Fig. 3.

Incorporation of thymidine into the DNA of C. arabica protoplasts. Protoplasts were incubated with (closed circle) or without (open circle) 100 μM AlCl₃ for different time periods (0, 5, 10, 20, or 30 min). [³H]-thymidine incorporation was determined as outlined in the “Methods” section. Results are the mean of three experiments ±SE and are expressed as a percentage of the [³H]-thymidine incorporated in the absence of AlCl₃, which was considered to be 100 %