Studies in Plant Metabolism. VI. Effect of 2,4-D on the Metabolism of Aspartic Acid and Glutamic Acid in the Bean Plant.

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Abstract
Photo-synthesis in bean plants (Phaseolus vulgaris var. Black Valentine) was markedly reduced by 50 ugm of 2,4-D treatment. The rate of reduction remained essentially constant over the 7-day period after treatment. The incorporation of C14 into aspartic and glutamic acids was 3 to 4 times greater in the treated plants than in the control plants. The most pronounced effect was observed in plants harvested on the third day. Total amounts of aspartic and glutamic acid decreased in the treated plants, especially in the plants harvested on the seventh day after treatment. A possible explanation for the increased incorporation of Cl4 and more rapid loss of aspartic and glutamic acids is discussed.