Activation Tagging of the Floral Inducer FT
Abstract
FLOWERING LOCUS T (FT), which acts in parallel with the meristem-identity geneLEAFY (LFY) to induce flowering of Arabidopsis, was isolated by activation tagging. Like LFY, FT acts partially downstream of CONSTANS (CO), which promotes flowering in response to long days. Unlike many other floral regulators, the deduced sequence of the FT protein does not suggest that it directly controls transcription or transcript processing. Instead, it is similar to the sequence of TERMINAL FLOWER 1 (TFL1), an inhibitor of flowering that also shares sequence similarity with membrane-associated mammalian proteins.
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Special thanks to T. Araki for exchanging information on FT and the gift of ft deletion mutants. We thank C. Graham, S. Haaksma, V. Hedquist, H. Trinh, and D. Wolfe for assistance; M. Koornneef for unpublished information; our colleagues at the Salk Institute and G. Coupland, O. Nilsson, O. Ratcliffe, and M. Yanofsky for discussion; and G. Coupland, I. Igeño, M. Koornneef, S. Liljegren, and the NSF-supported ABRC for material. Supported by the Samuel Roberts Noble Foundation (I.K. and M.J.H.), KOSEF and the Hoffman Foundation (J.H.A.), the Howard Hughes Medical Institute (J.C.), and the NSF (S.K.C. and D.W.).
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Published In
Science
Volume 286 | Issue 5446
3 December 1999
3 December 1999
Submission history
Received: 17 August 1999
Accepted: 7 October 1999
Published in print: 3 December 1999
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- Igor Kardailsky et al.
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