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PalDat - Palynological Database

an online publication on recent pollen

Alnus glutinosa

Taxonomy: Angiospermae, Fagales, Betulaceae, Alnus

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),  pollen class: porate,  polarity: isopolar,  shape: oblate,  outline in polar view: polygonal,  shape (dry pollen): oblate,  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: scabrate,  nexine: -,  sexine: -,  SEMornamentation SEM: microrugulate, microechinate,  TEMtectum: eutectate,  infratectum: granular,  foot layer: continuous,  endexine: absent,  intine: monolayered,  wall peculiarities: arcus

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

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

polar view

8. polar view

polar view

9. polar view

equatorial view

10. equatorial view

equatorial view

11. equatorial view

aperture

12. aperture

aperture

13. aperture

arci connecting apertures

14. arci connecting apertures

exine surface

15. exine surface

exine surface

16. exine surface

dry pollen grains

17. dry pollen grains

polar view (dry pollen grain)

18. polar view (dry pollen grain)

dry pollen grain in equatorial view

19. dry pollen grain in equatorial view

pollen grain in cross section

20. pollen grain in cross section

aperture

21. aperture

apertural area of pollen wall

22. apertural area of pollen wall

pollen wall

23. pollen wall

interapertural area of pollen wall

24. interapertural area of pollen wall

Ubisch bodies on inner anther wall

25. 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. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  9. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  10. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  11. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  12. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  13. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  14. arci connecting apertures - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  15. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  16. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Sam, S.
  17. dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
  18. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Sam, S.
  19. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Sam, S.
  20. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
  21. aperture - fixed, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  22. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Sam, S.
  23. pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  24. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  25. 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. 2016. Alnus glutinosa. In: PalDat - A palynological database. https://www.paldat.org/pub/Alnus_glutinosa/302056;jsessionid=369BC3201EAF5B6A6B5F348F7BC3B77F; accessed 2018-11-15

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