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342 results for “Jacobaea”
FIGURE 2 in Nuclear ITS/ETS sequence data indicate the membership of Senecio racemulifer, but not S. acutipinnus and S. graciliflorus, within the genus Jacobaea (Asteraceae, Senecioneae)
FIGURE 2. Selected specimens of Senecio racemulifer (= Jacobaea racemulifera) from Wuqia county in Xinjiang, China. A, B. Northwest Inst. Bot. Xinjiang Exped. 1726 (WUK). C, D. H.M. Li & Y.P. Zeng 599 (IBSC).
FIGURE 4 in Taxonomic and nomenclatural notes on Jacobaea othonnae (Asteraceae- Senecioneae-Senecioninae)
FIGURE 4. Detail of the inflorescence: A. Jacobaea othonnae subsp. adamsii; B. Jacobaea othonnae subsp. anomala.
Fig. 5 in Genetic and chemical diversity of the toxic herb Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.) in Northern Germany
Fig. 5. Principal co-ordinate analysis (PCoA) ordination of the genetic similarity of 75 individuals of J. vulgaris from Northern Germany. Coordinate 1 explains 29.47% of the shown variability and coordinate 2 explains 10.00% of the shown variability. Colours indicate membership to the different populations.
Fig. 3 in Genetic and chemical diversity of the toxic herb Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.) in Northern Germany
Fig. 3. PA content and composition of J. vulgaris. A) Averaged PA content in mg/kg dry weight of the individuals per population (± SEM). At first total PA content of every individual was calculated and afterwards the mean content of all individuals per population. Significant differences to the total averaged PA content (dotted line) are indicated by *. B) PA diversity of the populations shown by mean numbers of different PAs detected in populations (± SEM). Significant differences to the total averaged number of PA (dotted line) are indicated by *. C) Categorisation of J. vulgaris chemotypes: Difference in relative abundance of erucifoline and jacobine per population. Bars below 0 indicate jacobine type and bars over 0 indicate erucifoline type populations. *p <0.05, **p <0.01, ***p <0.001.
Data from: Ecological differentiation, lack of hybrids involving diploids, and asymmetric gene flow between polyploids in narrow contact zones of Senecio carniolicus (syn. Jacobaea carniolica, Asteraceae)
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Data from: Distance-dependent aposematism and camouflage in the cinnabar moth caterpillar (Tyria jacobaeae Erebidae)
Defended prey often use distinctive, conspicuous, colours to advertise their unprofitability to potential predators (aposematism). These warning signals are frequently made up of salient, high contrast, stripes which have been hypothesised to increase the speed and accuracy of predator avoidance learning. Limitations in predator visual acuity, however, mean that these patterns cannot be resolved when viewed from a distance, and adjacent patches of colour will blend together (pattern blending). We investigated how saliency changes at different viewing distances in the toxic and brightly coloured cinnabar moth caterpillar (Tyria jacobaeae). We found that although the caterpillars' orange-and-black stripes are highly salient at close-range, when viewed from a distance the colours blend together to match closely those of the background. Cinnabar caterpillars therefore produce a distance-dependent signal combining salient aposematism with targeted background matching camouflage, without necessarily compromising the size or saturation of their aposematic signal.
FIGURE 5 in Molecular and cytogenetic confirmation of the hybrid origin of Jacobaea ×mirabilis (Asteraceae, Senecioneae), with nomenclatural notes on this name
FIGURE 5. Lectotype (A), isolectotype (B), and syntype (C) of Jacobaea ×mirabilis.
FIGURE 1 in Nuclear ITS/ETS sequence data indicate the membership of Senecio racemulifer, but not S. acutipinnus and S. graciliflorus, within the genus Jacobaea (Asteraceae, Senecioneae)
FIGURE 1. Isotype sheet of Senecio racemulifer (= Jacobaea racemulifera) kept at MW.
FIGURE 2 in Taxonomic and nomenclatural notes on Jacobaea othonnae (Asteraceae- Senecioneae-Senecioninae)
FIGURE 2. Label of the lectotype of Senecio rariflorus K. Koch (P03729654).
Fig. 4. Key NOESY correlations for seneciojanine B-D in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 4. Key NOESY correlations for seneciojanine B-D (2–4).
Fig. 8 in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 8. ECD calculations for enantiomers of millingtojanine A-B (5–6).
Fig. 3. X in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 3. X-ray crystal ORTEP drawing of seneciojanine A (1).
Fig. 7. X in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 7. X-ray crystal ORTEP drawing of the millingtojanine A (5).
Fig. 5. ECD calculations for seneciojanine A-D in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 5. ECD calculations for seneciojanine A-D (1–4).
Fig. 6. Key 2D in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 6. Key 2D NMR drawings of alkaloids millingtojanine A-B (5–6).
Fig. 1 in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 1. Structures of compounds 1–6.
Fig. 2. Key 2D in Pyrrolizidine alkaloids and unusual millingtojanine A-B from Jacobaea vulgaris (syn. Senecio jacobaea L.)
Fig. 2. Key 2D NMR drawings of seneciojanine A (1).
Fig. 2 in Genetic and chemical diversity of the toxic herb Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.) in Northern Germany
Fig. 2. Structural formula of the 6 most abundant PAs in this study.
Fig. 1 in Genetic and chemical diversity of the toxic herb Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.) in Northern Germany
Fig. 1. Geographic distribution of the collection sites of J. vulgaris populations.
Data from: Distance-dependent aposematism and camouflage in the cinnabar moth caterpillar (Tyria jacobaeae Erebidae)
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