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PalDat - Palynological Database

an online publication on recent pollen

Brassica napus

Taxonomy: Angiospermae, Brassicales, Brassicaceae, Brassica

Published: 2016-03-25

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): medium-sized (26-50 µm),  pollen class: colpate,  polarity: isopolar,  shape: prolate,  outline in polar view: circular,  shape (dry pollen): prolate,  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,  TEMtectum: semitectate,  infratectum: columellate,  foot layer: continuous,  endexine: absent,  intine: monolayered,  wall peculiarities: -

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

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

polar view

8. polar view

equatorial view

9. equatorial view

equatorial view

10. equatorial view

detail of aperture

11. detail of aperture

exine surface

12. exine surface

dry pollen grains

13. dry pollen grains

dry pollen grain in equatorial view

14. dry pollen grain in equatorial view

pollen grain in cross section

15. pollen grain in cross section

interapertural area of pollen wall

16. interapertural area of pollen wall

apertural area of pollen wall

17. apertural area of pollen wall

detail of aperture

18. detail of aperture

pollen wall at transition of aperture and interapertural area

19. 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. 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. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  11. detail of aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  12. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  13. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  14. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
  15. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  16. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  17. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  18. detail of aperture - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  19. 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. 2016. Brassica napus. In: PalDat - A palynological database. https://www.paldat.org/pub/Brassica_napus/300733;jsessionid=CFD2150A96839BF525AECF53BC7A1429; accessed 2018-11-13

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