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5-Bisphosphate Carboxylase/Oxygenase; Concentrating Mechanisms; Diel Rhythms; Waters; Expression; Diatoms; Cyanobacteria; Productivity
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Full-Text Articles in Life Sciences
Phytoplankton Carbon Fixation Gene (Rubisco) Transcripts And Air-Sea Co2 Flux In The Mississippi River Plume, De John, Zha Wang, Xw Liu, Rh Byrne, Je Corredor, Da Bronk, Et Al.
Phytoplankton Carbon Fixation Gene (Rubisco) Transcripts And Air-Sea Co2 Flux In The Mississippi River Plume, De John, Zha Wang, Xw Liu, Rh Byrne, Je Corredor, Da Bronk, Et Al.
VIMS Articles
River plumes deliver large quantities of nutrients to oligotrophic oceans, often resulting in significant CO2 drawdown. To determine the relationship between expression of the major gene in carbon fixation (large subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase, RuBisCO) and CO2 dynamics, we evaluated rbcL mRNA abundance using novel quantitative PCR assays, phytoplankton cell analyses, photophysiological parameters, and pCO2 in and around the Mississippi River plume (MRP) in the Gulf of Mexico. Lower salinity (30-32) stations were dominated by rbcL mRNA concentrations from heterokonts, such as diatoms and pelagophytes, which were at least an order of magnitude greater than haptophytes, a-Synechococcus or high-light Prochlorococcus. …