Guillardia theta Hill et Wetherbee
| Common Name | chromists | ||||
| Taxonomy by Gene Sequence | No | ||||
| Collection Site | 41.2264°N -73.0639°W Milford, Connecticut USA | ||||
| Ocean | North Atlantic | ||||
| Sea | Long Island Sound | ||||
| Nearest Continent | North America | ||||
| Collected By | Guillard,R | ||||
| Collection Date | |||||
| Isolated By | Guillard,R | ||||
| Isolated Date | 01/01/1957 | ||||
| Identified By | |||||
| Deposited By | Guillard,R (WHOI) | ||||
| Deposit Date | |||||
| Strain Synonyms | THETA, CCMP2712 | ||||
| Is The Strain Currently Axenic? | Yes | ||||
| When Was It Last Tested? | 01/05/2026 | ||||
| Other Information | from a tank | ||||
| Authentic Type/Strain | Yes | ||||
| Morphological Data | |||||
| Attributes | Algae, Marine, Temperate, Warm Water | ||||
| Additional Resources | Genbank Genome Transcriptome AlgaeBase | ||||
| Genome Sequence Link | No | ||||
| Medium Used for Maintenance | h/2 |
| Other Reported Growth Media | K, L1+500uM NH4Cl |
| Maintenance Temperature (°C) | 24 °C |
| Known Temperature Range (°C) | 11 - 25 °C |
| Cell Length (Min) | 8 |
| Cell Length (Max) | 11 |
| Cell Width (Min) | 4 |
| Cell Width (Max) | 6 |
The time required to regrow this culture, prior shipping, is approximately 20 days. If interested, please contact the CCMP for the cryopreservation methods (freezing and/or thawing protocols).
Note that aquaculture strains are always maintained as actively growing cultures, even if also cryogenically stored. Therefore, aquaculture strains (see aquaculture express ordering on the CCMP home page) can be shipped immediately upon request.
New daughter set created every two weeks
Daughter set……….…58umol quanta m-2 s-1
Mother set………….…13umol quanta m-2 s-1
Grandmother set….….16umol quanta m-2 s-1
Documentation:
Light backscattering properties of marine phytoplankton: relationships to cell size, chemical composition and taxonomy (https://academic.oup.com/plankt/article/26/2/191/1490132)
Molecular phylogeny of phycocyanin-containing cryptophytes: evolution of biliproteins and geographical distribution (https://onlinelibrary.wiley.com/doi/10.1111/j.1529-8817.2008.00530.x)
Translocation of a phycoerythrin alpha subunit across five biological membranes (https://pubmed.ncbi.nlm.nih.gov/17702756/)
Light capture and pigment diversity in marine and freshwater cryptophytes (https://onlinelibrary.wiley.com/doi/abs/10.1111/jpy.12816)
Molecular and biochemical analysis of periplastidial starch metabolism in the cryptophyte Guillardia theta (https://journals.asm.org/doi/10.1128/ec.00381-05)
Fe-responsive accumulation of redox proteins ferredoxin and flavodoxin in a marine cryptomonad (https://www.tandfonline.com/doi/full/10.1080/09670260310001637306)