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11 results for “Pieris brassicae”
Figs 1–6 in Nosema pieriae sp. n. (Microsporida, Nosematidae): A New Microsporidian Pathogen of the Cabbage Butterfly Pieris brassicae L. (Lepidoptera: Pieridae)
Figs 1–6. Light micrographs of the microsporidian pathogen infecting P. brassicae. 1 – intestine which is heavily infected with microsporidian spores; 2–3 – microsporidian spores in fresh smears, note that meront and sporoblast stages are easily seen and marked by arrows; 4 – tetranucleate spherical meront (schizont); 5 – binucleate oval meront; 6 – diplokaryotic sporoblast. Scale bars: 30 µm (1), 15–10 µm (2–3), 3 μm (4), 2 μm (5), 4 μm (4).
Fig. 11 in Nosema pieriae sp. n. (Microsporida, Nosematidae): A New Microsporidian Pathogen of the Cabbage Butterfly Pieris brassicae L. (Lepidoptera: Pieridae)
Fig. 11. The phylogenetic analysis was carried out by Maximum Likelihood (ML) using an HKY85 substitution model of PAUP 4.0b10 software. The topology of the consensus tree was constructed and evaluated by 1000 bootstrap replications. The branches with lower than 50% confidence values were ignored.
Figs 7–10 in Nosema pieriae sp. n. (Microsporida, Nosematidae): A New Microsporidian Pathogen of the Cabbage Butterfly Pieris brassicae L. (Lepidoptera: Pieridae)
Figs 7–10. Transmission electron micrographs of microsporidian spores infecting P. brassicae. 7 – longitudinal (a) and transversal (b) sections of diplokaryotic spores, polar filament (pf), posterior vacuole (pv) and nuclei (n) are easily seen; 8 – spherical nuclei (n); 9 – polaroplast (pp) and anchoring disc (ad) structures; pp thin lamellar type polaroplast, pp thick lamellar type polaroplast; 10 – cross section of 1, 2, polar filaments; exospore (ex), endospore (en), plasmalemma (p) and polar filament (pf). Scale bars: 800 nm (7), 250 nm (8), 200 nm (9, 10).
Sphingolipids are involved in Pieris brassicae egg-induced cell death in Arabidopsis thaliana
<p>This table contains mean + SEM values of sphingolipid levels by LC-MS analysis in Arabidopsis thaliana (wild-type and mutant lines) and Brassica nigra (wild-type) in response to egg extract of Pieris brassicae, as well as P-values for selected comparisons by Welsch t-test. These data were used for Fig. 7 and Fig. 8 of Groux et al. 2022</p> <p> </p> <p> </p> <p> </p>
Olfactory learning in Pieris brassicae butterflies is dependent on the intensity of a plant-derived oviposition cue
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Reprotoxic effects of the systemic insecticide fipronil on the butterfly Pieris brassicae
<p></p><p> In addition to controlling pest organisms, the systemic neurotoxic pesticide fipronil can also have adverse effects on beneficial insects and other non-target organisms. Here, we report on the sublethal effects of fipronil on the farmland butterfly Pieris brassicae . Caterpillars were reared on plants that had been grown from seeds coated with fipronil or on leaf discs topically treated with a range of fipronil dosages (1–32 µg kg <sup>−1</sup> on dry mass basis). Females that had developed on fipronil plants laid ca half the number of eggs than females that had developed on control plants. In the bioassay with leaf discs, longevity and lifetime egg production declined with increasing fipronil dosage. Remarkably, exposure to fipronil during larval development primarily affected the adult stage. Chemical analyses of leaf tissues collected from seed-treated plants revealed concentrations of fipronil and its degradation products close to the analytical limit of detection (less than or equal to 1 µg kg <sup>−1</sup> ). The effective dosage was fivefold higher in the leaf-disc than in the whole-plant experiment. In the whole plant, degradation of fipronil to products that are more toxic than fipronil may explain this discrepancy. Neurotoxicity of insecticides at the level of detection decreases the probability of pinpointing insecticides as the causal agent of harmful effects on non-target organisms. </p><p></p>
Reprotoxic effects of the systemic insecticide fipronil on the butterfly Pieris brassicae
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Pieris brassicae geometric morphometric data
<p class="CxSpFirst">By adopting a longitudinal study design and through geometric morphometrics methods, we investigated size and shape regulation in the head capsule during the larval development of the cabbage butterfly <i>Pieris brassicae</i> under laboratory conditions. We found evidence of size regulation by compensatory growth, although not equally effective in all larval stages. Size compensation is not attained through the regulation of developmental timing, but rather through the modulation of per-time growth rate. As for the shape, neither the variance of the symmetric component of shape, nor the level of fluctuating asymmetry show any evidence of increase across stages, either at the population or individual level, which is interpreted as a mark of ontogenetic shape regulation. In addition, also the geometry of individual asymmetry is basically conserved across stages. While providing specific documentation on the ontogeny of size and shape variation in this insect, this study may contribute to a more general understanding of developmental regulation and its influence on phenotypic evolution.</p>
Pieris brassicae geometric morphometric data
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Gene expression in Arabidopsis thaliana leaves after chilling and/or herbivory by Pieris brassicae or Mamestra brassice larvae or after mechanical wounding
GEO Series GSE114211. Arabidopsis thaliana. 30 samples. Type: Expression profiling by array.
Pieris Brassicae (large white)
Specimen: Pieris Brassicae (large white) Object ID: BU51 Photogrammetry scan from The Watt Institution's Lepidoptera collection Source: Objaverse 1.0 / Sketchfab
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