産地特定のための水耕野菜への元素導入によるマーキングシステムの開発(第1報)

書誌事項

タイトル別名
  • Development of a Marking System by Introducing Mineral Elements into Vegetables in Hydroponics to Certify Their Source (Part 1)
  • サンチ トクテイ ノ タメ ノ スイコウ ヤサイ エ ノ ゲンソ ドウニュウ ニ ヨル マーキング システム ノ カイハツ ダイ1ポウ タンイツ ゲンソ ヨウエキ ノ シンセキ ショリ ト レタス カショクブ ノ ムキ ゲンソ ノウド ト ノ カンケイ
  • -The Effect of Soaking the Root in Nutrient Solution Containing a Single Marker Element on the Concentration of that Element in Lettuce Tops-
  • -単一元素溶液の浸漬処理とレタス可食部の無機元素濃度との関係-

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Various mineral elements were incorporated into lettuce grown in hydroponics to find suitable mineral elements for developing a marking system to certify the provenance of vegetables. Seven mineral elements (Ba, Sr, Mo, Co, Cu, Ni and V) were selected as candidate markers, since the natural abundance of these elements in lettuce were low and they seem to have comparatively low toxicity to human and vegetables. Two varieties of lettuce (Lactuca sativa L., cv: Red-fire and Rakuten) were cultivated in nutrient solution containing each of these elements at various concentrations. Lettuce grown under all treatments with Ba, Sr and Mo and under treatment with Cu at 0.25 and 0.50 mg l-1 and with Ni at a concentration range of 0.05-0.50 mg l-1 showed favorable growth similar to the control, whereas under treatment with Co, Cu and Ni at 5.00 mg l-1 and with Cu at 10.00 mg l-1 , plants showed unfavorable growth. Vanadium was hardly absorbed by lettuce. Concentrations of Ba, Sr, Co, Mo, Cu and Ni in tops of lettuce were increased in proportion to increase in the actual concentration of each element in nutrient solution.<BR>In addition, amounts of elements contained in 470 g of treated lettuce (amount recommended by the Ministry of Health and Welfare of Japan for daily consumption by adult) in several treatments were lower than the Acceptable Daily Intake (ADI) or Tolerated Daily Intake (TDI) and were obviously higher than their natural abundances. These results suggest that Ba, Sr, Mo, Co, Cu, and Ni could be used as marker elements to certify the provenance of lettuce grown in hydroponics when lettuce is cultivated using a nutrient solution within a suitable concentration range.

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