Effects of High-Temperature Treatments on a Thermophilic Cyanobacterium Synechococcus vulcanus
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概要
- 論文の詳細を見る
Effects of high-temperature treatments on a thermophilic cyanobacterium, Synechococcus vulcanus, were studied, and the following results were obtained. (1)Oxygen evolution and the PSII photochemical reaction were the most sensitive sites and started to be inactivated at temperatures slightly higher than the cultivating temperature. (2)The decrease in the fluorescence F_v value reflected the inactivation of the charge separation reaction of PSII as well as that of the oxygen evolution reaction. (3)The dark fluorescence level, F_o, showed an increase at around 70℃, which was partially reversed by further incubation at 50℃. This increase reflected the inactivation of PSII reaction centers and probably dissociation of phycobilisomes from the PSII reaction center complexes. (4)At higher temperatures, phycobiliproteins disassembled and denatured in a pH-dependent manner, causing a large F_o decrease. (5)Cell membranes became leaky to low-molecular-weight substances at around 72℃. (6)Inhibition of growth of the cells was recognized when the cells were pretreated at temperatures higher than 72℃. Reversibility of the high-temperature effects and relationship between viability of the cells and the degradation of the cell membranes are discussed.
- 日本植物生理学会の論文
著者
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Kashino Yasuhiro
Department of Life Science, University of Hyogo, 3-2-1 Kohto, Kamigohri, Ako-gun, Hyogo 678-1297, Ja
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Satoh Kazuhiko
Department of Life Science, University of Hyogo, 3-2-1 Kohto, Kamigohri, Ako-gun, Hyogo 678-1297, Ja
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Yano Yoshinobu
Department Of Life Science Faculty Of Science Himeji Institute Of Technology
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山根 義宏
名古屋大学
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Kashino Yasuhiro
Department Of Life Science University Of Hyogo 3-2-1 Kohto Kamigohri Ako-gun Hyogo 678-1297 Japan
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Kashino Yasuhiro
Dept. Life Sci. Fac. Sci. Himeji Inst. Tech. Harima Science Garden City
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KOIKE Hiroyuki
Department of Life Science, Graduate School of Life Science, University of Hyogo
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INOUE Natsuko
Department of Life Science, Faculty of Science, Himeji Institute of Technology
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EMI Takashi
Department of Life Science, Faculty of Science, Himeji Institute of Technology
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YAMANE Yoshihiro
Department of Life Science, Faculty of Science, Himeji Institute of Technology
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山根 義宏
名古屋大
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Yamane Y
Nagoya Univ.
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Yamane Yoshihiro
Physics And Energy Engineering Department Of Materials Graduate School Of Engineering Nagoya Univers
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Satoh Kazuhiko
Department Of Life Science University Of Hyogo 3-2-1 Kohto Kamigohri Ako-gun Hyogo 678-1297 Japan
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Inoue Natsuko
Department Of Biology Graduate School Of Science Osaka University
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Satoh K
Department Of Life Science University Of Hyogo 3-2-1 Kohto Kamigohri Ako-gun Hyogo 678-1297 Japan
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Satoh Kazuhiko
Department Of Biology Faculty Of Science Toho University
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Koike H
Department Of Life Science Graduate School Of Life Science University Of Hyogo
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Koike Hiroyuki
Department Of Cardiovascular Surgery Juntendo University School Of Medicine
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Yamane Yoshihiro
Department Of Nuclear Engineering Nagoya University
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Kashino Yasuhiro
Department Of Botany Faculty Of Science University Of Tokyo:(present)department Of Biological Scienc
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Emi Takashi
Department Of Life Science Faculty Of Science Himeji Institute Of Technology
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Emi Takashi
Department Of Biology Faculty Of Science Kyushu University
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Koike Hiroyuki
Department Of Cardiovascular Surgery Japanese Red Cross Society Wakayama Medical Center
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