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Citation
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HERO ID
1519070
Reference Type
Journal Article
Title
Auxin and its transport play a role in plant tolerance to arsenite-induced oxidative stress in Arabidopsis thaliana
Author(s)
Krishnamurthy, A; Rathinasabapathi, B
Year
2013
Is Peer Reviewed?
1
Journal
Plant, Cell and Environment
ISSN:
0140-7791
EISSN:
1365-3040
Volume
36
Issue
10
Page Numbers
1838-1849
Language
English
PMID
23489261
DOI
10.1111/pce.12093
Web of Science Id
WOS:000323839000008
Abstract
The role of auxin in plant development is well known; however, its possible function in root response to abiotic stress is poorly understood. In this study, we demonstrate a novel role of auxin transport in plant tolerance to oxidative stress caused by arsenite. Plant response to arsenite [As(III)] was evaluated by measuring root growth and markers for stress on seedlings treated with control or As(III)-containing medium. Auxin transporter mutants aux1, pin1 and pin2 were significantly more sensitive to As(III) than the wild type (WT). Auxin transport inhibitors significantly reduced plant tolerance to As(III) in the WT, while exogenous supply of indole-3-acetic acid improved As(III) tolerance of aux1 and not that of WT. Uptake assays using H(3) -IAA showed As(III) affected auxin transport in WT roots. As(III) increased the levels of H2 O2 in WT but not in aux1, suggesting a positive role for auxin transport through AUX1 on plant tolerance to As(III) stress via reactive oxygen species (ROS)-mediated signalling. Compared to the WT, the mutant aux1 was significantly more sensitive to high-temperature stress and salinity, also suggesting auxin transport influences a common element shared by plant tolerance to arsenite, salinity and high-temperature stress.
Keywords
arsenite; auxin transport; indole-3-acetic acid; lateral roots; root development
Tags
IRIS
•
Arsenic (Inorganic)
1. Literature
Lit search updates through Oct 2015
3. Hazard ID Screening
Other potentially supporting studies
•
Inorganic Arsenic (7440-38-2) [Final 2025]
PubMed
Considered New
PubMed
Considered New
PubMed
WOS
Considered New
2. Lit Search Updates through Oct 2015
PubMed
WOS
Considered
7. Other Studies through Oct 2015
Ecology
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