Rhododendron luteum
Taxonomy: Angiospermae, Ericales, Ericaceae, Rhododendron
Links: http://flora.nhm-wien.ac.at/Seiten-Arten/Rhododendron-luteum.htm
Published: 2021-03-03
Pollen Description
Shape, Size and Aperture
pollen unit: tetrad, dispersal unit and peculiarities: tetrad tetrahedral, size (pollen unit): large (51-100 µm), size of hydrated pollen (LM): 51-100 µm, shortest polar axis in equatorial view (LM): -, longest polar axis in equatorial view (LM): -, shortest diameter in equatorial or polar view (LM): 51-100 µm, longest diameter in equatorial or polar view (LM): 51-100 µm, pollen class: colporate, polarity: heteropolar, P/E-ratio: -, shape: -, outline in polar view: circular, dominant orientation (LM): oblique, P/E-ratio (dry pollen): -, shape (dry pollen): -, outline in polar view (dry pollen): -, infoldings (dry pollen): interapertural area sunken, aperture number: 3, aperture type: colporus, aperture condition: tricolporate, colporate, aperture peculiarities: -
Ornamentation and Structure
LM ornamentation LM: fossulate, reticulate, nexine: -, sexine: -, SEM ornamentation SEM: fossulate, suprasculpture SEM: -, TEM tectum: -, infratectum: -, foot layer: -, endexine: -, intine: -, wall peculiarities: viscin threads, supratectal element: -
Miscellaneous
pollen coatings: -, reserves in cytoplasm: -, cell number: -, Ubisch bodies: -
Author(s) of diagnosis: Halbritter, Heidemarie; Auer, Waltraud
Pictures
1. hydrated pollen
2. hydrated pollen
3. hydrated pollen
4. tetrads connected by viscin threads
5. polar view of tetrad
6. detail of aperture with viscin threads
7. detail of viscin thread
8. dry tetrads
Picture legend
- hydrated pollen - fresh, glycerine, unstained, photographer: Auer, W.
- hydrated pollen - fresh, glycerine, unstained, photographer: Auer, W.
- hydrated pollen - fresh, glycerine, ruthenium red, photographer: Auer, W.
- tetrads connected by viscin threads - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- polar view of tetrad - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- detail of aperture with viscin threads - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- detail of viscin thread - fresh, rehydrated (water) & critical point dried & sputter coated with gold, photographer: Halbritter, H.
- dry tetrads - dry, sputter coated with gold, photographer: Halbritter, H.
Literature
- () The development of pollen and viscin strands in Rhododendron catawbiense. Bull Torrey Bot Club 57: 285-313
- (1978) A preliminary synopsis of the genus Rhododendron: II. Notes Roy Bot Gard Edinburgh 36: 105-126
- (1987) Association of the generative cell and vegetative nucleus in pollen tubes of Rhododendron. Ann Bot 59: 227-235
- (1995) Bumble bee-initiated vibration release mechanism of Rhododendron pollen. Amer J Bot 82: 1407-1411
- (1991) Gliederung, Verbreitung und Entstehung der Gattung Rhododendron - Eine Synthese aus botanischer, paläobotanischer und geologischer Sicht. Feddes Rep 102: 1-2, 11-28
- (1992) A scanning electron microscope study of the pollen tube pathway in pistils of Rhododendron. Can J Bot 70: 1039-1060
- (1989) The male germ unit of Rhododendron: quantitative cytology, three-dimensional reconstruction, isolation and dedection using fluorescent probes. Sex Pl Reprod 2: 254-264
- (1996) The morphology of pollen tetrads and viscin threads in some Tertiary, Rhododendron-like Ericaceae. Grana 35: 285-294
- (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., Auer W. 2021. Rhododendron luteum. In: PalDat - A palynological database. https://pc8.botanik.univie.ac.at/pub/Rhododendron_luteum/305511; accessed 2025-04-28