| Nitric oxide activates superoxide dismutase and ascorbate peroxidase to repress the cell death induced by wounding. | |
| | |
MedLine Citation:
|
PMID: 21833542 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Wounding caused by rain, wind, and pathogen may lead plants to onset defense response. Previous studies indicated that mechanical wounding stimulates plants to generate nitric oxide (NO) and hydrogen peroxide (H(2)O(2)). In this study, the functions of NO and H(2)O(2) after wounding in sweet potato (Ipomoea batatas cv. Tainung 57) was further analyzed. Mechanical wounding damaged cells and resulted in necrosis, but the presence of NO donors or NO scavenger might reduce or enhance the cell death caused by wounding, respectively. The amount of H(2)O(2) induced by wounding was also decreased or increased when plants were incubated with NO donors or NO scavenger, individually. These results indicate that NO may regulate H(2)O(2) generation to affect cell death. NO-induced proteins isolated from two-dimensional electrophoresis were identified to be Copper/Zinc superoxide dismutases (CuZnSODs). The activities of CuZnSODs and ascorbate peroxidase (APX) could be enhanced by NO. In addition, the expression of CuZnSOD and APX was induced by wounding via NO, and their expression was further stimulated by NO through the generation of cGMP. The influx of calcium ions and the activity of NADPH oxidase were also involved in the NO signal transduction pathway inducing APX expression. Collectively, the generation of H(2)O(2) in wounded plants might trigger cell death. Meanwhile, the production of NO induced by wounding stimulated signal transducers including cGMP, calcium ions, and H(2)O(2) to activate CuZnSOD and APX, which further decreased H(2)O(2) level and reduced the cell death caused by wounding. |
| | |
Authors:
|
Chih-Ching Lin; Pei-Ju Jih; Hsin-Hung Lin; Jeng-Shane Lin; Ling-Lan Chang; Yu-Hsing Shen; Shih-Tong Jeng |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-7-16 |
Journal Detail:
|
Title: Plant molecular biology Volume: - ISSN: 1573-5028 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
|
Created Date: 2011-8-11 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9106343 Medline TA: Plant Mol Biol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Institute of Plant Biology, National Taiwan University, Taipei 106, Taiwan, Republic of China, f92b42009@ntu.edu.tw. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Arabidopsis AtVPS15 is essential for pollen development and germination through modulating phosphati...
Next Document: Current concentrations and spatial and temporal trends in mercury in Great Lakes Herring Gull eggs, ...