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OBSERVATIONS ON RESISTANCE TO POWDERY MILDEWS
Author(s) -
CORNER E. J. H.
Publication year - 1935
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1935.tb06840.x
Subject(s) - botrytis cinerea , parasitism , botrytis , biology , resistance (ecology) , botany , host (biology) , ecology
s little seemed to be known of the way in which certain varieties V of a host species resist the attack of mildew, I experimented with Ervsiphc graminis, Sphaerothcca pannosa and Podosphaera Icitcotricha, determining first the course of infection on susceptible varieties, then on the resistant and finally on a miscellany of inappropriate hosts. The results show that, under suitable conditions and provided that the cuticle is not too thick, mildew conidia will germinate on any plant up to the stage of penetration of the cellulose layer of the host cell and of formation of an infection papilla, but that except on susceptible varieties the penetration process is then killed before it can enter the cytoplasm or after it has formed a rudimentary haustorium. I examined with particular care the exact method of penetration of the host cell, and certain points of interest in the germination of the conidia have come to light. Zimmermann(30) in 1924 summarised all earlier work on the powdery mildews.