Diurnal K^+ and Anion Transport in Phaseolus Pulvinus

概要

論文の詳細を見る
Diurnal movement of Phaseolus leaf is caused by defotmation of the laminar pulvinus located at the joint of the leaf blade and the petiole. The plants were cultured in solutions with various ion compositions, and changes of K^+, Na^+, Ca^<2+>, Mg^<2+>, Cl^-, NO_3^- and P_i concentrations both in the upper and lower parts of the laminar pulvinus were measured. Culture in 10 mM KCl solution caused an increase in K^+ and Cl^-concentrations both in the upper and lower parts without any significant change in the concentration of NO_3^-; culture in 10 mM KNO_3 solution caused an increase in K^+ and NO_3^- concentration without any significant change in the concentration of Cl^-; and culture in 10 mM KH_2PO_4 solution caused an increase in K^+ and Pi concentrations without any significant change in the concentrations of NO_3^- and Cl^-. K^+ moved from the upper to lower parts or from the lower to upper parts diurnally in all plants cultured in any solution mentioned above. The main inorganic anion that accompanied this K^+ movement was Cl^- in KCl solution, and NO_3^- in KNO_3 solution. When the seedlings were cultured in distilled water or in KH_2PO_4 solution, neither Cl^-, NO_3^- nor Pi accompanied this K^+ movement. In these cases, mainly H^+ and/or organic anions are supposed to move in exchange for and/or in combination with K^+ movement.
日本植物生理学会の論文