On the Occurrence of Growth Inhibiting Substances in Rye

No difference in growth inhibition could be detected from the wheat resorcinols found by Wenckert et al. But the effect of synthetic 5-n-pentadecyl resorcinol was only 50-60 % of that of the grain resorcinols, however. This could not be due to alkenyl resorcinols in wheat and rye, because hydrogenation of the grain resorcinols did not alter the growth inhibition.