Ultrastructural modifications in Common ash tissues colonised by Chalara fraxinea

Chalara fraxinea, the cause of ash dieback, is present in many European countries and constitutes severe threat to Fraxinus spp. in forests, urban areas and nurseries. This study investigated tissue colonisation strategies of the parasite in Common ash at ultrastructural level and demonstrated that...

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Bibliographic Details
Published in:Phytopathologia mediterranea 2012-12, Vol.51 (3), p.599-606
Main Authors: DAL MASO, Elba, FANCHIN, Genny, MUTTO ACCORDI, Sergio, SCATTOLIN, Linda, MONTECCHIO, Lucio
Format: Article
Language:English
Subjects:
ash dieback
Cell membranes
Cell walls
Chalara
Cytoplasm
Dieback
Forest stands
Fraxinus
Fraxinus excelsior
Fungi
Hymenoscyphus pseudoalbidus
Hyphae
Parasites
Phytopathology
Plant diseases
Plants
Research Papers
Septum
ultrastructure
Urban areas
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Summary:Chalara fraxinea, the cause of ash dieback, is present in many European countries and constitutes severe threat to Fraxinus spp. in forests, urban areas and nurseries. This study investigated tissue colonisation strategies of the parasite in Common ash at ultrastructural level and demonstrated that C. fraxinea develops intracellularly, moving through the cells and easily colonising the phloem, paratracheal parenchyma and parenchymatic rays. However, damage to either the plasmalemma or cell walls was not observed under our experimental conditions. Furthermore, the presence of intrahyphal hyphae was frequently detected, which are likely associated with a regeneration mechanism.
ISSN:0031-9465
1593-2095
DOI:10.14601/Phytopathol_Mediterr-11132