Diskussion:Peucedanum venetum: Unterschied zwischen den Versionen

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'''Pollen (tricolporate):''' Size 25 (22.4-26.1); 14 (11.6-15.5) &mu;m. Polygonal or slightly triangular, prolate (PoFormI ca. 1.66-2.07), tricolporate, isopolar, verrucate. Aperture membranes are not ornamented. Long colpi.
'''Pollen (bicolporate, twin-mutation):''' Size: 24 (20.0-27.8) μm; 15 (13.1-16.7) μm. Rectangular to ovale, prolate (PoFormI ca. 1.40-1.93), dicolporate, heteropolar, verrucate. Aperture membranes are not ornamented. Long colpi. Pore diameter about 3.2 (2.9-3.7) μm. After a new sampling, no bicolporate pollen could be found any more.
'''Abstract:''' Peucedanum venetum belongs to the family of the Apiaceae. This family shows a very characteristic rod-shaped (prolate) pollen with three germination openings (tricolporate). In polar view the shape of this pollen is slightly triangular. In pollen samples of this species, pollen very different from the basic form of the Apiaceae was found. These samples were prolate also but showed only two germination openings (dicolporate). In polar view the outline was elliptic with distinct constrictions on the two longer sides. This deviation of the usual pollen form might be triggered by local mutations or by disturbances during pollen development.<br />
[[:File:Peucedanum venetum-Mikroskopie 1-2017.pdf|See also: Ungewöhnliche Pollenform bei Peucedanum venetum, Zeitschrift "Mikroskopie", Nr. 1, 2017, S. 40-43]]
[[File:Peucedanum venetum tricolporat.jpg|Peucedanum venetum tricolporat.jpg]]
[[File:Peucedanum venetum dicolporat.jpg|Peucedanum venteum Bicolporate]]
[[File:Peucedanum venetum-REM.jpg|Von: Dr. Martina Weber Department of Structural & Functional Botany Pollen Research Group Biodiversity Center University Vienna Rennweg 14 A-1030 Vienna|640px]]
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