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13 results for “self-pollination”
Dataset from: A test of the reproductive assurance hypothesis in Ipomoea hederacea: does inbreeding depression counteract the benefits of self-pollination?
<p><strong>PREMISE: Darwin proposed that self-pollination in allegedly outcrossing species might act as a reproductive assurance mechanism when pollinators or mates are scarce; however, in natural populations, the benefits of selfing may be opposed by seed discounting and inbreeding depression. While empirical studies show variation among species and populations in the magnitude of reproductive assurance, little is known about the counterbalancing effects of inbreeding depression.</strong></p> <p><strong>METHODS: By comparing the female reproductive success of emasculated and open-pollinated flowers, we assessed the reproductive assurance hypothesis in two Mexican populations of <em>Ipomoea hederacea.</em> In one population we assessed temporal variation in reproductive assurance for three years. We evaluated inbreeding depression on seed production, seedling germination, and dry plant mass by contrasting self- and cross-hand pollination treatments in one population for two years.</strong></p> <p><strong> KEY RESULTS: The contribution of self-pollination to female reproductive success was high and consistent between populations, but there was variation in reproductive assurance across years. Inbreeding depression was absent in the early stages of progeny development, but there was a small negative effect of inbreeding in the probability of germination and the mass of adult progeny. </strong></p> <p><strong>CONCLUSIONS: Self-pollination provided significant reproductive assurance in <em>I. hederacea </em>but this contribution was variable across time. The contribution of reproductive assurance is probably reduced by inbreeding depression in later stages of progeny development, but this counter-effect was small in the study populations. This study supports the hypothesis that reproductive assurance with limited inbreeding depression is likely an important selective force in the evolution of self-pollination in the genus <em>Ipomoea</em>. </strong></p>
Figure 3 in Pollination and breeding system in two sympatric Fuchsia (Onagraceae) species at the Parque Nacional do Itatiaia (Brazil): Hummingbirds, insects and facultative self-pollination
Figure 3. Importance Value Index (IVI) for the pollinators of Fuchsia campos-portoi, F. regia, and the overall for both species (Total).
Figure 2. A-D in Pollination and breeding system in two sympatric Fuchsia (Onagraceae) species at the Parque Nacional do Itatiaia (Brazil): Hummingbirds, insects and facultative self-pollination
Figure 2. A-D. Pollinators of F. regia. A and B. Clytolaema rubricauda (Trochilidae) showing large amounts of pollen of F. regia on the throat (B). C and D. Acroceridae flies. E-H. pollinators of F. campos-portoi. E. and F. Stephanoxis lalandi (Trochilidae). Notice the pollen onto the throat (F). G. and H. Bombus brasiliensis (Apidae). Notice the stigmatic surface touching the bee's ventral region (H).
Data from: Ecological causes and consequences of flower color polymorphism in a self-pollinating plant (Boechera stricta)
Intraspecific variation in flower color is often attributed to pollinator-mediated selection, yet this mechanism cannot explain flower color polymorphisms in self-pollinating species. Indirect selection mediated via biotic and abiotic stresses could maintain flower color variation in these systems. The selfing forb, Boechera stricta, typically displays white flowers, but some individuals produce purple flowers. We quantified environmental correlates of flower color in natural populations. To disentangle plasticity from genotypic variation, we performed a multiyear field experiment in five gardens. In controlled conditions, we evaluated herbivore preferences and the effects of drought stress and soil pH on flower color expression. In natural populations, purple-flowered individuals experienced lower foliar herbivory than did their white-flowered counterparts. This pattern also held in the common gardens. Additionally, low-elevation environments induced pigmented flowers (plasticity), and the likelihood of floral pigmentation decreased with source elevation of maternal families (genetic cline). Viability selection favored families with pigmented flowers. In the laboratory, herbivores exerted greater damage on tissue derived from white- vs purple-flowered individuals. Furthermore, drought induced pigmentation in white-flowered lineages, and white-flowered plants had a fecundity advantage in the well-watered control. Flower color variation in selfing species is probably maintained by herbivory, drought stress, and other abiotic factors that vary spatially.
