A Molecular Phylogenetic Assessment of Pseudendoclonium

Richard F. Mullins Jr., University of Massachusetts Amherst

Document Type: Open Access

Degree Program

Plant Biology

Degree Type

Master of Science (M.S.)

Year Degree Awarded

2007

Month Degree Awarded

September

Primary Subject Category

Biology

Secondary Subject Category

Botany; Cellular biology; Molecular biology

Keywords

taxonomy green algae

Advisor(s) or Committee Chair

Cooley, Daniel R.
Wilce, Robert T.

 

Abstract

ABSTRACT A MOLECULAR PHYLOGENETIC ASSESSMENT OF PSEUDENDOCLONIUM SEPTEMBER 2007 RICHARD F. MULLINS JR., B.S., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Daniel R. Cooley Pseudendoclonium was established in 1900 by N. Wille to include a crust-forming green microalga occurring near the high water line on jetties in Drobak, Norway. Ordinal and familial affiliation of the genus have remained uncertain due to a lack of distinguishing morphological characteristics and because molecular phylogenetic data have not been generated for the type species. Ribosomal SSU rDNA sequence data for Pseudendoclonium submarinum, the type species, are presented. Phylogenetic analysis of these data place Pseudendoclonium within the Ulvales. SSU rDNA sequence data from three additional species, Pseudendoclonium basiliense, Pseudendoclonium akinetum and Pseudendoclonium fucicola are included in the analyses and clearly support the hypothesis that Pseudendoclonium is polyphyletic. Based on the sequence data, P. submarinum and P. fucicola share ulvalean lineage, but these algae are not congeneric and P. fucicola must be removed from Pseudendoclonium. Sequence data support the classification of P. basiliense and P. akinetum as distinct species of a single genus. The close affiliation of these two species with Ulothrix and other Ulotrichalean genera, however, reveals their ordinal separation from P. submarinum. P. basiliense and P. akinetum must also be removed from Pseudendoclonium and require generic reassignment within the Ulotrichales.

Recommended Citation

Mullins, Richard F. Jr., "A Molecular Phylogenetic Assessment of Pseudendoclonium" (2007). Masters Theses. Paper 47.
http://scholarworks.umass.edu/theses/47