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Dataset results
82 results for “Dandelion”
Krigia dandelion (Asteraceae) - fruit - as borne on the plant
Image of Krigia dandelion (Asteraceae) - fruit - as borne on the plant
Krigia dandelion (Asteraceae) - inflorescence - ventral view of flower + perianth
Image of Krigia dandelion (Asteraceae) - inflorescence - ventral view of flower + perianth
Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Image of Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Krigia dandelion (Asteraceae) - whole plant - in flower - general view
Image of Krigia dandelion (Asteraceae) - whole plant - in flower - general view
Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Image of Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Krigia dandelion (Asteraceae) - stem - showing leaf bases
Image of Krigia dandelion (Asteraceae) - stem - showing leaf bases
Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Image of Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Krigia dandelion (Asteraceae) - whole plant - in flower - general view
Image of Krigia dandelion (Asteraceae) - whole plant - in flower - general view
Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Image of Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Krigia dandelion (Asteraceae) - stem - showing leaf bases
Image of Krigia dandelion (Asteraceae) - stem - showing leaf bases
Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Image of Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Environmental morphing enables informed dispersal of the dandelion diaspore
<p>This repository contains source data for the following preprint: </p> <p>Seale M, Zhdanov O, Soons MB, Cummins C, Kroll E, Blatt MR, Zare-Behtash H, Busse A, Mastropaolo E, Bullock JM, Viola IM, Nakayama N (2022) Environmental morphing enables informed dispersal of the dandelion diaspore, bioRxiv, https://doi.org/10.1101/542696</p> <p> </p> <p> </p>
Linked collectors and determiners for: First record in British Columbia for the dandelion gall wasp, Phanacis taraxaci (Ashmead) (Hymenoptera: Cynipidae, Phanacidini).
Natural history specimen data linked to collectors and determiners held within, "First record in British Columbia for the dandelion gall wasp, Phanacis taraxaci (Ashmead) (Hymenoptera: Cynipidae, Phanacidini)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/246546ff-2c80-4f7c-b135-353805a5ae3a">https://bionomia.net/dataset/246546ff-2c80-4f7c-b135-353805a5ae3a</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/246546ff-2c80-4f7c-b135-353805a5ae3a">https://gbif.org/dataset/246546ff-2c80-4f7c-b135-353805a5ae3a</a>. Formatted as a Frictionless Data package.
Dandelion pappus morphing is actuated by radially patterned material swelling
<p>The dandelion pappus opens and closes reversibly to tune seed dispersal according to environmental moisture levels.</p> <p>In the Nature Communications paper "<em>Madeleine Seale, Annamaria Kiss, Simone Bovio, Ignazio Maria Viola, Enrico Mastropaolo, Arezki Boudaoud, Naomi Nakayama</em>, <strong>Dandelion pappus morphing is actuated by radially patterned material swelling</strong>, https://doi.org/10.1038/s41467-022-30245-3 the authors combined experiments with a computational model to show that pappus closure is coordinated by radially-patterned tissue swelling at the base of floral organs.</p> <p>This repository contains the source data for the paper.</p>
Dandelion and vole interaction
Open the record for dataset details and reuse information.
Data from: Detecting small-scale genotype-environment interactions in apomictic dandelion (Taraxacum officinale) populations
Studies of genotype × environment interactions (G×E) and local adaptation provide critical tests of natural selection's ability to counter opposing forces such as gene flow. Such studies may be greatly facilitated in asexual species, given the possibility for experimental replication at the level of true genotypes (rather than populations) and the possibility of using molecular markers to assess genotype-environment associations in the field (neither of which is possible for most sexual species). Here we tested for G×E in asexual dandelions (Taraxacum officinale) by subjecting six genotypes to experimental drought, mown, and benign (control) conditions, and subsequently using microsatellites to assess genotype-environment associations in the field. We found strong G×E, with genotypes that performed poorly under benign conditions showing the highest performance under stressful conditions (drought or mown). Our six focal genotypes comprise >80% of plants in local populations. The most common genotype in the field showed its highest relative performance under mown conditions (the most common habitat in our study area), and almost all plants of this genotype in the field were found growing in mowed lawns. Genotypes performing best under benign experimental conditions were found most frequently in unmown conditions in the field. These results are strongly indicative of local adaptation at a very small scale, with unmown microsites of only a few square meters typically embedded within larger mown lawns. By studying an asexual species we were able to map genotypes with known ecological characteristics to environments with high spatial precision.
Data from: Increased transgenerational epigenetic variation, but not predictable epigenetic variants, after environmental exposure in two apomictic dandelion lineages
DNA methylation is one of the mechanisms underlying epigenetic modifications. DNA methylations can be environmentally induced and such induced modifications can at times be transmitted to successive generations. However, it remains speculative how common such environmentally induced transgenerational DNA methylation changes are and if they persist for more than one offspring generation. We exposed multiple accessions of two different apomictic dandelion lineages of the Taraxacum officinale group (Taraxacum alatum and T. hemicyclum) to drought and salicylic acid (SA) treatment. Using methylation-sensitive amplified fragment length polymorphism markers (MS-AFLPs) we screened anonymous methylation changes at CCGG restriction sites throughout the genome after stress treatments and assessed the heritability of induced changes for two subsequent unexposed offspring generations. Irrespective of the initial stress treatment, a clear buildup of heritable DNA methylation variation was observed across three generations, indicating a considerable background rate of heritable epimutations. Less evidence was detected for environmental effects. Drought stress showed some evidence for accession-specific methylation changes, but only in the exposed generation and not in their offspring. By contrast, SA treatment caused an increased rate of methylation change in offspring of treated plants. These changes were seemingly undirected resulting in increased transgenerational epigenetic variation between offspring individuals, but not in predictable epigenetic variants. While the functional consequences of these MS-AFLP-detected DNA methylation changes remain to be demonstrated, our study shows that (1) stress-induced transgenerational DNA methylation modification in dandelions is genotype and context-specific; and (2) inherited environmental DNA methylation effects are mostly undirected and not targeted to specific loci.
Data from: Natural epigenetic variation contributes to heritable flowering divergence in a widespread asexual dandelion lineage
Epigenetic variation has been proposed to contribute to the success of asexual plants, either as a contributor to phenotypic plasticity or by enabling transient adaptation via selection on transgenerationally stable, but reversible, epialleles. While recent studies in experimental plant populations have shown the potential for epigenetic mechanisms to contribute to adaptive phenotypes, it remains unknown whether heritable variation in ecologically relevant traits is at least partially epigenetically determined in natural populations. Here, we tested the hypothesis that DNA methylation variation contributes to heritable differences in flowering time within a single widespread apomictic clonal lineage of the common dandelion (Taraxacum officinale s. lat.). Apomictic clone members of the same apomictic lineage collected from different field sites showed heritable differences in flowering time, which was correlated with inherited differences in methylation-sensitive AFLP marker profiles. Differences in flowering between apomictic clone members were significantly reduced after in vivo demethylation using the DNA methyltransferase inhibitor zebularine. This synchronization of flowering times suggests that flowering time divergence within an apomictic lineage was mediated by differences in DNA methylation. While the underlying basis of the methylation polymorphism at functional flowering time-affecting loci remains to be demonstrated, our study shows that epigenetic variation contributes to heritable phenotypic divergence in ecologically relevant traits in natural plant populations. This result also suggests that epigenetic mechanisms can facilitate adaptive divergence within genetically uniform asexual lineages.
Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Image of Krigia dandelion (Asteraceae) - leaf - basal or on lower stem
Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
Image of Krigia dandelion (Asteraceae) - inflorescence - whole - unspecified
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