Effect of Root Zone Temperature on the Mineral Composition of Xylem Sap and Plasma Membrane K^+ -Mg^<++> -ATPase Activity of Grafted-Cucumber and-Figleaf Gourd Root Systems : ENVIRONMENTAL AND STRESS RESPONSES : MEMBRANES AND BIOENERGETICS

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概要

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• Cucumber (Cucumis sativus L.) seedlings were grafted onto cucumber- (CG) or figleaf gourd- (FG, Cucurbita fiafolia Bouche) seedlings in order to determine the effect of solution temperature (12, 22, and 32℃) on the mineral composition of xylem sap and the plasma membrane K^+-Mg^<++>-ATPase activities of the roots. Low solution temperature (12℃) lowered the concentration of NO and H_2PO^-_4 in xylem sap of CG plants but not of FG plants. Concentrations of K^+, Ca^<++> and Mg^<++> in xylem sap were less affected than anions by solution temperature. The plasma membrane of FG plants grown in 12℃ solution temperature showed the highest K^+ Mg^<++>-ATPase activity at all ATP concentrations up to 3 mM and at low reaction temperature up to 12℃, indicating resistance of figleaf gourd to low root temperature.

• 日本植物生理学会の論文

著者

• AHN Sung

  Department of Dermatology, Yonsei University Wonju College of Medicine

• Choi K

  Chonnam Provincial R.d.a. Chonnam Kor

• Ahn Sung

  Department Of Dermatology And Institute Of Basic Medical Science Yonsei University Wonju College Of

• Ahn Sung

  Department Of Horticulture College Of Agriculture Chonnam National University

• CHOI Kyong

  Chonnam Provincial Rural Development Administration, Naju-Gun

• CHUNC Gap

  Department of Horticulture, College of Agriculture, Chonnam National University

• Chunc Gap

  Department Of Horticulture College Of Agriculture Chonnam National University

• Ahn Sung

  Department of Advanced Materials Engineering, Korea Polytechnic University, Shihung 429-793, Korea

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