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© 1972 Oxford University Press

RESEARCH-ARTICLE

The Inhibitory Effect of (2-Chloroethyl)-trimethylammonium Chloride on Chlorophyll and Protein Synthesis in Lettuce Cotyledons, and its Reversal by Potassium

J. S. KNYPL and KRYSTYNA M. CHYLINSKA

Department of Plant Physiology, Institute of Biochemistry and Physiology, University of Lodz Poland

Germinated seeds of Lactuca sativa (L.) were placed in Petri-dishes in (2-chloroethyl)-trimethyl-ammonium chloride (CCC; 0.005–0.05 M), KN03 (0.01 M), and KC1 (0.01 M) solutions, and incubated for 2 or 5 days under continuous light. CCC strikingly arrested chlorophyll accumulation, and retarded cotyledon growth relatively little. The retardant inhibited 14C-leucine incorporation into bulk proteins of the cotyledons. KN03 and KC1 promoted cotyledon growth and chlorophyll synthesis per cotyledon by about 150 per cent, and about doubled protein synthesis. Potassium salts completely reversed the inhibitory effects of CCC on chlorophyll and protein synthesis. It is suggested that the inhibition of greening by CCC is dependent on a prior inhibition of protein synthesis.


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