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PalDat - Palynological Database

an online publication on recent pollen

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: porate, stephanoporate,  aperture peculiarities: stephanoaperturate

Ornamentation and Structure

LMornamentation LM: psilate,  nexine: -,  sexine: -,  SEMornamentation SEM: microrugulate, microechinate,  suprasculpture SEM: -,  TEMtectum: 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

habitus

1. habitus

inflorescence(s)

2. inflorescence(s)

inflorescence(s)

3. inflorescence(s)

pollen grain with vegetative nucleus and generative cell

4. pollen grain with vegetative nucleus and generative cell

upper focus

5. upper focus

optical section

6. optical section

lower focus

7. lower focus

hydrated Pollen

8. hydrated Pollen

hydrated Pollen

9. hydrated Pollen

hydrated Pollen

10. hydrated Pollen

polar view

11. polar view

polar view

12. polar view

equatorial view

13. equatorial view

equatorial view

14. equatorial view

aperture

15. aperture

aperture

16. aperture

arci connecting apertures

17. arci connecting apertures

exine surface

18. exine surface

exine surface

19. exine surface

dry pollen grains

20. dry pollen grains

polar view (dry pollen grain)

21. polar view (dry pollen grain)

dry pollen grain in equatorial view

22. dry pollen grain in equatorial view

pollen grain in cross section

23. pollen grain in cross section

aperture

24. aperture

apertural area of pollen wall

25. apertural area of pollen wall

pollen wall

26. pollen wall

interapertural area of pollen wall

27. interapertural area of pollen wall

Ubisch bodies on inner anther wall

28. Ubisch bodies on inner anther wall

Picture legend

  1. habitus, photographer: Sam, S.
  2. inflorescence(s), photographer: Halbritter, H.
  3. inflorescence(s), photographer: Sam, S.
  4. pollen grain with vegetative nucleus and generative cell - fresh, unfixed, aceto-carmine, photographer: Sam, S.
  5. upper focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  6. optical section - fresh, acetolyzed, unstained, photographer: Sam, S.
  7. lower focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  8. hydrated Pollen - fresh, glycerine, unstained, photographer: Auer, W.
  9. hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
  10. hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
  11. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  12. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  13. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  14. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  15. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  16. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  17. arci connecting apertures - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  18. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  19. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  20. dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
  21. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Sam, S.
  22. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Sam, S.
  23. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
  24. aperture - fixed, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  25. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
  26. pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  27. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  28. Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.

Literature

  • Adler W, Oswald K, Fischer R. (1994) Exkursionsflora von Österreich : 1180
  • Halbritter, H (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://www.paldat.org/pub/Alnus_glutinosa/303762;jsessionid=A8C5AA3D9F293FC817B39635780FC292; accessed 2020-08-14

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