Combresomyces cornifer gen. sp. nov., an endophytic peronosporomycete in Lepidodendron from the Carboniferous of central France.
Mycol Res
; 112(Pt 9): 1107-14, 2008 Sep.
Article
in En
| MEDLINE
| ID: mdl-18692373
Structurally preserved periderm of the lycophyte Lepidodendron rhodumnense from the Visean (Mississippian) of central France contains a peronosporomycete (Combresomyces cornifer gen. sp. nov.) that occurs in the form of pyriform to subglobose terminal oogonia. On the surface is a conspicuous ornamentation, which may have formed through condensation of a mucilaginous extra-oogonial wall secretion. Some oogonia contain thin-walled spherules, which may represent (walled) oospheres or spores of an endoparasitic fungus (?chytrid), whereas single, large spheres in the interior are interpreted as oospores. Antheridia adpressed to several of the specimens are clavate and paragynous. This discovery sheds light on the morphology and biology of peronosporomycetes in a terrestrial ecosystem some 330My ago. Although the organism occurs exclusively in the periderm of L. rhodumnense, it is not known whether it represents a symptomless endophyte, pathogen, or saprotroph.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oomycetes
/
Bryophyta
/
Fossils
Country/Region as subject:
Europa
Language:
En
Journal:
Mycol Res
Journal subject:
MICROBIOLOGIA
Year:
2008
Type:
Article
Affiliation country:
Germany