Physiological characterization of the Arabidopsis thaliana Oxidation-related Zinc Finger 1, a plasma membrane protein involved in oxidative stress

The CCCH-type zinc finger proteins are a superfamily containing tandem zinc-binding motifs involved in many aspects of plant growth and development. However, the precise role of these proteins involved in plant stress tolerance is poorly understood. This study was to examine the regulatory and funct...

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Bibliographic Details
Published in:Journal of plant research 2011-11, Vol.124 (6), p.699-705
Main Authors: Huang, Ping, Chung, Moon-Soo, Ju, Hyun-Woo, Na, Hyun-Seok, Lee, Dong Ju, Cheong, Hyeon-Sook, Kim, Cheol Soo
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Arabidopsis - genetics
Arabidopsis - metabolism
Arabidopsis Proteins - genetics
Arabidopsis Proteins - metabolism
Biomedical and Life Sciences
Cell Membrane - metabolism
Enzymes
Flowers & plants
Gene expression
Gene Expression Regulation, Plant
Hydrogen peroxide
Hydrogen Peroxide - metabolism
Life Sciences
Membrane Proteins - genetics
Membrane Proteins - metabolism
Molecular Sequence Data
Oxidative Stress
Peroxidation
Plant Biochemistry
Plant biology
Plant Ecology
Plant growth
Plant Physiology
Plant Sciences
Proteins
Short Communication
Zinc
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Summary:The CCCH-type zinc finger proteins are a superfamily containing tandem zinc-binding motifs involved in many aspects of plant growth and development. However, the precise role of these proteins involved in plant stress tolerance is poorly understood. This study was to examine the regulatory and functional role of the CCCH-type zinc finger protein, AtOZF1 ( At2g19810 ), under oxidative stress. Interestingly, the AtOZF1 protein was localized in the plasma membrane. The AtOZF1 transcripts were highly induced by treatment with hydrogen peroxide, abscisic acid and salinity. The AtOZF1 -overexpressing plants were relatively resistant to oxidative stress than wild-type and T-DNA insertion mutant atozf1 . Malondialdehyde, a decomposition product of lipid peroxidation, accumulated in atozf1 mutants more than in wild-type and AtOZF1 -overexpressing plants. Furthermore, atozf1 mutants displayed lower activities of catalase and guaiacol peroxidase, higher chlorosis, and down-regulated expression of antioxidant genes under oxidative stress. Taken together, these observations demonstrate that AtOZF1 is required for the tolerance of Arabidopsis to oxidative stress.
ISSN:0918-9440
1618-0860
DOI:10.1007/s10265-010-0397-3