The infection of vascular tissue of Crataegus monogyna by the monokaryotic stage of Gymnosporangium clavariiforme

Abstract EN

The fine structure of Crataegus monogy na infected with the monokaryotic structures of Gymnosporangium clavariiforme was investigated.

The distribution of fungal thallus within host tissue, types of infection structures and interactions with host cells have been described with particular reference to vascular system infection.

A large nucleus and the formation of a septum at the level of the penetration site is frequently observed.

This stage of infection is characterized by the extensive growth of fungal structures in the intercellular spaces of leaves mesophyll, with low frequency of penetration of these cells, and the greater degree of invasion of all types of cells in the host plant vascular system.