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an online publication on recent pollen

Secale cereale

Taxonomy: Angiospermae, Poales, Poaceae, Secale

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): 41-50 µm, 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): 41-50 µm,  longest diameter in equatorial or polar view (LM): 51-100 µm,  pollen class: ulcerate,  polarity: heteropolar,  P/E-ratio: -,  shape: no suitable term,  outline in polar view: circular,  dominant orientation (LM): polar,  P/E-ratio (dry pollen): -,  shape (dry pollen): irregular,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): irregularly infolded,  aperture number: 1,  aperture type: porus,  aperture condition: ulcerate,  aperture peculiarities: operculum, annulus

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

Annotations: shape hydrated: distal pole wider than the proximal pole; tectum with channels

Author(s) of diagnosis: Sam, Saskia; Heigl, Helmut

Pictures

inflorescence of Secale cereale

1. inflorescence of Secale cereale

flowers of Secale cereale

2. flowers of Secale cereale

upper focus

3. upper focus

optical section

4. optical section

lower focus

5. lower focus

pollen grain with vegetative nucleus and two sperm cells

6. pollen grain with vegetative nucleus and two sperm cells

hydrated pollen

7. hydrated pollen

hydrated pollen

8. hydrated pollen

hydrated pollen

9. hydrated pollen

polar view

10. polar view

equatorial view

11. equatorial view

aperture

12. aperture

exine surface

13. exine surface

dry pollen grains

14. dry pollen grains

dry pollen grain in equatorial view

15. dry pollen grain in equatorial view

anther wall with Ubisch bodies

16. anther wall with Ubisch bodies

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

vegetative nucleus (right) and sperm cell

20. vegetative nucleus (right) and sperm cell

Picture legend

  1. inflorescence of Secale cereale, photographer: Sam, S.
  2. flowers of Secale cereale, photographer: Sam, S.
  3. upper focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  4. optical section - fresh, acetolyzed, unstained, photographer: Sam, S.
  5. lower focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  6. pollen grain with vegetative nucleus and two sperm cells - fresh, unfixed, aceto-carmine, photographer: Sam, S.
  7. hydrated pollen - fresh, glycerine, unstained, photographer: Heigl, H.
  8. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  9. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  10. polar view - fresh, DMP & critical point dried, photographer: Sam, S.
  11. equatorial view - fresh, DMP & critical point dried, photographer: Sam, S.
  12. aperture - fresh, DMP & critical point dried, photographer: Sam, S.
  13. exine surface - fresh, DMP & critical point dried, photographer: Sam, S.
  14. dry pollen grains - dry, sputter coated with gold, photographer: Sam, S.
  15. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Sam, S.
  16. anther wall with Ubisch bodies - fresh, DMP & critical point dried, photographer: Sam, S.
  17. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  18. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  19. pollen wall at transition of aperture and interapertural area - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  20. vegetative nucleus (right) and sperm cell - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.

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:

Sam S., Heigl H. 2021. Secale cereale. In: PalDat - A palynological database. https://www.paldat.org/pub/Secale_cereale/304794;jsessionid=4AA78EDF54BDF118B49502A432DD682D; accessed 2021-10-17

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