Kedves Miklós; Kincsek Irén: Biopolymer organization of the wall of the fossil spores and pollen grains. In: Plant cell biology and development, (4). pp. 26-33. (1993)
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Absztrakt (kivonat)
The transmission electronmicroscopical data of the laboratory prepared from 1969 on fossil spores and pollen grains were reinvestigated from the point of view of the degree of the degradation of the sporoderm. This work taxonomically includes the following: 23 form-species of Pteridophyta spores, 16 form-species of Gymnospermatophyta, and 75 form-species of Angiospermatophyta pollen grains. During the evaluation of the TEM data the following points of view were taken into consideration: Locality, geological age, embedding rock, resolution power of the used TEM instrument, presence of the basic biopolymer unit, highly organized globular units and the superficial biopolymer differentiations. The following was established: 1. The wall of the Pteridophyta spores is extremely resistant, 2. Gymnospermatophyta pollen grains are heterogeneous in this respect. The basic and highly organized biopolymer system was observed on the ectexine and endexine of Balmeiopsis limbatus. Saccate pollen grains are extremely resistant after a fossilization process. 3. The biopolymer systems of Angiospermatophyta pollen grains are much more complex in contrast to the previous ones. The exines of Longaxones pollen grains as the early types are more resistant than the more developed Brevaxonate ones. Typical regular pentagonal basic units and highly organized globules are simultaneously observed at the exines of Thomsonipollis and Restioniidites from the Eocene layers of the Mississippi, USA.
| Mű típusa: | Cikk, tanulmány, mű |
|---|---|
| Befoglaló folyóirat/kiadvány címe: | Plant cell biology and development |
| Dátum: | 1993 |
| Kötet: | 4 |
| ISSN: | 0866-5443 |
| Oldalak: | pp. 26-33 |
| Nyelv: | angol |
| Kiadás helye: | Szeged |
| Befoglaló mű URL: | http://acta.bibl.u-szeged.hu/46853/ |
| Kulcsszavak: | Palinológia, Paleobotanika, Sejtbiológia - molekuláris - biopolimerek |
| Megjegyzések: | Bibliogr.: 33. p. ; ill. ; összefoglalás angol nyelven |
| Szakterület: | 01. Természettudományok 01. Természettudományok > 01.06. Biológiai tudományok |
| Feltöltés dátuma: | 2017. júl. 13. 13:35 |
| Utolsó módosítás: | 2026. jan. 21. 08:20 |
| URI: | http://acta.bibl.u-szeged.hu/id/eprint/47787 |
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