Hydrogen peroxide modulates abscisic acid signaling in root growth and development in Arabidopsis
文献类型: 外文期刊
作者: Bai Ling 1 ; Zhou Yun 2 ; Zhang XiaoRan 2 ; Song ChunPeng 2 ; Cao MingQing 2 ;
作者机构: 1.Henan Univ, Dept Biol, Henan Key Lab Plant Stress Biol, Kaifeng 475001, Peoples R China
2.Henan Univ, Dept Biol, Henan Key Lab Plant Stress Biol, Kaifeng 475001, Peoples R China; Capital Normal Univ, Dept Biol, Beijing 100037, Peoples R China; Beijing Agrobiotechnol Res Ctr, Beijing 100097, Peoples R China
关键词: Arabidopsis;root growth;ABA;H_2O_2
期刊名称:CHINESE SCIENCE BULLETIN ( 影响因子:1.649; 五年影响因子:1.738 )
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收录情况: SCI
摘要: Exogenous abscisic acid (ABA) can inhibit root growth and promote formation of more root hairs in the root tip of Arabidopsis. However, the molecular mechanisms that underlie root ABA signaling are largely unknown. We report here that hydrogen peroxide (H_2O_2) reduces the root growth of wild type, and the phenotype of H_2O_2 on the root growth is similar to ABA response. Meanwhile ABA-induced changes in the morphology of root system can be partly reversed by ascorbic acid in wild type and abolishedin NADPH oxidase defective mutant atrbohF and atrbohC. Further, ABA can induce H_2O_2 accumulation in the root cells and enhance transcription level of OX/1, which is necessary for many more AOS-dependent processes such as root hair growth in Arabidopsis. Our results suggest that H_2O_2 as an important signal molecule is required for the ABA-regulated root growth and development in Arabidopsis.
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