Phyiophthora cínnamomi is soilborn pseudofungus, associated to the Oomycetes with ink disease of chestnut. Lipases (triacylglycerols hydrolases) are important enzymes in fat metabolism, catalyzing the breakdown of triacylglycerols to free fatty acids and g!ycerol. Owing to the very low so!ubility of their natural substrates, this hydrolysis is catalyzed at the interface between an insoluble substrate and the aqueous phase in which the enzyme is solubilized.