Ca^<2+> Effects on K^+ Fluxes in Arabidopsis Seedlings Exposed to Al^<3+>
スポンサーリンク
概要
- 論文の詳細を見る
Potassium transport was investigated in the root elongation zone of Arabidopsis seedlings during the first minutes of Al^<3+> exposure, using the non-invasive MIFE microelectrode technique. To prevent pH changes during Al^<3+> application, and to separate aluminium from acidic stress, plants were pre-treated with 5mM homoPIPES before addition of AlCl_3 (pH 4.2). The 30-min treatment with 50 or 500μM AlCl_3 led to a significant increase in K^+ efflux in solutions containing 100μM CaCl_2. This efflux was suppressed by high concentrations of Ca^<2+> (10mM) in the bathing solution. Our results suggest that elevated external Ca^<2+> activities can sustain K^+ influx in the root elongation zone during Al^<3+> exposure either by maintaining [Ca^<2+>]_<cyt> or by affecting Al^<3+> uptake across the plasma membrane.
- 一般社団法人日本土壌肥料学会の論文
著者
-
Newman Ian
University Of Tasmania
-
Babourina Olga
University of Western Australia
-
Voltchanskii Konstantin
University of Western Australia
-
Rengel Zed
University of Western Australia