Alnus glutinosa
Taxonomy: Angiospermae, Fagales, Betulaceae, Alnus
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Alnus-glutinosa.htm
Published: 2020-07-29
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): 21-25 µm, shortest polar axis in equatorial view (LM): 21-25 µm, longest polar axis in equatorial view (LM): 21-25 µm, shortest diameter in equatorial or polar view (LM): 21-25 µm, longest diameter in equatorial or polar view (LM): 21-25 µm, pollen class: porate, polarity: isopolar, P/E-ratio: oblate, shape: -, outline in polar view: polygonal, dominant orientation (LM): oblique, P/E-ratio (dry pollen): oblate, shape (dry pollen): -, outline in polar view (dry pollen): polygonal, infoldings (dry pollen): interapertural area sunken, aperture number: 5, aperture type: porus, aperture condition: stephanoporate, porate, aperture peculiarities: stephanoaperturate
Ornamentation and Structure
LM ornamentation LM: psilate, nexine: -, sexine: -, SEM ornamentation SEM: microechinate, microrugulate, suprasculpture SEM: -, TEM tectum: eutectate, infratectum: granular, foot layer: continuous, endexine: absent, intine: monolayered, wall peculiarities: arcus, supratectal element: -
Miscellaneous
pollen coatings: absent, reserves in cytoplasm: lipids, cell number: 2-celled, Ubisch bodies: present
Annotations: apertures: pores or brevicolpi, aperure number also 4
Author(s) of diagnosis: Halbritter, Heidemarie; Sam, Saskia; Weber, Martina; Auer, Waltraud
Pictures
1. habitus
2. inflorescence(s)
3. inflorescence(s)
4. pollen grain with vegetative nucleus and generative cell
5. upper focus
6. optical section
7. lower focus
8. hydrated Pollen
9. hydrated Pollen
10. hydrated Pollen
11. polar view
12. polar view
13. equatorial view
14. equatorial view
15. aperture
16. aperture
17. arci connecting apertures
18. exine surface
19. exine surface
20. dry pollen grains
21. polar view (dry pollen grain)
22. dry pollen grain in equatorial view
23. pollen grain in cross section
24. aperture
25. apertural area of pollen wall
26. pollen wall
27. interapertural area of pollen wall
28. Ubisch bodies on inner anther wall
Picture legend
- habitus, photographer: Sam, S.
- inflorescence(s), photographer: Halbritter, H.
- inflorescence(s), photographer: Sam, S.
- pollen grain with vegetative nucleus and generative cell - fresh, unfixed, aceto-carmine, photographer: Sam, S.
- upper focus - fresh, acetolyzed, unstained, photographer: Sam, S.
- optical section - fresh, acetolyzed, unstained, photographer: Sam, S.
- lower focus - fresh, acetolyzed, unstained, photographer: Sam, S.
- hydrated Pollen - fresh, glycerine, unstained, photographer: Auer, W.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
- polar view - 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: Sam, S.
- equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
- equatorial view - 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: Sam, S.
- aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- arci connecting apertures - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
- dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
- polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Sam, S.
- dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Sam, S.
- pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
- aperture - fixed, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
- apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
- pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
- Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
Literature
- (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., Sam S., Weber M., Auer W. 2020. Alnus glutinosa. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Alnus_glutinosa/303762;jsessionid=FE57E4D38E2C30CBA243F6A42DC2B207; accessed 2025-01-10