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27 results for “Theca”
Text-fig. 27. Scanning electron microscope (SEM) images of stamens and pollen of Valvidistemon globiferus gen. et sp. nov.; Catefica locality, Portugal. a) Stamen in oblique lateral view showing laterally hinged valves, massive connective between the thecae and prominent, globular, apical extension of the connective; b) Stamen in oblique lateral view on the opposite side from (a) showing broken laterally hinged valves and distinct endothecium cells; c) Detail of stamen showing the large, longitudinally aligned cells of the massive connective, broad, poorly defined stamen base, and the laterally hinged valves of one of the thecae; d) Reticulate pollen attached to the inside of the anther wall. Specimen, Catefica 49-S107779 (holotype, a–d). Scale bars = 600 Μm (a, b), 100 Μm (c), 20 Μm (d). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 27. Scanning electron microscope (SEM) images of stamens and pollen of Valvidistemon globiferus gen. et sp. nov.; Catefica locality, Portugal. a) Stamen in oblique lateral view showing laterally hinged valves, massive connective between the thecae and prominent, globular, apical extension of the connective; b) Stamen in oblique lateral view on the opposite side from (a) showing broken laterally hinged valves and distinct endothecium cells; c) Detail of stamen showing the large, longitudinally aligned cells of the massive connective, broad, poorly defined stamen base, and the laterally hinged valves of one of the thecae; d) Reticulate pollen attached to the inside of the anther wall. Specimen, Catefica 49-S107779 (holotype, a–d). Scale bars = 600 Μm (a, b), 100 Μm (c), 20 Μm (d).
Text-fig. 26. Scanning electron microscope (SEM) images of stamens and pollen grains of Elasmostemon paisii gen. et sp. nov. (a–c) and laminar stamens with monocolpate reticulate pollen sp. (d–g); Catefica locality, Portugal. a) Stamen fragment with basal portion missing showing two pairs of pollen sacs on one surface of the stamen close to the margin and separated by a broad connective, except near the apex where the thecae meet; note that the thecae are dehisced with the walls of the pollen sacs curled back; b) Pollen grains inside a dehisced pollen sac; note variation in size and development of the reticulum; c) Detail of (b) showing monocolpate, reticulate pollen with lumen of reticulum varying markedly in size but partly obscured by residual organic material; d) Stamen with apical and basal part of anther preserved showing two pairs of pollen sacs (asterisks) on the curved, perhaps ventral, surface close to the stamen margin; e) Detail of crack in the anther showing the inner anther wall with densely spaced spherical orbicules that vary greatly in size; f) Pollen exposed in the crack in the anther; note coarsely foveolate to coarsely reticulate pollen wall and densely spaced orbicules; g) Folded pollen grains with reticulate pollen wall and also showing the inner anther wall with densely spaced spherical orbicules that vary greatly in size. Specimens, Catefica 49-S172560 (a–c), Catefica 50- S170384 (d–g). Scale bars = 600 Μm (a, d), 20 Μm (b, e), 6 Μm (c, f, g). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 26. Scanning electron microscope (SEM) images of stamens and pollen grains of Elasmostemon paisii gen. et sp. nov. (a–c) and laminar stamens with monocolpate reticulate pollen sp. (d–g); Catefica locality, Portugal. a) Stamen fragment with basal portion missing showing two pairs of pollen sacs on one surface of the stamen close to the margin and separated by a broad connective, except near the apex where the thecae meet; note that the thecae are dehisced with the walls of the pollen sacs curled back; b) Pollen grains inside a dehisced pollen sac; note variation in size and development of the reticulum; c) Detail of (b) showing monocolpate, reticulate pollen with lumen of reticulum varying markedly in size but partly obscured by residual organic material; d) Stamen with apical and basal part of anther preserved showing two pairs of pollen sacs (asterisks) on the curved, perhaps ventral, surface close to the stamen margin; e) Detail of crack in the anther showing the inner anther wall with densely spaced spherical orbicules that vary greatly in size; f) Pollen exposed in the crack in the anther; note coarsely foveolate to coarsely reticulate pollen wall and densely spaced orbicules; g) Folded pollen grains with reticulate pollen wall and also showing the inner anther wall with densely spaced spherical orbicules that vary greatly in size. Specimens, Catefica 49-S172560 (a–c), Catefica 50- S170384 (d–g). Scale bars = 600 Μm (a, d), 20 Μm (b, e), 6 Μm (c, f, g).
