Samach A, Onouchi H, Gold S E, Ditta G S, Schwarz-Sommer Z, Yanofsky M F, Coupland G
John Innes Centre, Norwich NR4 7UH, UK.
Science. 2000 Jun 2;288(5471):1613-6. doi: 10.1126/science.288.5471.1613.
In plants, flowering is triggered by endogenous and environmental signals. CONSTANS (CO) promotes flowering of Arabidopsis in response to day length. Four early target genes of CO were identified using a steroid-inducible version of the protein. Two of these genes, SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOC1) and FLOWERING LOCUS T (FT), are required for CO to promote flowering; the others are involved in proline or ethylene biosynthesis. The SOC1 and FT genes are also regulated by a second flowering-time pathway that acts independently of CO. Thus, early target genes of CO define common components of distinct flowering-time pathways.
在植物中，开花是由内源性和环境信号触发的。CONSTANS（CO）响应日照长度促进拟南芥开花。使用该蛋白的类固醇诱导型版本鉴定出了CO的四个早期靶基因。其中两个基因，CO过表达抑制因子1（SOC1）和开花位点T（FT），是CO促进开花所必需的；其他基因则参与脯氨酸或乙烯的生物合成。SOC1和FT基因也受第二条独立于CO起作用的开花时间途径调控。因此，CO的早期靶基因定义了不同开花时间途径的共同组成部分。
