Ultraviolet radiation-induced changes in mycosporine-like amino acids and physiological variables in the red alga Lemanea fluviatilis

  1. Arróniz-Crespo, M. 2
  2. Sinha, R.P. 1
  3. Martínez-Abaigar, J. 2
  4. Núñez-Olivera, E. 2
  5. Häder, D.-P. 3
  1. 1 Banaras Hindu University
    info

    Banaras Hindu University

    Benarés, India

    ROR https://ror.org/04cdn2797

  2. 2 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  3. 3 University of Erlangen-Nuremberg
    info

    University of Erlangen-Nuremberg

    Erlangen, Alemania

    ROR https://ror.org/00f7hpc57

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Revista:
Journal of Freshwater Ecology

ISSN: 0270-5060

Año de publicación: 2005

Volumen: 20

Número: 4

Páginas: 677-687

Tipo: Artículo

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DOI: 10.1080/02705060.2005.9664791 SCOPUS: 2-s2.0-29744470564 WoS: WOS:000233141200009 GOOGLE SCHOLAR

Otras publicaciones en: Journal of Freshwater Ecology

Repositorio institucional: lock_openAcceso abierto Editor

Resumen

Samples of Lemanea fluviatilis were cultured in the laboratory under three different radiation regimes, which included the absence and presence of ultraviolet (UV) radiation. Photosynthetic pigment composition, photosynthetic activity, and mycosporine-like amino acids (MAAs) were analyzed after 16 and 64 h of exposure to the radiation. Two MAAs were identified as porphyra-334 and mycosporine-glycine. Mycosporine-glycine was specifically induced by UV-B radiation, but porphyra-334 was degraded by this radiation. The level of UV irradiance used in the induction experiment produced damages in the alga as revealed by reductions in photosynthetic activity and photosynthetic pigments (chlorophyll, phycocyanin, and total carotenoids). Our results indicate that the MAAs failed to fully protect the photosynthetic machinery against UV-B under the specific conditions used in this study.