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Journal article
PHYLOGENETIC POSITION OF ZYGOGONIUM ERICETORUM (ZYGNEMATOPHYCEAE, CHAROPHYTA) FROM A HIGH ALPINE HABITAT AND ULTRASTRUCTURAL CHARACTERIZATION OF UNUSUAL APLANOSPORES
Journal of phycology, v 50(5), pp 790-803
01 Oct 2014
PMID: 25810560
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Zygogonium ericetorum
, the type species of the genus, was studied from a natural population collected in Mt. Schönwieskopf, Tyrol, Austria. Generic concepts of
Zygogonium
and
Zygnema
were tested with
atpB, psbC
, and
rbcL
gene sequence analysis, which showed a sister relationship between
Z. ericetorum
and
Mesotaenium
, in an early branching clade sister to a grouping of
Zygnema
and several other filamentous and unicellular zygnematalean taxa. A variety of light, confocal, transmission electron microscopy, and cytochemical techniques provided new data on the variable chloroplast shape of
Z. ericetorum
, and its aplanospore structure and development, which has been previously considered taxonomically important but has been ambiguously interpreted.
Zygogonium
can be distinguished from other zygnematophytes (particularly
Zygnema
), based on the combination of two characters: (i) irregular, compressed plate-like chloroplasts and (ii) residual cytoplasmic content left in sporangia outside of the fully developed aplanospores or zygospores. The presence of a sporangial wall that separates the spores from the parent cell should be excluded from the definition of
Zygogonium
, because it is also observed in
Zygnema
. Similarly, the ecological characterization of
Zygogonium
as acidophilic is not unique to the genus. The names of 18 species currently belonging to
Zygogonium
are here changed to
Zygnema
, because of incompatibility with this new proposed
Zygogonium
concept. In the species transferred to
Zygnema
, chloroplasts are typically stellate in three-dimensions, and the entire content of fertile cells is transformed into the spore, so there is no cytoplasmic residue.
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Details
- Title
- PHYLOGENETIC POSITION OF ZYGOGONIUM ERICETORUM (ZYGNEMATOPHYCEAE, CHAROPHYTA) FROM A HIGH ALPINE HABITAT AND ULTRASTRUCTURAL CHARACTERIZATION OF UNUSUAL APLANOSPORES
- Creators
- Rosalina Stancheva - California State University, San MarcosJohn D. Hall - Academy of Natural Sciences of Drexel UniversityKlaus Herburger - Universität InnsbruckLouise A. Lewis - University of ConnecticutRichard M. McCourt - Drexel UniversityRobert G. Sheath - California State University, San MarcosAndreas Holzinger - Universität Innsbruck
- Publication Details
- Journal of phycology, v 50(5), pp 790-803
- Publisher
- Wiley
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES); Academy of Natural Sciences of Drexel University
- Web of Science ID
- WOS:000342891000003
- Scopus ID
- 2-s2.0-84908554279
- Other Identifier
- 991019167971904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Marine & Freshwater Biology
- Plant Sciences