| Exogenous gamma-aminobutyric acid alleviates oxidative damage caused by aluminium and proton stresses on barley seedlings. | |
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MedLine Citation:
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PMID: 20549790 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Proton (H(+)) and aluminium (Al(3+)) toxicities are major factors limiting crop production on acid soils, while gamma-aminobutyric acid (GABA) is a non-protein amino acid involved in various stress tolerances in plants. In this study, to determine whether exogenous GABA is functional in alleviating oxidative stress induced by H(+) and Al(3+) toxicities, the antioxidant defence response regulated by GABA was investigated in barley (Hordeum vulgare L.). RESULTS: After 24 h treatments of seedlings under H(+), Al(3+) and combined stresses with and without GABA, morphological and biochemical assays were conducted. It was observed that the inhibition of seedling root elongation caused by Al(3+) and H(+) toxicities was significantly mitigated by GABA. The amount of carbonylated proteins with molecular masses of 14.4-97 kDa was decreased. The activities of antioxidant enzymes were enhanced, the content of malondialdehyde was reduced and the accumulation of reactive oxygen species (ROS), as shown by staining roots with nitroblue tetrazolium, declined in GABA-treated seedlings. CONCLUSION: GABA can alleviate oxidative damage caused by H(+) and Al(3+) toxicities in barley seedlings by activating antioxidant defence responses and reducing the elevated levels of carbonylated proteins caused by ROS. |
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Authors:
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Hongmiao Song; Xiangbin Xu; Hua Wang; Huizhong Wang; Yuezhi Tao |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of the science of food and agriculture Volume: 90 ISSN: 1097-0010 ISO Abbreviation: J. Sci. Food Agric. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-06-15 Completed Date: 2010-10-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376334 Medline TA: J Sci Food Agric Country: England |
Other Details:
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Languages: eng Pagination: 1410-6 Citation Subset: IM |
Affiliation:
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The Institute of Crop and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aluminum
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antagonists & inhibitors,
toxicity* Antioxidants / pharmacology* Catalase / metabolism Hordeum / drug effects*, enzymology, metabolism Malondialdehyde / metabolism Nitroblue Tetrazolium / chemistry Oxidative Stress / drug effects* Peroxidases / metabolism Plant Roots / anatomy & histology, drug effects, growth & development Protein Carbonylation / drug effects Protons / adverse effects* Reactive Oxygen Species / metabolism Seedling / anatomy & histology, drug effects*, metabolism Superoxide Dismutase / metabolism Time Factors gamma-Aminobutyric Acid / pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Antioxidants; 0/Protons; 0/Reactive Oxygen Species; 298-83-9/Nitroblue Tetrazolium; 542-78-9/Malondialdehyde; 56-12-2/gamma-Aminobutyric Acid; 7429-90-5/Aluminum; EC 1.11.1.-/Peroxidases; EC 1.11.1.6/Catalase; EC 1.15.1.1/Superoxide Dismutase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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