Dissecting the phytochrome A-dependent signaling network in higher plants.
Plants monitor their ambient light environment using a network of photoreceptors. In Arabidopsis, phytochrome A (phyA) is the primary photoreceptor responsible for perceiving and mediating various responses to far-red light. Several breakthroughs in understanding the signaling network mediating phyA-activated responses have been made in recent years. Here, we highlight several key advances: the demonstration that light regulates nuclear translocation of phyA and its associated kinase activity; the revelation of a transcriptional cascade controlling phyA-regulated gene expression; the detection of a direct interaction between phyA and a transcription factor; and the identification and characterization of many phyA-specific signaling intermediates, some of them suggesting the involvement of the ubiquitin-proteasome pathway.
Wang
Haiyang
H
Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, NY 14853, USA.
Deng
Xing Wang
XW
D021581:Active Transport, Cell Nucleus; D029681:Arabidopsis Proteins; D018506:Gene Expression Regulation, Plant; D008027:Light; D010834:Phytochrome / Q000378:metabolism*; D051942:Phytochrome A; D059828:Plant Cells; D010944:Plants / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction
D029681:Arabidopsis Proteins; C497973:PHYA protein, Arabidopsis; D051942:Phytochrome A; D010834:Phytochrome