Research Article

Distinct Roles of CONSTANS Target Genes in Reproductive Development of Arabidopsis

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Science  02 Jun 2000:
Vol. 288, Issue 5471, pp. 1613-1616
DOI: 10.1126/science.288.5471.1613

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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) andFLOWERING 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.

  • * These authors contributed equally to this article.

  • Present address: Faculty of Agriculture, Hebrew University of Jerusalem, Rehovot, Israel.

  • Present address: Department of Plant Pathology, University of Georgia, Athens, GA 30602–7274.

  • § To whom correspondence should be addressed. E-mail: george.coupland{at}

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