Seasonal shift in timing of vernalization as an adaptation to extreme winter.

ABSTRACT: The requirement for vernalization, a need for prolonged cold to trigger flowering, aligns reproductive development with favorable spring conditions. In Arabidopsis thaliana vernalization depends on the cold-induced epigenetic silencing of the floral repressor locus FLC. Extensive natural variation in vernalization response is associated with A. thaliana accessions collected from different geographical regions. Here, we analyse natural variation for vernalization temperature requirement in accessions, including those from the northern limit of the A. thaliana range. Vernalization required temperatures above 0°C and was still relatively effective at 14°C in all the accessions. The different accessions had characteristic vernalization temperature profiles. One Northern Swedish accession showe

SUBMITTER: Duncan S 

PROVIDER: S-EPMC4532801 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature