甘藷の葉に与えたP^<32>の移動蓄積におよぼす温度の影響

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This paper gives the result of research made to find the influence of temperature on the translocation of foliar-applied P^<32> of sweet potatu in 1958. The absorption of P^<32> from one leaf of sweet potato increased progressively with succesively higher temperature when the plants were held in darkness over night (15hr) at soil temperatures of 10°, 20°, 30°, and 40℃, while the optimal air temperature for P^<32> absorption was 30℃ when plants were held at 10°, 20°, 30°, and 40℃ of air temperature. P^<32> was translocated mainly into the root and lower stem below the node of the P^<32> treated leaf. The effect of soil temperature on the P^<32> accumulation in root was generally stronger than that of air temperature, espesially the accumulation in root was greater at the soil temperature of 30° and 40℃ which were higher than the temperature of leaves and stem. When roots of a plant were divided into two groups and each of halves was exposed to different temperature in darkness for 20 hours, the translocation and accumulation of P^<32> were better at 30℃ than 40℃, better at 30℃ than 20℃, and 20℃ than 10℃ root temperature.
1961-01-20