| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2013-08-14 |
| タイトル |
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タイトル |
Photomovement of the gliding cyanobacterium Synechocystis sp. PCC 6803 |
| タイトル |
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タイトル |
Photomovement of the gliding cyanobacterium Synechocystis sp. PCC 6803 |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
| 著者 |
CHOI, Jong-Soon
CHUNG, Young-Ho
MOON, Yoon-Jung
KIM, Changhoon
WATANABE, Masakatsu
Song, Pill-Soon
JOE, Cheol-O
BOGORAD, Lawrence
PARK, Young Mok
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| 著者別名 |
渡辺, 正勝
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Using a computerized videomicroscope motion analysis system, we investigated the photomovements of two Synechocystis sp. (PCC 6803 and ATCC 27184). Synechocystis sp. PCC 6803 displays a relatively slow gliding motion. The phototactic and photokinetic speeds of this cyanobacterium in liquid media were 5 μm/min and 15.8 μm/ min, respectively, at 3 μmol/m2/s of stimulant white light. Synechocystis sp. PCC 6803 senses light direction rather than intensity for phototaxis. Synechocystis sp. ATCC 27184 showed a weak photokinesis but no phototaxis. Analysis of Synechocystis sp. ATCC 27184 suggests that the loss of phototaxis results from spontaneous mutation during several years of subculture. When directional irradiation was applied, the cell population of Synechocystis sp. PCC 6803 began to deviate from random movement and reached maximum orientation at 5 min after the onset of stimulant white light Synechocystis sp. PCC 6803 showed high sensitivity to the stimulant white light of fluence rates as low as 0.002 μmol/m2/s. Neither 1,3-dichlorophenyldimethyl urea nor cyanide affected phototactic orientation, whereas cyanide inhibited gliding speed. This result suggests that the phototaxis of Synechocystis sp. PCC 6803 is independent of photosynthetic phosphorylation and that its gliding movement is primarily powered by oxidative phosphorylation. In the visible wavelength region, 560 nm, 660 run and even 760 nm caused positive phototaxis. However, 360 nm light induced strikingly negative phototaxis. Therefore, at least two independent photoreceptors may exist to control phototaxis. The photoreceptor for positive phototaxis appears likely to be a phytochrome-like tetrapyrrole rather than chlorophyll a. |
| 書誌情報 |
Photochemistry and Photobiology
en : Photochemistry and Photobiology
巻 70,
号 1,
p. 95-102,
発行日 1999-07
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| 出版者 |
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出版者 |
Wiley-Blackwell |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
00318655 |
| PubMed番号 |
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識別子タイプ |
PMID |
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関連識別子 |
10420848 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1111/j.1751-1097.1999.tb01954.x |
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関連名称 |
10.1111/j.1751-1097.1999.tb01954.x |
| 権利 |
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権利情報 |
© 1999 The Authors. Photochemistry and Photobiology © 1999 The American Society of Photobiology |
