Seasonal changes in stress metabolites of native and introduced red algae in New Zealand

摘要: Intertidal algae have to cope with diurnally and seasonally fluctuating environmental factors such as salinity, temperature, dehydration, light. In New Zealand, solar radiation, including the ultraviolet wavelengths, is also an important stress factor for algae. Therefore, two native (Bostrychia arbuscula W.H.Harvey [Ceramiales], Champia novae-zelandiae (J.D.Hooker & Harvey) Harvey [Rhodymeniales]) one introduced red algal taxon (Schizymenia spp. J. Agardh [Nemastomatales]) were investigated over 12 months in terms of metabolites which contribute radiation (UVR) salinity tolerance. Mycosporine-like amino acids (MAAs), act sunscreens, organic osmolytes qualitatively quantitatively analyzed. Porphyra-334, shinorine, palythine most dominant MAAs yet distributed differently among species. B. showed a correlation between photosynthetically active (PAR)/UVR slightly higher MAA concentrations summer. contrast, C. displayed lowest level summer, no was found values radiation. Schizymenia spp., highest amounts months, PAR/UV visible. While digeneaside sorbitol arbuscula, floridoside occurred Only exhibited osmolyte contents low highly variable course seasons. Our data indicate that both species are well acclimated intertidal zone. For more narrow tolerance can be assumed, while high may explain its establishment Zealand.