Die evolusie van gametangiofore in Suider - Afrikaanse Marchantiales (Hepaticae): ’ n hipotese
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie/South African Journal of Science and Technology
| Field | Value | |
| Title | Die evolusie van gametangiofore in Suider - Afrikaanse Marchantiales (Hepaticae): ’ n hipotese The evolution of gametangiophores in Southern African Marchantiales (Hepaticae) : a hypothesis | |
| Creator | Perold, S. M. | |
| Description | Die tallusagtige lewermos-orde, Marchantiales, toon sowel ’n groot diversiteit in die gametangiofore (gespesialiseerde gametangiumdraende vertakkings) as in die sporofiete (gewoonlik bestaande uit 'n voet, seta en spoorbevattende kapsel). 'n Poging word aangewend om die filogenie of afstammingsgeskiedenis van die Suider-Afrikaanse lede van die orde na te spoor deur die vermelde strukture by 'n paar sleutelvoorbeelde soos die genusse Oxymitra, Exormotheca, Targionia, Riccia, Lunularia, Asterella, Cryptomitrium en Marchantia te ondersoek en met mekaar te vergelyk. Daar is tot die gevolgtrekking gekom dat daar ’n mosaïek van voorvaderlike en gevorderde kenmerke in die gametangiofore van die aangehaalde voorbeelde is, ook dat ’n afstammingsmodel, waar die stadiums lineêr gerangskik word, onaanvaarbaar is, en dat ’n vertakte tipe konfigurasie meer waarskynlik is. Members of the thallose liverwort order, Marchantiales, display great diversity in their gametangiophores (specialized gametangium-bearing branches), as well as in their sporophytes (typically consisting of a foot, seta and spore-containing capsule). An attempt is made to trace the phylogeny or evolutionary history of Southern African members of the order by examining and comparing the aforementioned structures in a few key examples such as the genera Oxymitra, Exormotheca, Targionia, Riccia, Lunularia, Asterella, Cryptomitrium and Marchantia. It is concluded that there is a mosaic of primitive and advanced characters in the gametangiophores of the examples cited and that a linear mode of descent is not acceptable, but that a branched type of configuration is more probable. | |
| Publisher | AOSIS | |
| Date | 1994-07-09 | |
| Identifier | 10.4102/satnt.v13i1.576 | |
| Source | Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 13, No 1 (1994); 16-20 Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie; Vol 13, No 1 (1994); 16-20 2222-4173 0254-3486 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://journals.satnt.aosis.co.za/index.php/satnt/article/view/576/1032
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