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Physiology and assimilate allocation in triplicate system,
host plant, arbuscular mycorrhiza (AM) and biotrophic
pathogen
POSTER or TALK: contribute session: Physiology/Monday
DUGASSA-GOBENA, DEREJE & F. SCHOENBECK
Institut für Pflanzenkrankheiten und Pflanzenschutz,
Universität Hannover, Herrenhäuser Strasse 2, D-30419
Hannover, Deutschland
ICOM1 Abstract
Plant health and growth are greatly influenced by
physiological state and assimilate allocation in plants which
may alterd also by AM and biotrophic pathogens, due to their
sink activities. Such interactions has been investigated in
Linum usitatissium, Glomus intraradices and Oidium lini. The
pathogen sink activity is expressed as sporulation rate and
it is higher on AM plants than on non-AM plants. In spite of
higher pathogen activity AM plants show less damage than non-
AM plants as expressed in CO2 assimilation in
mildewed plant parts and content of sucrose in non mildewed
shoot apex. These and other physiological parameters will be
discussed, with emphasis on mechanisms of improved plant
health by AM development.