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133 results for “Cactus”
FIGURES 4–7 in A member of the Telenomus californicus Ashmead, 1893 complex parasitizing native cactus moth (Lepidoptera: Pyralidae) eggs in Mexico
FIGURES 4–7. Telenomus sp. (FSCA 00034157) 4 ventral head, anterolateral view 5 head, anterior view 6 mouthparts, ventral view 7 head, dorsolateral view.
FIGURES 8–12 in A member of the Telenomus californicus Ashmead, 1893 complex parasitizing native cactus moth (Lepidoptera: Pyralidae) eggs in Mexico
FIGURES 8–12. Telenomus sp. (FSCA 00034157) 8 lateral habitus 9 head and mesosoma, dorsolateral view 10 head and mesosoma, dorsal view 11 mesosoma, posterolateral view 12 metasoma, dorsolateral view, msct: metascutellum; ss: sublateral setae.
Data from: Population genetic structure of the giant cactus Echinopsis terscheckii in northwestern Argentina is shaped by patterns of vegetation cover
Species inhabiting drylands commonly depend on the surrounding vegetation for recruitment under stress, while competition may affect populations in moister environments. Our objective was to analyze how different climates and vegetation affect the fine-scale spatial genetic structure (SGS) of the columnar cactus Echinopsis terscheckii. At four sites we estimated vegetation cover by digitized patches and the normalized difference vegetation index (NDVI). We mapped 30 individuals per population and collected tissue for isozyme electrophoresis using 15 putative loci. Spatial autocorrelation between all possible genotype pairs and the number of genetically homogeneous groups and families were calculated for each population. Greater cover (66%) and average NDVI values were detected in the most humid habitat that consisted of fewer, larger, and more dispersed vegetation patches. All populations were genetically diverse and showed significant SGS. Positive correlations were found between the distance at which maximum autocorrelation and kinship values were reached and vegetation area and patch size. Also higher NDVI values were associated with lower number of patches. Populations exposed to higher precipitation and vegetation cover consisted of sparse individuals that clustered at larger distances whereas vegetation patches in arid climates produced groups of closely related genotypes at small distances. These results support the stress-gradient genetic hypothesis. Under water stress, facilitation promotes establishment underneath patchy vegetation resulting in fine-scale family structure. In moister xerophilous forests competition for resources, i.e. light, results in sparse individuals and thus coarse-scale neighborhoods. This information can guide conservation and/or restoration efforts, such as the spatial scale to be considered in germplasm collection.
Species complex diversification by host plant use in an herbivorous insect: The source of Puerto Rican cactus mealybug pest and implications for biological control
Cryptic taxa have often been observed in the form of host‐associated species that diverged as the result of adaptation to alternate host plants. Untangling cryptic diversity in species complexes that encompass invasive species is a mandatory task for pest management. Moreover, investigating the evolutionary history of a species complex may help to understand the drivers of their diversification. The mealybug Hypogeococcus pungens was believed to be a polyphagous species from South America and has been reported as a pest devastating native cacti in Puerto Rico, also threatening cactus diversity in the Caribbean and North America. There is neither certainty about the identity of the pest, nor the source population from South America. Recent studies pointed to substantial genetic differentiation among local populations, suggesting that H. pungens is a species complex. In this study, we used a combination of genome-wide SNPs and mtDNA variation to investigate species diversity within H. pungens sensu lato to establish host plant ranges of each one of the putative members of the complex, to evaluate whether the pattern of host plant association drove diversification in the species complex, and to determine the source population of the Puerto Rican cactus pest. Our results suggested that H. pungens comprises at least five different species, each one strongly associated with specific host plants. We also established that the Puerto Rican cactus pest derives from southeastern Brazilian mealybugs. This is an important achievement because it will help to design reliable strategies for biological control using natural enemies of the pest from its native range.
Fig. 1. Columnar cactus Stenocereus pruinosus. A in Flower-Inhabiting Sap Beetles (Coleoptera: Nitidulidae: Carpophilinae) in Guatemala
Fig. 1. Columnar cactus Stenocereus pruinosus. A) Whole view, B) Flower in bloom, a freshly-withered flower, and buds, C) Freshly withered flower (dissected) that was on a tree, D) Faded flower (dissected) fallen on the ground.
Figs. 1–3 in New Ornamental Host Record for the Cactus Weevil,Cactophagus spinolae(Gyllenhal) (Coleoptera: Curculionidae) in Morelos, Mexico
Figs. 1–3. Cactus weevil on Selenicereus hamatus. 1) Larva in fruit; 2) Larva in stem; 3) Adult feeding on stem.
FIGURE 2 in Opuntia leoglossa sp. nov. (Cactaceae): a new identity for the aloctone "Lion's Tongue" cactus
FIGURE 2. Holotype (Sheet 1 of 3) of Opuntia leoglossa (MEL2023597!), housed at MEL. Reproduced with permission from the Royal Botanic Gardens Victoria (National Herbarium of Victoria, MEL).
FIGURE 1 in Opuntia leoglossa sp. nov. (Cactaceae): a new identity for the aloctone "Lion's Tongue" cactus
FIGURE 1. Morphological features of Opuntia leoglossa. A. Plant in habitat B. Detailed aspects of the cladodes C. Cladodes with flower buds and flowers in anthesis D. Detailed aspects of the flowers E. Cladodes with unripe fruits F. Ripe fruits. (Photo acknowledgments: A,B,C,D—© M. Fagg, 2008–2009; E—© R.G. & F.J. Richardson, 2005; F—© R.C.H. Shepherd, 2005).
Assembly and annotation of the saguaro cactus genome – SGP5p v2
<p class="MsoNormal">We present an improved genome assembly of the saguaro cactus (<em>Carnegiea gigantea</em> (Engelm.) Britton & Rose), obtained by incorporating long-read PacBio data to the existing short reads. The assembly improves in terms of total size, contiguity, and accuracy, allowing us to extend the range of sequence analyses beyond the single-gene scale. Consequently, 20% more genes were identified, expanding the resources for a neglected yet very peculiar plant family such as Cactaceae.</p>
Test data for Cactus on Galaxy
<p>Test datasets needed for the Galaxy wrapper for Cactus (https://github.com/ComparativeGenomicsToolkit/cactus/)</p>
CAcTUS - Circulating Tumour DNA Guided Switch
ClinicalTrials.gov study NCT03808441. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Interglacial microrefugia and diversification of a cactus species complex: phylogeography and palaeodistributional reconstructions for Pilosocereus aurisetus and allies
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Data from: Patterns of frugivory in the columnar cactus Pilosocereus leucocephalus
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Data from: Insectivorous bat pollinates columnar cactus more effectively per visit than specialized nectar bat
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Species complex diversification by host plant use in an herbivorous insect: The source of Puerto Rican cactus mealybug pest and implications for biological control
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Data from: Model-based analysis supports interglacial refugia over long-dispersal events in the diversification of two South American cactus species
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Data from: Coexistence and the niche in a nurse-cactus interaction: is cyclic dynamics justified?
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Data from: Population genetic structure of the giant cactus Echinopsis terscheckii in northwestern Argentina is shaped by patterns of vegetation cover
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Assembly and annotation of the saguaro cactus genome – SGP5p v2
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Data from: Habitat fragmentation in coastal southern California disrupts genetic connectivity in the Cactus Wren (Campylorhynchus brunneicapillus)
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