Journal article
Monophyly of Genera and Species of Characeae based on rbcL Sequences, with Special Reference to Australian and European Lychnothamnus barbatus (Characeae: Charophyceae)
Australian journal of botany, v 47(3), pp 361-369
1999
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Abstract
Sequences for the chloroplast-encoded large subunit of the Rubisco gene
(rbcL) were used to test the monophyly of multiple
isolates within species, and multiple species within genera, of green algae in
the Characeae (Class Charophyceae). Parsimony and maximum likelihood analyses
supported the monophyly of genera and most species, with the exception of a
paraphyletic assemblage comprising isolates of two ‘species’,
dioecious Chara connivens Salzm. ex A.Br. and monoecious
C. globularis Thuill., which together constitute a
monophyletic group. The rbcL data support the
independent evolution of either monoecious or dioecious sexual systems in the
two connivens-globularis, clades. Comparisons of
disjunct isolates of the monotypic
Lychnothamnus barbatus (Meyen) Leohn. revealed nearly
identical rbcL sequences in isolates from Croatia,
Germany and Australia, although all three sequences were unique. The variation
exhibited by these isolates was similar to variation between isolates within
species of Chara and
Lamprothamnium from different continents. The limited
variation may be due to dispersal of thalli or oospores between continents;
however, the rarity of known intercontinental transfers of Characeae in the
last two centuries suggests that the Australian population is probably not an
exotic from Europe. Lychnothamnus barbatus populations
in Australia and elsewhere thus merit continued protected status.
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Details
- Title
- Monophyly of Genera and Species of Characeae based on rbcL Sequences, with Special Reference to Australian and European Lychnothamnus barbatus (Characeae: Charophyceae)
- Creators
- Richard M. McCourtMichelle T. CasanovaKenneth G. KarolMonique Feist
- Publication Details
- Australian journal of botany, v 47(3), pp 361-369
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:000081899900009
- Scopus ID
- 2-s2.0-0032821508
- Other Identifier
- 991019167753404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Plant Sciences