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Negative phototropism in vaucheria terrestris regulated by calcium III. The role of calcium characterized by use of a high-power argon-ion laser as the source of unilateral blue light
https://ir.soken.ac.jp/records/3916
https://ir.soken.ac.jp/records/391628f82fbe-2e16-4b0b-a2c0-df7252e1492d
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||
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| 公開日 | 2013-08-23 | |||||||||
| タイトル | ||||||||||
| タイトル | Negative phototropism in vaucheria terrestris regulated by calcium III. The role of calcium characterized by use of a high-power argon-ion laser as the source of unilateral blue light | |||||||||
| タイトル | ||||||||||
| タイトル | Negative phototropism in vaucheria terrestris regulated by calcium III. The role of calcium characterized by use of a high-power argon-ion laser as the source of unilateral blue light | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | journal article | |||||||||
| アクセス権 | ||||||||||
| アクセス権 | metadata only access | |||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||
| 著者 |
KATAOKA, Hironao
× KATAOKA, Hironao
× WATANABE, Masakatsu
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| 著者別名 |
渡辺, 正勝
× 渡辺, 正勝
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | A tip-growing Xanthophycean algal coenocyte, Vaucheria terrestris sensu Götz, is able to change the sign of its phototropic response from positive to negative as a result of its ability to sense the fluence rate (=intensity) of unilateral blue light (BL). The mechanism that determines the sign of phototropism was investigated using a high-power argon-ion laser (457.9 nm) as a source of very strong unilateral BL. The fluence-response relationship was determined by changing both the fluence rate and the duration of irradiation. Positive phototropic bending was induced when the fluence rate of BL from the laser was below 60 W m -2. The positive bending obeyed the reciprocity law and was not affected by the concentrations of external Ca 2+ ions between 0.4 mM and 4.4 mM. The positive curvature decreased when the alga was exposed to a unilateral pulse of BL with a duration of 10-300 s at fluence rates higher than 60 W m -2. The alga finally showed a deep negative curvature when either the fluence rate or the duration of irradiation was further increased. The inversion of the phototropic response and development of the negative phototropic response was greatly enhanced in the presence of 4.4 mM Ca 2+ ions. However, the mechanism that determine the sign of phototropism seemed to require a BL pulse of longer than several seconds, even when the fluence rate was sufficiently high. The role of cytoplasmic Ca 2+ ions in positive and negative phototropic responses is discussed. | |||||||||
| 書誌情報 |
Plant and Cell Physiology en : Plant and Cell Physiology 巻 34, 号 5, p. 737-744, 発行日 1993-07 |
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| 出版者 | ||||||||||
| 出版者 | Oxford University Press | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 00320781 | |||||||||
| DOI | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | https://doi.org/10.1093/oxfordjournals.pcp.a078477 | |||||||||
| 関連名称 | 10.1093/oxfordjournals.pcp.a078477 | |||||||||
| 権利 | ||||||||||
| 権利情報 | © 1993. The Japanese Society of Plant Physiologists (JSPP). | |||||||||
