Energy supply for potassium uptake rhythm in a duckweed, Lemna gibba G3

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概要

• 論文の詳細を見る

• The energy relationships of the potassium uptake rhythm in a flow-medium culture of a duckweed, Lemna gibba G3, were investigated. Respiratory inhibitors or uncouplers (NaCN, 2,4-dinitrophenol and carbonyl-cyanide m-chlorophenylhydrazon) reduced the mesor or the average rate of potassium uptake, without remarkably decreasing the amplitude of the rhythm. NaN_3, however, preferably surpressed the amplitude at a concentration as low as 10^<-6> M. Both dichloro-phenyldimethylurea and the removal of CO_2 gradually decreased the average rate of the uptake, although the rhythmicity itself was not eliminated completely in the absence of CO_2. In N_2, the average rate of uptake was reduced to zero, but rhythm with a small amplitude survived. These observations suggested that respired photosynthates provide energy for sustaining the average of potassium uptake and that some light dependent processes control the amplitude of the rhythm. Exogenous sugar could make the potassium uptake rhythm appear for a relatively short time in the dark.

• 日本植物生理学会の論文

著者

• KONDO Takao

  National Institute for Basic Biology

• Tsudzuki Takahiko

  Aichi Gakuin University

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• Energy supply for potassium uptake rhythm in a duckweed, Lemna gibba G3
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