Ustilaginomycetes on Osmunda

Citation
R. Bauer et al., Ustilaginomycetes on Osmunda, MYCOLOGIA, 91(4), 1999, pp. 669-675
Citations number
17
Categorie Soggetti
Plant Sciences
Journal title
MYCOLOGIA
ISSN journal
00275514 → ACNP
Volume
91
Issue
4
Year of publication
1999
Pages
669 - 675
Database
ISI
SICI code
0027-5514(199907/08)91:4<669:UOO>2.0.ZU;2-S
Abstract
Sporulation, septal pore apparatus and host-parasite interaction between Us tilago osmundae and its host, the royal fern, were analyzed by light and el ectron microscopy using herbarium material and compared with findings in ot her species of Basidiomycota. The fungus produced thick-walled and thin-wal led hyphae on leaf surfaces and sporulated externally. Coralloid haustoria with numerous lobes were present only in epidermal cells. Hyphae in interce llular spaces were lacking. The septal pore apparatus was composed of a sim ple pore with two caps. Ustilago osmundae shares the type of septal pore ap paratus and host-parasite interaction with the Melanotaeniaceae of Ustilagi nomycetes. It differs from the other species of this family primarily in th e external sporulation and in the lack of intercellular hyphae. To accomoda te this unusual fungus in Melanotaeniaceae a new genus, Exoteliospora, is p roposed. Description and illustrations are given for Exoteliospora osmundae .