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an online publication on recent pollen

Fraxinus ornus

Taxonomy: Angiospermae, Lamiales, Oleaceae, Fraxinus

Links: http://flora.nhm-wien.ac.at/seiten-arten/fraxinus-ornus.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): 16-20 µm,  shortest polar axis in equatorial view (LM): 16-20 µm,  longest polar axis in equatorial view (LM): 16-20 µm,  shortest diameter in equatorial or polar view (LM): 16-20 µm,  longest diameter in equatorial or polar view (LM): 16-20 µm,  pollen class: colporate,  polarity: isopolar,  P/E-ratio: isodiametric,  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: colporus,  aperture condition: colporate, tricolporate,  aperture peculiarities: -

Ornamentation and Structure

LMornamentation LM: reticulate,  nexine: -,  sexine: -,  SEMornamentation SEM: reticulate,  suprasculpture SEM: -,  TEMtectum: semitectate,  infratectum: columellate,  foot layer: continuous,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Annotations: ornamentation: reticulate to microreticulate

Author(s) of diagnosis: Halbritter, Heidemarie; 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

11. polar view

equatorial view

12. equatorial view

detail of polar area

13. detail of polar area

aperture

14. aperture

detail of aperture

15. detail of aperture

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

interapertural area of pollen wall

20. interapertural area of pollen wall

interapertural area of pollen wall

21. interapertural area of pollen wall

apertural area of pollen wall

22. apertural area of pollen wall

pollen wall at transition of aperture and interapertural area

23. pollen wall at transition of aperture and interapertural area

vegetative nucleus (left) and generative cell

24. vegetative nucleus (left) and generative cell

Picture legend

  1. flower(s), photographer: Halbritter, H.
  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 - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  12. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  13. detail of polar area - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  14. aperture - 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. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  17. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  18. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  19. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
  20. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  21. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, potassium permanganate, photographer: Diethart, B.
  22. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, potassium permanganate, photographer: Diethart, B.
  23. pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  24. vegetative nucleus (left) and generative cell - 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:

Halbritter H., Diethart B., Heigl H. 2020. Fraxinus ornus. In: PalDat - A palynological database. https://www.paldat.org/pub/Fraxinus_ornus/304332;jsessionid=266C69F90DA501B6B747631D04389DDE; accessed 2021-06-24

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