Submitted to: Phytoparasitica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: May 24, 2010
Publication Date: June 18, 2010
Citation: Dervis, S., Dixon, L.J., Doganlar, M., Rossman, A.Y. 2010. Gall production on hawthorns caused by Gymnosporangium spp.in Hatay province, Turkey. Phytoparasitica. 38:391-400.
Interpretive Summary: Rust fungi are a very large and diverse group of parasites that attack different kinds of plants including crop and native species. Many rust fungi have complicated life cycles in which they occur on unrelated plant hosts. Accurate knowledge of the life cycle of rust fungi is important for determining how to control the diseases they cause. In this research the rust fungi that attack hawthorne and pear in Turkey were sampled throughout the year to determine the periodicity of the stages. It was determined that among rust fungi on different hosts, the stages develop at varying times of the year. This research will be used by plant pathologists and conservationists to control the rust diseases that attack hawthorne and pear plants.
Three hawthorn and related rust diseases caused by Gymnosporangium confusum on Crataegus monogyna, G. clavariiforme on C. orientalis, and G. sabinae on Pyrus communis were detected in Hatay province, Turkey. Gymnosporangium confusum was also found causing telial galls on Juniperus communis. Gymnosporangium confusum and G. clavariiforme produced aecial horns on overwintered galls on hawthorn twigs from April to June. The production of galls caused by Gymnosporangium on the secondary host is unusual. Portions of the nuclear ITS and LSU rDNA were sequenced for all three species of Gymnosporangium. The life cycles of G. confusum and G. clavariiforme are discussed along with implications for disease control.