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Full-Text Articles in Life Sciences
Effect Of Temperature On Growth And Gene Expression In The Marine Diatom, Thalassiosira Pseudonana, John M. Foster
Effect Of Temperature On Growth And Gene Expression In The Marine Diatom, Thalassiosira Pseudonana, John M. Foster
USF Tampa Graduate Theses and Dissertations
Diatoms are unicellular, eukaryotic, photosynthetic algae responsible for the production of 20% of our atmospheric oxygen. Diatoms contribute to several important biogeochemical functions. Diatoms contribute to the carbon cycle, sequestering carbon and forming oxygen as a product of photosynthesis. Moreover, by converting abiotic forms of energy such as sunlight into organic compounds (i.e., sugars, starches and lipids), primary producers including diatoms, plants, and phytoplankton feed organisms at higher trophic levels. Consequently, changes in temperature, light intensity, nutrients, salinity and other stress factors that affect primary producers can generate a potentially catastrophic ripple effect at higher trophic levels In this study …
Novel Co2 Transporters From Autotrophic Bacteria From Extreme Environments, Sarah E. Schmid
Novel Co2 Transporters From Autotrophic Bacteria From Extreme Environments, Sarah E. Schmid
USF Tampa Graduate Theses and Dissertations
Autotrophic organisms are responsible for introducing carbon into food webs. These organisms take up dissolved inorganic carbon (DIC) and use it as their major carbon source, converting it to biomass using a variety of carbon fixing pathways (e.g., the Calvin-Benson-Bassham cycle). In nature, DIC concentrations can be low or temporally heterogeneous, so autotrophic organisms adapt with CO2 concentrating mechanisms (CCMs) to facilitate the acquisition and fixation of this dissolved gas. CCMs consist of membrane-spanning DIC transporters, which elevate intracellular DIC concentrations, which in turn are harvested by carboxysomes, proteinaceous microcompartments that contain the carboxylase Ribulose-1,5-bisphosphate carboxylase-oxygenase (RubisCO) and carbonic anhydrase. …