We determined the role of phyA and phyB in mediating negative photoregulation of the PHYA gene in Arabidopsis using phyA and phyB null mutants and have quantitatively defined the kinetics and fluence-rate dependence of FRc-light-imposed repression of this gene.

Jul 25, 2017 · In this study, we firstly reported that the mutation of two phytochrome genes, PHYA and PHYB, could lead to partial male sterile, which was similar to that of the triple mutant.

Phytochromes are the main plant photoreceptors regulating multiple developmental processes. However, the regulatory network of phytochrome-mediated plant reproduction has remained largely unexplored. There are three phytochromes in rice, phyA, phyB ...

Sep 18, 2024 · Data showed a transcriptionally suppressed epi-allele of phytochrome A gene (PHYA) methylated only in symmetric CG sites resident in exonic regions, resulting in elongated hypocotyls in seedlings grown under continuous far-red light.

The negatively photoregulated PHYA gene has a complex promoter structure in Arabidopsis, with three active transcription start sites. To identify the photoreceptors responsible for regulation of this gene, and to assess the relative roles of the three transcription start sites, we …

These results identify TZP as a positive regulator of phytochrome A (phyA) signaling required for phosphorylation of the phyA photoreceptor, thus suggesting an important role of phosphorylated phyA in inducing the FR light response.

The phytochrome genes PHYA and PHYB showed distinct patterns of tissue- and developmental stage-specific expression in rice. The PHYA promoter-GUS was expressed in all leaf tissues in etiolated seedlings, while its expression was restricted to vascular bundles in expanded leaves of light-grown seedlings.

Sep 8, 2013 · So far, the members of the PHY gene family in soybean (Glycine max) remain unclear and an understanding of each member’s physiological functions is limited. Our present in silico analysis revealed that the soybean genome harbors four PHYA, two PHYB and two PHYE, totally four pairs of eight PHY loci.

So far, the members of the PHY gene family in soybean (Glycine max) remain unclear and an understanding of each member's physiological functions is limited. Our present in silico analysis revealed that the soybean genome harbors four PHYA, two PHYB and two PHYE, totally four pairs of eight PHY loci.

Phytochrome A (phyA) provides light input signals to entrain the circadian clock. The clock is known to rhythmically regulate its light input pathway, so we tested rhythmic regulation of phyA, using transgenic plants carrying a PHYA promoter fusion to the luciferase reporter (PHYA:LUC).