Light and electron microscopical studies of interactions between Allium spp. and Peronospora destructor

A. Kofoet, V. Zinkernagel

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Abstract

The interactions between Peronospora destructor and its Allium hosts were studied to compare reactions in resistant and susceptible hosts. The parenchymatous cells of A. roylei and of the amphidiploid A. fistulosum × roylei react hypersensitively. In the tissue of A. tuberosum the hyphae and haustoria of P. destructor die back without degrading the host cells. Leaves were macerated enzymatically and the single cells formed were infected with P. destructor. Haustoria developed in cells of the compatible host A. cepa. The resistance of the other hosts is not always expressed in vitro, and comparisons were made with in vivo responses.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalMycological Research
Volume95
Issue number3
DOIs
StatePublished - 1991

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