Cellular Mycosporine-like amino acids protect photosystem II of the Dinoflagellate Scrippsiella sweeneyae from ultraviolet radiation damage

Publication date: September 2017 Source:Journal of Photochemistry and Photobiology B: Biology, Volume 174 Author(s): Hitomi Taira, Satoru Taguchi Photo-damage to photosystem II (PSII) from ultraviolet radiation (UVR) was determined using chlorophyll fluorescence in relation to sunscreen factors on the dinoflagellate Scrippsiella sweeneyae based on the cellular mycosporine-like amino acid contents (C MAAs, cell) and cell diameter (=light path, d). Three different C MAAs, cell were prepared by acclimating cells to three levels (30.8, 15.2, and 7.7Wm−2) of photosynthetically active radiation (PAR). PAR-acclimated cells were exposed to PAR (0.64Wm−2)+UVR (3.94W m−2 =2.51Wm−2 UVB+1.43Wm−2 UVA) for 12min. High PAR (HL) and medium PAR (NDF1) treatments acclimated cells to induce shinor...

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