Rhythm in potassium uptake by a duckweed, Lemna gibba G3

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概要

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• The potassium uptake activity of the "flow-medium culture" of a long-day duck-weed, Lemna gibba G_3, followed a circadian rhythm which persisted for more than 5 days under continuous light. The period of the rhythm was about 25 hr under 3000 lux at 26℃ and was slightly over-compensated against temperature, Q_<10> being a little less than 1.0. The amplitude of the rhythm was dependent on light intensity, and there was no potassium uptake in the dark. Magnesium uptake was affected by the potassium movement and showed circadian rhythmicity with a small amplitude under conditions where the potassium uptake was already saturated. Calcium uptake did not show any obvious rhythm. In contrast to L. gibba, a short-day duckweed L. perpusilla 6746 displayed circadian rhythm of potassium uptake only in the dark and not in the light. This rhythm did not persist beyond the second cycle.

• 日本植物生理学会の論文

著者

• Tsudzuki Takahiko

  Biological Institute, Faculty of Science, Nagoya University

• Kondo Takao

  Biological Institute Faculty Of Science Nagoya University

• Tsudzuki Takahiko

  Biological Institute Faculty Of Science Nagoya University

関連論文

• Further studies on potassium uptake rhythm in the long-day duckweed Lemna gibba G3 with special reference to vegetative growth
• Phase progress under low temperature treatment of the potassium uptake rhythm in a duckweed, Lemna gibba G3
• Evidence against involvement of circadian floral rhythm in the critical daylength measurement in Lemna gibba G3
• Removal by cyclic AMP of the inhibition of duckweed flowering due to ammonium and water-treatment
• Resemblance of growth substances to metal chelators with respect to their actions on duckweed growth
• Rhythm in potassium uptake by a duckweed, Lemna gibba G3
• Diurnal change in leakage of electrolytes from a long-day duckweed, Lemna gibba G3, under osmotic stress induced by water treatment

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