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PalDat - Palynological Database

an online publication on recent pollen

Cucurbita pepo

Taxonomy: Angiospermae, Cucurbitales, Cucurbitaceae, Cucurbita

Published: 2016-11-29

Pollen Description

Shape, Size and Aperture

pollen unit: monad,  dispersal unit and peculiarities: monad,  size (pollen unit): very large (>100 µm),  pollen class: porate,  polarity: -,  shape: spheroidal,  outline in polar view: circular,  shape (dry pollen): spheroidal,  outline in polar view (dry pollen): circular,  infoldings (dry pollen): not infolded,  aperture number: >6,  aperture type: porus,  aperture condition: porate,  aperture peculiarities: pantoaperturate, operculum

Ornamentation and Structure

LMornamentation LM: echinate,  nexine: -,  sexine: -,  SEMornamentation SEM: echinate, baculate,  TEMtectum: -,  infratectum: -,  foot layer: -,  endexine: -,  intine: monolayered,  wall peculiarities: -

Miscellaneous

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

Annotations

strange electron-dense and thick stratum in aperture

Author(s) of diagnosis: Halbritter, Heidemarie; Hesse, Michael

Pictures

flower(s)

1. flower(s)

hydrated pollen grain

2. hydrated pollen grain

aperture

3. aperture

aperture

4. aperture

exine surface

5. exine surface

dry pollen grains

6. dry pollen grains

interapertural area of pollen wall with pollenkitt on the surface

7. interapertural area of pollen wall with pollenkitt on the surface

pollen wall, transition from aperture to interapertural area

8. pollen wall, transition from aperture to interapertural area

detail of pollen wall at the interapertural area

9. detail of pollen wall at the interapertural area

Picture legend

  1. flower(s), photographer: Halbritter, H.
  2. hydrated pollen grain - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  3. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  4. aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  5. exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
  6. dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
  7. interapertural area of pollen wall with pollenkitt on the surface - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.
  8. pollen wall, transition from aperture to interapertural area - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.
  9. detail of pollen wall at the interapertural area - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.

Literature

  • Ciampolini F, Nepi M, Pacini E (1993) Tapetum development in Cucurbita pepo (Cucurbitaceae). Pl Syst Evol, Suppl 7: 13-22
  • Gubatz S, Wiermann R (1993) Studies on sporopollenin biosynthesis in Cucurbita maxima I: the substantial labeling of sporopollenin from Cucurbita maxima after application of [14C] Phenylalanine. Z Naturf 48c: 10-15
  • Mulcahy DL, Mulcahy GB, Robinson RW (1979) Evidence for postmeiotic genetic activity in pollen of Cucurbita species. J Heredity 70: 365-368
  • Nepi M, Ciampolini F, Pacini E (1995) Development of Cucurbita pepo pollen: ultrastructure and histochemistry of the sporoderm. Can J Bot 73: 1046-1057
  • Nepi M, Pacini E (1993) Pollination, pollen viability and pistil receptivity in Cucurbita pepo. Ann Bot 72: 527-536
  • Skilnyk HR, Lott JNA (1992) Mineral analyses of storage reserves of Cucurbita maxima and Cucurbita andreana pollen. Can J Bot 70: 491-495
  • Winsor JA, Stephenson AG (1995) Demographics of pollen tube growth in Cucurbita pepo. Can J Bot 73: 583-589

Copyright and Citation

Cite this publication as:

HALBRITTER H., HESSE M., Cucurbita pepo. In: PalDat (2016-11-29) - a palynological database. Published on the Internet https://www.paldat.org/pub/Cucurbita_pepo/302526;jsessionid=A4C06FD83F361BB5D0756FBA2B1B5436 [accessed 2017-10-19]

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