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Dumas-Gaudot E, Gollotte A, Cordier C, Gianinazzi S, Gianinazzi-Pearson V. 2000. Modulation of host defence systems, pp. 173-200. In: Arbuscular mycorrhizas: physiology and function. Eds: Y Kapulnick and DD Douds Jr. Kluwer Academic Press.
Arbuscular mycorrhizal (AM) fungi extensively invade host root tissues. This raises the question of how host plants contend with them; they must exert some kind of control over fungal proliferation since it is confined to a specific root tissue, the parenchymal cortex. Defence processes, which are triggered as a general plant response to microbial invasion, are modulated during root-fungus interactions in arbuscular mycorrhizas. This chapter presents and up-dated review of data on plant defence elicitation in these symbiotic systems and discusses possible mechanisms whereby defence reactions are maintained at a low level, as well as their implication in the phenomenon of bioprotection by AM fungi against soil-borne pathogens.
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