A STUDY OF MEMBRANE-POTENTIAL ACROSS ISOLATED FRUIT CUTICLES FOR NACL AND CACL2 SOLUTIONS

被引：19

作者：

HEREDIA, A ^{[1
]}

BENAVENTE, J ^{[1
]}

机构：

[1] UNIV MALAGA,FAC CIENCIAS,DEPT FIS APLICADA,MALAGA,SPAIN

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1991年 / 1062卷 / 02期

关键词：

CUTICLE; MEMBRANE POTENTIAL; CATION EXCHANGE; IONIC DIFFUSION RATIO;

D O I：

10.1016/0005-2736(91)90398-R

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Fixed charge density and ionic diffusion ratio in an isolated tomato fruit cuticular membrane have been estimated from membrane potential measurements for NaCl and CaCl2 electrolyte solutions. The values of the parameters studied show marked differences in the electrical behaviour of the electrolytes, and evidence the asymmetric character of the cuticular membrane. While the membrane potential values for NaCl solutions can be explained in terms of a Donnan potential plus diffusion potentials, for CaCl2 solutions the membrane potential values agree very well with the diffusion potential. These facts could be explained by taking into account some structural features of the cuticular membrane.

引用

页码：239 / 244

页数：6

共 19 条

[11]

Martin JT, 1970, CUTICLES PLANTS

[12] SECONDARY AND TERTIARY STRUCTURE OF POLYSACCHARIDES IN SOLUTIONS AND GELS [J].

REES, DA ;

WELSH, EJ .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 1977, 16 (04) :214-223

[13]

SCHAFER WE, 1987, PLANT PHYSIOL, V83, P652

[14] ION-EXCHANGE PROPERTIES OF ISOLATED TOMATO FRUIT CUTICULAR MEMBRANE - EXCHANGE CAPACITY, NATURE OF FIXED CHARGES AND CATION SELECTIVITY [J].

SCHONHERR, J ;

BUKOVAC, MJ .

PLANTA, 1973, 109 (01) :73-93

[15] PLANT CUTICLES ARE POLYELECTROLYTES WITH ISOELECTRIC POINTS AROUND 3 [J].

SCHONHERR, J ;

HUBER, R .

PLANT PHYSIOLOGY, 1977, 59 (02) :145-150

[16] WATER PERMEABILITY OF PLANT CUTICLES - EFFECT OF TEMPERATURE ON DIFFUSION OF WATER [J].

SCHONHERR, J ;

ECKL, K ;

GRULER, H .

PLANTA, 1979, 147 (01) :21-26

[17]

TORELL T, 1956, DISCUSS FARADAY SOC, V21, P9

[18] LEAF CUTICLES BEHAVE AS ASYMMETRIC MEMBRANES - EVIDENCE FROM THE MEASUREMENT OF DIFFUSION POTENTIALS [J].

TYREE, MT ;

SCHERBATSKOY, TD ;

TABOR, CA .

PLANT PHYSIOLOGY, 1990, 92 (01) :103-109

[19] PENETRATION OF IONS THROUGH ISOLATED CUTICLES [J].

YAMADA, Y ;

BUKOVAC, MJ ;

WITTWER, SH .

PLANT PHYSIOLOGY, 1964, 39 (01) :28-&

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