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Localization of Polyphenoloxidases During the Establishment of Ophrys lutea Endomycorrhizas
M. Salome S. Pais and J. Barroso
The New Phytologist
Vol. 95, No. 2 (Oct., 1983), pp. 219-222
Stable URL: http://www.jstor.org/stable/2432693
Page Count: 8
You can always find the topics here!Topics: Endosymbionts, Reaction products, Cytoplasm, Plant cells, Hyphae, Enzymes, Cytosol, Infections, Rhizoctonia, Fungi
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The cytochemical location of polyphenoloxidases in Ophrys lutea during invasion by Rhizoctonia repens suggests that the fungus is able to synthesize or activate polyphenoloxidases. The dense product of its reaction is observable in the fungal cytoplasm during the first stages of fungal invasion. Later on, it is located in small quantities in the hyphal cytoplasm and great amounts are seen at the interface. Our results suggest that the enzymes, synthesized in the fungal cytoplasm, are translocated across the plasmalemma and the cell wall of the fungus. These enzymes are accumulated in the interface close to the host plasmalemma, where they are likely to promote the oxidation of phenols from the host.
The New Phytologist © 1983 New Phytologist Trust