Critical Gates in Day-Length Recognition to Control the Photoperiodic Flowering

Osugi, Asami; Izawa, Takeshi

doi:10.1016/b978-0-12-417162-6.00004-3

Cited by 3 publications

(2 citation statements)

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“…The day-length dependent (photoperiodic) flowering pathway has been well studied in Arabidopsis thaliana (Golembeski et al, 2014;Osugi & Izawa, 2014;Shrestha et al, 2014). Components of this pathway are implicated in ambient-temperaturedependent flowering (Song et al, 2013), indicating that light and temperature signals can be integrated into the same pathway.…”

Section: Introductionmentioning

confidence: 99%

Cool night‐time temperatures induce the expression ofCONSTANSandFLOWERING LOCUS Tto regulate flowering in Arabidopsis

et al. 2016

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Summary Day length and ambient temperature are major stimuli controlling flowering time. To understand flowering mechanisms in more natural conditions, we explored the effect of daily light and temperature changes on Arabidopsis thaliana.Seedlings were exposed to different day/night temperature and day-length treatments to assess expression changes in flowering genes.Cooler temperature treatments increased CONSTANS (CO) transcript levels at night. Nighttime CO induction was diminished in flowering bhlh (fbh)-quadruple mutants. FLOWERING LOCUS T (FT) transcript levels were reduced at dusk, but increased at the end of cooler nights. The dusk suppression, which was alleviated in short vegetative phase (svp) mutants, occurred particularly in younger seedlings, while the increase during the night continued over 2 wk. Cooler temperature treatments altered the levels of FLOWERING LOCUS M-β (FLM-β) and FLM-δ splice variants. FT levels correlated strongly with flowering time across treatments.Day/night temperature changes modulate photoperiodic flowering by changing FT accumulation patterns. Cooler nighttime temperatures enhance FBH-dependent induction of CO and consequently increase CO protein. When plants are young, cooler temperatures suppress FT at dusk through SVP function, perhaps to suppress precocious flowering. Our results suggest day length and diurnal temperature changes combine to modulate FT and flowering time.

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Section: Introductionmentioning

confidence: 99%

Cool night‐time temperatures induce the expression ofCONSTANSandFLOWERING LOCUS Tto regulate flowering in Arabidopsis

et al. 2016

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“…Xue et al (2008) reported that a quantitative trait locus called Ghd7, identified in an elite rice hybrid, strongly affects heading date: increased expression of Ghd7 under long-day conditions delays heading. Hori et al (2013) reported that the rice flowering-time quantitative trait locus Heading date 16 (Hd16) acts as an inhibitor in the flowering pathway by enhancing the photoperiod response through phosphorylation of Ghd7, and the mechanisms that recognize day length in several plant species were proposed by Osugi and Izawa (2014). In our study, it was thought that Hd16 that it will be necessary to account for the effects of a cultivar's maturity group when planning cultivation schedules for direct seeding.…”

Section: Discussionmentioning

confidence: 99%