Photosynthesis in Antarctic sea ice diatoms - ePIC

Top left: Plant leaves. Top right: cultured cells of the diatom Phaeodactylum tricornutum.
Image A: Electron micrograph of a plant chloroplast revealing its internal structure of grana (shown in yellow), where PSII predominates, and lamellae (shown in green), where PSI is concentrated. This organization is not found in diatoms (see image B).
Image B: Micrograph of P. tricornutum cell showing photosynthetic membranes that are not organized into grana.
Image C: This 3D reconstruction of the photosynthetic membranes reveals membrane subdomains allowing for physical separation of PSI (outside; green) and PSII (inside; yellow) units. The white arrow points to bridges connecting these subdomains, for maximum photosynthetic yield.

Diatoms | Chroniques du Plancton

Diatoms (class Bacillariophyta) are a type of mainly aquatic, photosynthetic algae

Evolution of photosynthesis - Wikipedia

IfC4 photosynthesis is common among marine diatoms, it mayaccount for a significant portion of carbon fixation and export in theocean, and would explain the greater enrichment of 13C indiatoms compared with other classes of phytoplankton.

The Diversity of Diatoms - Live Science

Here we present evidence that C4photosynthesis supports carbon assimilation in the marine diatomThalassiosira weissflogii, thus providing a biochemical explanation forCO2-insensitive photosynthesis in marine diatoms.

thus providing a biochemical explanation for CO 2-insensitive photosynthesis in marine diatoms
During photosynthesis, diatoms turn carbon dioxide into organic carbon and, ..

Chapter 12 – Algae: the Good, Bad, and Ugly - Saltcorner

Of the 200 genera and 5000 species known, all are eukaryotic and photosynthetic(Alexopoulos, 1967). They contain chlorplasts that have been found to have numerousphotosynthetic pigments giving the chloroplasts a typically golden brown color (Garrison,1997) Photosynthetic pigments include chlorophylls a and c (green), as well as B-carotene(yellow), fucoxanthin (brown), and small amounts of diatoxanthin, diadinoxanthin, andother carotenoids (Bold, 1978). Because of the photosynthetic nature of diatoms, they havetraditionally been placed in the plant kingdom, but many scientists today place them inthe kingdom Protista (Garrison, 1997)

In diatoms, the pigmented organelle that is the site of photosynthesis

Diatoms - eLS: Essential for Life Science

Diatoms are single‐celled autotrophic organisms with highly ornate siliceous walls. They account for more than 20% of the world's primary production, are responsible for much of the petroleum humans use, and deposits of their shells are mined for numerous uses. The most taxonomically diverse groups of photosynthetic protists, diatoms are of ecological importance in nearly every freshwater and marine habitat. Their closest relatives are a poorly known group of microflagellates, some silicified and some not. Efforts to reconstruct diatom phylogeny are hampered by the fact that their true diversity and that of their closest relatives remains unknown. Genomic studies are creating tremendous new opportunities for study of this important group. Perhaps as much as a third of the diatom nuclear genome is now thought to be recently laterally transferred from bacteria. Diatom adaptation to such a wide range of environments may be a result of the resulting novel gene combinations.

12/07/2010 · Best Answer: Yes to both questions. Diatoms are single celled, photosynthetic algae that have two hard coverings of silica.

New Zealand Journal of Botany - Taylor & Francis