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Molecular genetic evidence that dinoflagellates belonging to the genus Symbiodinium freudenthal are haploid


Metadata FieldValueLanguage
dc.contributorScott Santos, santosr@auburn.eduen_US
dc.creatorSantos, Scott R
dc.creatorCoffroth, Mary Alice
dc.date.accessioned2019-08-02T16:38:30Z
dc.date.available2019-08-02T16:38:30Z
dc.date.created2003-02
dc.identifier10.2307/1543491en_US
dc.identifier.urihttps://www.journals.uchicago.edu/doi/abs/10.2307/1543491en_US
dc.identifier.urihttp://hdl.handle.net/11200/49441
dc.description.abstractMicroscopic and cytological evidence suggest that many dinoflagellates possess a haploid nuclear phase. However, the ploidy of a number of dinoflagellates remains unknown, and molecular genetic support for haploidy in this group has been lacking. To elucidate the ploidy of symbiotic dinoflagellates belonging to the genus Symbiodinium, we used five polymorphic microsatellites to examine populations harbored by the Caribbean gorgonians Plexaura kuna and Pseudopterogorgia elisabethae; we also studied a series of Symbiodinium cultures. In 690 out of 728 Symbiodinium samples in hospite (95% of the cases) and in all 45 Symbiodinium cultures, only a single allele was recovered per locus. Statistical testing of the Symbiodinium populations harbored by P. elisabethae revealed that the observed genotype frequencies deviate significantly from those expected under Hardy-Weinberg equilibrium. Taken together, our results confirm that, in the vegetative life stage, members of Symbiodinium, both cultured and in hospite, are haploid. Furthermore, based on the phylogenetics of the dinoflagellates, haploidy in vegetative cells appears to be an ancestral trait that extends to all 2,000 extant species of these important unicellular protists.en_US
dc.formatPDFen_US
dc.publisherNational Science Foundation, Minority Grade Fellowship, Caribbean Marine Research Center/NURC, New York State Sea Granten_US
dc.relation.ispartofThe Biological Bulletinen_US
dc.relation.ispartofseries0006-3185en_US
dc.rights© 2003. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.subjectDinoflagellidaen_US
dc.subjectHaploidyen_US
dc.subjectPlexaura kunaen_US
dc.subjectPseudopterogorgia elisabethaeen_US
dc.subjectSymbiodiniumen_US
dc.subjectPhylogeneticsen_US
dc.subjectGorgoniansen_US
dc.titleMolecular genetic evidence that dinoflagellates belonging to the genus Symbiodinium freudenthal are haploiden_US
dc.typeCollectionen_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume204en_US
dc.citation.issue1en_US
dc.citation.spage10en_US
dc.citation.epage20en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US

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