Diurnal Rhythm and Characteristics of Photosynthesis and Respiration in the Leaf and Root of a Phalaenopsis Plant

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概要

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• A hybrid Phalaenopsis plant was grown hydroponically on a nutrient solution of Hyponex in the greenhouse. Typical daily patterns of CO_2 fixation, production of malic acid and citric acid and pH of the leaf and root were determined. The rate of primary fixation of CO_2 in the leaf increased markedly in the evening, remained high until well into the afternoon, then decreased sharply. The pattern of production of organic acids resulted from the fact that the rate of uptake of CO_2 gas was highest at night and fell during the day. A high correlation between pH value and level of malic acid in the leaves was observed, and an exponential relationship appeared to exist between these parameters. These rhythmic sequences were not observed in the root. The results suggest that metabolism in the leaf had characteristics of CAM (Crassulacean Acid Metabolism), while the root did not.

• 日本植物生理学会の論文

著者

• ENDO Muneo

  Chiba-Ken Agricultural Experiment Station

• Ikusima I

  Chiba Univ. Chiba Jpn

• Ikusima Isao

  Institute of Marine Ecosystems, Faculty of Sciences Chiba University

• Endo M

  Chiba Prefectural Agricultural Experimental Station Chiba Jpn

• Endo Muneo

  Chiba Prefectural Agricultural Experimental Station

関連論文

• EFFECTS OF THE INTERCEPTION OF NEAR ULTRAVIOLET RADIATION ON NITRIFIER ACTIVITY AND NITRIFICATION PROCESS IN A FERTILIZED ANDOSOL UNDER FIELD CONDITIONS
• Diurnal Rhythm and Characteristics of Photosynthesis and Respiration in the Leaf and Root of a Phalaenopsis Plant
• Changes in Concentrations of Sugars and Organic Acids in the Long-Lasting Flower Clusters of Phalaenopsis

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