Action Spectrum of Light Pulse-Induced Membrane Depolarization in Pulvinar Motor Cells of Phaseolus
スポンサーリンク
概要
- 論文の詳細を見る
In addition to circadian changes in the membrane potential and leaf movement, light applied to the pulvinus causes changes in both the membrane potential and the pulvinar movement in Phaseolus vulgaris L. Even after a short pulse of light, a transient depolarization of the membrane occurs and leaf movement is observed. Decreases of turgor pressure of the motor cells are always preceded by the depolarization. The direction of the leaf movement can be explained by the decrease of turgor pressure in the motor cells on the irradiated side of the pulvinus. Using the Okazaki Large Spectrograph at the National Institute for Basic Biology, we determined the action spectrum of the membrane depolarization induced by light pulses (30 s) in motor cells of Phaseolus. The pulvinus was left exposed to air during measurement of the membrane potential with microelectrodes. The action spectrum obtained was in the range of 300 to 730 nm. It had the highest peak at 460 mu with lower peaks at 380 nm and 420 nm. Almost no sensitivity was observed at wavelengths shorter than 360 nm and longer than 520 nm. Red and far-red light had no effect on the depolarization of the motor cell. The features of the action spectrum are almost the same as those of the Blue-Type response in plants.
- 日本植物生理学会の論文
著者
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渡辺 正勝
岡崎国立共同研究機構基礎生物学研究所
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KUBOTA Masatsugu
School of Agriculture, Ibaraki University
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Watanabe Masakatsu
Nibb
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Watanabe Masakatsu
Large Spectrograph Laboratory National Institute For Basic Biology
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Kubota M
Large Spectrograph Laboratory National Institute For Basic Biology
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Nishizaki Yuichiro
Faculty of Humanities and Sciences, Kobe Gakuin University
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Kubota Mamoru
Large Spectrograph Laboratory, National Institute for Basic Biology
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Yamamiya Kimiko
Large Spectrograph Laboratory, National Institute for Basic Biology
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Yamamiya Kimiko
Large Spectrograph Laboratory National Institute For Basic Biology
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Nishizaki Y
Kobe Gakuin Univ. Kobe Jpn
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Nishizaki Yuichiro
Faculty Of General Education Kobe Gakuin University
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