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Fungal Genet Biol. 1999 Jul-Aug;27(2-3):161-74.

Cell wall proteins of the ectomycorrhizal basidiomycete Pisolithus tinctorius: identification, function, and expression in symbiosis.

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Institut National de la Recherche Agronomique, Centre de Recherches de Nancy, Champenoux, 54280, France.


Specific cell-cell and cell-substrate interactions direct the growth of ectomycorrhizal fungi to their host root targets. These elaborate mechanisms lead to the differentiation of distinct multihyphal structures, the mantle, and the Hartig net. In the ectomycorrhizal basidiomycete Pisolithus tinctorius, the use of two-dimensional gel electrophoresis, immunocytochemical microscopy, and RNA blot analysis has demonstrated the differential expression of cell wall proteins (CWPs), such as hydrophobins, adhesins, and mannoproteins, during symbiotic interaction. In other fungi, these CWPs have been suggested to play a role in hyphae aggregation, intracellular signaling cascades, and cytoskeletal changes. The recent cloning of the genes for several of these CWPs in P. tinctorius allows us to address their function in symbiosis. This review summarizes our knowledge of CWPs in P. tinctorius and considers parallels with other biotrophic fungi as a possible framework for future work.

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