Author:
Lee Han Yong,Seo Dong Hye,Park Hye Lin,Bakshi Arkadipta,Park Chanung,Kieber Joseph J.,Binder Brad M.,Yoon Gyeong Mee
Abstract
SummaryEthylene gas controls plant growth and stress responses. Ethylene-exposed dark-grown seedlings exhibit dramatic growth reduction, yet the seedlings rapidly return to the basal growth rate when ethylene gas is removed. However, the underlying mechanism governing this reversible acclimation of dark-grown seedlings to ethylene remains enigmatic. Here, we report that ethylene triggers the translocation of the Raf-like protein kinase CONSTITUTIVE TRIPLE RESPONSE1 (CTR1), a negative regulator of ethylene signaling, from the endoplasmic reticulum to the nucleus. Nuclear-localized CTR1 stabilizes the ETHYLENE-INSENSITIVE3 (EIN3) transcription factor via interaction with the EIN3-BINDING F-box (EBF) proteins, thus enhancing the ethylene response and delaying growth recovery. These findings uncover a mechanism of the ethylene signaling pathway that links the spatiotemporal dynamics of cellular signaling components to organismal responses.
Publisher
Cold Spring Harbor Laboratory
Reference41 articles.
1. Abeles, F.B. , Morgan, P.W. & Saltveit, M.E.J. Ethylene in plant biology. San Diego, CA: Academic Press. (1992).
2. Ethylene: A Gaseous Signal Molecule in Plants
3. The ethylene pathway: a paradigm for plant hormone signaling and interaction;Science’s STKE: signal transduction knowledge environment,2001
4. The ethylene response factors SNORKEL1 and SNORKEL2 allow rice to adapt to deep water
5. Editing of the OsACS locus alters phosphate deficiency-induced adaptive responses in rice seedlings;J. Exp. Bot,2019