Decreased Salinity Offsets the Stimulation of Elevated pCO₂ on Photosynthesis and Synergistically Inhibits the Growth of Juvenile Sporophyte of Saccharina japonica (Laminariaceae, Phaeophyta).

ABSTRACT: The combined effect of elevated pCO₂ (Partial Pressure of Carbon Dioxide) and decreased salinity, which is mainly caused by freshwater input, on the growth and physiological traits of algae has been poorly assessed. In order to investigate their individual and interactive effects on the development of commercially farmed algae, the juvenile sporophytes of Saccharina japonica were cultivated under different levels of salinity (30, 25 and 20 psu) and pCO₂ (400 and 1000 µatm). Individually, decreased salinity significantly reduced the growth rate and pigments of S. japonica, indicating that the alga was low-salinity stressed. The maximum quantum yield, F_v/F_m, declined at low salinities independent of pCO₂, suggesting that th

SUBMITTER: Zhang W 

PROVIDER: S-EPMC9656199 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature