高等植物の光合成および呼吸速度測定の ための簡単な検容法 (2)

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  • A Simple Volumetric Method for Measuring Photosynthesis and Respiration Rates in Higher Plants (2)
  • コウトウ ショクブツ ノ コウゴウセイ オヨビ コキュウ ソクド ソクテイ ノ タメ ノ カンタン ナ ケンヨウホウ 2

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In a previous paper the author presented a new simple volumeter for measurement of photosynthesis and respiration rates with the use of a low power microscope. This was improved to permit the measurement without the microscope. Five to seven volumeters, one being thermobarometer, were used simultaneously. Photosynthesis rate is measurable within about 10minutes, and respiration rate within about 30minutes. This apparatus is useful in measurements not only indoors but also outdoors. Presented in this report are the data obtained from measurements made indoors and outdoors on 32 species of plants; that is 1 aquatic, 3 marine and 28 land plants. The apparent photosynthesis rates are generally larger than those previously observed under near-natural conditions. This may be due to the high concentration of CO2 (2.7%), high temperature (30°), and also the use of cut leaf strips permitting large gas exchange through the cut surface. In a leaf of Ficus elastica the photosynthesis rate was somewhat higher at the more apical and near-margin parts of the leaf than at the basal and near-midrib ones, respectively. No such difference was seen on the respiration rate.

収録刊行物

  • 植物学雑誌

    植物学雑誌 82 (972), 244-252, 1969

    公益社団法人 日本植物学会

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