属   専修大学  経済学部    職種   講師
言語種別	英語
発行・発表の年月	2012/05
形態種別	研究論文
査読	査読あり
標題	Photosynthetic characteristics of marine aerobic anoxygenic phototrophic bacteria Roseobacter and Erythrobacter strains
執筆形態	未選択
掲載誌名	ARCHIVES OF MICROBIOLOGY
出版社・発行元	SPRINGER
巻・号・頁	194(5),pp.331-341
担当区分	筆頭著者,責任著者
著者・共著者	Yuki Sato-Takabe,Koji Hamasaki,Koji Suzuki
概要	A coastal Roseobacter strain of marine aerobic anoxygenic phototrophic bacteria (AAnPB) was isolated and phylogenetically determined. The strain OBYS 0001 was characterized by its physiological and biochemical properties with reference to the Erythrobacter longus type strain NBRC 14126. When grown in batch cultures, the growth curves of the both strains were similar. Cellular bacteriochlorophyll a concentrations of the strains reached the maxima in the stationary growth conditions. In vivo fluorescence excitation/optical density spectra between 470 and 600 nm for OBYS 0001 represented higher values than NBRC 14126. Variable fluorescence measurements revealed that the functional absorption cross section (sigma) of the bacterial photosynthetic complexes for OBYS 0001 was significantly higher than that for NBRC 14126 under green excitation. These results suggest that Roseobacter can capture green light more efficiently than Erythrobacter for photosynthesis. The photochemical quantum efficiencies (F (v)/F (m)) of the bacterial photosynthetic complexes for OBYS 0001 were consistently lower than those for NBRC 14126. A relationship between the growth rate and F (v)/F (m) was significant for OBYS 0001, but that was not found for NBRC 14126. These results suggested that F (v)/F (m) for AAnPB could not be used as a proxy of the growth rate which is consistent with their mostly heterotrophic characters.
DOI	10.1007/s00203-011-0761-2
ISSN	0302-8933