Text-fig. 25. Scanning electron microscope (SEM) images of stamens and pollen grains of Elasmostemon paisii gen. et sp. nov.; Catefica locality, Portugal. a) Stamen fragment showing two pairs of pollen sacs along the margins of the stamen with a broad connective that separates the thecae, except near the apex where the thecae meet; b) Detail of surface of pollen sacs showing larger cells (arrows), interpreted as ethereal oil cells; c) Pollen in situ from specimen in (a); d) Stamen fragment with apical and basal portion missing and surface slightly abraded and compressed obscuring cellular details; note remains of another stamen attached to the underside of the stamen; e–h) Pollen in situ from specimen in (d) showing long aperture (e) and pollen wall with heterobrochate reticulum (e–h); note narrow muri with flatten and smooth surface and short columellae (h). Specimens, Catefica 49-S115859 (a–c), Catefica 151-S105281 (holotype, d–h). Scale bars = 600 Μm (a, d), 50 Μm (b), 6 Μm (c, e–g), 1.5 Μm (h). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 25. Scanning electron microscope (SEM) images of stamens and pollen grains of Elasmostemon paisii gen. et sp. nov.; Catefica locality, Portugal. a) Stamen fragment showing two pairs of pollen sacs along the margins of the stamen with a broad connective that separates the thecae, except near the apex where the thecae meet; b) Detail of surface of pollen sacs showing larger cells (arrows), interpreted as ethereal oil cells; c) Pollen in situ from specimen in (a); d) Stamen fragment with apical and basal portion missing and surface slightly abraded and compressed obscuring cellular details; note remains of another stamen attached to the underside of the stamen; e–h) Pollen in situ from specimen in (d) showing long aperture (e) and pollen wall with heterobrochate reticulum (e–h); note narrow muri with flatten and smooth surface and short columellae (h). Specimens, Catefica 49-S115859 (a–c), Catefica 151-S105281 (holotype, d–h). Scale bars = 600 Μm (a, d), 50 Μm (b), 6 Μm (c, e–g), 1.5 Μm (h).
Text-fig. 29. Scanning electron microscope (SEM) images of stamens and pollen grains of cf. Endressistemon sp. 1 (a, b), cf. Endressistemon sp. 2 (c, d) and cf. Endressistemon sp. 3 (e–g); Catefica locality, Portugal. a) Two adhering stamens, each with a long, pointed extension of the connective; b) Monocolpate, reticulate pollen in situ in stamen from stamen pair in (a); c) Fragment of stamen with prominent apical extension of the connective; d) Reticulate, apparently monocolpate, pollen in situ in stamen fragment in (c); e) Stamen with basifixed anther, perhaps sessile, and with prominent, wing-like apical extensions of the connective; note the dehisced thecae with the anther wall curved back; f, g) Monocolpate, reticulate pollen in situ in stamen in (e). Specimens, Catefica 49-S107780 (a, b), Catefica 49-S107784 (c, d), Catefica 49-S107781 (e–g). Scale bars = 600 Μm (a, c, e), 6 Μm (b, d, f, g). in The Early Cretaceous Mesofossil Flora Of Catefica, Portugal: Angiosperms
Text-fig. 29. Scanning electron microscope (SEM) images of stamens and pollen grains of cf. Endressistemon sp. 1 (a, b), cf. Endressistemon sp. 2 (c, d) and cf. Endressistemon sp. 3 (e–g); Catefica locality, Portugal. a) Two adhering stamens, each with a long, pointed extension of the connective; b) Monocolpate, reticulate pollen in situ in stamen from stamen pair in (a); c) Fragment of stamen with prominent apical extension of the connective; d) Reticulate, apparently monocolpate, pollen in situ in stamen fragment in (c); e) Stamen with basifixed anther, perhaps sessile, and with prominent, wing-like apical extensions of the connective; note the dehisced thecae with the anther wall curved back; f, g) Monocolpate, reticulate pollen in situ in stamen in (e). Specimens, Catefica 49-S107780 (a, b), Catefica 49-S107784 (c, d), Catefica 49-S107781 (e–g). Scale bars = 600 Μm (a, c, e), 6 Μm (b, d, f, g).
Theca Cell Function in Women With Polycystic Ovary Syndrome (PCOS)
ClinicalTrials.gov study NCT00747617. IPD Sharing: NO. Countries: 1. Publications: 11.
