plant surface microbiology.pdf

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Robert Bauer and Franz Oberwinkler
Fig. 4. Local interaction zone between Entyloma hieracii (upper cell) and its host (lower
cell) showing the exocytosis profile of a simple interaction apparatus (arrow). Note the
electron-opaque deposit at the host side (arrowhead). Host response to infection is visible
at R. Scale bar 0.5 mm
then results in the formation of a complex cisternal net. This type of cellular
interaction characterizes the Doassansiales and Exobasidiales (Bauer et al.
1997).
1. Local interaction zones with complex interaction apparatus containing
cytoplasmic compartments (Fig. 5)
The intercisternal space of the cisternal net finally becomes integrated in
the interaction apparatus. Depending upon the species, interaction zones
of this type are formed by intercellular hyphae or haustoria. This type of
cellular interaction characterizes the Doassansiales (Bauer et al. 1997).
2. Local interaction zones with complex interaction apparatus producing
interaction rings (Fig. 6)