The multifaceted roles of HY5, ELONGATED HYPOCOTYL5, in plant growth and development

GANGAPPA SN; BOTTO JF

MOLECULAR PLANT

OXFORD UNIV PRESS

Lugar: Oxford; Año: 2016 vol. 9 p. 1353 - 1365

1674-2052

ELONGATED HYPOCOTYL5 (HY5), a member of bZIP transcriptionfactor family, inhibits hypocotyl growth and lateral root development, and promotespigment accumulation in a light dependant manner in Arabidopsis. The recentresearch on its role in different processes such as, hormone, nutrient, abioticstress (ABA, salt, cold), and ROS signaling pathways clearly places HY5 at thecentre of a transcriptional network hub. HY5 regulates the transcription oflarge number of genes by directly binding to cis-regulatory elements. Recently,HY5 has been shown to activate its expression both under visible and UV-B light.Moreover, HY5 acts as a signal that moves from shoot to root to promote nitrateuptake and root growth. Here, we briefly review recent advances on HY5 researchin diverse aspects of plant development, and also point out still openquestions that needs to be addressed in the near future to have a completeunderstanding of its function in plant signaling and beyond.