TY - JOUR
T1 - Role of auxin-induced reactive oxygen species in root gravitropism
AU - Jung Hee Joo, Hee Joo
AU - Yun Soo Bae, Soo Bae
AU - June Seung Lee, Seung Lee
PY - 2001
Y1 - 2001
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=0034960311&partnerID=8YFLogxK
U2 - 10.1104/pp.126.3.1055
DO - 10.1104/pp.126.3.1055
M3 - Article
C2 - 11457956
AN - SCOPUS:0034960311
SN - 0032-0889
VL - 126
SP - 1055
EP - 1060
JO - Plant Physiology
JF - Plant Physiology
IS - 3
ER -