Polysiphonia morrowii Harvey'nin Biyokimyasal ve Fizyolojik Özellikleri Üzerinde Etkili Bir Parametre: Tuzluluk Stresi

Abstract

In recent years, rising temperatures due to global climate change can constitute a decrease in salinity in the oceans by causing the ice to melt early and freeze late in its annual cycle and increased precipitation. On the other hand, high temperatures can increase the salinity of seawater locally by enhancing evaporation. It is expected that the changes in salinity of sea water would affect communities of seaweeds. In this study, Polysiphonia morrowii Harvey samples were collected from Altıntaş station in the Gulf of Gemlik in April 2013, and cultured in mediums with four different salt concentrations (10‰, 23‰, 33‰, 42‰). The changes of this species in the amounts of total protein, total phenol, phycocyanin (PC), phycoerythrin (PE), chlorophyll-a (Chl a), water-soluble antioxidant, oil-soluble antioxidant, total solid organic matter and the activity of the carbonic anhydrase were determined. The study clearly showed that studied biochemical and physiological properties of the species were affected by salinity changes. It is also detected that P. morrowii is a tolerant species that can adapt to changing salinity conditions with various defense strategies.