dependent on day length. In addition, when both Hd3a
and RFT1 activities are suppressed, flowering is completely abolished, suggesting that flowering is fully dependent on florigen activity in rice
].
RFT1RNAi suppression showed a contrasting phenotype
fromHd3aRNAi.RFT1RNAi suppression had no effect
on flowering in SD conditions but impaired flowering
specifically during LD. Consistent with this observation,
RFT1expression increased during LD in leaf phloem
tissue, and RFT1 protein was shown to move from leaves
to the shoot apex by using a RFT1-GFP fusion protein.
All these observations strongly indicate that RFT1 is the
LD-specific florigen, and rice uses two florigen genes
dependent on day length. In addition, when both Hd3aand RFT1 activities are suppressed, flowering is completely abolished, suggesting that flowering is fully dependent on florigen activity in rice].RFT1RNAi suppression showed a contrasting phenotypefromHd3aRNAi.RFT1RNAi suppression had no effecton flowering in SD conditions but impaired floweringspecifically during LD. Consistent with this observation,RFT1expression increased during LD in leaf phloemtissue, and RFT1 protein was shown to move from leavesto the shoot apex by using a RFT1-GFP fusion protein.All these observations strongly indicate that RFT1 is theLD-specific florigen, and rice uses two florigen genes
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