Work

TREE1-EIN3–mediated transcriptional repression inhibits shoot growth in response to ethylene

Year: 2020

Type: article

Abstract: Ethylene is an important plant hormone that regulates plant growth, in which the master transcriptionactivator EIN3 (Ethylene Insensitive 3)-mediated transcriptional activation plays vital roles. However, the EIN3-mediated transcriptional repression in ethylene response is unknown. We report here that a Transcriptional Repressor of EIN3-dependent Ethylene-response 1 (TREE1) interacts with EIN3 to regulate transcriptional repression that leads to an inhibition of shoot growth in response to ethylene. Tissue-specific transcriptome analysis showed that most of the genes are down-regulated by ethylene in shoots, and a DNA binding motif was identified that is important for this transcriptional repression. TREE1 binds to the DNA motif to repress gene expression in an EIN3-dependent manner. Genetic validation demonstrated that repression of TREE1-targeted genes leads to an inhibition of shoot growth. Overall, this work establishes a mechanism by which transcriptional repressor TREE1 interacts with EIN3 to inhibit shoot growth via transcriptional repression in response to ethylene.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.2018735117

Authors: Likai Wang, Eun Esther Ko, Jaclyn Tran, Hong Qiao

Institution: The University of Texas at Austin

Language: English

Topic: Plant Molecular Biology Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: hybrid

Funder: National Institute of General Medical Sciences

Award: Investigate the molecular mechanisms of the interplay between cell metabolism and histone modification in ethylene signaling in Arabadopsis