Ovarian Morphology and Theca Cell Androgen Production in Women With Polycystic Ovary Syndrome (PCOS)
ClinicalTrials.gov study NCT02145247. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Fig. 5 Pollen observed under SEM. A, A in The diversification of thecae horns and their putative significance-a case study of Schismatoglottideae (Araceae)
Fig. 5 Pollen observed under SEM. A, A. pendek (10 μm); B, B. caulescens (10 μm); C, B. purseglovei (10 μm); D, H. nicolsonii (10 μm); E, H. borneense (10 μm); F, T. alatensis (5 μm); G, T. surukensis
Fig. 3 in The diversification of thecae horns and their putative significance-a case study of Schismatoglottideae (Araceae)
Fig. 3 Microstructures of the stamens. A1–A6, Aridarum incavatum. A1, Stamen at pistillate anthesis (100 μm), A2, Smooth and clavate papillae cells on the thecae horns and stamen surface (10 μm), A3, Capitate and conical from side view of the papillae cells (10 μm), A4, Irregular shapes of oxalate crystals on the stamen surface at pistillate anthesis (5 μm), A5, Stamen at staminate anthesis (20 μm), A6, Distribution of oxalate crystals on thecae horns during staminate anthesis (100 μm); B1–B6, Aridarum montanum. B1, Stamen at pistillate anthesis (200 μm), B2, Stomata with vermiform papillae cells covered the stamen surface from near the base of the horned thecae (10 μm), B3, Smooth surface of thecae horn (10 μm), B4, Stamen at staminate anthesis (10 μm), B5, Remnants found on papillae cells (10 μm), B6, Triangular prism crystals (20 μm); C1–C6, Aridarum pendek. C1, Stamen at pistillate anthesis (100 μm), C2, Smooth surface on the tip of thecae horn, followed by cerebriform papillae cells (10 μm), C3, Papillae cells on the stamen surface (10 μm), C4, Stamen at staminate anthesis (100 μm), C5, Pollen (arrowhead) was found in the thecae path (50 μm), C6, Papillae cells on the stamen
Fig. 2 in The diversification of thecae horns and their putative significance-a case study of Schismatoglottideae (Araceae)
Fig. 2 Inflorescences at staminate anthesis for taxa included in this study. A, Toga rostrata; B, Toga surukensis; C, Toga unca; D, Pursegloveia ashtonii; E, Pursegloveia burttii; F, Pursegloveia minima; G, Pursegloveia orientalis; H, Hera hebe; I, Tawaia sabahensis; J, Naiadia zygoseta
Fig. 1 in The diversification of thecae horns and their putative significance-a case study of Schismatoglottideae (Araceae)
Fig. 1 Inflorescences at staminate anthesis for taxa included in this study. A, Aridarum incavatum; B, Aridarum pendek; C, Aridarum montanum; D, Burttianthus purseglovei; E, Burttianthus caulescens;
FIGURE 3. Salvia topiensis A. Habit. B. Floral bract, outer surface. C. Calyx. D. Corolla. E. Connectives and thecae. F in Salvia albicalyx and Salvia topiensis (Lamiaceae), two new species from Durango, Mexico
FIGURE 3. Salvia topiensis A. Habit. B. Floral bract, outer surface. C. Calyx. D. Corolla. E. Connectives and thecae. F. Apex of the style. G. Nutlets, dorsal (left) and ventral (right) surfaces. Illustration based on A. Benítez-P. 2426 and S. Acevedo 196 & D. Bayona; drawn by J.G. González-Gallegos.
FIGURE 1. Salvia albicalyx A. Habit. B. Floral bract, outer surface. C. Calyx. D. Corolla. E. Connectives and thecae. F in Salvia albicalyx and Salvia topiensis (Lamiaceae), two new species from Durango, Mexico
FIGURE 1. Salvia albicalyx A. Habit. B. Floral bract, outer surface. C. Calyx. D. Corolla. E. Connectives and thecae. F. Apex of the style. G. Nutlets, dorsal (left) and ventral (right) surfaces. Illustration based on I. Solís 957; drawn by J.G. González-Gallegos.
