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133
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ShareScore release 0.9.0
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133 results for “Cactus”
Laser Desorption Low-Temperature Plasma Mass Spectrometry Imaging (LD-LTP MSI) of San Pedro cactus
<p>Mass spectrometry imaging (MSI) data set in imzML format, obtained from San Pedro cactus (<em>Echinopsis pachanoi</em>) cross-section using Laser Desorption Low-Temperature Plasma ionization. Mapping the ion that corresponds to mescaline shows a star-like distribution of this interesting alkaloid.</p> <p>The experiment is described in:</p> <p>Elucidating the Distribution of Plant Metabolites from Native Tissues with Laser Desorption Low-Temperature Plasma Mass Spectrometry Imaging, Abigail Moreno-Pedraza, Ignacio Rosas-Román, Nancy Shyrley Garcia-Rojas, Héctor Guillén-Alonso, Cesaré Ovando-Vázquez, David Díaz-Ramírez, Jessica Cuevas-Contreras, Fredd Vergara, Nayelli Marsch-Martínez, Jorge Molina-Torres, and Robert Winkler, Analytical Chemistry <strong>2019</strong> <em>91</em> (4), 2734-2743</p> <p>DOI: 10.1021/acs.analchem.8b04406</p> <p> </p>
Failure without tears: Two-step attachment in a climbing cactus
<p>Climbing plants can be extremely adaptable to diverse habitats and capable of colonizing perturbed, unstructured and even moving environments. The timing of the attachment process, whether instantaneous (e.g., a pre-formed hook) or slow (growth process) crucially depends on the environmental context and the evolutionary history of the group concerned. We observed how spines and adhesive roots develop and tested their mechanical strength in the climbing cactus <em>Selenicereus setaceus</em> (Cactaceae) in its natural habitat. Spines are formed on the edges of the triangular cross section of the climbing stem and originate in soft axillary buds (areoles). Roots are formed in the inner hard core of the stem (wood cylinder) and grow via tunnelling through soft tissue, emerging from the outer skin. We measured maximal spine strength and root strength via simple tensile tests using a field measuring Instron device. Spine and root strengths differ, and this has a biological significance for the support of the stem. Our measurements indicate that the measured mean strength of a single spine could theoretically support an average force of 2.8 N. This corresponds to an equivalent stem length of 2.62 m (mass of 285 g). The measured mean strength of root could theoretically support an average of 13.71 N. This corresponds to a stem length of 12.91 m (mass of 1398 g). We introduce the notion of two-step attachment in climbing plants. In this cactus, the first step deploys hooks to attach to a substrate; this process is instantaneous and is highly adapted for moving environments. The second step involves root growth for more solid attachment to the substrate; this process involves “slow” root growth and adhesion. The advantage of the two-step strategy is that fast hook attachment can steady the plant for the slower root attachment. This strategy is effective in highly variable and heterogeneous environments when climbing plants are faced with constant moving and perturbed environmental conditions in many ecosystems. We discuss how two-step mechanisms are of interest for technical anchoring applications particularly for “soft-bodied” artefacts, which have to deploy hard and stiff materials originating from a soft compliant body and where tasks involving attachment take place in highly unstable and unpredictable environments.</p>
Saguaro cactus within-species phylogenomics
<p>Reconstructing accurate historical relationships between populations within a species poses numerous challenges, not least in many plant groups in which gene flow can extend well beyond species boundaries. Nonetheless, the extent of tree-like history within a species is an empirical question on which it is now possible to bring large amounts of genome sequence to bear. We assess phylogenetic structure across the geographic range of the saguaro cactus, an emblematic member of Cactaceae, a clade known for extensive hybridization and porous species boundaries. Using 200 Gb of whole genome resequencing data from 20 individuals sampled from 10 localities, we assembled two data sets comprising 150,000 biallelic single nucleotide polymorphisms (SNPs) from protein coding sequences. From these we infer a population tree and evaluate its significance and robustness using five qualitatively different inference methods. Despite the low sequence diversity, large census population sizes, and presence of wide-ranging pollen and seed dispersal agents, population trees were well resolved and highly consistent across both data sets and all methods. We inferred that the most likely root, based on marginal likelihood comparisons, is to the east and south of the region of highest genetic diversity, which lies along the coast of the Gulf of California. Together with striking decreases in marginal likelihood found to the north, this supports hypotheses that saguaro's current range reflects post-glacial expansion from the far south following retreat to refugia there. We conclude with observations about practical and theoretical issues raised by phylogenomic data sets within species, in which SNP-based methods must be used rather than gene tree methods that are widely used when sequence divergence is higher. These include computational scalability, inference of gene flow, and proper assessment of statistical support in the presence of linkage effects.</p>
Figure 5 in Germination responses of the invasive hedge cactus (Cereus uruguoyonus) to environmental factors
Figure 5. Seed survival of two Cereus uruguoyonus accessions under controlled aging at 60% relative humidity and 45 C. Parameter estimates for the negative logistic regression model fit to the data are given in Table 1.
Figure 2 in Germination responses of the invasive hedge cactus (Cereus uruguoyonus) to environmental factors
Figure 2. Effect of salt stress on the cumulative germination of four seed accessions of Cereus uruguoyonus. Values with the same letter do not differ at a 5% level of significance.
Figure 3 in Germination responses of the invasive hedge cactus (Cereus uruguoyonus) to environmental factors
Figure 3. Effect of water stress on the cumulative germination of four seed accessions of Cereus uruguoyonus. Values with the same letter do not differ at a 5% level of significance.
Dataset: Cactus Acquisition Corp. 1 Limited (CCTSW) Stock Performance
This dataset provides historical stock market performance data for specific companies. It enables users to analyze and understand the past trends and fluctuations in stock prices over time. This information can be utilized for various purposes such as investment analysis, financial research, and market trend forecasting.
