| The relationship between water binding and desiccation tolerance in tissues. | |
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MedLine Citation:
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PMID: 11539706 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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In an effort to define the nature of desiccation tolerance, a comparison of the water sorption characteristics was made between tissues that were resistant and tissues that were sensitive to desiccation. Water sorption isotherms were constructed for germinated and ungerminated soybean axes and also for fronds of several species of Polypodium with varying tolerance to dehydration. The strength of water binding was determined by van't Hoff as well as D'Arcy/Watt analyses of the isotherms at 5, 15, and/or 25 degrees C. Tissues which were sensitive to desiccation had a poor capacity to bind water tightly. Tightly bound water can be removed from soybean and pea seeds by equilibration at 35 degrees C over very low relative humidities; this results in a reduction in the viability of the seed. We suggest that region 1 water (i.e. water bound with very negative enthalpy values) is an important component of desiccation tolerance. |
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Authors:
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C W Vertucci; A C Leopold |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Plant physiology Volume: 85 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 1987 |
Date Detail:
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Created Date: 1997-10-10 Completed Date: 1997-10-10 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0401224 Medline TA: Plant Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 232-8 Citation Subset: S |
Affiliation:
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Department of Plant Biology, Cornell University, Ithaca, New York 14853, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Desiccation* Germination / physiology Linear Models Models, Biological Plant Physiological Phenomena* Plants / metabolism* Seeds / physiology Soybeans / metabolism*, physiology* Temperature Water / metabolism* |
| Chemical | |
Reg. No./Substance:
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7732-18-5/Water |
| Investigator | |
Investigator/Affiliation:
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A C Leopold / Cornell U, Ithaca, NY |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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