Living in a coastal lagoon environment: Photosynthetic and biochemical mechanisms of key marine macroalgae

The physiological status of Cystoseira compressa, Padina pavonica and Palisada tenerrima was studied by in vivo chlorophyll fluorescence, pigment content, stoichiometry (C:N), accumulation of UV photoprotectors and antioxidant activity; comparing their photosynthetic response in a coastal lagoon (Mar Menor) and in Mediterranean coastal waters. In general, the specimens reached their highest ETRmax, in spring in the Lagoon, but in summer in the Mediterranean, coinciding with their maximum biomass peak. The species exhibited a dynamic photoinhibition. Except C compressa, they showed a lower decrease in F-v/F-m and higher recovery rates in the Mediterranean populations when exposed to high irradiance. The higher salinity and temperature of the lagoon could impair the photoprotection mechanisms. The acclimation to lagoon environments is species-specific and involves complex regulatory mechanisms. The results underline the importance of N in repair, avoidance, quenching and scavenging mechanisms. In general, Lagoon specimens showed higher pigment concentration. Although xanthophylls play important photo-protective and antioxidant roles, the observed trend is more likely to be explained by the higher temperatures reached in the lagoon compared to Mediterranean. Therefore the studied photosynthetic and biochemical mechanisms can be effective not only for high irradiance, but also for higher temperatures in a climate change scenario, but are highly dependent on nutrient availability.

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Garcia-Sanchez M. Korbee N. Maria Perez-Ruzafa I. Marcos C. Figueroa F.L. y Perez-Ruzafa A. Living in a coastal lagoon environment: Photosynthetic and biochemical mechanisms of key marine macroalgae. Elsevier B.V., 2014. https://doi.org/10.1016/j.marenvres.2014.07.012

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Tipo de recurso Artículo
Fecha de creación 05-11-2024
Fecha de última modificación 05-11-2024
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Identificador de los metadatos 104c82bb-12ea-5370-858e-645842a0ea4a
Idioma de los metadatos Español
Temáticas (NTI-RISP)
Categoría del conjunto de alto valor (HVD) Observación de la Tierra y medio ambiente
Categoría temática ISO 19115 biota
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Nombre del autor Garcia-Sanchez, M., Korbee, N., Maria Perez-Ruzafa, I., Marcos, C., Figueroa, F.L. y Perez-Ruzafa, A.
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Identificador alternativo DOI: 10.1016/j.marenvres.2014.07.012
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Email del autor martagarcia@um.es
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