Intraspecific and interspecific variation in thermotolerance and photoacclimation in Symbiodinium dinoflagellates.

ABSTRACT: Light and temperature are major drivers in the ecology and biogeography of symbiotic dinoflagellates living in corals and other cnidarians. We examined variations in physiology among 11 strains comprising five species of clade A Symbiodinium We grew cultures at 26°C (control) and 32°C (high temperature) over a duration of 18 days while measuring growth and photochemical efficiency (F_v /F_m ). Responses to thermal stress ranged from susceptible to tolerant across species and strains. Most strains exhibited a decrease in cell densities and F_v /F_m when grown at 32°C. Tolerance to high temperature (T₃₂) was calculated for all strains, ranging from 0 (unable to survive at high temperature) to 1 (able

SUBMITTER: Diaz-Almeyda EM 

PROVIDER: S-EPMC5740277 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature