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22 results for “Sphagnaceae”
Rys. 8-11 in Further studies on nematodes (Nematoda) of the Sphagnaceae of the Tatra Mountains
Rys. 8-11. Enchodelus hopedorus (THORNE). 8 - glowa, 9 - plemniki, 10 - przedstekowy narzad plciowy, 11 - ogon samca.
Rys. 4—7 in Further studies on nematodes (Nematoda) of the Sphagnaceae of the Tatra Mountains
Rys. 4—7. Iotonchus zschokkei (MENZEL 4 - glowa, 5 - ogon.samca, 6 — szczecinki kopulacyjne i narzady dodatkowe, 7 - czešé szeregu przedstekowych narzadów plciowych.
Data from: Phylogenetic structure in the Sphagnum recurvum complex (Bryophyta: Sphagnaceae) relative to taxonomy and geography
METHODS <p>RADseq analyses were applied to a sample of 384 collections representing the European, North American, and (to a lesser extent) Asian ranges of the complex. The data were subjected to maximum likelihood phylogenetic analyses and analyses of genetic structure using the software, STRUCTURE, and multivariate ordination approaches.</p> RESULTS <p>Defined phylogenetically, the S. recurvum complex includes S. angustifolium , S. fallax , S. flexuosum , S. pacificum , and S. recurvum , as distinct clades with little evidence of admixture within them. In addition, we resolved another clade, sister to either S. pacificum or S. fallax , that is currently unnamed and is referred to in this paper as S. "pseudopacificum." We confirm that S. balticum , a species not generally included in the S. recurvum complex, and S. obtusum , never associated with the complex by previous authors, are nested within it among the core species. Species with geographic ranges that span Europe, eastern North America, and Western North America exhibit a sister-group relationship between amphi-Atlantic and Pacific clades. European plants within S. flexuosum form a clade that is nested within a paraphyletic group of eastern North American plants; this species does not occur in western North America.</p> CONCLUSIONS <p>We recognize seven species in the amended S. recurvum complex, including S. balticum and S. obtusum , in addition to the informal clade, S. "pseudopacificum". Although we detected some geographically-correlated phylogenetic structure within widespread morphospecies, our RADseq data support the interpretation that these species have intercontinental geographic ranges. Please be aware that if you ask to have your user record removed, we will retain your name in the records concerning manuscripts for which you were an author, reviewer, or editor. In compliance with data protection regulations, you may request that we remove your personal registration details at any time. (Use the following URL: https://www.editorialmanager.com/ajb/login.asp?a=r). Please contact the publication office if you have any questions.</p>
Data from: Phylogenetic structure in the Sphagnum recurvum complex (Bryophyta: Sphagnaceae) relative to taxonomy and geography
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Data from: Genetic structure of the Sphagnum magellanicum (Sphagnaceae) complex in Europe
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Data from: Genetic analysis of the peatmoss Sphagnum cribrosum (Sphagnaceae) indicates independent origins of an extreme infra-specific morphology shift
Within Sphagnum cribrosum, a dioicous aquatic peatmoss, a unique morphological variant (the "waveform"), found at only two lakes in North Carolina, has a branching architecture that is extremely differentiated from anything otherwise known in Sphagnum, though the plants are microscopically indistinguishable from S. cribrosum. At one site where the two morphologies co-occur, sixty years of field observations demonstrate the persistence of each morphology, even where the two forms grow intermixed. We conducted a reciprocal transplant experiment in which waveform and normal plants maintained their divergent morphologies for eight months. We sampled populations throughout the range and conducted genetic and phylogenetic analyses with microsatellite markers and DNA sequences to investigate the genetic context of the waveform morphology within S. cribrosum. Haplotype networks from DNA sequences showed the two waveform populations are separated by 11 substitutions across three loci. Microsatellite analyses using non-parametric clustering and admixture models also indicated genetic dissimilarity between genotypes with waveform morphology at the two lakes. Both molecular datasets suggest that the waveform morphology had at least two independent origins despite proximity of the two lakes where it uniquely occurs. Given the clonal nature of the waveform, it is unlikely to form a cohesive evolutionary lineage deserving of taxonomic status. The analysis also revealed a genetically diverse population in Georgia as the potential source of variation found in all other populations of S. cribrosum.
Molecular data of Sphagnum majus ssp. majus and ssp. norvegicum (Bryophyta: Sphagnaceae) relative to taxonomy and geography
<p><span>Species delimitation is problematic in many plant groups and among the mosses, <em>Sphagnum</em> is one of the more contentious genera because of high levels of morphological variation. The allopolyploid species, <em>Sphagnum majus</em>, comprises one such problematic complex. Two morphologically differentiated but overlapping subspecies have been described. We conducted morphometric and molecular analyses with samples from around the Northern Hemisphere to test for phenotypic and phylogenetic differentiation between the subspecies. Although field collections of the two species can be statistically differentiated morphologically, there is substantial overlap. Genome-scale molecular data do not suggest any differentiation between <em>S. majus </em>ssp<em>. majus</em> and ssp.<em> norvegicum</em>, including samples assigned to the two taxa from sympatric sites. Sequence data from the plastid genome were employed to infer parentage of allopolyploid <em>S. majus</em>. Our results support the hypothesis that <em>S. annulatum</em> is the paternal parent and <em>S. cuspidatum</em> is the maternal parent. We conclude that the morphological differences between them are either plastic responses to habitat heterogeneity or segregating genetic variation within a single taxon. Formal taxonomic recognition of two taxa is not supported by our molecular data.</span></p>
FIGURE 1 in New synonyms for Brazilian Sphagnaceae, Subgenus Acutifolia (Bryophyta)
FIGURE 1. Sphagnum aciphyllum Müll. Hal. A. Fascicle. B. Stem leaves. C. Branch leaves. D. Cells of branch leaf outer surface. E. Cells of branch leaf inner surface. F. Section of branch leaf (A–C based on E. Ule 9, PC and D–F based on J.-P. Frahm 1834, MICH). Sphagnum capillifolium (Ehrh.) Hedw. G. Stem leaf. H. Branch leaves. I. Cells of branch leaf outer surface. J. Cells of branch leaf inner surface. K. Section of branch leaf. L. Fascicle (G–L based on J.A. Steyermark 103911, NY). lllustrations by Maria Alice de Rezende.
