Oxygenic Photosynthesis in Cyanobacteria (PDF …

Singh AK and Sherman LA (2007) Reflections on the function of IsiA, a cyanobacterial stress‐inducible, Chl‐binding protein. Photosynthesis Research 93: 17–25.

Schopf W (2010) The paleobiological record of photosynthesis. Photosynthesis Research 107: 87–101.

use sunlight as a source of energy and through the process of photosynthesis, reduce carbon dioxide to form carbohydrates such as glucose. The radient energy is converted to the chemical bond energy within glucose and other organic molecules.

Anoxygenic Photosynthesis Controls Oxygenic Photosynthesis in a ..

Plants, algae, and cyanobacteria are known as because they synthesize organic molecules from inorganic materials, convert light energy into chemical energy, use water as an electron source, and generate oxygen as an end product of photosynthesis.

Simple Bacteria Offer Clues to the Origins of Photosynthesis

In this study we aimed to understand this counter-intuitive observation. Past studies showed that only some morphotypes of cyanobacteria are found encrusted in iron (Pierson and Parenteau, ; Parenteau and Cady, ) while others are not; however a mechanism to account for these differences was not suggested. Pierson et al. () showed that cyanobacterial mats from iron rich environments were characterized by high photosynthetic O2 production, which was similar to our observation in the cyanobacterial biofilms growing in the Fe2+-rich reactors. Hence, we hypothesized that it is the high rate of oxygenic photosynthesis that allows cyanobacterial proliferation in the Fe2+-rich environment of the Äspö HRL. Specifically, due to mass transfer limitations, cyanobacterial photosynthesis creates a microenvironment with elevated O2 concentrations and pH that causes high rates of Fe2+ oxidation and precipitation at a non-lethal distance from the cells and thus prevents their iron self-encrustation.

photosynthesis | Importance, Process, & Reactions - …

Most photosynthetic marine invertebrates should be kept with lamps of a daylight Kelvin temperature from 6400-14,000 K (higher Kelvin with deeper specimen placement, not necessarily tank depth). 20,000K daylight lamps can also be used for deeper tanks (over 22 inches) and/or supplementation with more blue lights (400nm- 490nm).

Scientists Are Rewriting the History of Photosynthesis - WIRED

Oxygenic phototrophs are often found in microbial mats in Fe2+-rich environments (Pierson et al., ; Brown et al., , ; Wieland et al., ). It is known that when the photosynthetically active cells are densely packed in a volume where transport is limited by diffusion (e.g., in photosynthetic biofilms or mats), their activity leads to a locally increased pH and O2 concentration (Pierson et al., ; Wieland et al., ), which should favor locally higher rates of Fe2+ oxidation and precipitation. Yet, oxygenic phototrophs in Fe2+-rich environments have seldom been found encrusted in precipitated iron (Pierson and Parenteau, ). A defense mechanism against iron self-encrustation that would enable oxygenic phototrophs to thrive in Fe2+-rich environments has hitherto not been suggested. Although cyanobacteria that accumulate iron precipitates intracellularly were described from Yellowstone National Park (Brown et al., ), this phenomenon has not been found elsewhere.

14.01.2018 · The molecular biology of photosynthesis

Photosynthetic invertebrates (many corals, anemones, clams, nudibranch, etc.) also need more blue (400-490nm) than "higher" plants especially as tanks increase in depth, such as the 465-485 blue spectrum. Not only is blue/actinic lighting beneficial to photosynthetic invertebrates, it is also aesthetically pleasing to the eye and the 420 nm blue in particular brings out the colors of many corals/clams.
Osram Oslon now has a "patent pending" LED emitter (the NP Blue) that is the first 'blue' emitter SPECIFICALLY designed for the full PAR spectrum required by marine photosynthetic invertebrates (see for more)