Prochlorococcus: Approved for export

Prochlorococcus: approved for export.

T he oceans account for approximately half of global carbon fixation (1), but unlike plantdominated terrestrial environments, marine photosynthesis is dominated by single-celled microbes, or phytoplankton. These phytoplankton are the engines that drive marine food webs and biogeochemistry. Among the vast variety of phytoplankton found in the open ocean, the non-nitrogen-fixing cyanobacterium Pr...

THE MICROBIAL QUALITY OF OSTRICH CARCASES PRODUCED AT AN EXPORT-APPROVED SOUTH AFRICAN ABATTOIR By

Approved for Public Release Approved for Public Release

Ultradian Growth in Prochlorococcus spp.

Species of the widespread marine prokaryote Prochlorococcus exhibited ultradian growth (faster than 1 division per day) both in situ and in culture, even though cell division is strictly phased to the light-dark cycle. Under optimal conditions a second DNA replication and cell division closely followed, but did not overlap with, the first division. The timing of cell cycle events was not affect...

Margalef’s mandala, Prochlorococcus, and geoengineering*

Ocean phytoplankton played a central role in oxygena ng our planet’s atmosphere billions of years ago. Hence these early “geoengineers” were crucial for the evolu on of life on Earth. Their modern-day ancestor, the marine cyanobacterium Prochlorococcus, is the most abundant photosynthe c cell on the planet. Its discovery 30 years ago served as a reminder of how li le we understand about the com...