Auxin controls circadian flower opening and closure in the waterlily.

ABSTRACT:

Background

Flowers open at sunrise and close at sunset, establishing a circadian floral movement rhythm to facilitate pollination as part of reproduction. By the coordination of endogenous factors and environmental stimuli, such as circadian clock, photoperiod, light and temperature, an appropriate floral movement rhythm has been established; however, the underlying mechanisms remain unclear.

Results

In our study, we use waterlily as a model which represents an early-diverging grade of flowering plants, and we aim to reveal the general mechanism of flower actions. We found that the intermediate segment of petal cells of waterlily are highly flexible, followed by a circadian cell expansion upon photoperiod stimuli. Auxin causes constitutively flower opening while auxin inhibi

SUBMITTER: Ke M 

PROVIDER: S-EPMC6042438 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature