文献类型： 外文期刊

作者： Zhang, Yang ¹ ; Guo, Jinliang ¹ ; Chen, Mo ¹ ; Li, Lun ¹ ; Wang, Lihua ³ ; Huang, Chao-Feng ¹ ;

作者机构： 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing, Jiangsu, Peoples R China

2.Chinese Acad Sci, CAS Ctr Excellence Mol Plant Sci, Shanghai Ctr Plant Stress Biol, Natl Key Lab Plant Mol Genet, Shanghai, Peoples R China

3.Yunnan Acad Agr Sci, Flower Res Inst, Ku

关键词： aluminum toxicity;Arabidopsis thaliana;ATR;cell cycle checkpoint;DNA damage;external;internal

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2018 年 9 卷

页码：

收录情况： SCI

摘要： Aluminum (Al) can target multiple sites of root cells for toxicity, including the cell wall, the plasma membrane and symplastic components. Previous work revealed that the cell cycle checkpoint regulator (ATR) Ataxia Telangiectasia-mutated and Rad3-related is required for Al toxicity-induced root growth inhibition in als3 and that the symplastic component DNA is an important target site of Al for the toxicity. However, whether monitoring DNA integrity through ATR-regulated pathway is required for Al-induced root growth inhibition in other Al-sensitive mutants remains unknown. In this study, we demonstrated that the atr mutation could also rescue the Al hypersensitivity and Al-induced cell cycle arrest in star1, which supports the hypothesis that ALS3 and STAR1 function together to be involved in the detoxification of Al in Arabidopsis. However, mutation of ATR could not rescue the Al-sensitive phenotype of almt1 or stop1, both of which are defective in external detoxification mechanisms of Al. We further showed that the Al hypersensitivity and Al-induced quiescent center (QC) differentiation in als1 could also be rescued by the atr mutation. Therefore, our results suggest that ATR-regulated pathway is involved in the modulation of internal Al toxicity-mediated root growth inhibition in Arabidopsis.