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PalDat - Palynological Database

an online publication on recent pollen

Populus alba

Taxonomy: Angiospermae, Malpighiales, Salicaceae, Populus

Published: 2016-07-13

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): -,  shortest polar axis in equatorial view (LM): -,  longest polar axis in equatorial view (LM): -,  shortest diameter in equatorial or polar view (LM): -,  longest diameter in equatorial or polar view (LM): -,  pollen class: inaperturate,  polarity: isopolar,  P/E-ratio: -,  shape: spheroidal,  outline in polar view: circular,  dominant orientation (LM): -,  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

LM  ornamentation LM: scabrate,  nexine: -,  sexine: -,  SEM  ornamentation SEM: microreticulate, microechinate,  suprasculpture SEM: -,  TEM  tectum: semitectate,  infratectum: columellate,  foot layer: continuous,  endexine: absent,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Author(s) of diagnosis: Diethart, Bernadette

Pictures

pollen grain with generative cell

1. pollen grain with generative cell

upper focus

2. upper focus

optical section

3. optical section

lower section

4. lower section

hydrated pollen grain

5. hydrated pollen grain

exine surface

6. exine surface

dry pollen grains

7. dry pollen grains

dry pollen grain

8. dry pollen grain

anther wall with Ubisch bodies

9. anther wall with Ubisch bodies

interapertural area of pollen wall

10. interapertural area of pollen wall

vegetative nucleus (left) and generative cell (right)

11. vegetative nucleus (left) and generative cell (right)

Ubisch bodies on inner anther wall

12. Ubisch bodies on inner anther wall

Picture legend

  1. pollen grain with generative cell - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
  2. upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  3. optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  4. lower section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  5. hydrated pollen grain - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  6. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  7. dry pollen grains - dry, sputter coated with gold, photographer: Diethart, B.
  8. dry pollen grain - dry, sputter coated with gold, photographer: Diethart, B.
  9. anther wall with Ubisch bodies - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  10. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, lipid-test, photographer: Diethart, B.
  11. vegetative nucleus (left) and generative cell (right) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  12. Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, 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. 2016. Populus alba. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Populus_alba/301224;jsessionid=BE37A29FD895B1D8D93DABC88D7E1724; accessed 2025-01-25

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