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Though their research that discovered PRR genes was primarily hailed during the early 2000s as informing the scientific community about the function of TOC1 (named APRR1 by the Mizuno lab), an additional pseudo-response regulator in the Arabidopsis thaliana biological clock, [3] the information about PRR genes that Matsushika and his team found ...
Arabidopsis thaliana is an annual (rarely biennial) plant, usually growing to 20–25 cm tall. [6] The leaves form a rosette at the base of the plant, with a few leaves also on the flowering stem. The basal leaves are green to slightly purplish in color, 1.5–5 cm long, and 2–10 mm broad, with an entire to coarsely serrated margin; the stem ...
CCA1 was first identified in Arabidopsis thaliana by Elaine M. Tobin’s lab in UCLA in 1993. [2] Tobin’s lab was studying promoter fragments that contribute to light regulation of light-harvesting Chlorophyll A/B Binding Protein (LHCB), and noticed DNA-binding activity that had affinity for a specific light-responsive fragment of the LHCB promoter.
Tobin first used Lemna gibba (duckweed) and later Arabidopsis thaliana (cress) as model plant systems to study light regulation of gene expression in plants, examining interactions between phytochrome photoreceptors, genes, and circadian rhythms. [13]
In biological research, repressilators have been used to build cellular models and understand cell function. There are both artificial and naturally-occurring repressilators. Recently, the naturally-occurring repressilator clock gene circuit in Arabidopsis thaliana (A. thaliana) and mammalian systems have been studied.
Plants with non-functioning LHY and CCA1 show a wavy leaf phenotype in constant light conditions. Mutants also have increased vascular pattern complexity in their leaves, with more areoles, branch points and free ends than wild-type Arabidopsis. [5] The function of LHY was initially demonstrated by a group in the Steve Kay lab, including Andrew ...
A double loss-of-function mutation in Arabidopsis thaliana Early Flowering 3 (elf3) and Cry2 genes delays flowering under continuous light and was shown to accelerate it during long and short days, which suggests that Arabidopsis CRY2 may play a role in accelerating flowering time during continuous light. [17]
In 1991, Kay extended this research into a suitable model plant, Arabidopsis thaliana and found that Cab mRNA levels are also under circadian control in Arabidopsis. [7] He then developed Cab2:luc fusion, the fusion of luciferase open reading frame downstream of the Cab2 promoter region, as a marker for monitoring the circadian phenotype.