ORE1 balances leaf senescence against maintenance by antagonizing G2-like-mediated transcription

M. Rauf, M. Arif, H. Dortay, L.P. Matallana-Ramírez, Mark Waters, H. Gil Nam, P. Lim, B. Mueller-Roeber, S. Balazadeh

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Leaf senescence is a key physiological process in all plants. Its onset is tightly controlled by transcription factors, of which NAC factor ORE1 (ANAC092) is crucial in Arabidopsis thaliana. Enhanced expression of ORE1 triggers early senescence by controlling a downstream gene network that includes various senescence-associated genes. Here, we report that unexpectedly ORE1 interacts with the G2-like transcription factors GLK1 and GLK2, which are important for chloroplast development and maintenance, and thereby for leaf maintenance. ORE1 antagonizes GLK transcriptional activity, shifting the balance from chloroplast maintenance towards deterioration. Our finding identifies a new mechanism important for the control of senescence by ORE1. © 2013 European Molecular Biology Organization.
Original languageEnglish
Pages (from-to)382-388
JournalEMBO Reports
Volume14
Issue number4
DOIs
Publication statusPublished - 2013

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