Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

FRIGIDA-related genes are required for the winter-annual habit in Arabidopsis

Summary: FRIGIDA-related genes are required for the
winter-annual habit in Arabidopsis
Scott D. Michaels*, Isabel C. Bezerra
, and Richard M. Amasino
Department of Biochemistry, University of Wisconsin, Madison, WI 53706
Edited by Maarten Koornneef, Wageningen University and Research Centre, Wageningen, The Netherlands, and approved December 18, 2003
(received for review October 20, 2003)
In temperate climates, the prolonged cold temperature of winter
serves as a seasonal landmark for winter-annual and biennial
plants. In these plants, flowering is blocked before winter. In
Arabidopsis thaliana, natural variation in the FRIGIDA (FRI) gene is
a major determinate of the rapid-cycling vs. winter-annual flow-
ering habits. In winter-annual accessions of Arabidopsis, FRI activ-
ity blocks flowering through the up-regulation of the floral inhib-
itor FLOWERING LOCUS C (FLC). Most rapid-flowering accessions, in
contrast, contain null alleles of FRI. By performing a mutant screen
in a winter-annual strain, we have identified a locus, FRIGIDA LIKE
1 (FRL1), that is specifically required for the up-regulation of FLC by
FRI. Cloning of FRL1 revealed a gene with a predicted protein
sequence that is 23% identical to FRI. Despite sequence similarity,


Source: Amasino, Richard M. - Department of Biochemistry, University of Wisconsin at Madison


Collections: Biology and Medicine