| Cuticular permeance in relation to wax and cutin development along the growing barley (Hordeum vulgare) leaf. | |
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MedLine Citation:
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PMID: 17171372 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The developing leaf three of barley provides an excellent model system for the direct determination of relationships between amounts of waxes and cutin and cuticular permeance. Permeance of the cuticle was assessed via the time-course of uptake of either toluidine blue or (14)C-labelled benzoic acid ([(14)C] BA) along the length of the developing leaf. Toluidine blue uptake only occurred within the region 0-25 mm from the point of leaf insertion (POLI). Resistance--the inverse of permeance--to uptake of [(14)C] BA was determined for four leaf regions and was lowest in the region 10-20 mm above POLI. At 20-30 and 50-60 mm above POLI, it increased by factors of 6 and a further 32, respectively. Above the point of emergence of leaf three from the sheath of leaf two, which was 76-80 mm above POLI, resistance was as high as at 50-60 mm above POLI. GC-FID/MS analyses of wax and cutin showed that: (1) the initial seven fold increase in cuticular resistance coincided with increase in cutin coverage and appearance of waxes; (2) the second, larger and final increase in cuticle resistance was accompanied by an increase in wax coverage, whereas cutin coverage remained unchanged; (3) cutin deposition in barley leaf epidermis occurred in parallel with cell elongation, whereas deposition of significant amounts of wax commenced as cells ceased to elongate. |
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Authors:
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Andrew Richardson; Tobias Wojciechowski; Rochus Franke; Lukas Schreiber; Gerhard Kerstiens; Mike Jarvis; Wieland Fricke |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-12-14 |
Journal Detail:
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Title: Planta Volume: 225 ISSN: 0032-0935 ISO Abbreviation: Planta Publication Date: 2007 May |
Date Detail:
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Created Date: 2007-04-19 Completed Date: 2007-07-11 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1250576 Medline TA: Planta Country: Germany |
Other Details:
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Languages: eng Pagination: 1471-81 Citation Subset: IM |
Affiliation:
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Division of Biological Sciences, University of Paisley, Paisley, PA1 2BE, Scotland, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Hordeum
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metabolism* Membrane Lipids / metabolism* Plant Leaves / growth & development*, metabolism* Time Factors Waxes / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Membrane Lipids; 0/Waxes; 54990-88-4/cutin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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