The inhibition by high concentrations of (2-chloroethyl)-trimethylammonium chloride (CCC) of chlorophyll and protein synthesis in excised barley leaf sections.

CCC at concentrations of 10(-3) M and higher inhibits chlorophyll synthesis and (3)H-leucine incorporation into a protein fraction by barley leaf sections. Neither of these effects is reversed by exogenous GA3. No effect of CCC was observed on oxygen uptake by the leaf sections. The results indicate that high concentrations of CCC may act through an inhibition of protein synthesis, rather than through a direct effect on endogenous gibberellin production.