Expression conservation within the circadian clock of a monocot: natural variation at barley Ppd-H1 affects circadian expression of flowering time genes, but not clock orthologs.

ABSTRACT:

Background

The circadian clock is an endogenous mechanism that coordinates biological processes with daily changes in the environment. In plants, circadian rhythms contribute to both agricultural productivity and evolutionary fitness. In barley, the photoperiod response regulator and flowering-time gene Ppd-H1 is orthologous to the Arabidopsis core-clock gene PRR7. However, relatively little is known about the role of Ppd-H1 and other components of the circadian clock in temperate crop species. In this study, we identified barley clock orthologs and tested the effects of natural genetic variation at Ppd-H1 on diurnal and circadian expression of clock and output genes from the photoperiod-response pathway.

Results

Barley clock orthologs HvCCA1, HvGI, HvPRR1, HvPRR37 (Ppd-H1),

SUBMITTER: Campoli C 

PROVIDER: S-EPMC3478166 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature