گزارش بیماری زایی Truncatella angustata روی انگور در استان لرستان

Pathogenicity of Truncatella angustata on grapevine in Lorestan province
In recent years, grapevine trunk diseases have gained growing attentions due to worldwide incidence of the disease. In a stady
on fungal agents with grapevine trunk diseases in in Lorestan province, wood and branches samples were collected from grapevines having the symptoms of declination. Isolation was made using routine plant pathology methods onto potato dextrose agar (PDA). The colonies that appeared on PDA were cottony, dull white to brown in color, with black acervuli mainly in the center of the PDA plates. Based on morphological and cultural characteristics, the causal agent of the disease was identified as Truncatella angustata. Pathogenicity tests performed on detached shoots of grapevines led to the same symptoms as observed in field conditions. The identity of the species was further confirmed by sequence data of internal transcribed spacer-rDNA region. A phylogeny inferred using sequence data obtained in this study, together with the sequences from GenBank, The phylogeny tree was drawn using the sequence data obtained in this study, along with the gene bank sequences. This is first report on the occurrence of T. angustata on grapevine in Lorestan province and West of Iran.
Pathogenicity test, morphological, phylogeny