Integration of light and photoperiodic signaling in transcriptional nuclear foci

Kaiserli, E. , Páldi, K., O’Donnell, L., Batalov, O., Pedmale, U. V., Nusinow, D. A., Kay, S. A. and Chory, J. (2015) Integration of light and photoperiodic signaling in transcriptional nuclear foci. Developmental Cell, 35(3), pp. 311-321. (doi: 10.1016/j.devcel.2015.10.008)

Abstract

Light regulates major plant developmental transitions by orchestrating a series of nuclear events. This study uncovers the molecular function of the natural variant, TZP (Tandem Zinc-finger-Plus3), as a signal integrator of light and photoperiodic pathways in transcriptional nuclear foci. We report that TZP acts as a positive regulator of photoperiodic flowering via physical interactions with the red-light receptor phytochrome B (phyB). We demonstrate that TZP localizes in dynamic nuclear domains regulated by light quality and photoperiod. This study shows that phyB is indispensable not only for localizing TZP to transcriptionally active nuclear photobodies, but also for recruiting TZP on the promoter of the floral inducer FLOWERING LOCUS T (FT). Our findings signify a unique transcriptional regulatory role to the highly enigmatic plant nuclear photobodies, where TZP directly activates FT gene expression and promotes flowering.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Kaiserli, Dr Eirini
• Authors: Kaiserli, E., Páldi, K., O’Donnell, L., Batalov, O., Pedmale, U. V., Nusinow, D. A., Kay, S. A., and Chory, J.
• College/School: College of Medical Veterinary and Life Sciences > School of Molecular Biosciences
• Journal Name: Developmental Cell
• Publisher: Elsevier
• ISSN: 1534-5807
• ISSN (Online): 1878-1551
• Copyright Holders: Copyright © 2015 Elsevier
• First Published: First published in Developmental Cell 35(3):311-321
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher.