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716 results for “Oenothera”
FIGURE 6. A in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 6. A scatter diagram showing results of discriminant analysis (DA). Holotype of O. perangusta var. rubricalyx (Pr), and the paratype of O. ersteinensis (Er) are marked with empty diamonds and empty circle, respectively.
FIGURE 10 in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 10. Distribution of Oenothera ersteinensis; a—an overview map according to Rostański (Rostański et al. 2010; changed); b—confirmed localities based on the conducted research (full circles indicate the localities based on herbarium specimens examination; empty circles refer to the stands obtained from labels of the scanned individuals).
FIGURE 5. A in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 5. A scatterplot resulting from principal component analysis (PCA). Full diamonds refer to O. biennis specimens and empty triangles to O. oakesiana individuals. Holotypes of O. perangusta (Pe), O. perangusta var. rubricalyx (Pr) and the paratype of O. ersteinensis (Er) are marked with full square, empty diamonds, and empty circle, respectively.
FIGURE 4. A in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 4. A chart presenting factor loadings of principal component analysis (PCA). For characters abbreviations see Table 1.
FIGURE 8 in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 8. Distribution of Oenothera royfraseri in Europe. Circles refer to the examined specimens, squares to localities cited in the literature. The question mark represents a stand given from France by Rostański (with no further details) (Rostański et al. 2010) which has not been traced.
FIGURE 9 in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 9. Comparison of the arrangement of sepal tips at the base of the four examined taxa: a – O. biennis, b – O. parviflora, c – O. royfraseri (the lectotype), d – O. turoviensis (the holotype).
FIGURE 5. A in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 5. A scatterplot resulting from principal component analysis (PCA). Empty triangles refer to O. biennis, empty circles to O. parviflora and empty squares to the individuals labelled as O. royfraseri and/or O. turoviensis (except the original material). The lectotype of O. royfraseri and the holotype and isotypes of O. turovienisis are marked with full circle and full triangles, respectively.
FIGURE 4. A in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 4. A chart presenting factor loadings of principal component analysis (PCA). For characters abbreviations see Table 1.
FIGURE 3 in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 3. Two-dimensional ordination diagram of correspondence analysis (CA) along CA1 and CA2, based on all qualitative characters. Empty triangles refer to O. biennis, empty circles to O. parviflora and empty squares to the individuals labelled as O. royfraseri and/or O. turoviensis (except the original material). The lectotype of O. royfraseri and the holotype and isotypes of O. turovienisis are marked with full circle and full triangles, respectively. The numbers indicate the number of specimens to which a particular point refers to (only if more than one). For characters abbreviations see Table 1.
FIGURE 7. Variability range for the chosen quantitative characters. Points indicate a median value, boxes represent 5 and 95 in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 7. Variability range for the chosen quantitative characters. Points indicate a median value, boxes represent 5 and 95 percentile, whiskers around the boxes refer to 1 and 99 percentile; B – O. biennis, P – O. perangusta, R – O. royfraseri (including the specimens labelled as O. turoviensis, except the original material of the latter), T – O. turoviensis (the original material only).
FIGURE 6. A in A revision of taxonomic relation between Oenothera royfraseri and O. turoviensis (sect. Oenothera, subsect. Oenothera; Onagraceae) based on multivariate analyses of morphological characters
FIGURE 6. A scatter diagram showing results of discriminant analysis (DA). Empty triangles refer to O. biennis, empty circles to O. parviflora and empty squares to the individuals labelled as O. royfraseri and/or O. turoviensis (except the original material). The lectotype of O. royfraseri and the holotype and isotypes of O. turovienisis are marked with full circle and full triangles, respectively.
FIGURE 5 in Lectotypification, epitypification and taxonomic notes on Oenothera fallax (Onagraceae)
FIGURE 5. Red-striped flower buds and large flowers of Oenothera fallax Renner (phot. M. Woźniak-Chodacka).
FIGURE 4 in Lectotypification, epitypification and taxonomic notes on Oenothera fallax (Onagraceae)
FIGURE 4. Rhachis of Oenothera fallax Renner covered with red-coloured papillae (phot. M. Woźniak-Chodacka).
Data from: Fitness consequences of occasional outcrossing in a functionally asexual plant (Oenothera biennis)
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Data from: Local topography shapes fine-scale spatial genetic structure in the Arkansas Valley evening primrose, Oenothera harringtonii (Onagraceae)
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Data from: Genotypic diversity mitigates negative effects of density on plant performance: a field experiment and life-cycle analysis of common evening primrose Oenothera biennis
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Supporting Data for: Differential gene expression associated with a floral scent polymorphism in the evening primrose Oenothera harringtonii (Onagraceae)
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Data from: Tolerance to deer herbivory and resistance to insect herbivores in the common evening primrose (Oenothera biennis)
The evolution of plant defence in response to herbivory will depend on the fitness effects of damage, availability of genetic variation, and potential ecological and genetic constraints on defence. Here we examine the potential for evolution of tolerance to deer herbivory in Oenothera biennis while simultaneously considering resistance to natural insect herbivores. We examined: i) the effects of deer damage on fitness; ii) the presence of genetic variation in tolerance and resistance; iii) selection on tolerance; iv) genetic correlations with resistance that could constrain evolution of tolerance; and v) plant traits that might predict defence. In a field experiment, we simulated deer damage occurring early and late in the season, recorded arthropod abundances, flowering phenology, and measured growth rate and lifetime reproduction. Our study showed that deer herbivory has a negative effect on fitness, with effects being more pronounced for late-season damage. Selection acted to increase tolerance to deer damage, yet there was low and non-significant genetic variation in this trait. In contrast, there was substantial genetic variation in resistance to insect herbivores. Resistance was genetically uncorrelated with tolerance, whereas positive genetic correlations in resistance to insect herbivores suggest there exists diffuse selection on resistance traits. In addition, growth rate and flowering time did not predict variation in tolerance, but flowering phenology was genetically correlated with resistance. Our results suggest that deer damage has the potential to exert selection because browsing reduces plant fitness, but limited standing genetic variation in tolerance is expected to constrain adaptive evolution in O. biennis.
FIGURE 2 in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 2. The holotype of Oenothera perangusta Gates var. rubricalyx Gates (GH-00073030).
FIGURE 3 in A revision of taxonomic relation between Oenothera perangusta and O. ersteinensis (Onagraceae) based on morphometric research and statistical analyses
FIGURE 3. The paratype of Oenothera ersteinensis Linder & Jean (STR-40811).
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