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PalDat - Palynological Database

an online publication on recent pollen

Geranium robertianum

Taxonomy: Spermatophyta, Geraniales, Geraniaceae, Geranium

Published: 2013-06-03

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): medium-sized (26-50 µm),  pollen class: colporate,  polarity: isopolar,  shape: oblate,  outline in polar view: circular,  shape (dry pollen): prolate,  outline in polar view (dry pollen): circular,  infoldings (dry pollen): aperture(s) sunken,  aperture number: 3,  aperture type: colporus,  aperture condition: -,  aperture peculiarities: -

Ornamentation and Structure

LMornamentation LM: reticulate, clavate,  nexine: -,  sexine: -,  SEMornamentation SEM: reticulate, clavate,  TEMtectum: semitectate,  infratectum: columellate,  foot layer: perforate,  endexine: absent,  intine: monolayered,  wall peculiarities: -

Miscellaneous

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

Annotations

bubble-like apertural intine protrusions with starch grains inside

starch grains in apertural chambers not involved in pollen tube growth

Author(s) of diagnosis: Halbritter, H.

Pictures

flower(s)

1. flower(s)

germinating pollen grains (on stigma)

2. germinating pollen grains (on stigma)

pollen grain in polar view with starch grains (dark stained) in cytoplasm and apertural protrusions

3. pollen grain in polar view with starch grains (dark stained) in cytoplasm and apertural protrusions

polar view

4. polar view

exine surface

5. exine surface

bubble-like protrusion at the aperture

6. bubble-like protrusion at the aperture

pollen wall with perforated footlayer, exine cavities filled with pollen coating vesicles (PCV)

7. pollen wall with perforated footlayer, exine cavities filled with pollen coating vesicles (PCV)

pollen wall coated with pollenkitt and pollen coating vesicles (PCV)

8. pollen wall coated with pollenkitt and pollen coating vesicles (PCV)

Picture legend

  1. flower(s), photographer: Halbritter, H.
  2. germinating pollen grains (on stigma) - fresh, photographer: Weber, M.
  3. pollen grain in polar view with starch grains (dark stained) in cytoplasm and apertural protrusions - fresh, photographer: Weber, M.
  4. polar view - fresh, DMP & critical point dried, photographer: Weber, M.
  5. exine surface - fresh, DMP & critical point dried, photographer: Weber, M.
  6. bubble-like protrusion at the aperture, glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
  7. pollen wall with perforated footlayer, exine cavities filled with pollen coating vesicles (PCV), glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.
  8. pollen wall coated with pollenkitt and pollen coating vesicles (PCV), glutaraldehyde & osmium & potassium ferrocyanide, modified Thiéry-test, photographer: Weber, M.

Literature

  • Weber M (1996) Apertural chambers in Geranium: development and ultrastructure. Sex Pl Reprod 9: 102-109
  • Weber M (1996) The existence of a special exine coating in Geranium robertianum pollen. Int J Plant Sci 157: 195-202

Copyright and Citation

Cite this publication as:

Halbritter H., Weber M. 2013. Geranium robertianum. In: PalDat - A palynological database. https://www.paldat.org/pub/Geranium_robertianum/216509;jsessionid=6BD5FB6C08A33A51056F55C846D21370; accessed 2019-05-21

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