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an online publication on recent pollen

Tilia euchlora

Taxonomy: Angiospermae, Malvales, Malvaceae, Tilia

Published: 2020-08-03

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): 36-40 µm,  shortest polar axis in equatorial view (LM): 26-30 µm,  longest polar axis in equatorial view (LM): 36-40 µm,  shortest diameter in equatorial or polar view (LM): 36-40 µm,  longest diameter in equatorial or polar view (LM): 36-40 µm,  pollen class: colporate,  polarity: isopolar,  P/E-ratio: oblate,  shape: -,  outline in polar view: circular,  dominant orientation (LM): oblique,  P/E-ratio (dry pollen): oblate,  shape (dry pollen): -,  outline in polar view (dry pollen): circular,  infoldings (dry pollen): irregularly infolded,  aperture number: 3,  aperture type: colporus,  aperture condition: colporate, tricolporate,  aperture peculiarities: aperture membrane ornamented, brevicolporus, oncus

Ornamentation and Structure

LMornamentation LM: reticulate,  nexine: -,  sexine: -,  SEMornamentation SEM: microreticulate, perforate,  suprasculpture SEM: -,  TEMtectum: -,  infratectum: -,  foot layer: -,  endexine: -,  intine: -,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Annotations: dry pollen irregularly infolded to cup-shaped

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

Pictures

habitus of Tilia euchlora

1. habitus of Tilia euchlora

flowers of Tilia euchlora

2. flowers of Tilia euchlora

upper focus

3. upper focus

optical section

4. optical section

lower focus

5. lower focus

pollen grain with generative cell and vegetative nucleus

6. pollen grain with generative cell and vegetative nucleus

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

exine surface

14. exine surface

dry pollen grains

15. dry pollen grains

polar view (dry pollen grain)

16. polar view (dry pollen grain)

anther wall with Ubisch bodies

17. anther wall with Ubisch bodies

Picture legend

  1. habitus of Tilia euchlora, photographer: Sam, S.
  2. flowers of Tilia euchlora, 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 generative cell and vegetative nucleus - 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. 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. exine surface - fresh, DMP & critical point dried, photographer: Sam, S.
  15. dry pollen grains - dry, sputter coated with gold, photographer: Sam, S.
  16. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Sam, S.
  17. anther wall with Ubisch bodies - fresh, DMP & critical point dried, photographer: Sam, S.

Literature

  • Anderson GJ (1976) The pollination biology of Tilia. Amer J Bot 63: 1203-1212
  • Chambers TC, Godwin H (1961) The fine structure of the pollen wall of Tilia platyphyllos. New Phytol 3?: 393-399
  • Chambers TC, Godwin H (1971) Scanning electron microscopy of Tilia pollen. New Phytol 70: 687-692
  • Hesse M (1993) Pollenkitt development and composition in Tilia platyphyllos (Tiliaceae) analysed by conventional and energy filtering TEM. Pl Syst Evol, Suppl 7: 39-52
  • 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., Auer W. 2020. Tilia euchlora. In: PalDat - A palynological database. https://www.paldat.org/pub/Tilia_euchlora/303766;jsessionid=EB437363A126C650A4FC3EBFAF129275; accessed 2020-10-28

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