Abstract

Tryptophane feedings in concentrations of from 0.1 Gm. to 0.6 Gm. per liter were found to stimulate nicotinic acid formation in tomato and Datura stramonium. However, no direct effect could be found on Datura alkaloid formation. In the latter case there was evidence that some relationship existed between nicotinic acid levels and those of alkaloid. As nicotinic acid decreased alkaloid increased and vice versa.

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