A. CHAMEL, Corresponding Author Equipe Transferts dans les Systèmes Végétaux/DBMS, Direction des Sciences du Vivant, C.E.N. GrenobleA. Chamel, Equipe Transferts dans les Systèmes Végétaux/DBMS. CENG, 85X, 38041 Grenoble Cedex, France.Search for more papers by this authorM. PINERI, Groupe de Physico-Chimie Moléculaire, Département de Recherche Fondamentale, C.E.N. GrenobleSearch for more papers by this authorM. ESCOUBES, Laboratoire d\'Etudes des Matériaux Plastiques et des Biomatériaux II, Université Claude Bernard, Lyon I, FranceSearch for more papers by this author A. CHAMEL, Corresponding Author Equipe Transferts dans les Systèmes Végétaux/DBMS, Direction des Sciences du Vivant, C.E.N. GrenobleA. Chamel, Equipe Transferts dans les Systèmes Végétaux/DBMS. CENG, 85X, 38041 Grenoble Cedex, France.Search for more papers by this authorM. PINERI, Groupe de Physico-Chimie Moléculaire, Département de Recherche Fondamentale, C.E.N. GrenobleSearch for more papers by this authorM. ESCOUBES, Laboratoire d\'Etudes des Matériaux Plastiques et des Biomatériaux II, Université Claude Bernard, Lyon I, FranceSearch for more papers by this author Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URLShare a linkShare onEmailFacebookTwitterLinked InRedditWechat Abstract. The water sorption by cuticular membranes (CM) isolated from both leaves and fruit and representing different structural and chemical cuticular types, was measured over the whole range of relative humidities using a magnetic suspension microbalance. The sorption isotherms were generally not linear and sorption increased more rapidly at the highest values of relative humidity. The highest values of water content, at 80–99% r.h., measured for the seven species ranged from 1.1 to 7.7% of the dehydrated weight. Extraction of the soluble cuticular lipids did not result in a decrease of sorption, but only in a lower interspecific dispersion. There was a drastic reduction (63%) in water sorption when polymer matrix membranes (MX) were partially acid-hydrolysed; but methylation or charging with iron of (MX) did not have any significant effect on water sorption. The data obtained are discussed in relation to cuticular permeability. Two determinants of water permeability were determined: the partition coefficient (K) relating the equilibrium Water concentration of the cuticle to that of the surrounding atmosphere; and the diffusion coefficient (D), calculated from the half-times of the sorption process in kinetic measurements. The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Please check your email for instructions on resetting your password. If you do not receive an email within 10 minutes, your email address may not be registered, and you may need to create a new Wiley Online Library account. Can\'t sign in? Forgot your username? Enter your email address below and we will send you your username If the address matches an existing account you will receive an email with instructions to retrieve your username

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