Host specificity in the Botryosphaeriaceae: A case study in the Western Balkans

1. Milica Zlatković , of Lowland Forestry and Environment (ILFE), University of Novi Sad, Novi Sad, Serbia
2. Michael J Wingfield , Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (F, South Africa
3. Fahimeh Jami , Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (F, South Africa
4. Bernard Slippers , Department of Genetics, FABI, University of Pretoria, Pretoria, South Africa

The Botryosphaeriaceae (Ascomycota: Botryosphaeriales) represents a well-known family of endophytes and fungal pathogens of trees. This study aimed to consider the host range and distribution of these fungi by sampling diseased ornamental and forest trees and shrubs in Serbia, Montenegro, Bosnia and Herzegovina, spanning a Mediterranean and a Continental climatic region. Ten species of the Botryosphaeriaceae were identified and with the exception of Sphaeropsis visci and Phaeobotryon cupressi, which occurred on one host, all the species occurred on two or more hosts. Phaeobotryon cupressi was present only in the Mediterranean region and S. visci, Dothiorella sp., Dothiorella sarmentorum and Diplodia seriata were found only in the Continental region. Pathogenicity tests were conducted on seedlings of 27 tree species and cut branches of six tree species from which the Botryosphaeriaceae were isolated. In addition, seedlings of Pinus patula and Eucalyptus grandis were also inoculated as hosts from which these isolates were not isolated. Inoculations showed that with exception of S. visci, P. cupressi and Dothiorella sp. all the rest of these fungi are not host specific, causing disease on various tree species, including those from which they have not been isolated. The results suggest that a combination of environmental and host factors affect the diversity and distribution of the Botryosphaeriaceae in the Western Balkans

Ključne reči: Botryosphaeriales; host range; generalist pathogen; co-infection

Tematska oblast: Zaštita šuma

Datum: 23.10.2017.

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