The Hemibiotrophic Apple Scab Fungus <i>Venturia inaequalis</i> Induces a Biotrophic Interface but Lacks a Necrotrophic Stage.

ABSTRACT: Microscopic evidence demonstrated a strictly biotrophic lifestyle of the scab fungus Venturia inaequalis on growing apple leaves and characterised its hemibiotrophy as the combination of biotrophy and saprotrophy not described before. The pathogen-host interface was characterised by the formation of knob-like structures of the fungal stroma appressed to epidermal cells as early as 1 day after host penetration, very thin fan-shaped cells covering large parts of the host cell lumen, and enzymatic cuticle penetration from the subcuticular space limited to the protruding conidiophores. The V. inaequalis cell wall had numerous orifices, facilitating intimate contact with the host tissue. Pathogen-induced modifications of host cells included partial degradation of the cell wall, tr

SUBMITTER: Steiner U 

PROVIDER: S-EPMC11676478 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature