Fragilariopsis cylindrus

New daughter set created every eight weeks

Daughter set……….…5umol quanta m-2 s-1

Mother set………….….3umol quanta m-2 s-1

Grandmother set….….8umol quanta m-2 s-1

Q+A:

Q: We CCMP1102 growing in our lab and I noticed that the shape of the cells is more of a square than a cylinder. They are growing at 2C, in F/2 media. The square shape is consistent, regardless of the age or growth phase of the culture. I am wondering if this is the normal shape for this strain or if something weird is happening.

A: The square shape is normal for this strain. It may be due to being in culture since 1982. I was documented in house as mostly single square shape cells with a few chains in December of 2000.

Documentation:

High variability in cellular stoichiometry of carbon, nitrogen, and phosphorus within classes of marine eukaryotic phytoplankton under sufficient nutrient concentrations (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5880891/)

Photophysiology in two major Southern Ocean phytoplankton taxa: photosynthesis and growth of Phaeocystis antarctica and Fragilariopsis cylindrus under different irradiance levels (https://academic.oup.com/icb/article/50/6/950/629384)

Gross and net production during the spring bloom along the Western Antarctic Peninsula (https://pubmed.ncbi.nlm.nih.gov/25382393/)

Functional group-specific traits drive phytoplankton dynamics in the oligotrophic ocean (https://www.pnas.org/doi/10.1073/pnas.1518165112)