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PalDat - Palynological Database

an online publication on recent pollen

Fraxinus excelsior

Taxonomy: Angiospermae, Lamiales, Oleaceae, Fraxinus

Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Fraxinus-excelsior.htm

Published: 2020-12-07

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): 16-20 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: colpate,  polarity: isopolar,  P/E-ratio: -,  shape: spheroidal,  outline in polar view: circular,  dominant orientation (LM): oblique,  P/E-ratio (dry pollen): prolate,  shape (dry pollen): -,  outline in polar view (dry pollen): lobate,  infoldings (dry pollen): aperture(s) sunken,  aperture number: 3,  aperture type: colpus,  aperture condition: tricolpate, colpate,  aperture peculiarities: aperture membrane ornamented

Ornamentation and Structure

LM  ornamentation LM: reticulate,  nexine: -,  sexine: -,  SEM  ornamentation SEM: heterobrochate, reticulate, granulate,  suprasculpture SEM: -,  TEM  tectum: semitectate,  infratectum: columellate,  foot layer: absent,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

pollen coatings: pollenkitt,  reserves in cytoplasm: starch,  cell number: 2-celled,  Ubisch bodies: absent

Annotations: also 4 colpate pollen grains; granulae as sculpture elements; outline dry: lobate or triangular

Author(s) of diagnosis: Diethart, Bernadette; Heigl, Helmut

Pictures

flower(s)

1. flower(s)

flower(s)

2. flower(s)

flower(s)

3. flower(s)

pollen grain with generative cell

4. pollen grain with 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 (3-colpate pollen grain)

11. polar view (3-colpate pollen grain)

polar view (4-colpate pollen grain)

12. polar view (4-colpate pollen grain)

equatorial view (3-colpate pollen grain)

13. equatorial view (3-colpate pollen grain)

equatorial view (4-colpate pollen grain)

14. equatorial view (4-colpate pollen grain)

detail of aperture

15. detail of aperture

detail of aperture

16. detail of aperture

exine surface

17. exine surface

dry pollen grains

18. dry pollen grains

polar view (dry pollen grain)

19. polar view (dry pollen grain)

equatorial view (3-colpate pollen grain)

20. equatorial view (3-colpate pollen grain)

equatorial view (3-colpate pollen grain)

21. equatorial view (3-colpate pollen grain)

interapertural area of pollen wall

22. interapertural area of pollen wall

interapertural area of pollen wall

23. interapertural area of pollen wall

interapertural area of pollen wall

24. interapertural area of pollen wall

interapertural area of pollen wall

25. interapertural area of pollen wall

interapertural area of pollen wall

26. interapertural area of pollen wall

apertural area of pollen wall

27. apertural area of pollen wall

pollen wall at transition of aperture and interapertural area

28. pollen wall at transition of aperture and interapertural area

pollen wall at transition of aperture and interapertural area

29. pollen wall at transition of aperture and interapertural area

generative cell (left) and vegetative nucleus

30. generative cell (left) and vegetative nucleus

mitochondria and lipids in vegetative cytoplasm

31. mitochondria and lipids in vegetative cytoplasm

Picture legend

  1. flower(s), photographer: Diethart, B.
  2. flower(s), photographer: Diethart, B.
  3. flower(s), photographer: Diethart, B.
  4. pollen grain with generative cell - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
  5. upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  6. optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  7. lower focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  8. hydrated pollen - fresh, glycerine, unstained, photographer: Heigl, H.
  9. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  10. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  11. polar view (3-colpate pollen grain) - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  12. polar view (4-colpate pollen grain) - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  13. equatorial view (3-colpate pollen grain) - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  14. equatorial view (4-colpate pollen grain) - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  15. detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  16. detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  17. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  18. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  19. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  20. equatorial view (3-colpate pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  21. equatorial view (3-colpate pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  22. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  23. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  24. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, potassium permanganate, photographer: Diethart, B.
  25. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, Thiéry-test, photographer: Diethart, B.
  26. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  27. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  28. pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  29. pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, Thiéry-test, photographer: Diethart, B.
  30. generative cell (left) and vegetative nucleus - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  31. mitochondria and lipids in vegetative cytoplasm - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.

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:

Diethart B., Heigl H. 2020. Fraxinus excelsior. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Fraxinus_excelsior/304331; accessed 2025-04-28

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