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125 results for “sedges”
Data from: Systematics of the giant sedges of Carex sect. Rhynchocystis (Cyperaceae) in Macaronesia with description of two new species
<p>Populations of <i>Carex </i>sect.<i> Rhynchocystis</i> (Cyperaceae) from the Macaronesian archipelagos (Azores and Madeira) have traditionally been treated either as a variety of the widely distributed Western Palearctic <i>C. pendula</i>, or directly synonymized under it. However, recent phylogenetic studies have shown that Azorean populations of <i>C. pendula</i> display a certain degree of differentiation from mainland plants, while the phylogenetic relationships of Madeiran populations remain unclear. Here we perform an integrated systematic study focused on the Macaronesian populations of <i>Carex</i> sect. <i>Rhynchocystis</i> to elucidate their phylogenetic relationships and taxonomic status. We reconstructed a molecular phylogeny based on five DNA regions and conducted a multivariate morphological analysis. Divergence time estimates show that the Macaronesian populations can be traced back to a Plio-Pleistocene origin. Our results suggest that these island populations of <i>C. pendula</i> are better treated as two distinct species within <i>Carex </i>sect. <i>Rhynchocystis</i> (i.e., <i>C. leviosa</i> from the Azores and <i>C. sequeirae</i><i> </i>from Madeira). We provide morphological characters to differentiate the new species from <i>C. pendula</i> s.str., detailed descriptions of the three taxa, a revised key for the entire section, as well as detailed analytical drawings of the two newly described species. We also perform a critical evaluation of the taxonomic diversity of <i>Carex</i> in the Azores and Madeira. Finally, we assessed the conservation status of the new species at a global scale under IUCN categories and criteria, resulting in the proposal of the categories "Least Concern" for <i>C. leviosa</i> and "Critically Endangered" for <i>C. sequeirae</i></p>
Supplementary material 2 from: Morales-Alonso A, Villaverde T, Jiménez-Mejías P (2023) Geometric Morphometrics sheds light on the systematics affinities of two enigmatic dwarf Neotropical sedges (Carex, Cyperaceae). PhytoKeys 232: 167-187. https://doi.org/10.3897/phytokeys.232.100410
Utricle slide with landmarks; PCA plot with C. macrosolen; Consensus configurations; Group comparison
Data from: Plant-herbivore interactions: silicon concentration in tussock sedges and population dynamics of root voles
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Data from: Chromosomes tell half of the story: the correlation between karyotype rearrangements and genetic diversity in sedges, a group with holocentric chromosomes
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Data from: Systematics of the giant sedges of Carex sect. Rhynchocystis (Cyperaceae) in Macaronesia with description of two new species
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Data from: Extreme MHC class I diversity in the sedge warbler (Acrocephalus schoenobaenus); selection patterns and allelic divergence suggest that different genes have different functions
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Data from: Microhabitat differences impact phylogeographic concordance of co-distributed species: genomic evidence in montane sedges (Carex L.) from the Rocky Mountains
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Data from: Using supermatrices for phylogenetic inquiry: an example using the sedges
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Data from: Age-related parasite load and longevity patterns in the sedge warbler Acrocephalus schoenobaenus
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Plant herbivore interactions: Combined effect of ground water level, root vole grazing and sedge silicification
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A new remarkable dwarf sedge (Carex phylloscirpoid, Cyperaceae) from Northern Chile, with insights on the evolution of Austral section Racemosae
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Data from: Contrasting patterns of clonality and fine-scale genetic structure in two rare sedges with differing geographic distributions
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Testing which axes of species differentiation underlie covariance of phylogeographic similarity among montane sedge species
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Data from: Contrasting support for alternative models of genomic variation based on microhabitat preference: species-specific effects of climate change in alpine sedges
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Data from: Potentially peat-forming biomass of fen sedges increases with increasing nutrient levels
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A chromosome-scale genome assembly resource for Myriosclerotinia sulcatula infecting sedge grass (Carex sp.)
