Asteromonas (ass-tear-owe-moan-ass) gracilis, a volvocalean green alga - a group more usually associated with freshwater habitats. With grass green chloroplast with cup-shape (mostly located at base of cells but extending up along the sides), two polar flagella, and starch-enclosed pyrenoid appearing as a disc near posterior end. Cell usually with 6 surface ridges. Differential interference microscopy.
data on this strain. This image is of material from Provasoli-Guillard National Center for Culture of Marine Phytoplankton, images taken by David Patterson and Bob Andersen. Image copyright: Bob Andersen and D. J. Patterson, image used under license to MBL (micro*scope).
download as pdf file
download large file
From the collection
Provasoli-Guillard National Center for Culture of Marine Phytoplankton (CCMP)
|Description of Asteromonas gracilis: Halotolerant species, grows on salt concentrations from 0.5 molar NaCl (seawater) to saturation (4.5 molar NaCl). Adjusts glycerol content to offset osmotic gradients across the cell surface. |