Topic
Carteria
About: Carteria is a research topic. Over the lifetime, 24 publications have been published within this topic receiving 656 citations.
Papers
TL;DR: It is suggested that fibrous structures may be more useful than microtubular roots in elucidating phylogenetic relationships within the Chlorophyceae sensu Stewart and Mattox and the Prasinophycee sensu Christensen.
Abstract: Ultrastructural aspects of fibrous structures associated with basal bodies of green algae are critically discussed. It is apparent that variation among these structures is much greater than in microtubular flagellar root systems and it is therefore suggested that fibrous structures may be more useful than microtubular roots in elucidating phylogenetic relationships within the Chlorophyceae sensu Stewart and Mattox and the Prasinophyceae sensu Christensen. Two main types of fibrous structures are distinguished: (1) Connecting fibres (these connect different basal bodies); (2) Fibrous roots (these originate at basal bodies and terminate somewhere else in the cell). Fibrous roots are of two types: (a) microtubular-root associated striated fibres (striation pattern 25–35 nm; system I-fibres); (b) striated fibres composed of a bundle of filaments (filament diameter: 5–10 nm; striation pattern greater than 80 nm; system II fibres). Numbers, disposition and substructure of connecting fibres and fibrous roots are variable in different genera of green algae. In the experimental section new observations on fibrous roots in the ulvalean genus Enteromorpha as well as preliminary information on fibrous structures in Carteria obtusa and Bryopsis lyngbyei are included. Functional and evolutionary aspects of fibrous structures associated with the flagellar apparatus of green algae are discussed.
148 citations
TL;DR: Both data sets support the conclusion that Chlamydomonas is not monophyletic, and although the chloroplast data are ambiguous regarding the question of Carteria monophyly, the nuclear data fail to support Carteriamonophyly.
97 citations
TL;DR: This study examined the phylogeny of three genera of quadriflagellate Volvocales using concatenated sequences from three chloroplast genes and found them to be basal to other members of the CW (clockwise) group (the Volvocalean algae) and formed three robust clades.
68 citations
65 citations
TL;DR: The fine structure of the flagellar apparatus of 5 species of the green quadriflagellate alga Carteria is described and shows a complex system of microtubule bands and sigmoid‐shaped, electron dense rods which extend between opposite pairs of basal bodies.
Abstract: SUMMARY
The fine structure of the flagellar apparatus of 5 species of the green quadriflagellate alga Carteria is described. The 5 species can be morphologically separated into 2 groups on the bases of cell shape and ultrastructure of the pyrenoid and flagellar apparatus. Group I cells are spherical, possess many pyrenoid thylakoids, and retain a flagellar apparatus similar to that of Chlamydomonas reinhardi. The flagellar bases are oriented at approximately 90° to one another, have distal and proximal fibers, and are associated with 4 cruciately arranged microtubule bands. Cells of group II are ellipsoid, possess few pyrenoid thylakoids, and show a complex system of microtubule bands and sigmoid-shaped, electron dense rods which extend between opposite pairs of basal bodies. The basal bodies of group II cells are directed inward in a circular pattern rather than outward as in group I cells. Unlike Chlamydomonas, the distal fiber of the Carteria species is nonstriated. The proximal fiber is striated, and both distal and proximal fibers are composed of 60–80 A diameter microfibrils.
52 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2010 | 1 |
| 2005 | 1 |
| 2004 | 1 |
| 2003 | 2 |
| 2002 | 1 |
| 1997 | 1 |