Transmission electron microscopy of the partially degraded pollen grains from the Thanetian layers of Menat (France) I.
Gymnosperm and angiosperm pollen grains were partially degraded with merkaptoethanol during 2.5 and 5 hours, and investigated with the TEM method. The saccate gymnosperm pollen grains (Pityosporites alatus, P. pristinipollinius) are relatively resistant against the experimental and embedding process...
Elmentve itt :
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2000
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| Sorozat: | Plant cell biology and development
12 |
| Kulcsszavak: | Palinológia, Paleobotanika, Sejtbiológia - molekuláris - Franciaország |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/47891 |
| Tartalmi kivonat: | Gymnosperm and angiosperm pollen grains were partially degraded with merkaptoethanol during 2.5 and 5 hours, and investigated with the TEM method. The saccate gymnosperm pollen grains (Pityosporites alatus, P. pristinipollinius) are relatively resistant against the experimental and embedding processes. The tectum and the infratectal layer at the investigated Longaxones (Monocolpopollenites tranquillus, Cupuliferoidaepollenites quisqualis, C. liblarensis, Cupuliferoipollenites insleyanus, C. oviformis, C. pusillus, Retitricolpites thomsonii) taxa are also resistant. The granular infratectal layer of the two Normapolles (Plicapollis, Stephanoporopollenites) taxa is less resistant, in opposition to this, the granular infratectal layer of the Platycaryapollenites (Postnormapolles) is well preserved after the partial dissolution experiment. The resistance of the pollen grains of the recent Platycarya against different kinds of experimental influences was emphasized previously. The ultrastructure of the pollen grains embedding organic material was also investigated and interpreted. |
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| Terjedelem/Fizikai jellemzők: | 40-62 |
| ISSN: | 0866-5443 |