دورية أكاديمية
UV-absorbing mycosporine-like amino acids in the eyes of temperate marine and freshwater fish species
العنوان: | UV-absorbing mycosporine-like amino acids in the eyes of temperate marine and freshwater fish species |
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المؤلفون: | Jane Bonin, Fabian J. Hammerle, Markus Ganzera, Uwe Krumme, Ulf Karsten |
المصدر: | Frontiers in Marine Science, Vol 11 (2024) |
بيانات النشر: | Frontiers Media S.A., 2024. |
سنة النشر: | 2024 |
المجموعة: | LCC:Science LCC:General. Including nature conservation, geographical distribution |
مصطلحات موضوعية: | fish eyes, freshwater, MAAs, marine environment, ultraviolet radiation, UV-sunscreens, Science, General. Including nature conservation, geographical distribution, QH1-199.5 |
الوصف: | Ultraviolet radiation (UVR) is the photochemically most reactive waveband of incident solar irradiation. Despite high absorption in aquatic environments, UVR causes numerous biochemical, genetic, and cytotoxic effects in aquatic organisms. To counteract UVR stress, many of those species are able to synthesize, accumulate, or acquire UV-sunscreen compounds for photoprotection from their diet. The most abundant UV sunscreens in marine and freshwater organisms are mycosporine-like amino acids (MAAs), which exhibit high molar extinction coefficients in the UVR range along with a strong photo- and heat stability. In this study, we investigated the qualitative and quantitative MAA distribution patterns in the eyes of 39 fish species, mainly from the temperate northern hemisphere (Baltic Sea, Northern Atlantic), using state-of-the-art analytical methods. The fish eyes of the most investigated species (33 taxa) contained MAAs, between one and seven different compounds. The MAAs palythine, asterina-330, palythene, and usujirene were present (as previously reported), and three new compounds, aplysiapalythine A, porphyra-334, and shinorine, were identified. Total MAA concentrations covered a wide range from trace amounts to > 4.2 mg g−1 dry weight, thereby providing the first quantitative data on MAAs in fish eyes. The highest MAA contents were measured in Sprattus sprattus, which are comparable to those of intertidal red seaweeds. The trophic transfer of MAAs from primary producers via zooplankton to the fish is discussed, along with the localization in the fish eye as well as possible additional functions. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 2296-7745 |
Relation: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1426861/full; https://doaj.org/toc/2296-7745 |
DOI: | 10.3389/fmars.2024.1426861 |
URL الوصول: | https://doaj.org/article/389edbe7ba60413aa86924eefb58ceb1 |
رقم الأكسشن: | edsdoj.389edbe7ba60413aa86924eefb58ceb1 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 22967745 |
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DOI: | 10.3389/fmars.2024.1426861 |