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an online publication on recent pollen

Populus tremula

Taxonomy: Angiospermae, Malpighiales, Salicaceae, Populus

Published: 2020-07-29

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): 31-35 µm,  shortest polar axis in equatorial view (LM): -,  longest polar axis in equatorial view (LM): -,  shortest diameter in equatorial or polar view (LM): 26-30 µm,  longest diameter in equatorial or polar view (LM): 31-35 µm,  pollen class: inaperturate,  polarity: isopolar,  P/E-ratio: -,  shape: spheroidal,  outline in polar view: circular,  dominant orientation (LM): oblique,  P/E-ratio (dry pollen): -,  shape (dry pollen): irregular,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): irregularly infolded,  aperture number: none,  aperture type: no aperture,  aperture condition: inaperturate,  aperture peculiarities: -

Ornamentation and Structure

LMornamentation LM: scabrate, verrucate, gemmate,  nexine: -,  sexine: -,  SEMornamentation SEM: microechinate, microreticulate,  suprasculpture SEM: -,  TEMtectum: semitectate,  infratectum: columellate,  foot layer: absent,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

pollen coatings: absent,  reserves in cytoplasm: starch,  cell number: 2-celled,  Ubisch bodies: present

Annotations: exine ruptures irregularly when swelling

Author(s) of diagnosis: Halbritter, Heidemarie; Sam, Saskia; Auer, Waltraud

Pictures

habitus

1. habitus

inflorescence(s)

2. inflorescence(s)

acetolyzed pollen,upper view

3. acetolyzed pollen, upper view

acetolyzed pollen,optical section

4. acetolyzed pollen, optical section

acetolyzed pollen,lower focus

5. acetolyzed pollen, lower focus

generative cell

6. generative cell

hydrated Pollen

7. hydrated Pollen

hydrated Pollen

8. hydrated Pollen

hydrated Pollen

9. hydrated Pollen

hydrated pollen grain

10. hydrated pollen grain

exine surface

11. exine surface

exine surface (more expanded and ruptured)

12. exine surface (more expanded and ruptured)

dry pollen grains

13. dry pollen grains

Ubisch bodies on locule wall

14. Ubisch bodies on locule wall

pollen wall

15. pollen wall

vegetative nucleus and generative cell

16. vegetative nucleus and generative cell

Picture legend

  1. habitus, photographer: Sam, S.
  2. inflorescence(s), photographer: Sam, S.
  3. acetolyzed pollen, upper view - dry, acetolyzed, unstained, photographer: Sam, S.
  4. acetolyzed pollen, optical section - dry, acetolyzed, unstained, photographer: Sam, S.
  5. acetolyzed pollen, lower focus - dry, acetolyzed, unstained, photographer: Sam, S.
  6. generative cell - fresh, unfixed, aceto-carmine, photographer: Sam, S.
  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. hydrated pollen grain - fresh, DMP & critical point dried, photographer: Halbritter, H.
  11. exine surface - fresh, DMP & critical point dried, photographer: Halbritter, H.
  12. exine surface (more expanded and ruptured) - fresh, DMP & critical point dried, photographer: Halbritter, H.
  13. dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
  14. Ubisch bodies on locule wall - fresh, critical point dried & sputter coated with gold, photographer: Sam, S.
  15. pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  16. vegetative nucleus and generative 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:

Halbritter H., Sam S., Auer W. 2020. Populus tremula. In: PalDat - A palynological database. https://www.paldat.org/pub/Populus_tremula/303755;jsessionid=4DC23F1FF2E177B30A1B3290E7154BA0; accessed 2020-08-14

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