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PalDat - Palynological Database

an online publication on recent pollen

Ledum groenlandicum

Taxonomy: Angiospermae, Ericales, Ericaceae, Ledum

Published: 2020-11-24

Pollen Description

Shape, Size and Aperture

pollen unit: tetrad,  dispersal unit and peculiarities: tetrad tetrahedral,  size (pollen unit): medium-sized (26-50 µm),  size of hydrated pollen (LM): 31-35 µm,  shortest polar axis in equatorial view (LM): 31-35 µm,  longest polar axis in equatorial view (LM): 31-35 µm,  shortest diameter in equatorial or polar view (LM): 31-35 µm,  longest diameter in equatorial or polar view (LM): 31-35 µm,  pollen class: tetrad,  polarity: heteropolar,  P/E-ratio: -,  shape: -,  outline in polar view: circular,  dominant orientation (LM): oblique,  P/E-ratio (dry pollen): -,  shape (dry pollen): -,  outline in polar view (dry pollen): irregular,  infoldings (dry pollen): interapertural area sunken,  aperture number: 3,  aperture type: colporus,  aperture condition: colporate, tricolporate,  aperture peculiarities: -

Ornamentation and Structure

LMornamentation LM: psilate,  nexine: -,  sexine: -,  SEMornamentation SEM: fossulate,  suprasculpture SEM: -,  TEMtectum: -,  infratectum: -,  foot layer: -,  endexine: -,  intine: -,  wall peculiarities: viscin threads,  supratectal element: -

Miscellaneous

pollen coatings: -,  reserves in cytoplasm: -,  cell number: -,  Ubisch bodies: -

Annotations: tetrads often irregular, not strictly tetrahedral; many aborted pollen grains; only a few viscin threads

Author(s) of diagnosis: Halbritter, Heidemarie; Heigl, Helmut

Pictures

habitus

1. habitus

flower(s)

2. flower(s)

hydrated pollen

3. hydrated pollen

hydrated pollen

4. hydrated pollen

hydrated pollen

5. hydrated pollen

hydrated tetrads

6. hydrated tetrads

hydrated tetrad

7. hydrated tetrad

hydrated tetrad

8. hydrated tetrad

apertures

9. apertures

exine surface

10. exine surface

polar area

11. polar area

viscin thread

12. viscin thread

dry tetrads

13. dry tetrads

Picture legend

  1. habitus, photographer: Buchner, R.
  2. flower(s), photographer: Buchner, R.
  3. hydrated pollen - fresh, glycerine, unstained, photographer: Heigl, H.
  4. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  5. hydrated pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
  6. hydrated tetrads - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  7. hydrated tetrad - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  8. hydrated tetrad - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  9. apertures - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  10. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  11. polar area - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  12. viscin thread - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  13. dry tetrads - dry, sputter coated with gold, photographer: Halbritter, H.

Literature

  • 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., Heigl H., Buchner R. 2020. Ledum groenlandicum. In: PalDat - A palynological database. https://www.paldat.org/pub/Ledum_groenlandicum/305767;jsessionid=8E2BE02FE39D8C85907F3502EA286904; accessed 2024-03-29

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