| Changes in the composition of xylem sap during development of the spadix of skunk cabbage (Symplocarpus foetidus). | |
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MedLine Citation:
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PMID: 15973047 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The spadix of skunk cabbage, Symplocarpus foetidus, is thermogenic and maintains an internal temperature of around 20 degrees C even when the ambient air temperature drops below freezing. This homeothermic heat production is observed only during the stigma stage, and thereafter ceases at the male stage when pollen is shed. To clarify the regulatory mechanism by which the stigma stage-specific heat production occurs in the spadix, sugars, organic acids, and amino acids in xylem sap were analyzed and compared with those of post-thermogenic plants. Interestingly, no significant difference was observed in the total volume of xylem sap per fresh weight of the spadix between thermogenic (31.2+/-24.7 microl h(-1) g(-1)) and post-thermogenic (50.5+/-30.4 microl h(-1) g(-1)) plants. However, concentrations of sugars (sucrose, glucose, and fructose), organic acids (malate and succinate), and amino acids (Asp, Asn, Glu, Gln, Gly, and Ala) in xylem sap decreased remarkably in post-thermogenic plants. Our results indicate that the composition of the xylem sap differs during the development of the spadix of S. foetidus. |
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Authors:
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Yoshihiko Onda; Kikukatsu Ito |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Bioscience, biotechnology, and biochemistry Volume: 69 ISSN: 0916-8451 ISO Abbreviation: Biosci. Biotechnol. Biochem. Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-06-23 Completed Date: 2005-10-26 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 9205717 Medline TA: Biosci Biotechnol Biochem Country: Japan |
Other Details:
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Languages: eng Pagination: 1156-61 Citation Subset: IM |
Affiliation:
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Cryobiosystem Research Center, Faculty of Agriculture, Iwate University, Morioka, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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analysis Araceae / growth & development*, metabolism* Citric Acid / analysis Fructose / analysis Glucose / analysis Hot Temperature Malates / analysis Plant Components, Aerial / growth & development, metabolism* Succinic Acid / analysis Sucrose / analysis |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Malates; 110-15-6/Succinic Acid; 30237-26-4/Fructose; 50-99-7/Glucose; 57-50-1/Sucrose; 6915-15-7/malic acid; 77-92-9/Citric Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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