Daily changes in temperature, not the circadian clock, regulate growth rate in Brachypodium distachyon.

ABSTRACT: Plant growth is commonly regulated by external cues such as light, temperature, water availability, and internal cues generated by the circadian clock. Changes in the rate of growth within the course of a day have been observed in the leaves, stems, and roots of numerous species. However, the relative impact of the circadian clock on the growth of grasses has not been thoroughly characterized. We examined the influence of diurnal temperature and light changes, and that of the circadian clock on leaf length growth patterns in Brachypodium distachyon using high-resolution time-lapse imaging. Pronounced changes in growth rate were observed under combined photocyles and thermocycles or with thermocycles alone. A considerably more rapid growth rate was observed at 28°C than 12°C, irrespective o

SUBMITTER: Matos DA 

PROVIDER: S-EPMC4057399 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature