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Auxin controls rice root angle via kinase OsILA1-mediated cell wall modifications by Xiaoyun Song1†, Suhang Yu1†, Qiaoyi Li1, Yali Xiong1, Dilixiadanmu Tashenmaimaiti1, Malcolm J. Bennett2, Staffan Persson1,3, Xiuzhen Kong1*, Rahul Bhosale2*, Guoqiang Huang1* is a book available to read on EtoBox.

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INTRODUCTIONRoot angle, a crucial characteristic of the root system—an important interface mediating plant-environment interactions, is predominantly shaped by root gravitropism, which occurs in three distinct phases: gravity perception, asymmetric auxin distribution, and differential growth response (1–5). The differential growth is governed by an asymmetric auxin gradient that forms within the root elongation zone, leading to differential cell elongation (6, 7). According to the acid growth theory, low auxin concentrations on the upper side induce cell expansion through cell wall acidification and relaxation (8). In contrast, high auxin accumulation on the lower side of the gravitropic root inhibits cell elongation (9). Further research has shown that auxin orchestrates two opposing signaling cascades, rapidly modulating the apoplastic pH to influence cell wall expansion (10, 11). A transmembrane kinase, TRANSMEMBRANE KINASE1 (TMK1), interacts with plasma membrane H+-ATPase and mediates its phosphorylation to promote extracellular acidification; meanwhile, canonical auxin signaling within the cells drives net cellular H+ influx, resulting in extracellular alkalization (10). T

Author

Xiaoyun Song1†, Suhang Yu1†, Qiaoyi Li1, Yali Xiong1, Dilixiadanmu Tashenmaimaiti1, Malcolm J. Bennett2, Staffan Persson1,3, Xiuzhen Kong1*, Rahul Bhosale2*, Guoqiang Huang1*

Publisher

Creative Media Partners, LLC

Published

2025

Language

EN

ISBN

9781011262328