| Leaf water content and palisade cell size. | |
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MedLine Citation:
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PMID: 16539605 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The palisade cell sizes in leaves of Eucalyptus pauciflora were estimated in paradermal sections of cryo-fixed leaves imaged in the cryo-scanning electron microscope, as a quantity called the cell area fraction (CAF). Cell sizes were measured in detached leaves as a function of leaf water content, in intact leaves in the field during a day"s transpiration as a function of balance pressure of adjacent leaves, and on leaf disks equilibrated with air of relative humidities from 100 to 58%. Values of CAF ranged from 0.82 at saturation to approx. 0.3 in leaves dried to a relative water content (RWC) of 0.5, and in the field to approx. 0.58 at 15 bar (1.5 MPa) balance pressure. At a CAF of 0.58, the moisture content of the cell walls is in equilibrium with air at 90% relative humidity, which is the estimated relative humidity in the intercellular spaces. It is shown that at this moisture content, the cell walls could be exerting a pressure of approx. 50 bar on the cell contents. |
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Authors:
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M J Canny; C X Huang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The New phytologist Volume: 170 ISSN: 0028-646X ISO Abbreviation: New Phytol. Publication Date: 2006 |
Date Detail:
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Created Date: 2006-03-16 Completed Date: 2006-05-09 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882884 Medline TA: New Phytol Country: England |
Other Details:
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Languages: eng Pagination: 75-85 Citation Subset: IM |
Affiliation:
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Ecosystem Dynamics Group, Research School of Biological Sciences, Australian National University, Canberra, ACT 0200, Australia. martin.canny@anu.edu.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Cell Size Chlorophyll / metabolism Cryoelectron Microscopy Electron Transport / physiology Eucalyptus / cytology*, metabolism, ultrastructure Humidity Plant Leaves / cytology*, metabolism, ultrastructure Water / metabolism* |
| Chemical | |
Reg. No./Substance:
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1406-65-1/Chlorophyll; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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