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PalDat - Palynological Database

an online publication on recent pollen

Triticum aestivum

Taxonomy: Angiospermae, Poales, Poaceae, Triticum

Published: 2021-01-04

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): large (51-100 µm),  size of hydrated pollen (LM): 51-100 µm,  shortest polar axis in equatorial view (LM): -,  longest polar axis in equatorial view (LM): -,  shortest diameter in equatorial or polar view (LM): 51-100 µm,  longest diameter in equatorial or polar view (LM): 51-100 µm,  pollen class: ulcerate,  polarity: heteropolar,  P/E-ratio: prolate,  shape: -,  outline in polar view: circular,  dominant orientation (LM): polar,  P/E-ratio (dry pollen): prolate,  shape (dry pollen): -,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): interapertural area sunken,  aperture number: 1,  aperture type: ulcus,  aperture condition: ulcerate,  aperture peculiarities: annulus, operculum

Ornamentation and Structure

LMornamentation LM: psilate,  nexine: -,  sexine: -,  SEMornamentation SEM: microechinate,  suprasculpture SEM: -,  TEMtectum: eutectate,  infratectum: columellate,  foot layer: continuous,  endexine: absent,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Author(s) of diagnosis: Diethart, Bernadette; Auer, Waltraud

Pictures

habitus

1. habitus

flower(s)

2. flower(s)

pollen grain with vegetative nucleus and two sperm cells

3. pollen grain with vegetative nucleus and two sperm cells

upper focus

4. upper focus

optical section

5. optical section

lower focus

6. lower focus

hydrated pollen

7. hydrated pollen

hydrated pollen

8. hydrated pollen

hydrated pollen

9. hydrated pollen

equatorial view

10. equatorial view

aperture

11. aperture

exine surface

12. exine surface

polar view (dry pollen grain)

13. polar view (dry pollen grain)

dry pollen grain in equatorial view

14. dry pollen grain in equatorial view

anther wall with Ubisch bodies

15. anther wall with Ubisch bodies

pollen grain in cross section

16. pollen grain in cross section

interapertural area of pollen wall

17. interapertural area of pollen wall

apertural area of pollen wall

18. apertural area of pollen wall

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. pollen grain with vegetative nucleus and two sperm cells - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
  4. upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  5. optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  6. lower focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  7. hydrated pollen - fresh, glycerine, unstained, photographer: Auer, W.
  8. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
  9. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
  10. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  11. 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. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  14. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
  15. anther wall with Ubisch bodies - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  16. pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  17. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  18. apertural area of pollen wall - 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, uranyl acetate & lead citrate, photographer: Diethart, B.

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:

Diethart B., Auer W. 2021. Triticum aestivum. In: PalDat - A palynological database. https://www.paldat.org/pub/Triticum_aestivum/304793;jsessionid=845F3CD1605DBD123F5263F890ADBBB6; accessed 2021-09-23

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