Ulearum sagittatum
Taxonomy: Angiospermae, Alismatales, Araceae, Ulearum
Published: 2016-11-03
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): -, 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: inaperturate, 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: none, aperture type: no aperture, aperture condition: inaperturate, aperture peculiarities: -
Ornamentation and Structure
LM ornamentation LM: echinate, nexine: -, sexine: -, SEM ornamentation SEM: echinate, suprasculpture SEM: -, TEM tectum: -, infratectum: -, foot layer: -, endexine: spongy-continuous, intine: monolayered, wall peculiarities: -, supratectal element: -
Miscellaneous
pollen coatings: pollenkitt, reserves in cytoplasm: polysaccharide vesicles, cell number: -, Ubisch bodies: absent
Annotations: ektexine missing; ornamentation elements not resistant to acetolysis
Author(s) of diagnosis: Weber, Martina; Halbritter, Heidemarie
Pictures
Picture legend
- hydrated pollen grain - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- pollen surface - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- anther with pollen grains in cross section - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- pollen grain in cross section - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
- detail of pollen wall - fresh, glutaraldehyde & osmium & potassium ferrocyanide, uranyl acetate & lead citrate, photographer: Weber, M.
Literature
- (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:
Weber M., Halbritter H. 2016. Ulearum sagittatum. In: PalDat - A palynological database. https://www.paldat.org/pub/Ulearum_sagittatum/301852; accessed 2024-10-31