Alnus incana
Taxonomy: Angiospermae, Fagales, Betulaceae, Alnus
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Alnus-incana.htm
Published: 2020-08-03
Pollen Description
Shape, Size and Aperture
pollen unit: monad, dispersal unit and peculiarities: monad, size (pollen unit): small (10-25 µm), size of hydrated pollen (LM): 21-25 µm, shortest polar axis in equatorial view (LM): 16-20 µm, longest polar axis in equatorial view (LM): 21-25 µm, shortest diameter in equatorial or polar view (LM): 21-25 µm, longest diameter in equatorial or polar view (LM): 21-25 µm, pollen class: porate, polarity: isopolar, P/E-ratio: oblate, shape: -, outline in polar view: circular, dominant orientation (LM): oblique, P/E-ratio (dry pollen): oblate, shape (dry pollen): -, outline in polar view (dry pollen): polygonal, infoldings (dry pollen): interapertural area sunken, aperture number: 5, aperture type: porus, aperture condition: porate, tetraporate, aperture peculiarities: stephanoaperturate
Ornamentation and Structure
LM ornamentation LM: psilate, nexine: -, sexine: -, SEM ornamentation SEM: microrugulate, microechinate, suprasculpture SEM: -, TEM tectum: -, infratectum: -, foot layer: -, endexine: -, intine: -, wall peculiarities: arcus, supratectal element: -
Miscellaneous
pollen coatings: -, reserves in cytoplasm: -, cell number: -, Ubisch bodies: present
Annotations: aperture number: mostly 4, but also 5; aperture condition: porate or brevicolpate
Author(s) of diagnosis: Halbritter, Heidemarie; Heigl, Helmut
Pictures
Picture legend
- flower(s), photographer: Halbritter, H.
- hydrated Pollen - fresh, glycerine, unstained, photographer: Heigl, H.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- hydrated Pollen - fresh, glycerine, ruthenium red, photographer: Heigl, H.
- polar view - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- equatorial view - 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.
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:
Halbritter H., Heigl H. 2020. Alnus incana. In: PalDat - A palynological database. https://www.paldat.org/pub/Alnus_incana/303763;jsessionid=9739D47328E17A4B06A21F05F3A1FF91; accessed 2024-11-01