葉から吸収されたリン酸の形態の変化 : 葉面施肥にかんする研究(第3報)

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In this paper the phosphorus turnover in plant leaves are described. I EXPERIMENT I., several leaves oftomato plant were applied with M/10 KH_2PO_4 containing radiophosphorus in the strength of 0.8 micro curie/ml. and glucose in 5%. Five days after, upper leaves and stalk which had not been applied were sampled, and each 5 g of them was fractionated by the methods described in Fig. 1. Radioactivity of each fraction was measured by GEIGER-MULLER counter. The results are shown in Table 1 and 2. In Exp. II., 5 g of tomato leaves was vacuum infiltrated with 0.2 M KH_2PO_4 containing P^<32>, settled in room at ca 20℃. After 2 hours, the tissue was dealt with the same way as Exp. I. The radioactivity of each fraction is shown in Table 3. Reliability or adequacy of the methods employed in the fractionation of phosphorus compounds were examined as shown in Table 4 and 5. Conclusions obtained are as follow : 1) From inorganic phosphate absorbed through leaf-surface, considerable amount of sugar-phosphates and nucleic acids are synthesized by 5 days In the same period of time lipoid and acid soluble-barium unsoluble-acid labile phosphate are confirmed to be fairly synthesized in plant. 2) In case when excised leaves are infiltrated with inorganic phosphates, ca. 10% of the absorbed phosphate is transferred to organic combinations in 2 hours, and the larger parts of it consist of acid-soluble barium-soluble fraction. In this case, the formation of lipoid cannot be approved.
社団法人日本土壌肥料学会の論文
1953-07-20

葉から吸収されたリン酸の形態の変化 : 葉面施肥にかんする研究(第3報)

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