中文摘要：

外长的 abscisic (骆驼毛的织物) 能禁止根生长并且在 Arabidopsis 的根尖端支持更多的根头发的形成。然而，位于根骆驼毛的织物发信号下面的分子的机制大部分是未知的。我们这里报导氢过氧化物(H_2O_2 ) 减少野类型的根生长，并且根生长上的 H_2O_2 的显型类似于骆驼毛的织物反应。在根系统的形态学的同时导致骆驼毛的织物的变化能被抗坏血酸部分在野类型颠倒并且在 NADPH 氧有缺陷者异种 atrbohF 和 atrbohC 废除了。进一步， ABAcan 在根房间导致 H_2O_2 累积并且提高 OX/1 的抄写水平，它为象在 Arabidopsis 的根头发生长那样的许多更 AOS 依赖的过程是必要的。当一个重要信号分子在 Arabidopsis 为调整骆驼毛的织物的根生长和开发被要求，我们的结果建议那 H_2O_2。

英文摘要：

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 （H2O2） reduces the root growth of wild type, and the phenotype of H2O2 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 abolished in NADPH oxidase defective mutant atrbohF and atrbohC. Further, ABA can induce H2O2 accumulation in the root cells and enhance transcription level of OXI1, which is necessary for many more AOS-dependent processes such as root hair growth in Arabidopsis. Our results suggest that H202 as an important signal molecule is required for the ABA-regulated root growth and development in Arabidopsis.