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Effect of Betula pendula clone and leaf age on Melampsoridium betulinum rust infection in a field trial
Author(s) -
Poteri,
Helander,
Saikkonen,
Elamo
Publication year - 2001
Publication title -
forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 1437-4781
DOI - 10.1046/j.1439-0329.2001.00235.x
Subject(s) - rust (programming language) , biology , inoculation , betula pendula , shoot , urediniospore , horticulture , botany , fungus , clone (java method) , dna , genetics , computer science , programming language
Ten 5‐year‐old Betula pendula clones were studied for their rust resistance in the field. The trees were treated by inoculating 10 leaves on a shoot with Melampsoridium betulinum urediniospore suspension or spraying the control leaves with water. The birch clones differed significantly in their resistance to M. betulinum leaf rust fungus and the clones also varied in their responses to the local rust strain and the inoculated rust strains. However, natural rust infections and inoculation treatment were positively correlated. The older leaves had fewer infections than the younger ones on the tip of the shoot in the control trees, but in the inoculation treatment no significant correlation was found between the leaf ages and rust infection. The factors behind the different leaf susceptibilities are discussed.