FIGURE 9 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 9 (part 1). Microscopic pictures of different morphological characters in Sphagnum incundum. A: Stem leaf shapes, B: Stem leaves distal part, C: Stem in transverse sect., D: Stem cortex in superficial view, E: Leaves from middle part of divergent branches, F: Pendent branch leaf, G: Branch leaves in transverse sect., H: Retort cell of branch cortex in superficial view, I: Branch in transverse sect., J–L: Cell structure on convex surface of divergent branch leaves.–J: Distal end portions.–K: Mid-median portion.–L: Proximal end portion. Material (TRH): A: B-9998, 9981, 9718, 693715, B: B-9981, 9998, C: B-38507, D: B-9987, E: B-9998, 9718, F–I: B-9718, J: B-38515, K–L: B-9981.
FIGURE 8 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 8. Sphagnum incundum in field surface view. A: The type collection including selected holotype and isotypes. Collected in Ivujivik, Quebec, Canada, in intermediate, slightly sloping arctic fen. Photo by K. I. Flatberg, 4 July 2007. Flatberg 314-07 (TRH B-9718). B: Together with S. squarrosum, both with young sporophytes. From Inukjuak, Quebec, Canada, in topogenous, rich fen lawn in arctic mire. Photo by K. I. Flatberg, 14 August 2007. Flatberg 451-07 (TRH B-9999).
FIGURE 7 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 7 The histograms show the nuclear integrated density values (IOD) of Sphagnum incundum (A) and S. warnstorii (B, with ploidy level known to be haploid). T = nuclei in telophase (1C), P = nuclei in prophase (2C).
FIGURE 6 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 6. Hyalocyst shapes and pore structure on distal end convex surface of divergent branch leaves (above) and stem leaves (below) in the Sphagnum subnitens complex. A,E: S. flavicomans (TRH B-727084). B,F: S. incundum (TRH B-9718). C,G: S. subfulvum (TRH B-158979). D,H. S. subnitens (TRH B-155847).
FIGURE 4 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 4. ML reconstruction of phylogenetic relationships among Acutifolia species based on the plastid gene trnG and trnL. Maximum likelihood support are shown above branches.
FIGURE 5 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 5. Stem (left) and branch leaf (right) shapes in the Sphagnum subnitens complex. A: S. flavicomans (TRH B-727084). B: S. incundum (TRH B-9718). C: S. subfulvum (TRH B-158979). D. S. subnitens (TRH B-155847).
FIGURE 2 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 2. Haplotype network constructed in SPLITSTREE4 based on genetic distances calculated between all specimens using microsatellite data. The network shows that the four species in the S. subnitens complex are separated into individual branches. The five haplotypes recognized in S. incundum are highlighted in different colors. The number of individuals for each haplotype are given in the circles and the sizes of the circles corresponds to sample size. The geographical location are given for each haplotype of S. incundum.
FIGURE 1. STRUCTURE analysis using microsatellite data shows that Sphagnum incundum form a separate genetic group from S. subnitens and S in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 1. STRUCTURE analysis using microsatellite data shows that Sphagnum incundum form a separate genetic group from S. subnitens and S. subfulvum. Sphagnum flavicomans seems to be a mixture of the recognized genetic groups. The upper panel shows data separated in two genetic groups, the middel panel shows the data separated in three genetic groups, and the lower one show the data separated in four genetic groups.
FIGURE 3 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 3. ML reconstruction of phylogenetic relationships among Acutifolia species based on the nuclear gene atgc89. Maximum likelihood support are shown above branches.
FIGURE 9 in Sphagnum incundum a new species in Sphagnum subg. Acutifolia (Sphagnaceae) from boreal and arctic regions of North America
FIGURE 9 (part 2). M–N: cell structure on concave surface of divergent branch leaves.–M: Middle portion.–N: Proximal end portion, O: Distal end convex surface of divergent branch leaf with one circular, ringed, perfect and free-lying hyalocyst pore, P: Perigonial leaf from male plant, Q: Perichaetial leaf, R: Spores. Material (TRH): M–N: B-9998, O: B-9987, P: B-9983, Q–R: B-9986.
Data from: Genetic diversity, sexual condition, and microhabitat preference determine mating patterns in Sphagnum (Sphagnaceae) peat-mosses.
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Data from: Genetic analysis of the peatmoss Sphagnum cribrosum (Sphagnaceae) indicates independent origins of an extreme infra-specific morphology shift
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