The oxidation of the global ocean by cyanobacterial oxygenic photosynthesis, about 2,100
Myr ago, is presumed to have limited anoxygenic bacterial photosynthesis to oceanic …

We present a methodology, called fast repetition rate (FRR) fluorescence, that measures the
functional absorption cross-section (σしぐまPS II) of Photosystem II (PS II), energy transfer …

THE surface waters of the equatorial Pacific have unusually high nitrate and phosphate
concentrations, but relatively low phyto-plankton biomass1–3. This' high nitrate, low …

THE eastern equatorial Pacific Ocean is one of only three open-ocean regions where low
phytoplankton chlorophyll biomass persists despite perennially high nitrate and phosphate …

The vertical distribution of bacteriochlorophyll a, the numbers of infrared fluorescent cells,
and the variable fluorescence signal at 880 nanometers wavelength, all indicate that …

Diel fluorescence patterns were discovered in phytoplankton sampled over 7000 kilometers
of the South Pacific Ocean that appear indicative of iron-limiting growth conditions. These …

In zooxanthellate corals, excess excitation energy can be dissipated as heat
(nonphotochemical quenching), thereby providing protection against oxidative damage by …

Exposure of algae or higher plants to bright light can result in a photoinhibitory reduction in
the number of functional PS II reaction centers (n) and a consequential decrease in the …

Phytoplankton photosynthetic physiology can be investigated through single-turnover
variable chlorophyll fluorescence (ST-ChlF) approaches, which carry unique potential to …

Seven strains of marine aerobic anoxygenic phototrophs belonging to the genus
Erythrobacter were isolated. The strains were characterized regarding their physiological …