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J Microbiol Biotechnol. 2007 Jul;17(7):1198-203.

Involvement of extracellular matrix and integrin-like proteins on conidial adhesion and appressorium differentiation in Magnaporthe oryzae.

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1
Department of Agricultural Biotechnology, Center for Fungal Genetic Resources, Seoul National University, Seoul 151-921, Korea.

Abstract

Conidial adhesion and appressorium formation of Magnaporthe oryzae on the rice surface are important early events in the infection process. As an initiative step to understand the mechanisms underlying these cellular processes at a biochemical level, the effect of a human fibronectin antibody (HFA) and RGD peptides on conidial adhesion and appressorium formation was evaluated. HFA inhibited conidial adhesion and appressorium formation in a dosage-dependent manner. RGD peptides also inhibited these cellular events. Conidial adhesion and appressorium formation inhibited by RGD peptides were restored by chemicals involved in the cyclic AMP-dependent signaling pathway. These results suggest that extracellular matrix proteins might be involved in conidial adhesion and appressorium formation through integrin-like receptor mediation and modulation of cAMP-dependent signaling in the cells.

PMID:
18051333
[Indexed for MEDLINE]
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