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
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.