Taraxacum officinale
Taxonomy: Angiospermae, Asterales, Asteraceae, Taraxacum
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Taraxacum-officinale.htm
Published: 2021-02-10
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): 21-25 µm, shortest polar axis in equatorial view (LM): 21-25 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: lophate, polarity: isopolar, P/E-ratio: -, shape: spheroidal, outline in polar view: circular, dominant orientation (LM): oblique, 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
LM ornamentation LM: lophate, echinate, nexine: -, sexine: -, SEM ornamentation SEM: echinate, perforate, suprasculpture SEM: -, TEM tectum: 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; Heigl, Helmut
Pictures
1. flower(s)
2. polar view, upper focus
3. optical section
4. polar view, lower focus
5. pollen grain with sperm cells (arrows)
6. hydrated pollen
7. hydrated pollen
8. hydrated pollen
9. polar view
10. equatorial view
11. detail of aperture
12. exine surface
13. exine surface
14. dry pollen grain
15. pollen grain in cross section
16. interapertural area of pollen wall, intine (I), endexine (E)
17. interapertural area of pollen wall, intine (I), endexine (E)
18. aperture, intine (I)
Picture legend
- flower(s), photographer: Bombosi, P.
- polar view, upper focus - dry, acetolyzed, unstained, photographer: Bombosi, P.
- optical section - dry, acetolyzed, unstained, photographer: Bombosi, P.
- polar view, lower focus - dry, acetolyzed, unstained, photographer: Bombosi, P.
- pollen grain with sperm cells (arrows) - fixed, glutaraldehyde, aceto-carmine, photographer: Bombosi, P.
- hydrated pollen - fresh, glycerine, unstained, photographer: Heigl, H.
- hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
- equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
- detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Bombosi, P.
- dry pollen grain - dry, sputter coated with gold, photographer: Bombosi, P.
- pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Bombosi, P.
- interapertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.
- interapertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.
- aperture, intine (I) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Bombosi, P.
Literature
- (1994) Exkursionsflora von Österreich : 1180
- (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., Heigl H. 2021. Taraxacum officinale. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Taraxacum_officinale/305331;jsessionid=56F97B19DBF00B25EEC32BB841E7EC4E; accessed 2025-01-25