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NUCLEOMORPH KARYOTYPE DIVERSITY IN THE FRESHWATER CRYPTOPHYTE GENUS CRYPTOMONAS1
 

Summary: NUCLEOMORPH KARYOTYPE DIVERSITY IN THE FRESHWATER CRYPTOPHYTE
GENUS CRYPTOMONAS1
Kyle D. Phipps, Natalie A. Donaher, Christopher E. Lane, and John M. Archibald2
Canadian Institute for Advanced Research, Integrated Microbial Biodiversity Program, Department of Biochemistry and Molecular
Biology, Dalhousie University, Sir Charles Tupper Medical Building, 5850 College Street, Halifax, Nova Scotia B3H 1X5, Canada
Cryptophytes are unicellular, biflagellate algae
with plastids (chloroplasts) derived from the uptake
of a red algal endosymbiont. These organisms are
unusual in that the nucleus of the engulfed red alga
persists in a highly reduced form called a nucleo-
morph. Nucleomorph genomes are remarkable in
their small size (<1,000 kilobase pairs [kbp]) and
high degree of compaction (1 kbp per gene).
Here, we investigated the molecular and karyotypic
diversity of nucleomorph genomes in members of the
genus Cryptomonas. 18S rDNA genes were amplified,
sequenced, and analyzed from C. tetrapyrenoidosa
Skuja CCAP979 / 63, C. erosa Ehrenb. emmend. Hoef-
Emden CCAP979 / 67, Cryptomonas sp. CCAP979 / 52,
C. lundii Hoef-Emden et Melkonian CCAP979 / 69,

  

Source: Archibald, John - Department of Biochemistry and Molecular Biology, Dalhousie University
Lane, Chris - Department of Biological Sciences, University of Rhode Island

 

Collections: Biology and Medicine