FRIGIDA-related genes are required for the winter-annual habit in Arabidopsis
| Autor: | Scott D. Michaels, Richard M. Amasino, Isabel C. Bezerra |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Genetics
Multidisciplinary Base Sequence Arabidopsis Proteins Mutant fungi Molecular Sequence Data Arabidopsis food and beverages Locus (genetics) Biology Biological Sciences Environment biology.organism_classification Null allele RNA Plant Flowering Locus C Botany Gene family Biennial plant Amino Acid Sequence Seasons Gene Phylogeny |
| Popis: | 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 flowering habits. In winter-annual accessions of Arabidopsis, FRI activity blocks flowering through the up-regulation of the floral inhibitor 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, FRI and FRL1 do not have redundant functions. FRI and FRL1 belong to a seven-member gene family in Arabidopsis , and FRI, FRL1 , and at least one additional family member, FRIGIDA LIKE 2 ( FRL2 ), are in a clade of this family that is required for the winter-annual habit in Arabidopsis . |
| Databáze: | OpenAIRE |
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