The Inhibitory Effect of (2-Chloroethyl)-trimethylammonium Chloride on Chlorophyll and Protein Synthesis in Lettuce Cotyledons, and its Reversal by Potassium |
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Authors: | KNYPL J S; CHYLINSKA KRYSTYNA M |
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Abstract: | Germinated seeds of Lactuca sativa (L.) were placed in Petri-dishesin (2-chloroethyl)-trimethyl-ammonium chloride (CCC; 0.0050.05M), KN03 (0.01 M), and KC1 (0.01 M) solutions, and incubatedfor 2 or 5 days under continuous light. CCC strikingly arrestedchlorophyll accumulation, and retarded cotyledon growth relativelylittle. The retardant inhibited 14C-leucine incorporation intobulk proteins of the cotyledons. KN03 and KC1 promoted cotyledongrowth and chlorophyll synthesis per cotyledon by about 150per cent, and about doubled protein synthesis. Potassium saltscompletely reversed the inhibitory effects of CCC on chlorophylland protein synthesis. It is suggested that the inhibition ofgreening by CCC is dependent on a prior inhibition of proteinsynthesis. |
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