Where does Thalassiosira Pseudonana live?
Ecology: Thalassiosira pseudonana is a cosmopolitan species typically found in freshwater and coastal brackish habitats. It is usually a phytoplankton species but has also been recorded in the periphyton.
What is Thalassiosira pseudonana?
Thalassiosira pseudonana is a species of marine centric diatoms. It was chosen as the first eukaryotic marine phytoplankton for whole genome sequencing.
Is Thalassiosira phytoplankton?
Thalassiosira pseudonana was chosen as the first eukaryotic marine phytoplankton for whole genome sequencing because of its relatively small genome (34 mega base pairs) and this species has served as a model for many diatom physiology studies.
How does Thalassiosira Pseudonana reproduce?
pseudonana was induced into sexual reproduction by ammonium. Some of the induced genes are linked to meiosis or encode flagellar structures of heterokont and cryptophyte algae.
What is Thalassiosira sp?
Thalassiosira is a genus of centric diatoms, comprising over 100 marine and freshwater species. It is a diverse group of photosynthetic eukaryotes that make up a vital part of marine and freshwater ecosystems, in which they are key primary producers and essential for carbon cycling.
Do diatoms have flagella?
Diatoms are mostly non-motile; however, sperm found in some species can be flagellated, though motility is usually limited to a gliding motion. In centric diatoms, the small male gametes have one flagellum while the female gametes are large and non-motile (oogamous).
Are diatoms asexual?
Similar to other microbial eukaryotes, diatoms are facultatively sexual. They undergo extended periods of asexual (mitotic) reproduction, with a unique result that the average cell size of the diatom population decreases due to constraints of the silica cell wall.
What group is the genus Thalassiosira found in?
|Thalassiosira Temporal range:|
|Genus:||Thalassiosira P.T. Cleve, 1873 emend. Hasle, 1973|
Are diatoms phytoplankton or zooplankton?
The most common phytoplankton are diatoms, photosynthesizing dinoflagellates, and blue-green algae. Zooplankton include protozoans such as foraminiferans, radiolarians, and non-photosynthesizing dinoflagellates as well as animals like tiny fish and crustaceans such as krill.
How do you breed diatoms?
Diatoms reproduce asexually by cell division to produce two daugther cells by mitosis; each daughter cell receives one valve and it is reproduced by furrowing.
What are the isotope effects of Thalassiosira pseudonana?
In one culture study of the diatom Thalassiosira pseudonana, the isotope effects of nitrate, nitrite, ammonium, and urea were estimated to be 4.5‰, 0.9‰, 20‰, and 0.8‰, respectively ( Figure 4 ).
Why was Thalassiosira pseudonana chosen for whole genome sequencing?
The marine centric diatom Thalassiosira pseudonana was chosen as the first eukaryotic marine phytoplankton for whole genome sequencing because this species has served as a model for diatom physiology studies, the genus Thalassiosira is cosmopolitan throughout the world’s oceans, and the genome is relatively small at 34 mega base pairs.
How long does it take for radiolabelled Thalassiosira pseudonana to take up thorium?
There was some assimilation by internal tissues (3% after 4 days feeding on radiolabelled—2.1 kBq Am-241—diatoms Thalassiosira pseudonana ). Thorium-234 (Th-234) is also taken up (exposure conditions = 0.03 Bq ml − 1) and concentrated by M. norvegica, reaching a steady state (~ 180 concentration factor) within 3 or 4 days ( Baena et al., 2008 ).
Where can I find a clone of Trichomonas pseudonana?
The clone of T. pseudonana that was sequenced is CCMP 1335 and is available from the Center for Culture of Marine Phytoplankton. This clone was collected in 1958 from Moriches Bay (Long Island, New York) and has been maintained continuously in culture.