The IPGA1-ANGUSTIFOLIA module regulates microtubule organisation and pavement cell shape in Arabidopsis
文献类型： 外文期刊
作者： Chen, Binqing 1 ; Dang, Xie 1 ; Bai, Wenting 1 ; Liu, Min 1 ; Li, Ying 1 ; Zhu, Lilan 1 ; Yang, Yanqiu 1 ; Yu, Peihang 1 ; Ren, Huibo 1 ; Huang, Dingquan 1 ; Pan, Xue 5 ; Wang, Haifeng 6 ; Qin, Yuan 7 ; Feng, Shiliang 8 ; Wang, Qin 1 ; Lin, Deshu 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Basic Forestry & Prote Res Ctr, Fujian Prov Key Lab Plant Funct Biol, Key Lab Minist Educ Genet,Breeding & Multiple Uti, Fuzhou 350002, Peoples R China
2.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
3.Fujian Agr & Forestry Univ, Coll Agr, Fuzhou 350002, Peoples R China
4.Fujian Acad Agr Sci, Agr Ecol Inst, Fuzhou 350013, Peoples R China
5.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA
6.Guangxi Univ, State Key Lab Conservat & Utilizat Subtrop Agrobi, Nanning 530004, Peoples R China
7.Fujian Agr & Forestry Univ, Coll Life Sci, Fujian Prov Key Lab Haixia Appl Plant Syst Biol, Fuzhou 350002, Peoples R China
8.Ningbo Univ, Sch Mech Engn & Mech, Smart Mat & Adv Struct Lab, Ningbo 315211, Peoples R China
关键词： Arabidopsis; cortical microtubule; mechanical stress; microtubule organisation; pavement cells
期刊名称：NEW PHYTOLOGIST （ 影响因子：10.323； 五年影响因子：10.768 ）
ISSN： 0028-646X
年卷期：
页码：
收录情况： SCI
摘要： Plant cells continuously experience mechanical stress resulting from the cell wall that bears internal turgor pressure. Cortical microtubules align with the predicted maximal tensile stress direction to guide cellulose biosynthesis and therefore results in cell wall reinforcement. We have previously identified Increased Petal Growth Anisotropy (IPGA1) as a putative microtubule-associated protein in Arabidopsis, but the function of IPGA1 remains unclear. Here, using the Arabidopsis cotyledon pavement cell as a model, we demonstrated that IPGA1 forms protein granules and interacts with ANGUSTIFOLIA (AN) to cooperatively regulate microtubule organisation in response to stress. Application of mechanical perturbations, such as cell ablation, led to microtubule reorganisation into aligned arrays in wild-type cells. This microtubule response to stress was enhanced in the IPGA1 loss-of-function mutant. Mechanical perturbations promoted the formation of IPGA1 granules on microtubules. We further showed that IPGA1 physically interacted with AN both in vitro and on microtubules. The ipga1 mutant alleles exhibited reduced interdigitated growth of pavement cells, with smooth shape. IPGA1 and AN had a genetic interaction in regulating pavement cell shape. Furthermore, IPGA1 genetically and physically interacted with the microtubule-severing enzyme KATANIN. We propose that the IPGA1-AN module regulates microtubule organisation and pavement cell shape.
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