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PalDat - Palynological Database

an online publication on recent pollen

Urtica dioica

Taxonomy: Spermatophyta, Urticales, Urticaceae, Urtica

Published: 2005-06-01

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): small (10-25 µm),  size of hydrated pollen (LM): -,  shortest polar axis in equatorial view (LM): -,  longest polar axis in equatorial view (LM): -,  shortest diameter in equatorial or polar view (LM): -,  longest diameter in equatorial or polar view (LM): -,  pollen class: -,  polarity: isopolar,  P/E-ratio: -,  shape: spheroidal,  outline in polar view: circular,  dominant orientation (LM): -,  P/E-ratio (dry pollen): -,  shape (dry pollen): irregular,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): irregularly infolded,  aperture number: 3,  aperture type: -,  aperture condition: porate,  aperture peculiarities: operculum, annulus, oncus

Ornamentation and Structure

LM  ornamentation LM: psilate,  nexine: -,  sexine: -,  SEM  ornamentation SEM: microechinate,  suprasculpture SEM: -,  TEM  tectum: eutectate,  infratectum: columellate,  foot layer: absent,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Annotations: The endexine is very thin. Shape dry irregular

Author(s) of diagnosis: Halbritter, H.; Schneider, H.; Diethart, B.

Pictures

habitus

1. habitus

flower(s)

2. flower(s)

male flowers

3. male flowers

pollen grain with generative cell

4. pollen grain with generative cell

polar view (proximal)

5. polar view (proximal)

optical section

6. optical section

polar view (distal)

7. polar view (distal)

polar view

8. polar view

equatorial view

9. equatorial view

aperture

10. aperture

exine surface

11. exine surface

dry pollen grains

12. dry pollen grains

anther wall with Ubisch bodies

13. anther wall with Ubisch bodies

pollen grain in cross section

14. pollen grain in cross section

interapertural area of pollen wall

15. interapertural area of pollen wall

interapertural area of pollen wall

16. interapertural area of pollen wall

interapertural area of pollen wall

17. interapertural area of pollen wall

interapertural area of pollen wall

18. interapertural area of pollen wall

apertural area of pollen wall

19. apertural area of pollen wall

Ubisch bodies on inner anther wall

20. Ubisch bodies on inner anther wall

vegetative nucleus

21. vegetative nucleus

generative cell

22. generative cell

Picture legend

  1. habitus, photographer: Diethart, B.
  2. flower(s), photographer: Halbritter, H.
  3. male flowers, photographer: Schneider, H.
  4. pollen grain with generative cell - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
  5. polar view (proximal) - fresh, acetolyzed, unstained, photographer: Diethart, B.
  6. optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  7. polar view (distal) - fresh, acetolyzed, unstained, photographer: Diethart, B.
  8. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  9. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  10. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  11. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  12. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  13. anther wall with Ubisch bodies - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  14. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  15. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  16. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, potassium permanganate, photographer: Diethart, B.
  17. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  18. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, potassium permanganate, photographer: Diethart, B.
  19. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  20. Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  21. vegetative nucleus - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  22. generative cell - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.

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Copyright and Citation

Cite this publication as:

Halbritter H., Schneider H., Diethart B. 2005. Urtica dioica. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Urtica_dioica/113726; accessed 2025-04-28

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