K+ CHANNELS IN THE PLASMA-MEMBRANE OF LILY POLLEN PROTOPLASTS

被引：27

作者：

OBERMEYER, G ^{[1
]}

KOLB, HA ^{[1
]}

机构：

[1] UNIV CONSTANCE,FAK BIOL,W-7750 CONSTANCE,GERMANY

来源：

BOTANICA ACTA | 1993年 / 106卷 / 01期

关键词：

K+ CHANNEL; PROTOPLAST; POLLEN GRAIN; LILIUM-LONGIFLORUM;

D O I：

10.1111/j.1438-8677.1993.tb00334.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Using the patch-clamp technique K+ channels could be observed in the plasma membrane of protoplasts from pollen grains of Lilium longiflorum. With depolarizing membrane potentials the open probability of the different K+ channels increased. Two K+ channel populations occurring occasionally had a single channel conductance of 120 pS and 42 pS, respectively. The most often observed K+ channel had a single channel conductance of 19 pS which showed an increase of channel activity with increasing free cytoplasmic Ca2+ concentration. This channel population might be involved in the pathway of endogenous transcellular K+ currents which are activated during pollen tube tip extension.

引用

页码：26 / 31

页数：6

共 23 条

[1] POTASSIUM-ION CHANNELS IN THE PLASMALEMMA [J].