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Newest Members of the NCMA Collection.

The NCMA collection has actively grown through contributions from you the user community.  Recently Dr. Tatiana Rynearson of the University of Rhode Island contributed 25 strains of diatoms isolated from waters around the Antarctic continent.  These strains, and their new CCMP strain numbers, are listed in the table below.  These strains make a significant addition to our 'polar' sub-collection and are ready to support your research.

CCMP####Genus speciesIsolation LocationLatitude (oN)Longitude (oW)Date of CollectionDepth of Collection (m)Relative Growth Rate
CCMP3550Thalassiosira ritscheriAmundsen Sea-68.25-128.481/8/20177


CCMP3547Thalassiosira ritscheri

Palmer LTER

CCMP3548Thalassiosira ritscheriPalmer LTER-66.45-66.8412/30/201620FAST
CCMP3552Thalassiosira ritscheriRoss Shelf-77.28-170.361/13/201725FAST
CCMP3549Stellarima microtriasAmundsen Sea-68.29-95.421/4/201735MEDIUM
CCMP3543Stellarima microtriasPalmer LTER-66.45-66.8412/20/20162MEDIUM
CCMP3546Stellarima microtriasPalmer LTER-65.24-66.7812/30/201641MEDIUM

Porosira pseudodenticulata

Palmer LTER-67.74-69.891/1/20172MEDIUM
CCMP3551Porosira pseudodenticulataRoss Sea-74.63-153.371/12/201728MEDIUM
CCMP3545Coscinodiscus sp.Palmer LTER-67.74-69.891/1/20172SLOW
CCMP3553Actinocyclus actinochilusPalmer LTER-65.24-66.7812/30/201641SLOW
CCMP3561Actinocyclus actinochilusPalmer LTER-67.82-69.971/1/20172SLOW
CCMP3556Actinocyclus actinochilusRoss Sea-72.34-146.351/11/2017DeepSLOW
CCMP3559Actinocylcus curvatulusRoss Shelf-77.36-169.561/13/20172SLOW
CCMP3562Actinocylcus curvatulusRoss Shelf-77.28-170.361/13/2017DeepSLOW
CCMP3558Bacteriosira bathyomphalaPalmer LTER-65.61-67.4612/30/201617MEDIUM
CCMP3563Fragilariopsis cylindrusDrake Passage-64.18-69.1012/29/201640FAST


Fragilariopsis cylindrus-63.12-68.9912/29/20166FAST
CCMP3554Porosira glacialisPalmer LTER-66.45-66.8412/30/20162FAST
CCMP3557Porosira glacialisRoss Shelf-75.95-174.291/15/2017DeepFAST
CCMP3560Pseudonitzschia subcurvataRoss Shelf-75.99-178.901/15/201745FAST
CCMP3565Pseudonitzschia subcurvataRoss Shelf-77.36-169.561/13/20172FAST
CCMP3564Shionodiscus sp.Amundsen Sea-68.25-128.481/8/201735MEDIUM
CCMP3566Thalassiosira rotulaRoss Shelf-77.28-170.361/13/2017DeepFAST
CCMP3567Thalassiosira tumidaRoss Shelf-77.36-169.561/13/20172FAST


Recent Publication Based Upon Strains in the NCMA Collection.

Strains in the NCMA collection are the foundation for scientific advance in a wide range of fields. Below is a recent paper that examines the evolutionary history of algae by digging deep into the genome of green plants.  

Li, L., Wang, S., Wang, H., Sahu, S.K., Marin, B., Li, H., Xu, Y., Liang, H., Cheng, S., Reder, T., Çebi, Z., Wittek, S., Petersen, M., Melkonian, B., Du, H., Yang, H., Wang, J., Wong, G.K.-S., Xu, X., Liu, X., Van de Peer, Y., Melkonian, M., Liu, H. (2020). The genome of Prasinoderma coloniale unveils the existence of a third phylum within green plants. Nature Ecology and Evolution. https://doi.org/10.1038/s41559-020-1221-7

Green plants (Virdiplantae) had previously been divided into two groups: the phylum Streptophyta (land plants and the paraphyletic group of streptophyte algae) and the Chlorophyta (all other green algae). However, no living representative of a common ancestor for these lineages had been identified.

Comprised of species living in deep-water, low nutrient environments, the class Palmophyllophyceae was thought to be one of the first divergent lineages within the Chlorophyta. Previous phylogenetic trees were based on organelle genomes, and did not support the divergence of Palmophyllophyceae before the Chlorophyta and Streptophyta.

In this paper, Li et al. (2020) sequenced the nuclear genome of CCMP 1413 Prasinoderma coloniale. The paper discusses their analysis and the characteristics present within P. coloniale. The genome revealed both ancestral and derived characteristics that place P. coloniale at an equal evolutionary distance from either the Chlorophyta or Streptophyta lineages. The new phylum Prasinodermophyta, was established and divided into two classes: Prasinodermophyceae and Palmophyllophyceae emend. This new phylum represents the earliest evolutionary divergence within the Viridiplantae, prior to the Chlorophyta and Stretophyta divergence.