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Article Addendum
Integration of seasonal flowering time responses in temperate cereals
Megan N. Hemming, W. James Peacock, Elizabeth S. Dennis and Ben Trevaskis
volume 3 | issue 8
august 2008Pages: 601 - 602
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Our paper describes how the genetic pathways which regulate vernalization and long-day flowering responses are integrated to promote spring flowering in cereals. This process is mediated by the VERNALIZATION1 (VRN1) and VRN2 genes. VRN2 encodes a CONSTANS-like protein that represses FLOWERING LOCUS T (FT1) to block the long-day flowering response until plants are vernalized. When plants are vernalized VRN1, a FRUITFUL-like MADS box transcription factor, is induced. This down-regulates VRN2, allowing long-day induction of FT1 to occur post-vernalization. A comparison of the pathways regulating seasonal induction of flowering in cereals with those of Arabidopsis shows the vernalization response pathway has evolved convergently to regulate the activity of a conserved daylength response pathway in these divergent plant lineages.
Addendum to: Hemming M.N, Peacock W.J, Dennis E.S, Trevaskis B. Low temperature and daylength cues are integrated to regulate FLOWERING LOCUS T in barley. Plant Physiol 2008; 147:355-66.
Authors
Megan N. Hemming
CSIRO Division of Plant Industry, GPO Box Canberra, ACT 2601, Australia
W. James Peacock
CSIRO Division of Plant Industry, GPO Box Canberra, ACT 2601, Australia
Elizabeth S. Dennis
CSIRO Division of Plant Industry, GPO Box Canberra, ACT 2601, Australia
Ben Trevaskis
CSIRO Division of Plant Industry, GPO Box Canberra, ACT 2601, Australia