Effects of Epibrassinolide on Sugar Transport and Allocation to the Epicotyl in Cucumber Seedlings

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概要

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• Epibrassinolide (EBR, 24-epibrassinolide), one of the brassinosteroids (BRs), promotes elongation and sugar accumulation in the epicotyl of cucumber (Cucumis sativus L.) seedlings. In the seedlings with the primary leaf removed, such effects of EBR were not observed. On the other hand, in the seedlings with cotyledons removed, EBR promoted epicotyl elongation as in intact seedlings, and also promoted sugar accumulation in the epicotyl although the promotion was weaker than in intact seedlings. To examine the sugar transport to the epicotyl from the primary leaf, cotyledon, and hypocotyl, we applied [^<14>C]-labeled sucrose to each organ, and examined the distribution of radioactivity 18 hr later. Allocation to the epicotyl of [^<14>C]-sucrose applied to the primary leaf was enhanced by EBR, but that of [^<14>C]-sucrose applied to the cotyledon or hypocotyl was not. This suggests that EBR specifically promotes the transport of sugar from the primary leaf to the epicotyl, and enhances sugar accumulation in the epicotyl.

• 日本作物学会の論文

著者

• Nakajima Naoko

  National Institute Of Agro-environmental Sciences

• Toyama Susumu

  Department of Human Welfare, Faculty of Humanities, Seigakuin University

• Toyama Susumu

  Department Of Human Welfare Faculty Of Humanities Seigakuin University

関連論文

• Effects of Epibrassinolide on Sugar Transport and Allocation to the Epicotyl in Cucumber Seedlings
• Electron microscopic studies of the respiratory system of the newt
• Metabolism of ^C-Labeled Epibrassinolide in Intact Seedlings of Cucumber and Wheat
• The Uptake and the Transport of ^C-Labeled Epibrassinolide in Intact Seedlings of Cucumber and Wheat

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