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Link to original content: https://www.paldat.org/pub/Juglans_regia
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PalDat - Palynological Database

an online publication on recent pollen

Juglans regia

Taxonomy: Angiospermae, Fagales, Juglandaceae, Juglans

Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Juglans-regia.htm

Published: 2020-07-29

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): 41-50 µm,  shortest polar axis in equatorial view (LM): 36-40 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: porate,  polarity: isopolar,  P/E-ratio: oblate,  shape: -,  outline in polar view: circular,  dominant orientation (LM): oblique,  P/E-ratio (dry pollen): -,  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, pantoporate,  aperture peculiarities: annulus, aperture membrane ornamented, pantoaperturate

Ornamentation and Structure

LM  ornamentation LM: scabrate, gemmate, verrucate,  nexine: -,  sexine: -,  SEM  ornamentation SEM: microechinate,  suprasculpture SEM: -,  TEM  tectum: eutectate,  infratectum: granular,  foot layer: continuous,  endexine: absent,  intine: monolayered,  wall peculiarities: -,  supratectal element: -

Miscellaneous

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

Annotations: hydrated pollen grains often slightly oblate; pores often more irregularly distributed; most of apertures on equator

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

Pictures

inflorescence of Juglans regia

1. inflorescence of Juglans regia

flowers of Juglans regia

2. flowers of Juglans regia

upper focus

3. upper focus

optical section

4. optical section

lower focus

5. lower focus

pollen grain with vegetative nucleus and generative cell

6. pollen grain with vegetative nucleus and generative cell

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

equatorial view

12. equatorial view

aperture

13. aperture

exine surface

14. exine surface

exine surface

15. exine surface

dry pollen grains

16. dry pollen grains

polar view (dry pollen grain)

17. polar view (dry pollen grain)

interapertural area of pollen wall

18. interapertural area of pollen wall

apertural area of pollen wall

19. apertural area of pollen wall

generative cell (left) and vegetative nucleus (right)

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

Picture legend

  1. inflorescence of Juglans regia, photographer: Halbritter, H.
  2. flowers of Juglans regia, 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 vegetative nucleus and generative cell - 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. equatorial view - fresh, DMP & critical point dried, photographer: Sam, S.
  13. aperture - fresh, DMP & critical point dried, photographer: Sam, S.
  14. exine surface - fresh, DMP & critical point dried, photographer: Sam, S.
  15. exine surface - fresh, DMP & critical point dried, photographer: Sam, S.
  16. dry pollen grains - dry, sputter coated with gold, photographer: Sam, S.
  17. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Sam, S.
  18. interapertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  19. apertural area of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Sam, S.
  20. generative cell (left) and vegetative nucleus (right) - 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:

Halbritter H., Sam S., Auer W. 2020. Juglans regia. In: PalDat - A palynological database. https://www.paldat.org/pub/Juglans_regia/303758;jsessionid=55DEA4F4F9C8864B9D2D2886D554390D; accessed 2024-11-16

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