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Molecular and cell biology of arbuscular mycorrhizal symbiosis

Journal

PLANTA
Volume 221, Issue 2, Pages 184-196

Publisher

SPRINGER
DOI: 10.1007/s00425-004-1436-x

Keywords

arbuscular mycorrhizal fungi; defence response; induced systemic resistance; morphology of arbuscule-containing cells; nutrient transfer; signal transduction

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The roots of most extant plants are able to become engaged in an interaction with a small group of fungi of the fungal order Glomales (Glomeromycota). This interaction-arbuscular mycorrhizal (AM) symbiosis-is the evolutionary precursor of most other mutualistic root-microbe associations. The molecular analysis of this interaction can elucidate basic principles regarding such associations. This review summarizes our present knowledge about cellular and molecular aspects of AM. Emphasis is placed on morphological changes in colonized cells, transfer of nutrients between both interacting partners, and plant defence responses. Similarities to and differences from other associations of plant and microorganisms are highlighted regarding defence reactions and signal perception.

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