First occurrence of Golovinomyces bolayi, the cause of powdery mildew disease on Prickly lettuce (Lactuca serriola) in Iran
نویسندگان
1 Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2 Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
doi
10.22092/mi.2025.370543.1326چکیده
During September–November 2022 and 2023, white, powdery fungal growth was observed on leaves of wild-grown prickly lettuce (Lactuca serriola L.) in the Firouragh county (Khoy, West Azerbaijan Province), Iran. Infected leaves were collected and subjected to morphotaxonomic and phylogenetic analyses. The integration of morphological and molecular characteristics revealed the identity of the species as Golovinomyces orontii species complex. Based on a phylogeny inferred using ITS-rDNA sequences obtained in the present study and sequence data from GenBank, the isolates from prickly lettuce clustered together with G. bolayi from the other Lactuca spp. such as L. sativa and L. serriola. On the members of the genus Lactuca, G. bolayi has been previously reported on L. sativa and L. tuberosa in Iran. This study provides the first report on the occurrence of G. bolayi on L. serriola in Iran. Hitherto, Leveillula lactucae-serriolae has been reported on L. serriola in Iran. With this study, we provide a comprehensive illustration of G. bolayi on L. serriola and further discuss the phylogeny, host range, and ecology of this species.
