Effects of environmental cues and hormones on flowering

Effects of environmental cues and hormones on flowering time control TEMP LIGHT HORM VRN HORM REP Annu. Rev. Genet. 2003 4

Effects of environmental cues on flowering time control Flowering time control by different photoperiods Garner and Allard, 1920 Long-Day Short-Day Adapted from Alex Webb lab, Department of Plant Sciences, University of Cambridge Adapted from : http: //tianwei. pixnet. net/blog/post/10853484 5

Effects of environmental cues on flowering time control Flowering time control by temperature fluctuation 不 經 一 番 寒 澈 骨 焉 得 梅 花 撲 鼻 香 Photo: Fu SF Adapted from Alex Webb lab, Department of Plant Sciences, University of Cambridge 6

Effects of low temperature on flowering in Brassica plants Vernalization -V +V Brassicaceae +V -V Arabidopsis Cabbage +V -V The Plant Cell 2004 7

Effects of multiple environmental cues on flowering Photoperiod and vernalization Arabidopsis Wild-type Early-flowering strain Wild-type Winter-annual strain Plant, Cell and Environment 2000 8

Leaf-produced floral signals-Flowering Locus T (FT) FT protein but not FT m. RNA is phloem mobile 2009 Current Opinion in Plant Biology 9

Flowering locus C (FLC) is a negative regulator of flowering time control and mediated by vernalization 10

Flowering time control in Arabidopsis (Col) FLC-negative regulator ; FT-positive regulator Control + _ 35 S: : At. FLC Data: SF Fu 11

Arabidopsis development—Adult and juvenile 12

Leaf trichomes—Adult and juvenile Juvenile Adult 13

Leaf numbers at bolting-Example 14

Leaf numbers at bolting-Example 15