| Glycine betaine involvement in freezing tolerance and water stress in Arabidopsis thaliana. | |
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MedLine Citation:
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PMID: 11378169 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Levels of endogenous glycine betaine in the leaves were measured in response to cold acclimation, water stress and exogenous ABA application in Arabidopsis thaliana. The endogenous glycine betaine level in the leaves increased sharply during cold acclimation treatment as plants gained freezing tolerance. When glycine betaine (10 mM) was applied exogenously to the plants as a foliar spray, the freezing tolerance increased from -3.1 to -4.5 degrees C. In addition, when ABA (1 mM) was applied exogenously, the endogenous glycine betaine level and the freezing tolerance in the leaves increased. However, the increase in the leaf glycine betaine level induced by ABA was only about half of that by the cold acclimation treatment. Furthermore, when plants were subjected to water stress (leaf water potential of approximately -1.6 MPa), the endogenous leaf glycine betaine level increased by about 18-fold over that in the control plants. Water stress lead to significant increase in the freezing tolerance, which was slightly less than that induced by the cold acclimation treatment. The results suggest that glycine betaine is involved in the induction of freezing tolerance in response to cold acclimation, ABA, and water stress in Arabidopsis plants. |
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Authors:
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W Xing; C B. Rajashekar |
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Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: Environmental and experimental botany Volume: 46 ISSN: 0098-8472 ISO Abbreviation: Environ. Exp. Bot. Publication Date: 2001 Aug |
Date Detail:
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Created Date: 2001-May-29 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7610775 Medline TA: Environ Exp Bot Country: - |
Other Details:
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Languages: ENG Pagination: 21-28 Citation Subset: - |
Affiliation:
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Department of Crop Science, North Carolina State University, 27695-7620, Raleigh, NC, USA |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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