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Mechanosensing antagonizes ethylene signaling to promote root gravitropism in rice

文献类型: 外文期刊

作者: Wang, Han-Qing 1 ; Zhao, Xing-Yu 1 ; Tang, Zhong 1 ; Huang, Xin-Yuan 1 ; Wang, Peng 1 ; Zhang, Wenhua 2 ; Zhang, Yunhui 3 ; Luan, Sheng 4 ; Zhao, Fang-Jie 1 ;

作者机构: 1.Nanjing Agr Univ, Coll Resources & Environm Sci, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing 210095, Peoples R China

2.Nanjing Agr Univ, Coll Life Sci, State Key Lab Crop Genet & Germplasm Enhancement &, Nanjing 210095, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Germplasm Resources & Biotechnol, Nanjing, Peoples R China

4.Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA

期刊名称:NATURE COMMUNICATIONS ( 影响因子:15.7; 五年影响因子:17.2 )

ISSN:

年卷期: 2025 年 16 卷 1 期

页码:

收录情况: SCI

摘要: Root gravitropism relies on gravity perception by the root cap and requires tightly regulated phytohormone signaling. Here, we isolate a rice mutant that displays root coiling in hydroponics but normal gravitropic growth in soil. We identify COILING ROOT IN WATER 1 (CRW1) encoding an ETHYLENE-INSENSITIVE3 (EIN3)-BINDING F-BOX PROTEIN (OsEBF1) as the causative gene for the mutant phenotype. We show that the OsCRW1-EIN3 LIKE 1 and 2 (OsEIL1/2)-ETHYLENE RESPONSE FACTOR 82 (OsERF82) module controls the production of reactive oxygen species in the root tip, subsequently impacting root cap stability, polar localization of PIN-FORMED 2 (OsPIN2), symmetric distribution of auxin, and ultimately gravitropic growth of roots. The OsEIL1/2-OsERF82 ethylene signaling module is effectively impeded by applying gentle mechanical resistance to root tips, including growing in water-saturated paddy soil. We further show that mechanosensing-induced calcium signaling is required and sufficient for antagonizing the ethylene signaling pathway. This study has revealed previously unanticipated interplay among ethylene, auxin, and mechanosensing in the control of plant gravitropism.

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