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229 results for “stamen”
FIGURE 1. Cardamine pakistanica. A. Plant. B. Basal leaf. C. Cauline leaf. D. Sepal. E. Petal. F. Median stamen. G in Cardamine pakistanica (Cardamineae; Brassicaceae), a new species from North Pakistan
FIGURE 1. Cardamine pakistanica. A. Plant. B. Basal leaf. C. Cauline leaf. D. Sepal. E. Petal. F. Median stamen. G. Lateral stamen. Drawn and simplified by Al-Shehbaz from the holotype (Schikhoff 1735, MSB-142915).
FIGURE 2. Friesodielsia chalermglinii. A. Flowering branch. B. Flowers, side view. C. Bract, abaxial view. D. Bract, adaxial view. E. Sepal, abaxial view. F. Sepal, adaxial view. G. Outer petal, abaxial view. H. Outer petal, adaxial view. I. Inner petal, abaxial view. J. Inner petal, adaxial view. K. Stamen, abaxial view. L. Stamen, adaxial view. M., N in Two new species of Friesodielsia (Annonaceae) from Peninsular Thailand
FIGURE 2. Friesodielsia chalermglinii. A. Flowering branch. B. Flowers, side view. C. Bract, abaxial view. D. Bract, adaxial view. E. Sepal, abaxial view. F. Sepal, adaxial view. G. Outer petal, abaxial view. H. Outer petal, adaxial view. I. Inner petal, abaxial view. J. Inner petal, adaxial view. K. Stamen, abaxial view. L. Stamen, adaxial view. M., N. Carpels. Drawn by A. Somphrom.
FIGURE 1. Friesodielsia betongensis. A. Flowering branch. B. Flower, C. Sepal, abaxial view. D. Sepal, adaxial view. E. Outer petal, abaxial view. F. Outer petal, adaxial view. G. Inner petal, abaxial view. H. Inner petal, adaxial view. I. Stamen, abaxial view. J. Stamen, adaxial view. K., L. Carpels. M in Two new species of Friesodielsia (Annonaceae) from Peninsular Thailand
FIGURE 1. Friesodielsia betongensis. A. Flowering branch. B. Flower, C. Sepal, abaxial view. D. Sepal, adaxial view. E. Outer petal, abaxial view. F. Outer petal, adaxial view. G. Inner petal, abaxial view. H. Inner petal, adaxial view. I. Stamen, abaxial view. J. Stamen, adaxial view. K., L. Carpels. M. Fruiting branch. Drawn by A. Somphrom.
FIGURE 1. Saxifraga bergenioides. A. Habit. B. Flower. C. Sepals. D. Sepal enlarged view. E. Petals. F. Stamens. G in Notes on the distribution and typification of Saxifraga bergenioides (Saxifragaceae)
FIGURE 1. Saxifraga bergenioides. A. Habit. B. Flower. C. Sepals. D. Sepal enlarged view. E. Petals. F. Stamens. G. Pistil.
FIGURE 1. A. Plant. B. Petal. C. Median stamen. D. Lateral Stamen. E in Aubrieta amasya (Brassicaceae, Cruciferae), a new species from northern Turkey
FIGURE 1. A. Plant. B. Petal. C. Median stamen. D. Lateral Stamen. E. Fruit and fruiting pedicel. Drawn by Al-Shehbaz from the isotype (MO-7011600).
Data from: Divergent selection on the biomechanical properties of stamens under wind and insect pollination
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Stamen dimorphism in bird-pollinated flowers – investigating alternative hypotheses on the evolution of heteranthery
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FIGURE 3 in A new species of Meriania of the Brachycera group (Melastomataceae: Merianieae) with dimorphic stamens
FIGURE 3. Geographic distribution of Meriania juan-canoi.
Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 3"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment, containing one kind of pollen; b, d, e) Pollen grains from stamen fragment in polar (b, d) and equatorial (e) views showing the long colpi with coarsely verrucate aperture membranes; note the semitectate-reticulate tectum in the mesocolpium regions and foveolate-punctate tectum in the polar regions and along the aperture margins; c) Detail of pollen wall showing smooth muri and short, densely-spaced columellae. Specimen, Catefica 49-S107785 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1.5 Μm (c). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 39. Scanning electron microscope (SEM) images of "Pollen clump with tricolpate pollen sp. 3"; Catefica locality, Portugal. a) Pollen clump, probably an anther fragment, containing one kind of pollen; b, d, e) Pollen grains from stamen fragment in polar (b, d) and equatorial (e) views showing the long colpi with coarsely verrucate aperture membranes; note the semitectate-reticulate tectum in the mesocolpium regions and foveolate-punctate tectum in the polar regions and along the aperture margins; c) Detail of pollen wall showing smooth muri and short, densely-spaced columellae. Specimen, Catefica 49-S107785 (a–e). Scale bars = 600 Μm (a), 6 Μm (b, d, e), 1.5 Μm (c).
Text-fig. 16. Scanning electron microscope (SEM) images of "Stamen fragments with in situ Clavatipollenites- or Asteropollis-type pollen" (sp. 1: a–c; sp. 2: d–f; sp. 3: g–i); Catefica locality, Portugal. a) Stamen fragment showing pollen sacs; b) Distal view of pollen grain from (a) showing semitectate-reticulate tectum; c) Detail of pollen wall showing the semitectate-reticulate tectum and long, scattered, columellae supporting muri with fine pits and rounded supratectal ornamentation; note orbiculae with a finely spiny surface (arrows); d) Stamen showing very short filament, lateral pollen sacs and short apical extension of the narrow connective; e) Folded pollen grain from (d) showing semitectate-reticulate tectum; f) Detail of pollen wall from (d) showing the semitectatereticulate tectum and muri with fine rounded ornamentation; g) Stamen fragment; h, i) Detail of pollen grains from (g) showing the semitectate-reticulate tectum with smooth muri, long scattered columellae and tiny scattered orbicules (arrow). Specimens, Catefica 50-S170395 (a–c), Catefica 49-S172561 (d–f), Catefica 50-S170390 (g–i). Scale bars = 600 Μm (a, d, g), 6 Μm (b, e, h), 1.5 Μm (c, f, i). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 16. Scanning electron microscope (SEM) images of "Stamen fragments with in situ Clavatipollenites- or Asteropollis-type pollen" (sp. 1: a–c; sp. 2: d–f; sp. 3: g–i); Catefica locality, Portugal. a) Stamen fragment showing pollen sacs; b) Distal view of pollen grain from (a) showing semitectate-reticulate tectum; c) Detail of pollen wall showing the semitectate-reticulate tectum and long, scattered, columellae supporting muri with fine pits and rounded supratectal ornamentation; note orbiculae with a finely spiny surface (arrows); d) Stamen showing very short filament, lateral pollen sacs and short apical extension of the narrow connective; e) Folded pollen grain from (d) showing semitectate-reticulate tectum; f) Detail of pollen wall from (d) showing the semitectatereticulate tectum and muri with fine rounded ornamentation; g) Stamen fragment; h, i) Detail of pollen grains from (g) showing the semitectate-reticulate tectum with smooth muri, long scattered columellae and tiny scattered orbicules (arrow). Specimens, Catefica 50-S170395 (a–c), Catefica 49-S172561 (d–f), Catefica 50-S170390 (g–i). Scale bars = 600 Μm (a, d, g), 6 Μm (b, e, h), 1.5 Μm (c, f, i).
Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 15. Scanning electron microscope (SEM) images of stamen with "Asteropollis-type pollen sp. 2"; Catefica locality, Portugal. a) Stamen with pollen in situ showing the dome-shaped extension of the connective with hairs; b–d) Pollen in situ in stamen in (a) showing poorly defined pentachotomocolpate (b, d) and possibly tetrachotomocolpate (c) apertures and semitectate-reticulate tectum; e) Detail of broken pollen grains showing the loosely attached reticulum, long scattered columellae and thick foot layer. Specimen, Catefica 49-S101209 (a–e). Scale bars = 600 Μm (a), 6 Μm (b–e).
