PT  - JOURNAL ARTICLE
AU  - Joo, Jung Hee
AU  - Bae, Yun Soo
AU  - Lee, June Seung
TI  - Role of Auxin-Induced Reactive Oxygen Species in Root Gravitropism
AID  - 10.1104/pp.126.3.1055
DP  - 2001 Jul 01
TA  - Plant Physiology
PG  - 1055--1060
VI  - 126
IP  - 3
4099  - http://www.plantphysiol.org/content/126/3/1055.short
4100  - http://www.plantphysiol.org/content/126/3/1055.full
SO  - Plant Physiol.2001 Jul 01; 126
AB  - 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-naphthylphthalamic 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.