Abstract
Only recently have studies been conducted concerning the effects of mineral elements upon the vitamin content of plants. These studies have dealt largely with carotene and ascorbic acid content. The effect of mineral elements upon the biosynthesis of the B-complex vitamins has received very little attention. Watson and Noggle (11) studied the effects of mineral deficiencies upon riboflavin synthesis in immature oat plants and found a high positive correlation between nitrogen and riboflavin concentrations in the leaves. Mc Coy et al. (7) also using immature oat plants, studied the effects of sub-optimum concentrations of mineral elements upon the synthesis of niacin, and demonstrated that there was a decreasing concentration of niacin with decreasing concentrations of nitrogen supplied to the plants. This paper is a report of a study of the effect of varying concentrations of nitrate nitrogen in the nutrient solution on the synthesis of biotin and pantothenic acid in immature oat plants.
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