Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea

@inproceedings{Nagalingum2007MolecularPR,
  title={Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea},
  author={Nathalie S. Nagalingum and Harald Schneider and Kathleen M Pryer},
  year={2007}
}
Abstract Using six plastid regions, we present a phylogeny for 26 species of the heterosporous fern genus Marsilea. [] Key Result Two well-supported groups within Marsilea are identified. Group I includes two subgroups, and is relatively species-poor. Species assignable to this group have glabrous leaves (although land leaves may have a few hairs), sporocarps lacking both a raphe and teeth, and share a preference for submerged conditions (i.e., they are intolerant of desiccation).
A Plastid Phylogeny of the Cosmopolitan Fern Family Cystopteridaceae (Polypodiopsida)
TLDR
This work assembles a three-locus plastid dataset (matK, rbcL, trnG-R) that includes most recognized species in the Cystopteridaceae and multiple accessions of widespread taxa from across their geographic ranges, and yields the first species-level phylogeny of the family and the first molecular phylogenetic evidence for species boundaries.
Taxonomy and evolutionary history of the neotropical fern genus Salpichlaena (Blechnaceae)
TLDR
This work systematically documented 62 morphological traits in 283 herbarium specimens and sequenced 52 Salpichlaena specimens, suggesting that a group of specimens, placed into different clades in the plastid and nuclear trees and showing mixed morphological characters, represent a fourth species of hybrid origin.
An Expanded Plastid Phylogeny of Marsilea with Emphasis on North American Species
TLDR
DNA/morphology discordance suggests that these taxa either may have hybridized extensively or that the number of Marsilea species within these clades may be overestimated, which warrants the addition of nuclear data sets and reevaluation of the species boundaries within the genus.
Newly discovered diversity in the tropical fern genus Metaxya based on morphology and molecular phylogenetic analyses
TLDR
Based on the morphological variation among the Metaxya specimens, the authors accept six distinct species, three of which are described as new in this paper, which are considered true species despite the incomplete genetic differentiation.
Erratum to: Newly discovered diversity in the tropical fern genus Metaxya based on morphology and molecular phylogenetic analyses
TLDR
Based on the morphological variation among the Metaxya specimens, the authors accept six distinct species, three of which are described as new in this paper, which are considered true species despite the incomplete genetic differentiation.
A Unified Approach to Taxonomic Delimitation in the Fern Genus Pentagramma (Pteridaceae)
TLDR
Combining spore studies with phylogenetic analyses of plastid and nuclear sequences, this study identifies six genetically and morphologically distinct diploid lineages in Pentagramma, each of which is here treated as a species.
Assessing phylogenetic relationships in extant heterosporous ferns (Salviniales), with a focus on Pilularia and Salvinia
TLDR
These individual species-level investigations for Pilularia and Salvinia, together with previously published studies on Marsilea and Azolla, provide phylogenies within all genera of heterosporous ferns.
A molecular phylogeny of scaly tree ferns (Cyatheaceae).
TLDR
This work investigates the phylogenetic relationships of scaly tree ferns based on DNA sequence data from five plastid regions and concludes that indusium shape is homoplastic it does contain useful phylogenetic information that supports some of the larger clades recognised.
Species Relationships and Farina Evolution in the Cheilanthoid Fern Genus Argyrochosma (Pteridaceae)
TLDR
This reconstruction is used to examine the evolution of farina (powdery leaf deposits), which has played a prominent role in the circumscription of cheilanthoid genera, and indicates that Argyrochosma comprises two major monophyletic groups: one exclusively non-farinose and the other primarily farinose.
Molecular phylogeny, character evolution, and biogeography of the grammitid fern genus Lellingeria (Polypodiaceae).
TLDR
It is suggested that Lellingeria is monophyletic, with two clades that are easily characterized morphologically and biogeographically and a small clade previously considered in Terpsichore should be recognized as a new genus.
...
...

References

SHOWING 1-10 OF 78 REFERENCES
rbcL gene sequences provide evidence for the evolutionary lineages of leptosporangiate ferns.
TLDR
To compare competing classifications, DNA sequences of a chloroplast gene were obtained and phylogenetic trees were inferred by the neighbor-joining and the parsimony methods that provided insights concerning major general evolutionary trends in the leptosporangiate ferns.
Phylogeny of Marsileaceous Ferns and Relationships of the Fossil Hydropteris pinnata Reconsidered
  • K. Pryer
  • Biology
    International Journal of Plant Sciences
  • 1999
TLDR
The phylogeny of Marsileaceae is investigated here using information from morphology and rbcL sequence data, which resulted in two most‐parsimonious trees that differ only in the placement of the fossil Hydropteris.
Phylogeny and Systematics of Lemnaceae, the Duckweed Family
TLDR
Combined data analysis confirms the monophyly of Landoltia, Lemna, Spirodela, Wolffia, and Wolffiella and establishes a single, well-resolved, maximum parsimony tree with 30/36 nodes supported by bootstrap values that exceed 90%.
Phylogeny of Isoetes (Lycopsida): resolving basal relationships using rbcL sequences
The phylogenetic relationships of Isoetes (Isoetaceae) were investigated by means of a cladistic analysis using plastid rbcL sequences and a representative sample of 18 species. The analysis supports
Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences.
The phylogenetic structure of ferns (= monilophytes) is explored here, with a special focus on the early divergences among leptosporangiate lineages. Despite considerable progress in our
Comparative Morphology of Reproductive Structures in Heterosporous Water Ferns and a Reevaluation of the Sporocarp
TLDR
Comparative morphological study reveals that all heterosporous ferns bear indusiate sori on a branched, nonlaminate structure that is referred to as the sorophore; this expanded definition highlights homology previously obscured by the use of different terms.
rbcL data reveal two monophyletic groups of filmy ferns (Filicopsida: Hymenophyllaceae).
TLDR
The results confirm the monophyly of the family and provide robust support for two monophyletic groups that correspond to the two classical genera and show that some taxa of uncertain affinity are convincingly included within Hymenophyllum s.l.
Evaluation of atpB nucleotide sequences for phylogenetic studies of ferns and other pteridophytes.
  • P. Wolf
  • Biology
    American journal of botany
  • 1997
TLDR
The demonstrated utility of atpB suggests that sequences from this gene should play a role in phylogenetic analyses that incorporate data from chloroplast genes, nuclear genes, morphology, and fossil data.
Systematics of the Lemnaceae ( duckweeds ) : inferences from micromolecular and morphological data
TLDR
Phylogenetic analysis of flavonoid and anatomical-morphological data indicate that evolution in the duckweed family has proceeded in a linear manner from complex ancestors to reduced species of subfamilies Wolffioideae.
...
...