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CUTICLE THICKNESS IN PHLOX AND RESISTANCE TO POWDERY MILDEW: AN UNRELIABLE LINE OF DEFENSE
Author(s) -
Jarosz Andrew M.,
Sheets Michael,
Levy Morris
Publication year - 1982
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1982.tb13325.x
Subject(s) - powdery mildew , biology , cuticle (hair) , mildew , botany , resistance (ecology) , host (biology) , erysiphe graminis , taxon , agronomy , ecology , poaceae , anatomy , hordeum vulgare
The relationship between leaf cuticle thickness and resistance to the powdery mildew Erysiphe cichoracearum was investigated for nine feral Phlox taxa. Cuticle thickness, the first potential host resistance feature, is variable within plants, although not correlated with leaf age, and both within and among taxa. There is also considerable variation within and among taxa in resistance response to artificial inoculations with a broadly compatible E. cichoracearum strain. However, no significant correlations between cuticle thickness and resistance were observed. The implications of these results for anti‐mildew defenses in both feral and cultivated hosts are discussed.