The effect of temporal changes in stamen position on reproductive success in flowers with many stamens: experimental manipulations of stamen position
<p class="MsoNormal"><span><strong>Premise of the study</strong>: </span><span>Male and female reproductive success is enhanced (increased outcrossing and seed production) by stamen movement</span><span> in species that have few stamens per flower.</span><span> Does such enhancement also occur in species that have many stamens per flower?</span></p> <p class="MsoNormal"><span><strong>Methods</strong>: </span><span>We examined the effects of stamen movement on male and female reproductive success in <em>Anemone flaccida</em>, which has </span><span>many stamens</span><span> per flower. We measured stamen movement, including temporal changes in anther-stigma and anther-anther distances. We controlled stamen movement experimentally.</span></p> <p class="MsoNormal"><span><strong>Key results</strong>: </span><span>The anthers moved horizontally away from the stigmas with increasing flower age, resulting in reduction in female-male interference. The dehisced anthers tended to move further away from the stigmas while the undehisced or dehiscing anthers remained nearer to them. The number of anthers touched per flower visit was higher in flowers whose stamens were fixed in the pre-movement position than in flowers whose stamens were fixed in the post-movement position or in flowers that were not manipulated. Thus, this position may promote male reproductive success. Seed production was lower for the untreated flowers than for the post-movement position flowers, suggesting that the post-movement stamen position is advantageous and stamen movement is suboptimal for female reproductive success.</span></p> <p class="MsoNormal"><span><strong>Conclusions</strong>: </span><span>Stamen movement promotes male reproductive success in the early flowering stage and female reproductive success in the late flowering stage. In species having many stamens per flower, female-male interference can be reduced, but not eliminated, by stamen movement due to the conflict between female and male reproductive successes.</span></p>
The effect of temporal changes in stamen position on reproductive success in flowers with many stamens: experimental manipulations of stamen position
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Identification of gene expression pattern in Brassica rapa floral tissues including Flowerbuds (≤ 2mm), Flowerbuds (≤ 4mm), Stamen and Carpel
GEO Series GSE128989. Brassica rapa. 11 samples. Type: Expression profiling by array.
Vojnik Stamenic
Gravestone of Serbian soldier from 19th century, Topčider Park, Belgrade. Krajputaš srpskog vojnika iz 19. veka, Beograd, Topčiderski park. http://www.ultrahome.in.rs/nadgrobni/stamenici.html Source: Objaverse 1.0 / Sketchfab
The Evaluation of Banana Flower Stamens Extract on Prevention of Benign Prostatic Hyperplasia in Adults
ClinicalTrials.gov study NCT04266418. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Transcriptional regulators of stamen development in Arabidopsis identified by transcriptional profiling
GEO Series GSE4733. Arabidopsis thaliana. 27 samples. Type: Expression profiling by array.
Global expression profiling applied to the analysis of Arabidopsis stamen development
GEO Series GSE8864. Arabidopsis thaliana. 33 samples. Type: Expression profiling by array.
A Gene Expression Profiling of Early Rice Stamen Development that Reveals Inhibition of Photosynthetic Genes by OsMADS58
GEO Series GSE53347. Oryza sativa; Oryza sativa Japonica Group. 21 samples. Type: Expression profiling by array.
FIGURE 5. Loropetalum axillare. A. Branch. B. Adaxial leaf. C. Abaxial leaf. D. Branchlet. E. Synflorescence. F. Flower. G. Flower. H. Stamens. I. Staminodes and styles. J. Stamens. K in Loropetalum axillare (Hamamelidaceae), a new species from Guangdong, China
FIGURE 5. Loropetalum axillare. A. Branch. B. Adaxial leaf. C. Abaxial leaf. D. Branchlet. E. Synflorescence. F. Flower. G. Flower. H. Stamens. I. Staminodes and styles. J. Stamens. K. Cross section of the ovary. L. Capsules. M. Capsule. N. Seeds. A–N: all photos by ZiChao Jin based on the type, Y. S. Chen, Y. C. Xu et Y. P. Zeng 22241 (IBSC).
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