A root cap-localized NAC transcription factor controls root halotropic response to salt stress in Arabidopsis
文献类型： 外文期刊
作者： Zheng, Lulu 1 ; Hu, Yongfeng 4 ; Yang, Tianzhao 5 ; Wang, Zhen 1 ; Wang, Daoyuan 1 ; Jia, Letian 1 ; Xie, Yuanming 1 ; Luo, Long 5 ; Qi, Weicong 6 ; Lv, Yuanda 6 ; Beeckman, Tom 2 ; Xuan, Wei 1 ; Han, Yi 5 ;
作者机构： 1.Nanjing Agr Univ, Sanya Inst, Coll Resources & Environm Sci, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing, Peoples R China
2.Univ Ghent, Dept Plant Biotechnol & Bioinformat, Technol Pk 71, B-9052 Ghent, Belgium
3.VIB UGent Ctr Plant Syst Biol, Technol Pk 71, B-9052 Ghent, Belgium
4.China Three Gorges Univ, Biotechnol Res Ctr, Key Lab Three Gorges Reg Plant Genet & Germplasm E, Yichang, Peoples R China
5.Anhui Agr Univ, Sch Life Sci, Natl Engn Lab Crop Stress Resistence Breeding, Hefei 230036, Peoples R China
6.Jiangsu Acad Agr Sci, Excellence & Innovat Ctr, Nanjing 210014, Peoples R China
期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）
ISSN：
年卷期： 2024 年 15 卷 1 期
页码：
收录情况： SCI
摘要： Plants are capable of altering root growth direction to curtail exposure to a saline environment (termed halotropism). The root cap that surrounds root tip meristematic stem cells plays crucial roles in perceiving and responding to environmental stimuli. However, how the root cap mediates root halotropism remains undetermined. Here, we identified a root cap-localized NAC transcription factor, SOMBRERO (SMB), that is required for root halotropism. Its effect on root halotropism is attributable to the establishment of asymmetric auxin distribution in the lateral root cap (LRC) rather than to the alteration of cellular sodium equilibrium or amyloplast statoliths. Furthermore, SMB is essential for basal expression of the auxin influx carrier gene AUX1 in LRC and for auxin redistribution in a spatiotemporally-regulated manner, thereby leading to directional bending of roots away from higher salinity. Our findings uncover an SMB-AUX1-auxin module linking the role of the root cap to the activation of root halotropism. This study reports that the SOMBRERO, a root cap-localized transcription factor, determines root halotropic response to salt stress via spatiotemporally modulating AUX1-depdenent auxin redistribution in the root tip.
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