Affiliation:
1. College of Life Sciences, College of Horticulture, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University , Fuzhou, 350002, China
2. College of Horticulture, Hunan Agricultural University , Changsha, China
Abstract
Abstract
Vascular tissues are surrounded by an apoplastic barrier formed by endodermis that is vital for selective absorption of water and nutrients. Lignification and suberization of endodermal cell walls are fundamental processes in establishing the apoplastic barrier. Endodermal suberization in Arabidopsis (Arabidopsis thaliana) roots is presumed to be the integration of developmental regulation and stress responses. In root endodermis, the suberization level is enhanced when the Casparian strip, the lignified structure, is defective. However, it is not entirely clear how lignification and suberization interplay and how they interact with stress signaling. Here, in Arabidopsis, we constructed a hierarchical network mediated by SHORT-ROOT (SHR), a master regulator of endodermal development, and identified 13 key MYB transcription factors (TFs) that form multiple sub-networks. Combined with functional analyses, we further uncovered MYB TFs that mediate feedback or feed-forward loops, thus balancing lignification and suberization in Arabidopsis roots. In addition, sub-networks comprising nine MYB TFs were identified that interact with abscisic acid signaling to integrate stress response and root development. Our data provide insights into the mechanisms that enhance plant adaptation to changing environments.
Funder
The National Key Research and Development Program of China
National Key Programs for bok choy Breeding of China
Scientific Research Foundation of Graduate School of Fujian Agriculture and Forestry University
Publisher
Oxford University Press (OUP)
Subject
Plant Science,Genetics,Physiology
Cited by
25 articles.
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