STS溶液のAgNO3とNa2S2O3・5H2Oの混合比率がカーネーション切り花の銀の吸収と分布および品質保持期間に及ぼす影響

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タイトル別名
  • Effect of Silver Thiosulfate Solution(STS) Having Different Ratios of AgNO3 and Na2S2O35H2O on Ag Absorption and Distribution, and Vase Life of Cut Carnations.
  • STS ヨウエキ ノ AgNO3 ト Na2S2O3 5H2O ノ コンゴウ

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抄録

Cut carnation flower stems were immersed in solutions of silver thiosulfate (STS) having Ag to thiosulfate ratios of 1 : 1, 1 : 2, 1 : 4, 1 : 8, 1 : 16 and 1 : 32. The solutions were prepared by mixing AgNO3 and Na2S2O3•5H2O to give a final Ag+ concentration of 1 mM or 0.2 mM. Ag chelate in the solutions with high ratios of thiosulfate to Ag, i. e. 1 : 8 to 1 : 32, was quite stable, whereas at ratios of 1 : 1 to 1 : 4, it was not.<BR>1. Ag was detected in the flower head by atomic absorption analysis after cut carnations were treated with the solutions at ratios from 1 : 2 to 1 : 32. It was not detectable in the flower head when treated with AgNO3 solution alone (1 : 0). All or most of Ag was located in the lower stem when stems were treated with solutions having a ratio of 1 : 0 or 1 : 1.<BR>2. The amount of Ag translocated to the carnation flower head was closely associated with vase life. Treatment of cut flowers with solutions at the ratios of 1 : 4 to 1 : 32 doubled the vase life compared with flowers treated with deionized water. The solutions with ratios of 1 : 4 to 1 : 32 were equally effective in prolonging vase life. Treatment with the solutions with ratios of 1 : 0 to 1 : 2 extended vase life only slightly.<BR>3. Injury to upper leaves increased proportionally with the increase in Ag accumulation and with the increasing ratios of thiosulfate to Ag. Leaf injury symptoms appeared when stems were immersed in 1 mM Ag solutions.<BR>Thus, to extend the vase life of carnations we recommend the use of a 1 : 8 molar ratio of AgNO3 to Na2S2O3•5H2O in the STS solution.

収録刊行物

  • 園芸学会雑誌

    園芸学会雑誌 64 (1), 185-191, 1995

    一般社団法人 園芸学会

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