Ulmus laevis
Taxonomy: Angiospermae, Rosales, Ulmaceae, Ulmus
Published: 2016-11-08
Pollen Description
Shape, Size and Aperture
pollen unit: monad, dispersal unit and peculiarities: monad, size (pollen unit): medium-sized (26-50 µm), size of hydrated pollen (LM): -, shortest polar axis in equatorial view (LM): -, longest polar axis in equatorial view (LM): -, shortest diameter in equatorial or polar view (LM): -, longest diameter in equatorial or polar view (LM): -, pollen class: porate, polarity: heteropolar, P/E-ratio: -, shape: spheroidal, outline in polar view: circular, dominant orientation (LM): -, P/E-ratio (dry pollen): -, shape (dry pollen): irregular, outline in polar view (dry pollen): irregular, infoldings (dry pollen): irregularly infolded, aperture number: 6, aperture type: porus, aperture condition: porate, aperture peculiarities: operculum
Ornamentation and Structure
LM ornamentation LM: rugulate, nexine: -, sexine: -, SEM ornamentation SEM: rugulate, granulate, suprasculpture SEM: -, TEM tectum: eutectate, infratectum: granular, foot layer: absent, endexine: compact-continuous, intine: monolayered, wall peculiarities: -, supratectal element: -
Miscellaneous
pollen coatings: absent, reserves in cytoplasm: starch, cell number: 3-celled, Ubisch bodies: present
Annotations: dry pollen irregularely infolded or cup-shaped; endexine not thickened in apertures; ornamentation rugulate to verrucate
Author(s) of diagnosis: Halbritter, Heidemarie; Diethart, Bernadette; Weber, Martina
Pictures
1. flower(s)
2. flower(s)
3. pollen grain with two sperm cells
4. upper focus
5. optical section
6. lower focus
7. hydrated pollen grains
8. polar view
9. polar view; note differences in exine
10. aperture
11. dry pollen grains
12. polar view (dry pollen grain)
13. dry pollen grain in equatorial view
14. anther wall with Ubisch bodies
15. interapertural area of pollen wall
16. interapertural area of pollen wall
17. interapertural area of pollen wall
18. apertural area of pollen wall
19. pollen grain at second pollen mitosis; vegetative nucleus (asterisk)
20. vegetative nucleus and sperm cell
21. vegetative nucleus
22. Ubisch bodies on inner anther wall
Picture legend
- flower(s), photographer: Diethart, B.
- flower(s), photographer: Diethart, B.
- pollen grain with two sperm cells - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
- upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
- optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
- lower focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
- hydrated pollen grains - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- polar view; note differences in exine - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
- polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
- dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
- anther wall with Ubisch bodies - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
- apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
- pollen grain at second pollen mitosis; vegetative nucleus (asterisk) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
- vegetative nucleus and sperm cell - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
- vegetative nucleus - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
- Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
Literature
- (1982) Apocynaceae, Bignoniaceae, Goodeniaceae, Lardizabalaceae, Menispermaceae, Nyctaginaceae, Papilionaceae, Rubiaceae, Samydaceae, Santalaceae, Sargentodoxaceae, Simaroubaceae, Thymelaeaceae, Ulmaceae. In: Angiosperm pollen flora of tropic and subtropic China. Inst Bot South China : 34-48, 60-65, 165-166, 183-186, 213-217, 244-246, 265-289, 305-325, 335-339, 351, 353-355, 375-377, 381-383
- (1986) Ontogenetic development of microspores of Ulmus (Ulmaceae). In: Blackmore S., Ferguson I.K. (eds) Pollen and spores: Form and Function. Acad Press, London : 19-33
- (1970) Species identification of Ulmus pollen. Dan Geol Unders 4: 1-19
- (1975) SEM studies on pollen grains of Northern European Ulmus species. Grana 14: 103-107
- (1989) Pollen morphology of Celtidaceae and Ulmaceae: a reinvestigation. In: Evolution, Systematics, and fossil History of the Hamamelidae. Vol 2: 'Higher'
- (1996) Phylogenetic analysis of Ulmaceae. Pl Syst Evol 200: 13-20
- (1994) Exkursionsflora von Österreich : 1180
- (1998) Preparing living pollen material for scanning electron microscopy using 2,2-dimethoxypropane (DMP) and criticalpoint drying. Biotechnic Histochem 73: 137–143
Copyright and Citation
Cite this publication as:
Halbritter H., Diethart B., Weber M. 2016. Ulmus laevis. In: PalDat - A palynological database. https://www.paldat.org/pub/Ulmus_laevis/302066; accessed 2025-04-30