期刊
CELLULAR PHYSIOLOGY AND BIOCHEMISTRY
卷 26, 期 6, 页码 975-982出版社
KARGER
DOI: 10.1159/000324010
关键词
Mitochondria; Patch clamp; ATP-sensitive cation channel; Plant
资金
- MIUR
- Progetto di Ateneo
- Progetto di Ricerca Nazionale (PRIN)
Indirect evidence points to the presence of K+ channels in plant mitochondria. In the present study, we report the results of the first patch clamp experiments on plant mitochondria. Single-channel recordings in 150 mM potassium gluconate have allowed the biophysical characterization of a channel with a conductance of 150 pS in the inner mitochondrial membrane of mitoplasts obtained from wheat (Triticum durum Desf.). The channel displayed sharp voltage sensitivity, permeability to potassium and cation selectivity. ATP in the mM concentration range completely abolished the activity. We discuss the possible molecular identity of the channel and its possible role in the defence mechanisms against oxidative stress in plants. Copyright (C) 2010 S. Karger AG, Basel
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