|White, Jr, James|
Submitted to: Inoculum
Publication Type: Abstract Only
Publication Acceptance Date: 6/12/2006
Publication Date: 7/26/2006
Citation: Sogonov, M.V., Castlebury, L.A., Mejia, L.C., Rossman, A.Y., White, J. F. 2006. Generic trends in the Gnomoniaceae. [Abstract]. 8th International Mycological Congress, Cairns, Australia, Abstracts Book 1, p. 20.
Technical Abstract: The Gnomoniaceae is a common but inconspicuous diaporthalean family of fungi associated with plants. Most occur as symptomless endophytes of hardwood trees, although some can be pathogenic. Host associations in this group usually vary from species to family-level host specificity. Eight species in the Gnomoniaceae are considered specific to hosts in the Juglandaceae, a family of hardwood trees with economic value as wood and nut crops. Of these, Sirococcus clavigignenti-juglandacearum causes butternut (Juglans cinerea) canker and Gnomonia dispora is the causal agent of pecan (Carya pecan) leaf-blotch. Two additional species typically occurring on other hosts have also been reported from hosts in the Juglandaceae. From 2004-2006, 31 specimens of gnomoniaceous fungi on hosts in the Juglandaceae from the eastern U.S. and Canada were collected and examined. In addition to the previously described Gnomonia caryae, G. pecanae and Plagiostoma micromegalum, five apparently undescribed species supported by morphology and ITS sequence data were collected. The results of this work indicate that the diversity of gnomoniaceous fungi associated with the Juglandaceae in North America has been underestimated, in part because fungi in the Gnomoniaceae have not been well studied outside of Europe.