Blue Light-Induced Phototropic Response and the Intracellular Photoreceptive Site in Adiantum Protonemata
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概要
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Blue light-induced phototropism in Adiantum protonemata was investigated with microbeam irradiation. Brief irradiation with blue light effectively induced a phototropic response when it was applied to a half-side of the apical 200 μm region of a protonema. The phototropic response was partly reversed by the subsequent far-red light irradiation but the full reversal of the response was not observed even when the fluence of far-red light was increased. In the far-red reversible part of the response, blue/far-red photoreversibility was repeatedly observed. Thus, both phytochrome and a blue light-absorbing pigment (other than phytochrome) seem to be involved in the blue light-induced phototropic response in Adiantum protonemata. Furthermore, detailed studies of the far-red light effect on the fluence-response curve for blue light-induced phototropism revealed that the concomitant mediation by the two receptors was limited to the response in the relatively higher fluence range of blue light and that the blue light-absorbing pigment alone was responsible in the lower fluence range. In the higher fluence range, the response mediated by the blue light-absorbing pigment became saturated and the phytochrome response became evident, indicating a difference in the sensitivities of the two receptor pigments to blue light. When various regions of half-sides of protonemata were irradiated with a blue microbeam of 10 μm width, irradiation at the apical 5-25 μm region was most effective both for phytochrome- and blue light-absorbing pigment-mediated response, indicating that the site of blue light perception is almost identical for each response.
- 日本植物生理学会の論文
著者
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WADA Masamitsu
Department of Regulatory Biology, National Institute for Basic Biology
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Wada Masamitsu
Department Of Biological Sciences Graduate School Of Science Tokyo Metropolitan University
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Wada Masamitsu
Department Of Biology Faculty Of Science Tokyo Metropolitan University
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Wada Masamitsu
Dept. Biol. Tokyo Metropolitan Univ.
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Kadota Akeo
Department of Biology, Faculty of Science, Tokyo Metropolitan University
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Hayami Jun
Department of Biology, Faculty of Science, Tokyo Metropolitan University
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Kadota A
Department Of Biological Sciences Graduate School Of Science Tokyo Metropolitan University
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Hayami Jun
Department Of Biology Faculty Of Science Tokyo Metropolitan University
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Wada M
Apple Research Station National Institute Of Fruit Tree Science National Agriculture And Food Resear
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Kadota Akeo
Department Of Biological Sciences Graduate School Of Science And Engineering Tokyo Metropolitan Univ
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