Brassica napus
Taxonomy: Angiospermae, Brassicales, Brassicaceae, Brassica
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Brassica-napus-bi.htm
Published: 2020-11-20
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): 26-30 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: colpate, polarity: isopolar, P/E-ratio: prolate, shape: -, 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: colpate, tricolpate, aperture peculiarities: aperture membrane ornamented
Ornamentation and Structure
LM ornamentation LM: reticulate, nexine: -, sexine: -, SEM ornamentation SEM: reticulate, heterobrochate, free-standing columellae, suprasculpture SEM: -, TEM tectum: semitectate, infratectum: columellate, foot layer: continuous, endexine: absent, intine: monolayered, wall peculiarities: -, supratectal element: -
Miscellaneous
pollen coatings: tryphine, reserves in cytoplasm: lipids, cell number: 3-celled, Ubisch bodies: absent
Annotations: free-standing columellae rare
Author(s) of diagnosis: Diethart, Bernadette; Heigl, Helmut
Pictures
1. habitus
2. flower(s)
3. flower(s)
4. pollen grain with two sperm cells and vegetative nucleus
5. upper focus
6. optical section
7. lower focus
8. hydrated Pollen
9. hydrated Pollen
10. hydrated Pollen
11. polar view
12. equatorial view
13. equatorial view
14. detail of aperture
15. exine surface
16. dry pollen grains
17. dry pollen grain in equatorial view
18. pollen grain in cross section
19. interapertural area of pollen wall
20. apertural area of pollen wall
21. detail of aperture
22. pollen wall at transition of aperture and interapertural area
Picture legend
- habitus, photographer: Diethart, B.
- flower(s), photographer: Diethart, B.
- flower(s), photographer: Diethart, B.
- pollen grain with two sperm cells and vegetative nucleus - fresh, rehydrated (water), aceto-carmine, photographer: Diethart, B.
- upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
- optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
- lower focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
- 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: Diethart, B.
- equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
- equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
- detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
- dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
- dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
- pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
- interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
- apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
- detail of aperture - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
- pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
Literature
- (2005) Exkursionsflora für Österreich, Liechtenstein und Südtirol : 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:
Diethart B., Heigl H. 2020. Brassica napus. In: PalDat - A palynological database. https://www.paldat.org/pub/Brassica_napus/303973;jsessionid=F01E6B0D2F63F1C07290A1856AB3BDBE; accessed 2025-04-30