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Please use this identifier to cite or link to this item: http://hdl.handle.net/1993/2775

Title: First report of Mycosphaerella graminicola, the sexual state of Septoria tritici, in Manitoba, Canada
Authors: Hoorne, C
Lamari, L
Gilbert, J
Ballance, GM
Keywords: teleomorph
ascospores
wheat
speckled leaf blotch
Septoria tritici
FRAGMENT-LENGTH-POLYMORPHISMS
WHEAT
TELEOMORPH
FREQUENCY
INOCULUM
UK
Issue Date: 31-Dec-2002
Citation: 0706-0661; CAN J PLANT PATHOL, DEC 2002, vol. 24, no. 4, p.445 to 449.
Abstract: Mycosphaerella graminicola, the sexual state of Septoria tritici that causes speckled leaf blotch in wheat, was found in wheat stubble during the summer of 2001 in southwestern Manitoba. This is the first time that the teleomorph of the pathogen has been identified by direct observation in Canada. Ascospores isolated from pseudothecia formed similar conidial colonies on agar media as the pycnidiospores of Septoria tritici, the asexual state. Wheat plants inoculated with conidia derived from ascospore isolates developed symptoms typical of speckled leaf blotch. Single cirrhi were picked from the necrotic lesions to reisolate the pathogen. Budding conidial colonies identical to those produced by the germination of the ascospores were obtained. These aforementioned steps prove that the pseudothecia found in the wheat stubble were those of M. graminicola. Therefore, it can be assumed that M. graminicola ascospores contribute to the primary inoculum of speckled leaf blotch in Manitoba. The presence of the sexual state in Canada has been anticipated and is consistent with reports from other regions of the world.
URI: http://hdl.handle.net/1993/2775
DOI: http://dx.doi.org/10.1080/07060660209507032
Appears in Collection(s):Research Publications (UofM Student, Faculty and Staff only access)

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