Effect of Ultraviolet Radiation on Acetylcholinesterase Activity in Freshwater Copepods
MARÍA SOL SOUZA; ESTEBAN BALSEIRO; CECILIA LASPOUMADERES; BEATRIZ MODENUTTI
PHOTOCHEMISTRY AND PHOTOBIOLOGY
WILEY-BLACKWELL PUBLISHING, INC
Lugar: Londres; Año: 2010 vol. 86 p. 367 - 367
We analyzed the effects of UV radiation (UVR) effects on acetylcholinesterase (AChE) activity in two calanoid copepods, Boeckella gibbosa and Parabroteas sarsi that inhabit Patagonian shallow lakes. We studied the effect of experimental UVR (UV-B and UV-A) exposure on AChE activity in relation to basal antioxidant capacities of both copepods. Our experiments showed that UVR can effectively depress AChE activity, although with differences between species. In both copepods AChE was affected by UV-B, whereas UV-A only affected AChE in B. gibbosa. Both copepods also differed in body elemental composition (C:N:P), photoprotecting compound content (carotenoids and mycosporine-like amino acids) and enzymatic antioxidant capacity (glutathione S-transferase [GST]). Our results suggest that when exposed to UVR, AChE activity would depend more on the antioxidant capacity (GST) and P availability for enzyme synthesis than on the photoprotective compounds.