Adjustment of pigment composition in Desmarestia (Desmarestiaceae) species along a sub-Antarctic to Antarctic latitudinal gradient

  • Andrés Mansilla University of Magallanes; Institute of Ecology and Biodiversity
  • Fabio Méndez University of Magallanes; Institute of Ecology and Biodiversity
  • Silvia Murcia University of Magallanes
  • Juan Pablo Rodriguez University of Magallanes; Institute of Ecology and Biodiversity
  • Johanna Marambio University of Magallanes; Institute of Ecology and Biodiversity
  • Sebastián Rosenfeld University of Magallanes; Institute of Ecology and Biodiversity
  • Nair Yokoya Instituto de Botânica
  • Kai Bischof University of Bremen
Keywords: Macroalgae, Phaeophyceae, photosynthesis, physiology, environmental heterogeneity, Chile

Abstract

Photosynthesis at high latitudes demands efficient strategies of light utilization to maintain algal fitness and performance. The fitness, and physiological adaptation, of a plant or algae species depends in part on the abundance and efficiency of the pigments it can produce to utilize the light resource from its environment. We quantified pigment composition and concentration in six species of the brown macroalgal genus Desmarestia, collected from sub-Antarctic sites (Strait of Magellan, Beagle Channel–Cape Horn Province) and sites on the Antarctic Peninsula and adjacent islands. Sub-Antarctic Desmarestia species exhibited lower concentrations of chlorophyll a, chlorophyll c and fucoxanthin than endemic Antarctic species. Antarctic samples of D. menziesii and D. antarctica collected along a decreasing latitudinal gradient showed spatial and interspecific differences in light-harvesting pigment composition. Our results suggest distinct physiological adjustments in Desmarestia species in response to heterogeneous abiotic environmental conditions. The marine sub-Antarctic and Antarctic ecosystems are characterized by harsh environments (e.g., extreme irradiance, photoperiod, temperature, salinity) to which the physiology of macroalgal species must adapt.

Keywords: Macroalgae; Phaeophyceae; photosynthesis; physiology; environmental heterogeneity; Chile.

(Published: 4 August 2016)

Citation: Polar Research 2016, 35, 29383,http://dx.doi.org/10.3402/polar.v35.29383

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Published
2016-08-04
How to Cite
Mansilla, A., Méndez, F., Murcia, S., Rodriguez, J. P., Marambio, J., Rosenfeld, S., Yokoya, N., & Bischof, K. (2016). Adjustment of pigment composition in <em>Desmarestia </em&gt;(Desmarestiaceae) species along a sub-Antarctic to Antarctic latitudinal gradient. Polar Research, 35. https://doi.org/10.3402/polar.v35.29383
Section
Research/review articles