Role of auxin-induced reactive oxygen species in root gravitropism
Role of auxin-induced reactive oxygen species in root gravitropism
复制标题
DOI：
10.1104/pp.126.3.1055
复制
发表时间：
2001-07-01
期刊：
影响因子：
7.4
通讯作者：
Lee, JS
中科院分区：
文献类型：
--
作者：
Joo, JH;Bae, YS;Lee, JS
我们报道了我们对根向地性的研究，表明活性氧（ROS）可能在生长素介导的信号转导中起下游成分的作用。一个短暂的增加细胞内的活性氧浓度在凸内皮导致无论是重力刺激或单方面应用生长素垂直根。用生长素转运抑制剂N-1-naphthalamic acid预处理的垂直根，单方面施加ROS也会引起根弯曲。此外，清除活性氧的抗氧化剂（N-乙酰半胱氨酸，抗坏血酸，和Trolox）抑制根向地性。这些结果表明，ROS的产生在根向重力性中起作用。
We report our studies on root gravitropism indicating that reactive oxygen species (ROS) may function as a downstream component in auxin-mediated signal transduction. A transient increase in the intracellular concentration of ROS in the convex endodermis resulted from either gravistimulation or unilateral application of auxin to vertical roots. Root bending was also brought about by unilateral application of ROS to vertical roots pretreated with the auxin transport inhibitor N-1-naphthylyhthalamic acid. Furthermore, the scavenging of ROS by antioxidants (N-acetylcysteine, ascorbic acid, and Trolox) inhibited root gravitropism. These results indicate that the generation of ROS plays a role in root gravitropism.