上海交通大学Staffan Persson研究组报道了乙烯调节根对压实反应的细胞壁力学。相关论文发表在2025年11月26日出版的《自然》杂志上。

在这里，研究人员报告乙烯如何控制细胞壁的生物合成以促进根的径向扩张。研究组展示了土壤压实胁迫如何通过乙烯上调根皮质中的生长素反应因子，从而抑制纤维素合成酶（CESA）基因。CESA抑制通过改变根皮质细胞的细胞壁厚度来驱动根皮质细胞的径向扩张，从而导致更厚的表皮和更薄的皮层。他们的研究将乙烯信号与根细胞壁重塑联系起来，并揭示了纤维素合成的动态调节如何控制压实土壤中的根生长。土壤压实使根周围的乙烯被困住，导致生长素反应因子的转录上调，导致根皮质细胞壁厚度减少，从而促进根径向扩张。

据介绍，土壤胁迫影响作物产量，对全球农业构成挑战。土壤压实导致根长减少，并由植物激素乙烯驱动径向扩张。

附：英文原文

Title: Ethylene modulates cell wall mechanics for root responses to compaction

Author: Zhang, Jiao, Liu, Zengyu, Farrar, Edward J., Li, Minhao, Lu, Hui, Qu, Zhuo, Chara, Osvaldo, Mitsuda, Nobutaka, Sakamoto, Shingo, Xue, Feiyang, Shan, Qiji, Yu, Ya, Li, Jingbin, Zhu, Xiaobo, Zhu, Mingyuan, Shi, Jin, Ogorek, Lucas Peralta, Borges, Augusto, Bennett, Malcolm J., Liang, Wanqi, Pandey, Bipin K., Zhang, Dabing, Persson, Staffan

Issue&Volume: 2025-11-26

Abstract: Soil stresses affect crop yields and present global agricultural challenges1. Soil compaction triggers reduction in root length and radial expansion driven by the plant hormone ethylene2. 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. Soil compaction traps ethylene around roots, which causes transcriptional upregulation of Auxin Response Factor1, resulting in decreased root cortical cell wall thickness and thereby promoting root radial expansion.

DOI: 10.1038/s41586-025-09765-7

Source: https://www.nature.com/articles/s41586-025-09765-7