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Laccase response of R. solani to various P. fluorescens strains in agar cultures. The boxed letters refer to metabolites known to be produced by certain strains of P. fluorescens. D, DAPG; T1, tensin (cyclic); T2, tensin (linear); X, uncharacterized (ethyl acetate extractable); V, viscosinamide. The strains of P. fluorescens not inducing measurable areas of laccase activity were DR12, DR20, DR46, DR56, PS12, and PS21.
