Photoreceptor regulation of CONSTANS protein in photoperiodic flowering

被引：1024
作者：
Valverde, F
Mouradov, A
Soppe, W
Ravenscroft, D
Samach, A
Coupland, G
机构：
[1] Max Planck Inst Plant Breeding, D-50829 Cologne, Germany
[2] Hebrew Univ Jerusalem, Robert H Smith Inst Plant Sci & Genet Agr, IL-76100 Rehovot, Israel
来源：
SCIENCE | 2004年 / 303卷 / 5660期
关键词：
D O I：
10.1126/science.1091761
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Many plants flower in response to seasonal fluctuations in day length. The CONSTANS (CO) gene of Arabidopsis promotes flowering in long days. Flowering is induced when CO messenger RNA expression coincides with the exposure of plants to light. However, how this promotes CO activity is unknown. We show that light stabilizes nuclear CO protein in the evening, whereas in the morning or in darkness the protein is degraded by the proteasome. Photoreceptors regulate CO stability and act antagonistically to generate daily rhythms in CO abundance. This layer of regulation refines the circadian rhythm in CO messenger RNA and is central to the mechanism by which day length controls flowering.
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页码：1003 / 1006
页数：4
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