Root twisting drives halotropism via stress-induced microtubule reorientation
Plants have evolved signaling mechanisms that guide growth away from adverse environments that can cause yield losses. Root halotropism is a sodium-specific negative tropism that is crucial for surviving and thriving under high salinity. Although root halotropism was discovered some years ago, the underlying molecular and cellular mechanisms remain unknown. Here, we show that abscisic acid (ABA)-mediated root twisting determines halotropism in Arabidopsis. An ABA-activated SnRK2 protein kinase (SnRK2.6) phosphorylates the microtubule-associated protein SP2L at Ser406, which induces a change in the anisotropic cell expansion at the root transition zone and is required for root twisting during halotropism. Salt stress triggers SP2L-mediated cortical microtubule reorientation, which guides cellulose microfibril patterns. Our findings thus outline the molecular mechanism of root halotropism and indicate that anisotropic cell expansion through microtubule reorientation and microfibril deposition has a central role in mediating tropic responses.
NI Journal Papers
Science and Technology Commission of Shanghai Municipality[22ZR1481400] ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Lundbeckfonden[R346-2020-1546]
|ESI Research Field|
MOLECULAR BIOLOGY & GENETICS
Cited Times [WOS]:4
|Document Type||Journal Article|
|Department||Institute of Advanced Biotechnology|
1.Shanghai Center for Plant Stress Biology,CAS Center for Excellence in Molecular Plant Sciences,Chinese Academy of Sciences,Shanghai,200032,China
2.Department of Plant & Environmental Sciences,University of Copenhagen,Frederiksberg C,1871,Denmark
3.Department of Horticulture and Landscape Architecture,Purdue University,West Lafayette,47907,United States
4.Institute of Advanced Biotechnology and School of Life Sciences,Southern University of Science and Technology,Shenzhen,518055,China
5.Center for Advanced Bioindustry Technologies,Chinese Academy of Agricultural Sciences,Beijing,100081,China
6.Copenhagen Plant Science Center,University of Copenhagen,Frederiksberg C,1871,Denmark
7.Joint International Research Laboratory of Metabolic & Developmental Sciences,State Key Laboratory of Hybrid Rice,SJTU-University of Adelaide Joint Centre for Agriculture and Health,School of Life Sciences and Biotechnology,Shanghai Jiao Tong University,Shanghai,China
Yu，Bo,Zheng，Wenna,Xing，Lu,et al. Root twisting drives halotropism via stress-induced microtubule reorientation[J]. DEVELOPMENTAL CELL,2022,57(20):2412-2425.e6.
Yu，Bo,Zheng，Wenna,Xing，Lu,Zhu，Jian Kang,Persson，Staffan,&Zhao，Yang.(2022).Root twisting drives halotropism via stress-induced microtubule reorientation.DEVELOPMENTAL CELL,57(20),2412-2425.e6.
Yu，Bo,et al."Root twisting drives halotropism via stress-induced microtubule reorientation".DEVELOPMENTAL CELL 57.20(2022):2412-2425.e6.
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