<p>The fungus <em>Myriosclerotinia sulcatula</em> is a close relative of the notorious polyphagous plant pathogens <em>Botrytis cinerea</em> and <em>Sclerotinia sclerotiorum</em> but exhibits a host range restricted to plants from the <em>Carex</em>genus (<em>Cyperaceae</em> family). To date, there are no genomic resources available for fungi in the <em>Myriosclerotinia</em>genus. Here, we present a chromosome-scale reference genome assembly for <em>M. sulcatula</em>. The assembly contains 24 contigs with a total length of 43.53 Mbp, with scaffold N<sub>50</sub> of 2,649.7 kbp and N<sub>90</sub> of 1,133.1 kbp. BRAKER-predicted gene models were manually curated using WebApollo, resulting in 11,275 protein-coding genes that we functionally annotated. We provide a high-quality reference genome assembly and annotation for <em>M. sulcatula</em> as a resource for studying evolution and pathogenicity in fungi from the <em>Sclerotiniaceae</em> family. </p>
Data from: Negative correlation between dispersal investment and canopy openness among populations of the ant-dispersed sedge, Carex lanceolata
<p><span><span><span><span><span><span><span><span><span><span>Flowering plants</span></span></span></span></span></span></span></span></span></span><span><span><span><span><span><span><span><span><span><span><span> exhibit a wide variation in the resources they invest in dispersal structures (dispersal effort), but the environmental correlates remain unclear in many plants. Canopy openness is predicted to be negatively correlated with dispersal effort, because selective pressures on increased dispersal effort, including host-specific natural enemies and the paucity and/or ephemerality of safe sites, will be more prevalent in shady sites. Here, we tested this prediction using an ant-dispersed sedge, <i>Carex lanceolata</i> (Cyperaceae). By comparing seven populations of <i>C</i>.<i> lanceolata</i> in central Japan, we found a negative correlation between dispersal effort and canopy openness, thus supporting the prediction. A subsequent cafeteria experiment showed that a large species of ant (<i>Formica japonica</i>) with relatively long seed-dispersal distances tended to prefer diaspores with greater dispersal efforts, while smaller ant species with shorter dispersal distances preferred diaspores with lower dispersal efforts. These results correspond with the assumption that greater dispersal efforts result in a greater dispersal ability and indicate that among-site variations in dispersal efforts actually reflect differentiation in seed dispersal strategy rather than a neutral variation. There were more signs of rust infection caused by <i>Puccinia</i> spp., one of the main natural enemies of <i>C</i>.<i> lanceolata</i>, on adult plant leaves in more shady sites. A seedling transplant experiment was also performed and revealed that rust severity in sedge offspring was considerably reduced by the typical seed dispersal distance (ca. 4 m) afforded by the large ant species, <i>F</i>.<i> japonica</i>. The increased rust severity at shady sites, combined with the narrow dispersal ranges of rusts, can partially explain the negative correlation of dispersal effort with canopy openness. These results support the importance of canopy openness as a factor underlying the variations in dispersal effort seen among flowering plants.</span></span></span></span></span></span></span></span></span></span></span></p>
FIGURE 5 in New eriophyoid mites (Acari: Eriophyoidea) from sedges in Poland and supplement description of Eriophyes lentiginosus Mitrofanov, Sharonov et Sekerskaja, 1983
FIGURE 5: Eriophyes lentiginosus nymph: D—dorsal aspect; CN—coxisternum and 3a and c2 setae
FIGURE 23 in New flat mite genera (Acari: Trombidiformes: Tenuipalpidae) associated with Australian sedges (Cyperaceae)
FIGURE 23. Prolixus corruginus Beard, Fan & Walter adult female—dorsum.
FIGURE 7 in New flat mite genera (Acari: Trombidiformes: Tenuipalpidae) associated with Australian sedges (Cyperaceae)
FIGURE 7. Gahniacarus tuberculatus sp. nov. protonymph—dorsal opisthosoma.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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