Hyperdermium: a new clavicipitalean genus for some tropical epibionts of dicotyledonous plants

Citation
Rf. Sullivan et al., Hyperdermium: a new clavicipitalean genus for some tropical epibionts of dicotyledonous plants, MYCOLOGIA, 92(5), 2000, pp. 908-918
Citations number
36
Categorie Soggetti
Plant Sciences
Journal title
MYCOLOGIA
ISSN journal
00275514 → ACNP
Volume
92
Issue
5
Year of publication
2000
Pages
908 - 918
Database
ISI
SICI code
0027-5514(200009/10)92:5<908:HANCGF>2.0.ZU;2-A
Abstract
The morphological characteristics of two tropical clavicipitalean fungi on species of the plant family Asteraceae were examined. These species were fo und to be superficial on the stems of living plants but early stages of inf ection involve necrotrophy of scale insects. These fungi are distinct from other Clavicipitaceae by possession of anamorphs producing multiseptate con idia. A new genus, Hyperdermium , was proposed to accommodate these ttwo sp ecies. In cultures on potato dextrose agar overlaid with cellulose acetate sheets, both species produced colonies resembling those on plant tissues. H yperdermium bertonii produced conidia in culture but not perithecia. Hyperd ermium pulvinatum produced both conidia and perithecia in culture. Phylogen etic analysis using large subunit rDNA sequences placed Hyperdermium in the subfamily Cordycipitoideae. A study was made of perithecial ontogeny in H. pulvinatum. Centrum development was of the Epichloe-type.