Ethylene modulates cell wall mechanics for root responses to compaction
Abstract
Abstract Soil stresses affect crop yields and present global agricultural challenges 1 . Soil compaction triggers reduction in root length and radial expansion driven by the plant hormone ethylene 2 . Here we report how ethylene controls cell wall biosynthesis to promote root radial expansion. We demonstrate how soil compaction stress, via ethylene, upregulates Auxin Response Factor1 in the root cortex, which represses cellulose synthase (CESA) genes. CESA repression drives radial expansion of root cortical cells by modifying the thickness of their cell walls, which results in a thicker epidermis and thinner cortex. Our research links ethylene signalling with root cell wall remodelling, and reveals how dynamic regulation of cellulose synthesis controls root growth in compacted soil.
Article Details
Authors (23)
Jiao Zhang
Zengyu Liu
Edward J. Farrar
Minhao Li
Hui Lu
Zhuo Qu
Osvaldo Chara
Nobutaka Mitsuda
Shingo Sakamoto
Feiyang Xue
Qiji Shan
Ya Yu
Jingbin Li
Xiaobo Zhu
Mingyuan Zhu
Jin Shi
Lucas Peralta Ogorek
Augusto Borges
Malcolm J. Bennett
Wanqi Liang
Bipin K. Pandey
Dabing Zhang
Staffan Persson