Abstract
Interactions between four dikaryotic strains of Lentinula edodes and seven strains of Pseudomonas species were investigated in vitro. Two strains of Pseudomonas tolaasii were strongly pathogenic to fruiting bodies of L. edodes, causing browning and lysis of the inoculated tissues. The mode and outcome of interactions on agar varied with the combination between strains of L. edodes and bacteria. Pseudomonas cepacia and two strains of Pseudomonas tolaasii inhibited hyphal growth of L. edodes strains, whereas Pseudomonas fluorescens and one strain of Pseudomonas tolaasii were generally susceptible to bacteriolysis by L. edodes. Strains of L. edodes differed markedly in their ability to attack and lyse bacteria. In general, hyphal tips were the most potent in bacteriolysis. Ultrastructural variations were recognized in the process of bacterial wall degradation by L. edodes hyphae, but walls were eventually disintegrated to minute granules that ranged in diameter from 0.05 μm to smaller than measurable by scanning electron microscopy.Key words: bacteriolysis, cell wall, Pseudomonas, Lentinula, SEM.
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