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PalDat - Palynological Database

an online publication on recent pollen

Taraxacum officinale

Taxonomy: Angiospermae, Asterales, Asteraceae, Taraxacum

Published: 2016-08-11

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): -,  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: lophate,  polarity: isopolar,  P/E-ratio: -,  shape: spheroidal,  outline in polar view: circular,  dominant orientation (LM): -,  P/E-ratio (dry pollen): -,  shape (dry pollen): spheroidal,  outline in polar view (dry pollen): circular,  infoldings (dry pollen): no suitable term,  aperture number: 3,  aperture type: colporus,  aperture condition: colporate, tricolporate,  aperture peculiarities: -

Ornamentation and Structure

LMornamentation LM: echinate,  nexine: -,  sexine: -,  SEMornamentation SEM: echinate, perforate,  suprasculpture SEM: -,  TEMtectum: eutectate,  infratectum: alveolate,  foot layer: continuous,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: internal tectum,  supratectal element: -

Miscellaneous

pollen coatings: pollenkitt,  reserves in cytoplasm: starch,  cell number: 3-celled,  Ubisch bodies: absent

Author(s) of diagnosis: Bombosi, Paula

Pictures

flower(s)

1. flower(s)

polar view,upper focus

2. polar view, upper focus

optical section

3. optical section

polar view,lower focus

4. polar view, lower focus

pollen grain with sperm cells (arrows)

5. pollen grain with sperm cells (arrows)

polar view

6. polar view

equatorial view

7. equatorial view

detail of aperture

8. detail of aperture

exine surface

9. exine surface

exine surface

10. exine surface

dry pollen grain

11. dry pollen grain

pollen grain in cross section

12. pollen grain in cross section

interapertural area of pollen wall, intine (I), endexine (E)

13. interapertural area of pollen wall, intine (I), endexine (E)

interapertural area of pollen wall, intine (I), endexine (E)

14. interapertural area of pollen wall, intine (I), endexine (E)

aperture, intine (I)

15. aperture, intine (I)

Picture legend

  1. flower(s), photographer: Bombosi, P.
  2. polar view, upper focus - dry, acetolyzed, unstained, photographer: Bombosi, P.
  3. optical section - dry, acetolyzed, unstained, photographer: Bombosi, P.
  4. polar view, lower focus - dry, acetolyzed, unstained, photographer: Bombosi, P.
  5. pollen grain with sperm cells (arrows) - fixed, glutaraldehyde, aceto-carmine, photographer: Bombosi, P.
  6. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
  7. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
  8. detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
  9. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
  10. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
  11. dry pollen grain - dry, sputter coated with gold, photographer: Bombosi, P.
  12. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Bombosi, P.
  13. interapertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.
  14. interapertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.
  15. aperture, intine (I) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.

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:

Bombosi P. 2016. Taraxacum officinale. In: PalDat - A palynological database. https://www.paldat.org/pub/Taraxacum_officinale/301340;jsessionid=4872A62FF268AD1B0FCBD5E404C515A2; accessed 2024-03-28

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