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Water permeability of isolated cuticular membranes: The effect of cuticular waxes on diffusion of water.
Planta 1976; 131(2):159-64P

Abstract

The water permeability of astomatous cuticular membranes isolated from Citrus aurantium L. leaves, pear (Pyrus communis L.) leaves and onion (Allium cepa L.) bulb scales was determined before and after extraction of cuticular waxes with lipid solvents. In pear, the permeability coefficients for diffusion of tritiated water across cuticular membranes (CM) prior to extraction [P d(CM)] decreased by a factor of four during leaf expansion. In all three species investigated P d(CM) values of cuticular membranes from fully expanded leaves varied between 1 to 2×10(-7) cm(-3) s(-1)·P d(CM) values were not affected by pH. Extraction of cuticular waxes from the membranes increased their water permeability by a factor of 300 to 500. Permeability coefficients for diffusion of THO across the cutin matrix (MX) after extraction [P d(MX)] increased with increasing pH. P dvalues were not inversely proportional to the thickness of cuticular membranes. By treating the cutin matrix and cuticular waxes as two resistances acting in series it was shown that the water permeability of cuticles is completely determined by the waxes. The lack of the P d(CM) values to respond to pH appeared to be due to structural effects of waxes in the cutin matrix. Cuticular membranes from the submerse leaves of the aquatic plant Potamogeton lucens L. were three orders of magnitude more permeable to water than the cuticular membranes of the terrestrial species investigated.

Authors+Show Affiliations

Institut für Botanik und Mikrobiologie, Technische Universität München, Arcisstraβe 21, D-8000, München 2, Federal Republic of Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24424766

Citation

Schönherr, J. "Water Permeability of Isolated Cuticular Membranes: the Effect of Cuticular Waxes On Diffusion of Water." Planta, vol. 131, no. 2, 1976, pp. 159-64.
Schönherr J. Water permeability of isolated cuticular membranes: The effect of cuticular waxes on diffusion of water. Planta. 1976;131(2):159-64.
Schönherr, J. (1976). Water permeability of isolated cuticular membranes: The effect of cuticular waxes on diffusion of water. Planta, 131(2), pp. 159-64. doi:10.1007/BF00389989.
Schönherr J. Water Permeability of Isolated Cuticular Membranes: the Effect of Cuticular Waxes On Diffusion of Water. Planta. 1976;131(2):159-64. PubMed PMID: 24424766.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Water permeability of isolated cuticular membranes: The effect of cuticular waxes on diffusion of water. A1 - Schönherr,J, PY - 1976/03/17/received PY - 1976/04/01/accepted PY - 2014/1/16/entrez PY - 1976/1/1/pubmed PY - 1976/1/1/medline SP - 159 EP - 64 JF - Planta JO - Planta VL - 131 IS - 2 N2 - The water permeability of astomatous cuticular membranes isolated from Citrus aurantium L. leaves, pear (Pyrus communis L.) leaves and onion (Allium cepa L.) bulb scales was determined before and after extraction of cuticular waxes with lipid solvents. In pear, the permeability coefficients for diffusion of tritiated water across cuticular membranes (CM) prior to extraction [P d(CM)] decreased by a factor of four during leaf expansion. In all three species investigated P d(CM) values of cuticular membranes from fully expanded leaves varied between 1 to 2×10(-7) cm(-3) s(-1)·P d(CM) values were not affected by pH. Extraction of cuticular waxes from the membranes increased their water permeability by a factor of 300 to 500. Permeability coefficients for diffusion of THO across the cutin matrix (MX) after extraction [P d(MX)] increased with increasing pH. P dvalues were not inversely proportional to the thickness of cuticular membranes. By treating the cutin matrix and cuticular waxes as two resistances acting in series it was shown that the water permeability of cuticles is completely determined by the waxes. The lack of the P d(CM) values to respond to pH appeared to be due to structural effects of waxes in the cutin matrix. Cuticular membranes from the submerse leaves of the aquatic plant Potamogeton lucens L. were three orders of magnitude more permeable to water than the cuticular membranes of the terrestrial species investigated. SN - 0032-0935 UR - https://www.unboundmedicine.com/medline/citation/24424766/Water_permeability_of_isolated_cuticular_membranes:_The_effect_of_cuticular_waxes_on_diffusion_of_water_ L2 - https://www.lens.org/lens/search?q=citation_id:24424766 DB - PRIME DP - Unbound Medicine ER -
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