Journal
JOURNAL OF EXPERIMENTAL BOTANY
Volume 64, Issue 18, Pages 5795-5799Publisher
OXFORD UNIV PRESS
DOI: 10.1093/jxb/err114
Keywords
Cytokinin; florigen; FLOWERING LOCUS T (FT); mitotic activation; organizing centre; shoot apical meristem (SAM); Sinapis alba (Sa); SUPPRESSOR OF OVEREXPRESSION OF CO1 (SOC1); WUSCHEL (WUS)
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My favourite flowering image shows a section in a shoot apical meristem of Sinapis alba undertaking the very first step of its transition to flowering. This step is the activation of the SaSOC1 gene, the Sinapis orthologue of Arabidopsis SUPPRESSOR OF OVEREXPRESSION OF CO1 (SOC1), in a few central cells of the meristem. Hidden behind this picture is my long quest of physiological signals controlling flowering. Milestones of this story are briefly recounted here and this gives me an opportunity to raise a number of questions about the nature and function of florigen.
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