| Macroevolution of complex cytoskeletal systems in euglenids. | |
| | |
MedLine Citation:
|
PMID: 17876783 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Euglenids comprise a group of single-celled eukaryotes with diverse modes of nutrition, including phagotrophy and photosynthesis. The level of morphological diversity present in this group provides an excellent system for demonstrating evolutionary transformations in morphological characters. This diversity also provides compelling evidence for major events in eukaryote evolution, such as the punctuated effects of secondary endosymbiosis and mutations in underlying developmental mechanisms. In this essay, we synthesize evidence for the origin, adaptive significance and diversification of the euglenid cytoskeleton, especially pellicle ultrastructure, pellicle surface patterns, pellicle strip number and the feeding apparatus. We also highlight holes in our knowledge that must be filled before we are able to confidently describe euglenid cell biology and infer the earliest stages in euglenid evolution. Nonetheless, by possessing combinations of characters resulting from adaptive change and morphostasis, euglenids have retained key pieces of evidence necessary for reconstructing the early evolution and diversification of eukaryotic life. |
| | |
Authors:
|
Brian S Leander; Heather J Esson; Susana A Breglia |
Related Documents
:
|
10667623 - Oral support measures used in feeding the preterm infant. 1484833 - Effect of prolonged, continuous rectal distention on mouth-to-cecum and colonic transit... 15953333 - Double aortic arch presenting as severe bronchiolitis in a 2-week-old infant. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Review |
Journal Detail:
|
Title: BioEssays : news and reviews in molecular, cellular and developmental biology Volume: 29 ISSN: 0265-9247 ISO Abbreviation: Bioessays Publication Date: 2007 Oct |
Date Detail:
|
Created Date: 2007-09-24 Completed Date: 2007-11-30 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8510851 Medline TA: Bioessays Country: United States |
Other Details:
|
Languages: eng Pagination: 987-1000 Citation Subset: IM |
Affiliation:
|
Canadian Institute for Advanced Research, Program in Integrated Microbial Biodiversity, Departments of Botany and Zoology, University of British Columbia, Vancouver, Canada. bleander@interchange.ubc.ca |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Biodiversity Cell Membrane Structures / ultrastructure Cytoskeleton / ultrastructure* Euglena / classification, genetics, ultrastructure* Eukaryotic Cells / classification, physiology Evolution* Models, Biological Phagocytosis Phylogeny |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The management of DNA double-strand breaks in mitotic G2, and in mammalian meiosis viewed from a mit...
Next Document: The collagen family members as cell adhesion proteins.