FIGURE. General characters in Myrcia. A: Asymmetrical anther thecae; B: Symmetrical anther thecae; C: Simple trichome; D: Dibrachiate trichome; E: 2-locular ovary; F: 3-locular ovary; G: Hypanthium persistent in the fruit, hollow; H: Hypanthium persistent in the fruit, beaked and filled by tissue; I. Homogeneous gland dots; J: Heterogeneous gland dots; K: Tertiary veins densely reticulated; L: Tertiary veins sparsely reticulated. (A: Oliveira 841; B: Moreira 404; C: Lindeman 1640; D: Hatschbach 13407; E: Bonaldi 502; F: Hatschbach 8646; G: Silva 4334; H: Brotto 2434; I: Hatschbach 61476; J: Carrião s.n. UPCB 28305; K: Kuniyoshi 4844; L: Michelon 1327). in Myrcia (Myrtaceae) in the state of Paraná, Brazil
FIGURE. General characters in Myrcia. A: Asymmetrical anther thecae; B: Symmetrical anther thecae; C: Simple trichome; D: Dibrachiate trichome; E: 2-locular ovary; F: 3-locular ovary; G: Hypanthium persistent in the fruit, hollow; H: Hypanthium persistent in the fruit, beaked and filled by tissue; I. Homogeneous gland dots; J: Heterogeneous gland dots; K: Tertiary veins densely reticulated; L: Tertiary veins sparsely reticulated. (A: Oliveira 841; B: Moreira 404; C: Lindeman 1640; D: Hatschbach 13407; E: Bonaldi 502; F: Hatschbach 8646; G: Silva 4334; H: Brotto 2434; I: Hatschbach 61476; J: Carrião s.n. UPCB 28305; K: Kuniyoshi 4844; L: Michelon 1327).
◂Fig. 5 Cells of phylogenetically related strains (light microscopy). a Thecate cell in dorsal view. b Thecate cell in ventral view, note the sulcus extending onto the epitheca (arrow). c Putatively necrotic, thecate cell. d Thecate cell with one bulge on the epitheca (arrow), note that this was the only such cell among thousands of inspected cells. e, f Coccoid cells, apparently without thecae. g Two thecate cells enclosed in the parental theca. h Two connected, immotile cells enclosed in the parental thecae. j Lid of epitheca in dorsal-apical view (mirrored), composed of plates 2′‒4′, all intercalary plates and plates 2′′‒6′′. l‒m Same opened theca in ventral view (l) and dorsal view (m), note the sulcus extending onto the epitheca (arrow), the dorsal opening and all apical and all intercalary plates and plates 3′′‒5′′ remaining with the hypotheca. n Chloroplasts (as inferred from autofluorescence), note the space occupied by the nucleus. Plate labelling follows the Kofoidean notation, n′: apical plate; n′′: precingular plate; n′′′: postcingular plate; na: anterior intercalary plate. Scale= 10 µm in Bumps on the back: An unusual morphology in phylogenetically distinct Peridinium aff. cinctum (= Peridinium tuberosum; Peridiniales, Dinophyceae)
◂Fig. 5 Cells of phylogenetically related strains (light microscopy). a Thecate cell in dorsal view. b Thecate cell in ventral view, note the sulcus extending onto the epitheca (arrow). c Putatively necrotic, thecate cell. d Thecate cell with one bulge on the epitheca (arrow), note that this was the only such cell among thousands of inspected cells. e, f Coccoid cells, apparently without thecae. g Two thecate cells enclosed in the parental theca. h Two connected, immotile cells enclosed in the parental thecae. j Lid of epitheca in dorsal-apical view (mirrored), composed of plates 2′‒4′, all intercalary plates and plates 2′′‒6′′. l‒m Same opened theca in ventral view (l) and dorsal view (m), note the sulcus extending onto the epitheca (arrow), the dorsal opening and all apical and all intercalary plates and plates 3′′‒5′′ remaining with the hypotheca. n Chloroplasts (as inferred from autofluorescence), note the space occupied by the nucleus. Plate labelling follows the Kofoidean notation, n′: apical plate; n′′: precingular plate; n′′′: postcingular plate; na: anterior intercalary plate. Scale= 10 µm
Theca Cell Function in Adolescents With Polycystic Ovary Syndrome (PCOS)
ClinicalTrials.gov study NCT01154192. IPD Sharing: NO. Countries: 1. Publications: 0.
RNA-seq profiling of theca and granulosa tissue of dominant follicle at 3 stages of follicular development in cows and heifers.
GEO Series GSE34317. Bos taurus. 65 samples. Type: Expression profiling by high throughput sequencing.
Developmental Programming: Sheep Granulosa and Theca Cell-Specific Transcriptional Regulation by Prenatal Testosterone
GEO Series GSE150236. Ovis aries. 20 samples. Type: Expression profiling by high throughput sequencing.
Expression data from bovine ovarian theca cells in primary culture
GEO Series GSE44704. Bos taurus. 16 samples. Type: Expression profiling by array.
Gene expression in bovine ovarian follicle theca interna
GEO Series GSE49505. Bos taurus. 19 samples. Type: Expression profiling by array.
The pre-ovulatory LH surge elicits different effects on the granulosa- and theca-specific expression profiles in bovine follicles
GEO Series GSE46996. Bos taurus. 18 samples. Type: Expression profiling by array.
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