Studies on the effect of certain enzymic poisons on the metabolism of storage organs IV. Respiration and nitrogen assimilation by radish root slices in relation to feeding with KCN

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概要

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• At low and high concentrations, respectively, KCN stimulated and inhibited the CO_2 output of radish root slices. Analysis of tissue slices showed that CO_2 production is nearly accounted for by the loss in carbohydrates. After 48 hr, the content of protein-N was slightly changed in all the cyanide-treated tissues; whereas, that of soluble-N decreased markedly at high cyanide concentrations and hardly changed at low concentrations. Leakage of soluble-N occurred at high concentrations of cyanide. The nitrogen compounds taken up were incorporated into the nitrogen pool of radish slices. KCN retarded uptake of nitrogen compounds, inhibited their utilization and led to excessive leakage of soluble-N from the tissues into the media. Increased CO_2 output of slices in nitrogen media was largely accounted for by the loss in carbohydrates from the tissues. High concentrations of cyanide are thought to inhibit CO_2 output through inhibition of the oxidase system and accompanying phosphorylations. The present results with low concentrations further substantiate the uncoupling theory as a main factor involved in respiration.

• 日本植物生理学会の論文

著者

• Younis M.e.

  Department Of Botany Faculty Of Science University Of Cairo:(present)department Of Botany Faculty Of

• Younis A.e.

  Department Of Botany Faculty Of Science University Of Cairo

• Younis M.e.

  Department Of Botany Faculty Science University Of Cairo Giza Egypt U. A.

• Younis A.e.

  Department Of Botany Faculty Science University Of Cairo Giza Egypt U. A.

• MONTASIR R.A.

  Department of Botany, Faculty Science, University of Cairo, Giza, Egypt, U. A.

• Montasir R.a.

  Department Of Botany Faculty Science University Of Cairo Giza Egypt U. A.

関連論文

• Studies on the effect of certain enzymic poisons on the metabolism of storage organs III. Uptake and utilization of sucrose by radish root slices in presence of iodoacetate
• Studies on the effect of certain enzymic poisons on the metabolism of storage organs II. Differential effects of iodoacetate on the respiratory metabolism and permeability barriers of radish root slices
• Studies on the effect of certain enzymic poisons on the metabolism of storage organs IV. Respiration and nitrogen assimilation by radish root slices in relation to feeding with KCN

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