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an online publication on recent pollen

Ulmus laevis

Taxonomy: Angiospermae, Rosales, Ulmaceae, Ulmus

Published: 2016-11-08

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): medium-sized (26-50 µm),  pollen class: porate,  polarity: heteropolar,  shape: spheroidal,  outline in polar view: circular,  shape (dry pollen): irregular,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): irregularly infolded,  aperture number: 6,  aperture type: porus,  aperture condition: porate,  aperture peculiarities: operculum

Ornamentation and Structure

LMornamentation LM: rugulate,  nexine: -,  sexine: -,  SEMornamentation SEM: rugulate, granulate,  TEMtectum: eutectate,  infratectum: granular,  foot layer: absent,  endexine: compact-continuous,  intine: monolayered,  wall peculiarities: -

Miscellaneous

pollen coatings: absent,  reserves in cytoplasm: starch,  cell number: 3-celled,  Ubisch bodies: present

Annotations

dry pollen irregularely infolded or cup-shaped; endexine not thickened in apertures; ornamentation rugulate to verrucate

Author(s) of diagnosis: Halbritter, Heidemarie; Diethart, Bernadette; Weber, Martina

Pictures

flower(s)

1. flower(s)

flower(s)

2. flower(s)

pollen grain with two sperm cells

3. pollen grain with two sperm cells

upper focus

4. upper focus

optical section

5. optical section

lower focus

6. lower focus

hydrated pollen grains

7. hydrated pollen grains

polar view

8. polar view

polar view; note differences in exine

9. polar view; note differences in exine

aperture

10. aperture

dry pollen grains

11. dry pollen grains

polar view (dry pollen grain)

12. polar view (dry pollen grain)

dry pollen grain in equatorial view

13. dry pollen grain in equatorial view

anther wall with Ubisch bodies

14. anther wall with Ubisch bodies

interapertural area of pollen wall

15. interapertural area of pollen wall

interapertural area of pollen wall

16. interapertural area of pollen wall

interapertural area of pollen wall

17. interapertural area of pollen wall

apertural area of pollen wall

18. apertural area of pollen wall

pollen grain at second pollen mitosis; vegetative nucleus (asterisk)

19. pollen grain at second pollen mitosis; vegetative nucleus (asterisk)

vegetative nucleus and sperm cell

20. vegetative nucleus and sperm cell

vegetative nucleus

21. vegetative nucleus

Ubisch bodies on inner anther wall

22. Ubisch bodies on inner anther wall

Picture legend

  1. flower(s), photographer: Diethart, B.
  2. flower(s), photographer: Diethart, B.
  3. pollen grain with two sperm cells - fresh, unfixed, aceto-carmine, photographer: Diethart, B.
  4. upper focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  5. optical section - fresh, acetolyzed, unstained, photographer: Diethart, B.
  6. lower focus - fresh, acetolyzed, unstained, photographer: Diethart, B.
  7. hydrated pollen grains - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  8. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  9. polar view; note differences in exine - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  10. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  11. dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
  12. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Diethart, B.
  13. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Diethart, B.
  14. anther wall with Ubisch bodies - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Diethart, B.
  15. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
  16. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  17. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  18. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Diethart, B.
  19. pollen grain at second pollen mitosis; vegetative nucleus (asterisk) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
  20. vegetative nucleus and sperm cell - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
  21. vegetative nucleus - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.
  22. Ubisch bodies on inner anther wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Diethart, B.

Literature

  • Lian YH (1982) Apocynaceae, Bignoniaceae, Goodeniaceae, Lardizabalaceae, Menispermaceae, Nyctaginaceae, Papilionaceae, Rubiaceae, Samydaceae, Santalaceae, Sargentodoxaceae, Simaroubaceae, Thymelaeaceae, Ulmaceae. In: Angiosperm pollen flora of tropic and subtropic China. Inst Bot South China : 34-48, 60-65, 165-166, 183-186, 213-217, 244-246, 265-289, 305-325, 335-339, 351, 353-355, 375-377, 381-383
  • Rowley JR, Rowley JS (1986) Ontogenetic development of microspores of Ulmus (Ulmaceae). In: Blackmore S., Ferguson I.K. (eds) Pollen and spores: Form and Function. Acad Press, London : 19-33
  • Stockmarr J (1970) Species identification of Ulmus pollen. Dan Geol Unders 4: 1-19
  • Stockmarr J (1975) SEM studies on pollen grains of Northern European Ulmus species. Grana 14: 103-107
  • Takahashi M (1989) Pollen morphology of Celtidaceae and Ulmaceae: a reinvestigation. In: Evolution, Systematics, and fossil History of the Hamamelidae. Vol 2: 'Higher'
  • Zavada MS, Kim M (1996) Phylogenetic analysis of Ulmaceae. Pl Syst Evol 200: 13-20
  • 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., Diethart B., Weber M. 2016. Ulmus laevis. In: PalDat - A palynological database. https://www.paldat.org/pub/Ulmus_laevis/302066;jsessionid=133CB1EE57ECC1F2ADB2EF9AA7ADCF1E; accessed 2018-11-17

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