NDLI: Ethylene signaling negatively regulates freezing tolerance by repressing expression of CBF and type-A ARR genes in Arabidopsis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Shi, Yiting Tian, Shouwei Hou, Lingyan Huang, Xiaozhen Zhang, Xiaoyan Guo, Hongwei Yang, Shuhua
Description	Country affiliation: China Author Affiliation: Shi Y ( State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.)
Abstract	The phytohormone ethylene regulates multiple aspects of plant growth and development and responses to environmental stress. However, the exact role of ethylene in freezing stress remains unclear. Here, we report that ethylene negatively regulates plant responses to freezing stress in Arabidopsis thaliana. Freezing tolerance was decreased in ethylene overproducer1 and by the application of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid but increased by the addition of the ethylene biosynthesis inhibitor aminoethoxyvinyl glycine or the perception antagonist Ag+. Furthermore, ethylene-insensitive mutants, including etr1-1, ein4-1, ein2-5, ein3-1, and ein3 eil1, displayed enhanced freezing tolerance. By contrast, the constitutive ethylene response mutant ctr1-1 and EIN3-overexpressing plants exhibited reduced freezing tolerance. Genetic and biochemical analyses revealed that EIN3 negatively regulates the expression of CBFs and type-A Arabidopsis response regulator5 (ARR5), ARR7, and ARR15 by binding to specific elements in their promoters. Overexpression of these ARR genes enhanced the freezing tolerance of plants. Thus, our study demonstrates that ethylene negatively regulates cold signaling at least partially through the direct transcriptional control of cold-regulated CBFs and type-A ARR genes by EIN3. Our study also provides evidence that type-A ARRs function as key nodes to integrate ethylene and cytokinin signaling in regulation of plant responses to environmental stress.
File Format	HTM / HTML
ISSN	10404651
e-ISSN	1531298X
DOI	10.1105/tpc.112.098640
Journal	THE PLANT CELL ONLINE
Issue Number	6
Volume Number	24
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2012-06-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Botany Arabidopsis Proteins Genetics Metabolism Arabidopsis Ethylenes Gene Expression Regulation, Plant Amino Acids, Cyclic Pharmacology Drug Effects Cytokinins Dna-binding Proteins Freezing Glycine Analogs & Derivatives Mutation Nuclear Proteins Receptors, Cell Surface Signal Transduction Stress, Physiological Trans-activators Transcription Factors Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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