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PalDat - Palynological Database

an online publication on recent pollen

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

LMornamentation LM: reticulate,  nexine: -,  sexine: -,  SEMornamentation SEM: reticulate, heterobrochate, free-standing columellae,  suprasculpture SEM: -,  TEMtectum: 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

habitus

1. habitus

flower(s)

2. flower(s)

flower(s)

3. flower(s)

pollen grain with two sperm cells and vegetative nucleus

4. pollen grain with two sperm cells and vegetative nucleus

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

equatorial view

13. equatorial view

detail of aperture

14. detail of aperture

exine surface

15. exine surface

dry pollen grains

16. dry pollen grains

dry pollen grain in equatorial view

17. dry pollen grain in equatorial view

pollen grain in cross section

18. pollen grain in cross section

interapertural area of pollen wall

19. interapertural area of pollen wall

apertural area of pollen wall

20. apertural area of pollen wall

detail of aperture

21. detail of aperture

pollen wall at transition of aperture and interapertural area

22. pollen wall at transition of aperture and interapertural area

Picture legend

  1. habitus, photographer: Diethart, B.
  2. flower(s), photographer: Diethart, B.
  3. flower(s), photographer: Diethart, B.
  4. pollen grain with two sperm cells and vegetative nucleus - fresh, rehydrated (water), 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. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  14. detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  15. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  16. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  17. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
  18. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  19. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  20. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  21. detail of aperture - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  22. pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.

Literature

  • FISCHER MA, ADLER W, OSWALD K (2005) Exkursionsflora für Österreich, Liechtenstein und Südtirol : 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:

Diethart B., Heigl H. 2020. Brassica napus. In: PalDat - A palynological database. https://www.paldat.org/pub/Brassica_napus/303973;jsessionid=D9B19562CFF6E18F909B6729F3644BE9; accessed 2020-12-03

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