リボフラビン分泌から推定したホウレンソウの鉄欠乏および鉄欠乏を誘発するマンガン過剰のクリティカルレベル

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Spinach was grown in low iron concentrations (1/2, 1/4, 1/8, 1/16, 1/32, 0 times the control level) or a control (3 mg L^<-1>) and in high manganese concentrations (5, 10, 100, 200, 400, times the control level) or a control (0.5 mg L^<-1>). The amount of riboflavin secreted to the culture solution from spinach root was measured. The concentration of riboflavin io roots and the amount in the culture solution rose as the iron concentration decreased in the culture solution. Also, the amount of riboflavin secreted from spinach root to the culture solution increased rcmarkably with the iron concentrations below 1/8 times that of the control level. In this case, a highly negative correlation was admitted between the iron concentration of leaves and the amount of riboflavin secreted to the culture solution. So it was guessed that the critical value of iron deficiency as a concentration of iron in leaves was 72 mg kg^<-1>. On the other hand, the amount of riboflavin secreted to the culture solution increased with the excessive administration of manganese. It was suggested that the excessive manganese led to the iron deficiency. Also, a highly positive correlation was observed between the manganese concentration of leaves and the amount of riboflavin secreted to the culture solution. So it was guessed the critical value of manganese excess with iron deficiency as a concentration of manganese in leaves was 108 mg kg^<-1>.
社団法人日本土壌肥料学会の論文
1998-04-05

リボフラビン分泌から推定したホウレンソウの鉄欠乏および鉄欠乏を誘発するマンガン過剰のクリティカルレベル

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