Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Mar 10;11:271. doi: 10.3389/fpls.2020.00271

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2020 Xu, Zhao, Cai, Mao, Miao and Xiang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

Integration of Ethylene into Auxin Signaling in Arabidopsis Root Development. Environmental cues trigger the biosynthesis of ethylene in Arabidopsis, and then ethylene binds to ETR receptors to inactivate CTR1, which functions to repress EIN2. When EIN2 is released by CTR1, it can be cleaved and then helps to stabilize EIN3/EIL1, leading to the activation of downstream transcriptional cascades. Ethylene inhibits primary root growth by regulating auxin biosynthesis, transport, and signaling. ERF1 and HB52 function as crosstalk nodes between ethylene and auxin in this process. An increase in endogenous ethylene enhances auxin transport and reduces lateral root formation depending on AUX1, PIN3, and PIN7. The ERF1 and HB52 regulatory modules are part of the molecular mechanisms in the adaptive response of root growth to environmental cues.