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39 results for “Self pollination”
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.
Data from: A geographic cline in the ability to self-fertilize is unrelated to the pollination environment
<p>The reproductive assurance (RA) hypothesis predicts that the ability to autonomously self-fertilize should be favored in environments where a lack of mates or pollinators limits outcross reproduction. Because such limits to outcrossing are predicted to be most severe at range edges, elevated autonomy in peripheral populations is often attributed to RA. We test this hypothesis in 24 populations spanning the range of Campanula americana, including sampling at the range interior and three geographic range edges. We scored autonomous fruit set in a pollinator-free environment and detected clinal variation—autonomy increased linearly from the southern to the northern edge, and from the eastern to the western edge. We then address whether the cline reflects the contemporary pollination environment. We measured population size, plant density, pollinator visitation, outcross pollen limitation and RA in natural populations over two years. Most populations were pollen limited, and those that experienced higher visitation rates by bumblebees had reduced pollen limitation. Reproductive assurance, however, was generally low across populations and was unrelated to pollen limitation or autonomy. Neither pollen limitation nor RA displayed geographic clines. Finally, autonomy was not associated with pollinator visitation rates or mate availability. Thus, the data do not support the RA hypothesis; clinal variation in autonomy is unrelated to the current pollination environment. Therefore, geographic patterns of autonomy are likely the result of historical processes rather than contemporary natural selection for RA.</p>
Data from: Pollinator-mediated gene flow connects green roof populations across the urban matrix: a paternity analysis of the self-compatible forb Penstemon hirsutus
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Data from: Multiple independent origins of auto-pollination in tropical orchids (Bulbophyllum) in light of the hypothesis of selfing as an evolutionary dead end
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Data from: Edge effects enhance selfing and seed harvesting efforts in the insect-pollinated Neotropical tree Copaifera langsdorffii (Fabaceae)
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Data from: Selfing can facilitate transitions between pollination syndromes
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Large floral displays increase self-pollination but do not affect visitation rates in Clarkia concinna
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Data from: A geographic cline in the ability to self-fertilize is unrelated to the pollination environment
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Simulated pollinator declines intensify selection on floral traits that facilitate selfing and outcrossing in Impatiens capensis
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Data from: Distinct effects of pollinator dependence and self-incompatibility on pollen limitation in South African biodiversity hotspots
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Limited phenological and pollinator-mediated isolation among selfing and outcrossing Arabidopsis lyrata populations
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Database from: Managed honey bees decrease pollination limitation in self-compatible but not in self-incompatible crops
<p><span>Modern agriculture is becoming increasingly pollinator-dependent. However, the global stock of domesticated honey bees is growing at a slower rate than its demand while wild bees are declining worldwide. This uneven scenario of high pollinator demand and low pollinator availability can translate into increasing pollination limitation, reducing the yield of pollinator-dependent crops. However, overall assessments of crop pollination limitation and the factors determining its magnitude are missing.</span></p> <p><span><span>W</span><span>e assembled the first global database of pollination limitation in pollinator-dependent crops, encompassing </span><span>107 metadata comparing the quantity/quality of fruits/seeds produced by pollen supplemented vs naturally pollinated flowers. This database, based on 52 published studies, cover 30 crops in 52 crop systems. </span></span><span>We conducted a meta-analysis comparing crop yield in pollen-supplemented vs. open-pollinated flowers. We assessed the overall magnitude of pollination limitation and whether this magnitude was influenced by (a) the presence/absence of managed honey bees, (b) crop compatibility system (i.e., self-compatible/self-incompatible), and (c) the interaction between these two factors. </span></p>
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.
Database from: Managed honey bees decrease pollination limitation in self-compatible but not in self-incompatible crops
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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.
Dissection of the style’s response to pollination using transcriptome profiling in self-compatible (Solanum pimpinellifolium) and self-incompatible (Solanum chilense) tomato species
GEO Series GSE67654. Solanum pimpinellifolium; Solanum chilense. 12 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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