Cytoplasmic Phytochrome Action
نویسندگان
چکیده
منابع مشابه
Arabidopsis fhl/fhy1 double mutant reveals a distinct cytoplasmic action of phytochrome A.
Phytochrome A (phyA) plays an important role during germination and early seedling development. Because phyA is the primary photoreceptor for the high-irradiance response and the very-low-fluence response, it can trigger development not only in red and far-red (FR) light but also in a wider range of light qualities. Although phyA action is generally associated with translocation to the nucleus ...
متن کاملAction of Phytochrome During Prechilling of Amaranthus retroflexus L. Seeds.
Dark germination of Amaranthus retroflexus L. seeds at 35 degrees increased after several days of prechilling at 20 degrees or lower. Irradiation with far-red light for short periods during the early hours of a prechilling period at 10 degrees inhibited subsequent dark germination at 35 degrees . The inhibition was completely reversible with red light. Far-red irradiation in the latter part of ...
متن کاملDependence of phytochrome action in seeds on membrane organization.
Germination of Amaranthus retroflexus L. seeds imbibed at 40 C is enhanced by establishing the active form of phytochrome before a reduction in temperature to <32 C. The half-time for effectiveness of the lower temperature is about 8 min at 15 C. Isolated membrane fragments of A. retroflexus seeds associated with the fluorescent probe 1,8-anilino-naphthalene sulfonate (ANS) increase in structur...
متن کاملOn the involvement of acetylcholine in phytochrome action.
In a recent publication Jaffe (1) presented data which implicated acetylcholine as the causative agent in the phytochrome-mediated attachment of mung bean root tips on a glass surface. Since ACh2 is responsible for the bioelectric potential changes in certain nerve cells of animals, proof of its participation in any phytochrome-mediated process is of great significance in elucidating the mechan...
متن کاملMolecular mechanisms for mediating light-dependent nucleo/cytoplasmic partitioning of phytochrome photoreceptors
The photoreceptors phytochromes monitor the red/far-red part of the spectrum, exist in the biologically active Pfr (far-red absorbing) or inactive Pr (red absorbing) forms, and function as red/far-red light-regulated molecular switches to modulate plant development and growth. Phytochromes are synthesized in the cytoplasm, and light induces translocation of the Pfr conformer into the nucleus. N...
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ژورنال
عنوان ژورنال: Plant and Cell Physiology
سال: 2010
ISSN: 0032-0781,1471-9053
DOI: 10.1093/pcp/pcq091