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PalDat - Palynological Database

an online publication on recent pollen

Ranunculus acris

Taxonomy: Angiospermae, Ranunculales, Ranunculaceae, Ranunculus

Published: 2016-10-21

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): small (10-25 µm),  pollen class: colpate,  polarity: isopolar,  shape: spheroidal,  outline in polar view: circular,  shape (dry pollen): spheroidal,  outline in polar view (dry pollen): circular,  infoldings (dry pollen): aperture(s) sunken,  aperture number: 6,  aperture type: colpus,  aperture condition: colpate, hexacolpate, pantocolpate,  aperture peculiarities: aperture membrane ornamented, pantoaperturate

Ornamentation and Structure

LMornamentation LM: echinate,  nexine: -,  sexine: -,  SEMornamentation SEM: microechinate, perforate,  TEMtectum: eutectate,  infratectum: columellate,  foot layer: continuous,  endexine: compact-discontinuous,  intine: monolayered,  wall peculiarities: -

Miscellaneous

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

Annotations

number of colpi varies from 6 to 12; perforations mainly located at base of echini

Author(s) of diagnosis: Auer, Angelika

Pictures

flower(s)

1. flower(s)

polar view (proximal)

2. polar view (proximal)

optical section

3. optical section

polar view (distal)

4. polar view (distal)

pollen grain with generative cell (asterisk) and vegetative nucleus

5. pollen grain with generative cell (asterisk) and vegetative nucleus

polar view

6. polar view

equatorial view

7. equatorial view

detail of colpus membrane

8. detail of colpus membrane

exine surface

9. exine surface

polar view (dry pollen grain)

10. polar view (dry pollen grain)

dry pollen grain in equatorial view

11. dry pollen grain in equatorial view

interapertural area of pollen wall, intine (I), endexine (E)

12. interapertural area of pollen wall, intine (I), endexine (E)

apertural area of pollen wall, intine (I), endexine (E)

13. apertural area of pollen wall, intine (I), endexine (E)

pollen wall (bottom) and tapetum cells with Ubisch bodies (U)

14. pollen wall (bottom) and tapetum cells with Ubisch bodies (U)

Picture legend

  1. flower(s), photographer: Auer, A.
  2. polar view (proximal) - fresh, acetolyzed, unstained, photographer: Auer, A.
  3. optical section - fresh, acetolyzed, unstained, photographer: Auer, A.
  4. polar view (distal) - fresh, acetolyzed, unstained, photographer: Auer, A.
  5. pollen grain with generative cell (asterisk) and vegetative nucleus - fixed, formalin-acetic-alcohol, aceto-carmine, photographer: Auer, A.
  6. polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Auer, A.
  7. equatorial view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Auer, A.
  8. detail of colpus membrane - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Auer, A.
  9. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Auer, A.
  10. polar view (dry pollen grain) - dry, sputter coated with gold, photographer: Auer, A.
  11. dry pollen grain in equatorial view - dry, sputter coated with gold, photographer: Auer, A.
  12. interapertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Auer, A.
  13. apertural area of pollen wall, intine (I), endexine (E) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Auer, A.
  14. pollen wall (bottom) and tapetum cells with Ubisch bodies (U) - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Auer, A.

Literature

  • Bergström G, Dobson HEM, Groth I (1995) Spatial fragrance patterns within the flowers of Ranunculus acris (Ranunculaceae). Pl Syst Evol 195: 221-242
  • Fernández I (1985) Morfologia polinica de Ranunculus arvensis L. Anales Asoc Palin Lengua Esp 2: 19-23
  • Oberschneider W (1998) Pollenmorphologie der Ranunculanae. Diplomarbeit. Universität Wien : 125 pp
  • Roland F (1971) Characterization and extraction of the polysaccharides of the intine of the generative cell wall in the pollen grains of some Ranunculaceae. Grana 11: 101-106
  • Turala-Szybowska K (1994) Syncytes in the secretory anthers' tapetum of Ranunculus peltatus (Ranunculaceae). Polish Bot Stud 8: 23-30
  • 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:

Auer A. 2016. Ranunculus acris. In: PalDat - A palynological database. https://www.paldat.org/pub/Ranunculus_acris/301690;jsessionid=28F1C236B579AE926CB7A6FF5D896367; accessed 2018-11-13

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