Fruit-, seed- and seedling-related fitness traits after self-pollination and two types of cross-pollination in regionally and locally common and rare plant species
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Data from: Ecological causes and consequences of flower color polymorphism in a self-pollinating plant (Boechera stricta)
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FIGURE 2 in Cremastra saprophytica (Orchidaceae: Epidendroideae), a new leafless autonomously self-pollinating orchid species from Gifu Prefecture, Japan
FIGURE 2. Cremastra saprophytica (holotype). A. Habit. B. Pseudobulb with roots and a coralloid mycorrhizal rhizome; arrow points to mycorhizome. C. Flower, dorsal view. D. Lip. E. Dorsal sepals. F. Lateral sepals. H. Column (lateral, ventral and dorsal views). I. Close-up of the upper part of the lip (lateral and dorsal views). J. Close-up of the upper part of the column (lateral, ventral and dorsal views); arrow points to contact between pollinia and stigma. Scale bars: A = 10 cm; B–H = 1 cm; I–J = 5 mm.
FIGURE 1. Cremastra saprophytica from the type locality. A–C. Flowering plant. D. Flower, dorsal view. E. Flower, lateral view. F in Cremastra saprophytica (Orchidaceae: Epidendroideae), a new leafless autonomously self-pollinating orchid species from Gifu Prefecture, Japan
FIGURE 1. Cremastra saprophytica from the type locality. A–C. Flowering plant. D. Flower, dorsal view. E. Flower, lateral view. F. Flower, front view. Central arrow points to a small smooth callus of lip positioned at the base of midlobe, whereas the other arrows point to the inconspicuous lateral lobes. G. Fruiting plants. H. Fruiting body of Coprinellus disseminates, one of the associated fungi of C. saprophytica.
Large floral displays increase self-pollination but do not affect visitation rates in Clarkia concinna
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Figure 1. A in Pollination and breeding system in two sympatric Fuchsia (Onagraceae) species at the Parque Nacional do Itatiaia (Brazil): Hummingbirds, insects and facultative self-pollination
Figure 1. A. Flowers of Fuchsia regia in female (left) and male phases (right). B. Flowers of F. campos-portoi. C. Possible hybrid (F. regia x F. campos-portoi) photographed in 2009, near the IBAMA base ao the Itatiaia National Park.
Transcriptome profile analysis of young floral buds of fertile and sterile plants from the self-pollinated offspring of the hybrid between novel restorer line NR1 and Nsa CMS line in Brassica napus
GEO Series GSE42513. Brassica napus. 2 samples. Type: Expression profiling by high throughput sequencing.
Methyl DIP-chip from self-pollinated ddm1 mutant and ddm1 kyp double mutant
GEO Series GSE34222. Arabidopsis thaliana. 18 samples. Type: Methylation profiling by genome tiling array.
FIGURE 3. Cremastra aphylla from Hokkaido. A. Flowering plant. B in Cremastra saprophytica (Orchidaceae: Epidendroideae), a new leafless autonomously self-pollinating orchid species from Gifu Prefecture, Japan
FIGURE 3. Cremastra aphylla from Hokkaido. A. Flowering plant. B. Flowers; central arrow points to a large verruculose callus of lip positioned at the base of midlobe, whereas the other arrows point to the conspicuous lateral lobes. C. Close-up of the upper part of the lip and column, lateral view. D. Close-up of the upper part of the lip, dorsal view. E. Close-up of the upper part of column and anther cap (lateral and ventral views); arrow points to a large, folded viscidium attached to pollinia. A–B: Y. Sugawara KS872 (KYO). C–D: Suetsugu & Horie KS411 (KYO). All scale bars = 5 mm.
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