首页|Changes in physiological and biochemical parameters of Barents Sea Fucus vesiculosus Linnaeus 1753 in response to low salinity
Changes in physiological and biochemical parameters of Barents Sea Fucus vesiculosus Linnaeus 1753 in response to low salinity
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The physiological and biochemical state of brown alga Fucus vesiculosus from the Barents Sea was studied while maintained in low salinity seawater (10 and 20 PSU) during a 14-day experiment. At both salinity levels, a decrease in respiratory rate andcatalase activity and a significant increase in free amino acids content compared to control conditions (33 PSU) were observed. The photosynthetic activity of algae did not change. Excessive moisture accumulation by algal thalli was observed only at 10 PSU. The noted changes provide evidence that 20 PSU seawater is stressful for this species, but adaptation mechanisms bring physiological and biochemical parameters to the level of those of the control plants in 7-C14 days. A long-term exposure of algae to 10 PSU is lethal. A high free amino acid concentration in the course of the experiment is indicative of their involvement in osmoregulation.
Fucus vesiculosusAdaptationLow salinityPhotosynthesis and respirationFree amino acidsCatalaseBarents Sea
Maria Klindukh、Inna Ryzhik、Mikhail Makarov
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Murmansk Marine Biological Institute of Russian Academy of Sciences, Vladimirskaya str., 17, Murmansk 183010, Russia
Murmansk MarineBiological Institute of Russian Academy of Sciences, Vladimirskaya str., 17, Murmansk 183010, Russia
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