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PalDat - Palynological Database

an online publication on recent pollen

Avenula pubescens

Taxonomy: Angiospermae, Poales, Poaceae, Avenula

Published: 2016-08-08

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: ulcerate,  polarity: heteropolar,  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: 1,  aperture type: ulcus,  aperture condition: ulcerate,  aperture peculiarities: operculum, annulus

Ornamentation and Structure

LM  ornamentation LM: scabrate,  nexine: -,  sexine: -,  SEM  ornamentation SEM: microechinate,  suprasculpture SEM: -,  TEM  tectum: 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: Sam, Saskia

Pictures

flowers of Avenula pubescens

1. flowers of Avenula pubescens

upper focus

2. upper focus

optical section

3. optical section

lower focus

4. lower focus

vegetative cell and sperm cells

5. vegetative cell and sperm cells

slightly oblique polar view

6. slightly oblique polar view

equatorial view

7. equatorial view

aperture

8. aperture

exine surface

9. exine surface

dry pollen grains

10. dry pollen grains

dry pollen grains

11. dry pollen grains

anther wall with Ubisch bodies

12. anther wall with Ubisch bodies

interapertural area of pollen wall

13. interapertural area of pollen wall

apertural area of pollen wall

14. apertural area of pollen wall

Picture legend

  1. flowers of Avenula pubescens, photographer: Sam, S.
  2. upper focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  3. optical section - fresh, acetolyzed, unstained, photographer: Sam, S.
  4. lower focus - fresh, acetolyzed, unstained, photographer: Sam, S.
  5. vegetative cell and sperm cells - fresh, unfixed, aceto-carmine, photographer: Sam, S.
  6. slightly oblique polar view - fresh, DMP & critical point dried, photographer: Sam, S.
  7. equatorial view - fresh, DMP & critical point dried, photographer: Sam, S.
  8. aperture - fresh, DMP & critical point dried, photographer: Sam, S.
  9. exine surface - fresh, DMP & critical point dried, photographer: Sam, S.
  10. dry pollen grains - dry, sputter coated with gold, photographer: Sam, S.
  11. dry pollen grains - dry, sputter coated with gold, photographer: Sam, S.
  12. anther wall with Ubisch bodies - fresh, DMP & critical point dried, photographer: Sam, S.
  13. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  14. apertural area of pollen wall - 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. 2016. Avenula pubescens. In: PalDat - A palynological database. https://www.paldat.org/pub/Avenula_pubescens/301285; accessed 2024-11-01

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