TY - JOUR AU - AB - Downloaded from genesdev.cshlp.org on November 4, 2021 - Published by Cold Spring Harbor Laboratory Press The Arabidopsis HY5 gene encodes a bZIP protein that regulates stimulus-induced development of root and hypocotyl 1 2 1,3 Tokitaka Oyama, Yoshiro Shimura, and Kiyotaka Okada 1 2 Department of Botany, Graduate School of Science, Kyoto University, Kyoto 606-01, Japan; Biomolecular Engineering Research Institute, Furuedai, Suita, Osaka 565, Japan Plant developmental processes are controlled by both endogenous programs and environmental stimuli. As a photomorphogenetic mutant, hy5 of Arabidopsis has been isolated and characterized. Our detailed characterization has revealed that the mutant is deficient in a variety of stimulus responses, including gravitropic response and waving growth of roots, as well as light-dependent hypocotyl elongation. In the roots and hypocotyl, the hy5 mutation also affects greening and specific cell proliferation such as lateral root formation and secondary thickening. Those phenotypes indicate that the HY5 gene is responsible for the regulation of fundamental developmental processes of the plant cell: cell elongation, cell proliferation, and chloroplast development. Molecular cloning of the HY5 gene using a T-DNA-tagged mutant has revealed that the gene encodes a protein with a bZIP motif, one of the motifs found in transcriptional regulators. Nuclear TI - The Arabidopsis HY5 gene encodes a bZIP protein that regulates stimulus-induced development of root and hypocotyl JF - Genes & Development DO - 10.1101/gad.11.22.2983 DA - 1997-11-15 UR - https://www.deepdyve.com/lp/unpaywall/the-arabidopsis-hy5-gene-encodes-a-bzip-protein-that-regulates-1Y0B0JWFQK DP - DeepDyve ER -