Phenotypic, its phylogenetic and pathogenic analyses of Pyllosticta multicorniculata associated with needle blight symptoms of balsam fir in Canada
2006
Vujanovic, V.(University of Saskatchewan, Saskatoon, SK (Canada). College of Agriculture and Bioresources, Department of Applied Microbiology and Food Science)
Phyllosticta multicorniculata causes needle blight on Abies balsamea in eastern Canada. The disease symptoms are similar to those provoked by Phyllosticta abietis on Abies grandis in the USA. Preliminary study, based on rDNA ITS sequence data analysis, revealed that P. multicorniculata formed distinct but closely-related clade with other sister mitosporic Phyllosticta and teleomorphic Guignardia and Botryosphaeria taxa. However, the phylogenetic position of the fungus is still doubtful which demand further and more advanced molecular investigation. This is the first report of a microconidial stage in P. multicorniculata and, for the first time, description of the developing mucilaginous appendages in macroconidia. This study contributes in disease diagnostics and gives new information on distribution of the disease in Canada.
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