Feeding, Dark Survival, and Foreign Organelle Retention in an Antarctic Dinoflagellate

The retention by protists of foreign plastids and other organelles obtained from algal prey is an ecologically important example of mixotrophy and also represents a potential pathway for the symbiogenetic evolution of novel permanent plastids. A gymnodinoid dinoflagellate isolated from the Ross Sea, Antarctica (RSD) retains plastids from its haptophyte prey Phaeocystis antarctica. It is a member of the Kareniaceae, a dinoflagellate family whose other members all contain permanent tertiary plastids of haptophyte origin. A subset of its cells also contain foreign nuclei. The following chapters describe experiments that indicate the RSD's selectivity for P. antarctica in feeding and plastid uptake, when compared to other potential prey; and observations that demonstrate survival of plastid-retaining RSD for over two years in the absence of its prey. Further experiments assess the resilience of P. antarctica and the RSD in response to the prolonged darkness of the austral winter.

Grantor dc:publisher

Temple University. Libraries

Year dc:date.issued

2014

Author dc:creator

• Sellers, Charles Grier

Advisor dc:contributor.advisor

• Sanders, Robert W.

Committee members dc:contributor.committeemember

• Cordes, Erik E.
• Sheffield, Joel B.
• Gast, Rebecca J.

• Biology
• Dinoflagellate
• Haptophyte
• Kareniaceae
• Karyoklepty
• Kleptoplasty
• Phaeocystis Antarctica

Statement dc:rights

• IN COPYRIGHT- This Rights Statement can be used for an Item that is in copyright. Using this statement implies that the organization making this Item available has determined that the Item is in copyright and either is the rights-holder, has obtained permission from the rights-holder(s) to make their Work(s) available, or makes the Item available under an exception or limitation to copyright (including Fair Use) that entitles it to make the Item available.

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

eng

Dc Identifier Other

904556442

OAI identifier oai:identifier

oai:scholarshare.temple.edu:20.500.12613/3545