Alleviation effects of Ce3+on inhibition of photochemical activity caused by linolenic acid in spinach chloroplast

Linolenic acid has great effects on the structure and function of chloroplast. The function of Ce3+ on the improvement of chloroplast photoreduction activity and oxygen evolution damaged by linolenic acid in spinach by in vitro investigation was studied. Results showed that adding Ce3+ to the linolenic acid treated chloroplast could greatly decrease the reduction linolenic acid exerted on the whole chain electron transport rate and the photoreduction activity of photosystem II (PSII) and photosystem I (PSI) as well as the oxygen evolution rate of chloroplast. It indicated that Ce3+ had the ability to relieve the inhibition of the photochemical reaction of chloroplast caused by linolenic acid to some extent.