Blue-light-induced chloroplast orientation in Mougeotia. Evidence for a separate sensor pigment besides phytochrome |
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| Authors: | Halina Gabryś Tadeusz Walczak Wolfgang Haupt |
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| Institution: | (1) Institute of Molecular Biology, Jagellonian University, Al. Mickiewicza 3, PL-31-120 Kraków, Poland;(2) Institute of Nuclear Physics, Radzikowskiego 152, PL-31-142 Kraków, Poland;(3) Institut für Botanik und Pharmazeutische Biologie der Universität Erlangen-Nürnberg, Schlossgarten 4, D-8520 Erlangen, Federal Republic of Germany |
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| Abstract: | Chloroplast orientation in the green alga Mougeotia has been induced by unidirectional red or blue light, given continuously during one hour. In addition, part of the preparations obtained scattered strong far-red light simultaneously with the orienting light. This far-red light completely abolished the response to red light, consistent with phytochrome as the sensor pigment for orientation in Mougeotia. In blue light, however, the response was completely insensitive to far-red light, thus pointing to a different sensor pigment in the shortwavelength region.Abbreviation Pfr
far-red-absorbing form of phytochrome |
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| Keywords: | Blue light (chloroplast orientation) Chlorophyta (chloroplast orientation) Chloroplast orientation Mougeotia (phytochrome) Phytochrome (chloroplast orientation) |
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