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PMID: 11457956 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Role of auxin-induced reactive oxygen species in root gravitropism.

Plant physiology ·Vol. 126 ·No. 3 ·2001-07-00 ·Pages 1055-60

Joo JH, Bae YS, Lee JS

Abstract

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.

MeSH Terms
Free Radical Scavengers/metabolism Gravitropism Indoleacetic Acids/physiology Phthalimides/pharmacology Plant Roots/physiology Reactive Oxygen Species/metabolism Zea mays/physiology
Chemicals
Free Radical Scavengers Indoleacetic Acids Phthalimides Reactive Oxygen Species alpha-naphthylphthalamic acid
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Joo J H
Center for Cell Signaling Research, Department of Biological Sciences, Ewha Womans University, Seoul 120-750, South Korea.
Bae Y S
Lee J S
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
0032-0889
DOI
10.1104/pp.126.3.1055
Published
2001-07-00
Pages
1055-60
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC116462
Subset
IM
External Links
PubMed source DOI: 10.1104/pp.126.3.1055 PMC Full Text View journal details
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