Corylus avellana
Taxonomy: Angiospermae, Fagales, Betulaceae, Corylus
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Corylus-avellana.htm
Published: 2025-03-15
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): 31-35 µm, 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: -, shape: spheroidal, outline in polar view: circular, dominant orientation (LM): oblique, P/E-ratio (dry pollen): oblate, shape (dry pollen): -, outline in polar view (dry pollen): triangular, infoldings (dry pollen): interapertural area sunken, aperture number: 3, aperture type: porus, aperture condition: triporate, porate, aperture peculiarities: operculum, annulus, oncus
Ornamentation and Structure
LM ornamentation LM: scabrate, psilate, nexine: -, sexine: -, SEM ornamentation SEM: granulate, rugulate, suprasculpture SEM: -, TEM tectum: eutectate, infratectum: granular, foot layer: continuous, endexine: absent, intine: monolayered, wall peculiarities: -, supratectal element: -
Miscellaneous
pollen coatings: absent, reserves in cytoplasm: starch, cell number: 2-celled, Ubisch bodies: present
Author(s) of diagnosis: Halbritter, Heidemarie; Diethart, Bernadette; Heigl, Helmut; Gilot, Philippe
Pictures
1. male flowers of Corylus avellana
2. male flowers of Corylus avellana
3. male flowers of Corylus avellana
4. pollen grain with generative cell
5. upper focus
6. optical section
7. lower focus
8. hydrated Pollen
9. hydrated Pollen
10. hydrated Pollen
11. hydrated pollen, close-up of aperture
12. pollen grains with Ubisch bodies
13. polar view
14. equatorial view
15. aperture
16. exine surface
17. dry pollen grains
18. polar view (dry pollen grain)
19. dry pollen grain in equatorial view
20. Ubisch bodies
21. pollen grain in cross section
22. apertural area of pollen wall
23. pollen wall at transition of aperture and interapertural area
24. interapertural area of pollen wall
25. anther wall with Ubisch bodies in loculus
Picture legend
- male flowers of Corylus avellana, photographer: Halbritter, H.
- male flowers of Corylus avellana, photographer: Diethart, B.
- male flowers of Corylus avellana, photographer: Diethart, B.
- pollen grain with generative cell - 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 - fresh, glycerine, unstained, photographer: Heigl, H.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- hydrated pollen, close-up of aperture - fresh, unfixed & rehydrated (water), unstained, photographer: Gilot, P.
- pollen grains with Ubisch bodies - fresh, DMP & critical point dried, photographer: Halbritter, H.
- polar view - fresh, DMP & critical point dried, photographer: Halbritter, H.
- equatorial view - fresh, DMP & critical point dried, photographer: Halbritter, H.
- aperture - fresh, DMP & critical point dried, photographer: Halbritter, H.
- exine surface - fresh, DMP & critical point dried, 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.
- Ubisch bodies - fresh, DMP & critical point dried, photographer: Halbritter, H.
- pollen grain in cross section - 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 wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
- anther wall with Ubisch bodies in loculus - fresh, glutaraldehyde & osmium & potassium ferrocyanide, Thiéry-test, photographer: Diethart, B.
Literature
- (2003) Betulaceae and Corylaceae. In: The Northwest European Pollen Flora 65. Rev Palaeobot Palynol 123: 71-98
- (1998) Preparing living pollen material for scanning electron microscopy using 2,2-dimethoxypropane (DMP) and criticalpoint drying. Biotechnic Histochem 73: 137–143
- (1994) Exkursionsflora von Österreich : 1180
Copyright and Citation
Cite this publication as:
Halbritter H., Diethart B., Heigl H., Gilot P. 2025. Corylus avellana. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Corylus_avellana/306797; accessed 2025-04-26