Selectivity of the fast activating vacuolar cation channel

被引：28

作者：

Brüggemann, LI

Pottosin, II

Schönknecht, G

机构：

[1] Univ Wurzburg, D-97082 Wurzburg, Germany

[2] Univ Colima, Ctr Biomed, Colima 28047, Mexico

来源：

JOURNAL OF EXPERIMENTAL BOTANY | 1999年 / 50卷 / 335期

关键词：

Hordeum vulgare; patch-clamp; vacuolar membrane; cation channel; selectivity;

D O I：

10.1093/jexbot/50.335.873

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The FV channel dominates the ion conductance of the vacuolar membrane at physiological Ca2+ concentrations. Patch-clamp measurements on whole barley (Hordeum vulgare) mesophyll vacuoles and on excised tonoplast patches showed small differences in a selectivity sequence NH4+ > K+ greater than or equal to Rb+ greater than or equal to Cs+ > Na+ > Li-.(+) Less permeant cations decreased the open probability. The FV channel allows the uptake of small monovalent cations especially NH4+ into the vacuole.

引用

收藏

页码：873 / 876

页数：4

相关论文

共 20 条

[1] Control of ionic currents in guard cell vacuoles by cytosolic and luminal calcium [J].

Allen, GJ ;

Sanders, D .

PLANT JOURNAL, 1996, 10 (06) :1055-1069

[2] ELECTRICAL MEASUREMENTS ON ENDOMEMBRANES [J].

BERTL, A ;

BLUMWALD, E ;

CORONADO, R ;

EISENBERG, R ;

FINDLAY, G ;

GRADMANN, D ;

HILLE, B ;

KOHLER, K ;

KOLB, HA ;

MACROBBIE, E ;

MEISSNER, G ;

MILLER, C ;

NEHER, E ;

PALADE, P ;

PANTOJA, O ;

SANDERS, D ;

SCHROEDER, J ;

SLAYMAN, C ;

SPANSWICK, R ;

WALKER, A ;

WILLIAMS, A .

SCIENCE, 1992, 258 (5084) :873-874

[3] ELECTROCHEMICAL POTENTIAL GRADIENTS OF H+, K+, CA2+, AND CL- ACROSS THE TONOPLAST OF THE GREEN-ALGA EREMOSPHAERA-VIRIDIS [J].

BETHMANN, B ;

THALER, M ;

SIMONIS, W ;

SCHONKNECHT, G .

PLANT PHYSIOLOGY, 1995, 109 (04) :1317-1326

[4] Cytoplasmic polyamines block the fast-activating vacuolar cation channel [J].

Brüggemann, LI ;

Pottosin, II ;

Schönknecht, G .

PLANT JOURNAL, 1998, 16 (01) :101-105

[5] CYTOPLASMIC FREE CALCIUM IN RICCIA-FLUITANS L AND ZEA-MAYS-L - INTERACTION OF CA-2+ AND PH [J].

FELLE, H .

PLANTA, 1988, 176 (02) :248-255

[6] IMPROVED PATCH-CLAMP TECHNIQUES FOR HIGH-RESOLUTION CURRENT RECORDING FROM CELLS AND CELL-FREE MEMBRANE PATCHES [J].

HAMILL, OP ;

MARTY, A ;

NEHER, E ;

SAKMANN, B ;

SIGWORTH, FJ .

PFLUGERS ARCHIV-EUROPEAN JOURNAL OF PHYSIOLOGY, 1981, 391 (02) :85-100

[7] CYTOPLASMIC CALCIUM REGULATES VOLTAGE-DEPENDENT ION CHANNELS IN PLANT VACUOLES [J].

HEDRICH, R ;

NEHER, E .

NATURE, 1987, 329 (6142) :833-836

[8] Plant K+ channels: Similarity and diversity [J].

Hedrich, R ;

Dietrich, P .

BOTANICA ACTA, 1996, 109 (02) :94-101

[9]

Hille B., 1992, IONIC CHANNELS EXCIT

[10]

LEE RB, 1991, PLANTA, V183, P359, DOI 10.1007/BF00197734