Dataset: Cactus Acquisition Corp. 1 Limited (CCTSU) Stock Performance
This dataset provides historical stock market performance data for specific companies. It enables users to analyze and understand the past trends and fluctuations in stock prices over time. This information can be utilized for various purposes such as investment analysis, financial research, and market trend forecasting.
Dataset: Cactus Acquisition Corp. 1 Limited (CCTS) Stock Performance
This dataset provides historical stock market performance data for specific companies. It enables users to analyze and understand the past trends and fluctuations in stock prices over time. This information can be utilized for various purposes such as investment analysis, financial research, and market trend forecasting.
Fig. 1 in Anoxia-conditioning hormesis alters the relationship between irradiation doses for survival and sterility in the cactus moth, Cactoblastis cactorum (Lepidoptera: Pyralidae)
Fig. 1. Fertility (as measured by egg hatch success and time to hatch) of Cactoblastis cactorum treated as adults at 5 levels of irradiation and 2 levels of atmospheric conditions. Means and standard errors are plotted. Letter designations refer to Tukey's post hoc analysis.
Fig. 4 in Anoxia-conditioning hormesis alters the relationship between irradiation doses for survival and sterility in the cactus moth, Cactoblastis cactorum (Lepidoptera: Pyralidae)
Fig. 4. Median longevity (median ± SE) of untreated control (no irradiation or atmospheric treatment) female and male Cactoblastis cactorum adults housed in 3 different conditions; individually in restrictive cups, together in single gen- der cages that allowed movement, and together in mixed gender cages that allowed movement and mating. Letter designations refer to Tukey's post hoc analysis.
Fig. 6 in Anoxia-conditioning hormesis alters the relationship between irradiation doses for survival and sterility in the cactus moth, Cactoblastis cactorum (Lepidoptera: Pyralidae)
Fig. 6. Median longevity (median ± SE) of female and male Cactoblastis cactorum adults treated at 5 levels of irradiation and 2 levels of atmospheric conditions. Asterisks refer to significant differences at the 0.0001 level.
Fig. 3 in Anoxia-conditioning hormesis alters the relationship between irradiation doses for survival and sterility in the cactus moth, Cactoblastis cactorum (Lepidoptera: Pyralidae)
Fig. 3. Success rate (mean ± SE) of neonate Cactoblastis cactorum at building communal webs in the absence of food and water whose parents had been treated at 5 levels of irradiation and 2 levels of atmospheric conditions.
Fig. 5 in Anoxia-conditioning hormesis alters the relationship between irradiation doses for survival and sterility in the cactus moth, Cactoblastis cactorum (Lepidoptera: Pyralidae)
Fig. 5. Survivorship and longevity (mean ± SE) of female and male Cactoblastis cactorum adults treated at 5 levels of irradiation and 2 levels of atmospheric conditions.
Fig. 3 in Performance improvement through quality evaluations of sterile cactus moths, Cactoblastis cactorum (Lepidoptera: Pyralidae), mass-reared at two insectaries
Fig. 3. The mean percentage increase in mating of Cactoblastis cactorum females in mating cage bioassays as influenced by the insectary (DPI or TIF) and the trial conducted before (trial 1) and afer (trial 2) quality improvements were made to the rearing and handling protocols at the DPI insectary. Vertical bars denote 0.95 confidence intervals.
Fig. 6 in Performance improvement through quality evaluations of sterile cactus moths, Cactoblastis cactorum (Lepidoptera: Pyralidae), mass-reared at two insectaries
Fig. 6. The mean distance (m) from the field release site that Cactoblastis cactorum males were recaptured was significantly influenced by the insectary (DPI or TIF), the day that released males were recaptured, and the trial conducted before (trial 1) and afer (trial 2) quality improvements were made to the rearing and handling protocols at the DPI insectary. Vertical bars denote 0.95 confidence intervals.
Fig. 2 in Performance improvement through quality evaluations of sterile cactus moths, Cactoblastis cactorum (Lepidoptera: Pyralidae), mass-reared at two insectaries
Fig. 2. The mean percentage of Cactoblastis cactorum females that were mated at time of collection from the insectaries (DPI or TIF) and the trial conducted before (trial 1) and afer (trial 2) quality improvements were made to the rearing and handling protocols at the DPI insectary. Vertical bars denote 0.95 confidence intervals.
Fig. 5 in Performance improvement through quality evaluations of sterile cactus moths, Cactoblastis cactorum (Lepidoptera: Pyralidae), mass-reared at two insectaries
Fig. 5. The relationship between the mean percentage recapture of Cactoblastis cactorum males released in the field as influenced by the day that released males were recaptured. Males recaptured include individuals from both DPI and TIF insectaries. Vertical bars denote 0.95 confidence intervals.
Fig. 4 in Performance improvement through quality evaluations of sterile cactus moths, Cactoblastis cactorum (Lepidoptera: Pyralidae), mass-reared at two insectaries
Fig. 4. The mean percentage recapture of Cactoblastis cactorum males released in the field as influenced by the insectary (DPI or TIF) and the trial conducted before (trial 1) and afer (trial 2) quality improvements were made to the rearing and handling protocols at the DPI insectary. Vertical bars denote 0.95 confidence intervals.
Fig. 1 in Natural egg parasitism by Scelionidae on a Phycitine cactus moth in Mexico
Fig. 1. (A) Melitara cf. junctolineella egg stick on cactus pad spine, visible towards the center of the pad (arrow); (B) Melitara cf. junctolineella egg stick with emergence hole of parasitic scelionid wasps; (C) non-parasitized Melitara cf. junctolineella egg stick with larval emergence holes; (D) adult scelionid wasp that emerged from Melitara cf. junctolineella egg stick.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.