AB 22:227-243 (2014)  -  DOI: https://doi.org/10.3354/ab00573

Short-term ecophysiological and biochemical responses of Cystoseira tamariscifolia and Ellisolandia elongata to environmental changes

P. S. M. Celis-Plá1,2,*, B. Martínez3, E. Quintano4, M. García-Sánchez5, A. Pedersen6, N. P. Navarro7, M. S. Copertino8, N. Mangaiyarkarasi9, R. Mariath10, F. L. Figueroa1, N. Korbee1

1Department of Ecology, Faculty of Science, University of Málaga, 29071 Málaga, Spain
2Laboratory of Botany, Faculty of Pharmacy, University of Barcelona, 08028 Barcelona, Spain
3Biology and Geology Department, Rey Juan Carlos University, 28933 Móstoles, Spain
4Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), PO Box 644, 48080 Bilbao, Spain
5Department of Ecology and Hydrology, Faculty of Biology, Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, 30100 Murcia, Spain
6 Norwegian Institute for Water Research, Department of Marine Biology, 0349 Oslo, Norway
7Faculty of Science, University of Magallanes, Casilla 113-D, Punta Arenas, Chile
8Institute of Oceanography, Federal University of Rio Grande-FURG, c.p. 474, cep 93206-900 Rio Grande (RS), Brazil
9Plant Biology and Biotechnology, CKN College Thiruvalluvar University, India
10Department of Botany, Institute of Biology, Federal University of Rio de Janeiro, Brazil
*Corresponding author:

ABSTRACT: Short-term ecophysiological and biochemical responses of Cystoseira tamariscifolia and Ellisolandia elongata to changes in solar irradiance and nutrient levels were analyzed in situ in oligotrophic coastal waters by transferring macroalgae collected at 0.5 and 2.0 m depth and exposing them to 2 irradiance levels (100 and 70% of surface irradiance) and nutrient conditions (nutrient-enriched and non-enriched). Both species were affected by changes in irradiance and nutrient levels. Few interactive effects between these 2 physical stressors were found, suggesting major additive effects on both species. C. tamariscifolia collected at 0.5 m and exposed to 70% irradiance had the highest maximal electron transport rate (ETRmax), saturated irradiance (EkETR) and chl a content and the lowest antioxidant activity. Under the same conditions, E. elongata had increased EkETR, antheraxanthin and β-carotene content. At 100% irradiance, C. tamariscifolia collected at 2.0 m had higher maximal quantum yield (Fv/Fm), photosynthetic efficiency (αETR), ETRmax, maximal non-photochemical quenching (NPQmax), saturation irradiance for NPQ (EkNPQ), and antheraxanthin and polyphenol content increased, whereas in E. elongata only αETR increased. In nutrient-enriched conditions, phenolic compounds, several carotenoids and N content increased in C. tamariscifolia at both depths. E. elongata from 2.0 m depth at 100% irradiance and nutrient-enriched conditions showed increased N content and total mycosporine-like amino acids (MAAs). Our results show rapid photophysiological responses of C. tamariscifolia to variations in in situ irradiance and nutrient conditions, suggesting efficient photoacclimation to environmental changes. In E. elongata, Fv/Fm and ETRmax did not change in the transplant experiment; in contrast, N content, pigment and MAAs (biochemical variables) changed. The responses of these macroalgae to nutrient enrichment indicate oligotrophic conditions at the study site and environmental stress.

KEY WORDS: Cystoseira tamariscifolia · Ellisolandia elongata · Antioxidant activity · Carotenoids · Irradiance · Nutrient · Polyphenols · Photoprotection

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Cite this article as: Celis-Plá PSM, Martínez B, Quintano E, García-Sánchez M and others (2014) Short-term ecophysiological and biochemical responses of Cystoseira tamariscifolia and Ellisolandia elongata to environmental changes. Aquat Biol 22:227-243. https://doi.org/10.3354/ab00573

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