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Pigment production by strain IPEC 26449 in the presence of l-tyrosine. (A) Heat-killed Sporothrix cells are unable to produce pigment after 20 days of incubation, whereas viable fungal cells develop black pigmentation. (B) Glyphosate (100 mg/liter) was unable to completely inhibit melanin production, whereas sulcotrione (16 mg/liter) abolished pigment formation after 12 days of incubation. (C) Sporothrix cell mass harvested after 20 days of incubation with or without l-tyrosine.
