Kaj se dogaja z jesenom pri nas?
What is happening with Ash trees in Slovenia region?

slovenian

2010

volume 68, issue 5/6

Zveza gozdarskih društev Slovenije
(Obvezni izvod spletne publikacije)

This paper is a part of ash dieback series. Recent findings regarding molecular evaluation of the causal agent of the ash dieback are presented. Fungus Hymenoscyphus albidus, previously recognized as a sexual stage of the fungus Chalara fraxinea, was according to sequences of three gene regions recognized as a complex of two morphologically similar species: H. albidus and H. pseudoalbidus. The sequence analyses showed that all fungal isolates obtained from symptomatic trees are actually H. pseudoalbidus. In the scope ofresearch projects currently ongoing at the Department of Forest Protection at Slovenian Forestry Institute, a comparison of sequence data of gene regionsEf-alfa in ITS-rDNA revealed that Slovenian isolates are also H. pseudoalbidus. Both species were known in Europe even before the ash dieback outbreak. But it is still an enigma why this until recently harmless endophyteof ash leaves changed into an aggressive pathogen.

30.08.2012