| Autor: |
Weller, James L., Batge, Shona L., Smith, Jennifer J., Kerckhoffs, L. Huub J., Sineshchekov, Vitaly A., Murfet, Ian C., Reid, James B. |
| Předmět: |
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| Zdroj: |
Plant Physiology; Aug2004, Vol. 134 Issue 4, p2186-2195, 10p, 8 Graphs |
| Abstrakt: |
Phytochrome A (phyA) is an important photoreceptor controlling many processes throughout the plant life cycle. It is unique within the phytochrome family for its ability to mediate photomorphogenic responses to continuous far-red light and for the strong photocontrol of its transcript level and protein stability. Here we describe a dominant mutant of garden pea (Pisum sativum) that displays dramatically enhanced responses to light, early photoperiod-independent flowering, and impaired photodestruction of phyA. The mutant carries a single base substitution in the PHYA gene that is genetically inseparable from the mutant phenotype. This substitution is predicted to direct the replacement of a conserved Ala in an N-terminal region of PHYA that is highly divergent between phyA and other phytochromes. This result identifies a region of the phyA photoreceptor molecule that may play an important role in its fate after photoconversion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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