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), size of hydrated pollen (LM): -, shortest polar axis in equatorial view (LM): -, longest polar axis in equatorial view (LM): -, shortest diameter in equatorial or polar view (LM): -, longest diameter in equatorial or polar view (LM): -, pollen class: porate, polarity: -, P/E-ratio: -, shape: spheroidal, outline in polar view: circular, dominant orientation (LM): -, P/E-ratio (dry pollen): -, 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: operculum, pantoaperturate
Ornamentation and Structure
LM ornamentation LM: echinate, nexine: -, sexine: -, SEM ornamentation SEM: baculate, echinate, suprasculpture SEM: -, TEM tectum: -, infratectum: -, foot layer: -, endexine: -, intine: monolayered, wall peculiarities: -, supratectal element: -
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
1. flower(s)
2. hydrated pollen grain
3. aperture
4. aperture
5. exine surface
6. dry pollen grains
7. interapertural area of pollen wall with pollenkitt on the surface
8. pollen wall, transition from aperture to interapertural area
9. detail of pollen wall at the interapertural area
Picture legend
- flower(s), photographer: Halbritter, H.
- hydrated pollen grain - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- aperture - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- exine surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- dry pollen grains - dry, sputter coated with gold, photographer: Halbritter, H.
- interapertural area of pollen wall with pollenkitt on the surface - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.
- pollen wall, transition from aperture to interapertural area - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.
- detail of pollen wall at the interapertural area - fresh, glutaraldehyde & osmium, uranyl acetate & lead citrate, photographer: Hesse, M.
Literature
- (1993) Tapetum development in Cucurbita pepo (Cucurbitaceae). Pl Syst Evol, Suppl 7: 13-22
- (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
- (1979) Evidence for postmeiotic genetic activity in pollen of Cucurbita species. J Heredity 70: 365-368
- (1995) Development of Cucurbita pepo pollen: ultrastructure and histochemistry of the sporoderm. Can J Bot 73: 1046-1057
- (1993) Pollination, pollen viability and pistil receptivity in Cucurbita pepo. Ann Bot 72: 527-536
- (1992) Mineral analyses of storage reserves of Cucurbita maxima and Cucurbita andreana pollen. Can J Bot 70: 491-495
- (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. 2016. Cucurbita pepo. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Cucurbita_pepo/302526; accessed 2025-04-27