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  • Evidence for 1,8-dihydroxynaphthalene melanin in three halophilic black yeasts grown under saline and non-saline conditions
    Kogej, Tina ...
    The ascomycetous black yeasts Hortaea werne`kii, Phaeotheca triangularis, aud Trimmatostroma salinum are halophilic fungi that inhabit hypersaline water of solar salterns. They are characterized by ... slow, meristematic growth and very thick, darkly pigmented cell walls. The dark pigment, generally thought to be melanin, is consistently present in their cell walls when they grow under saline and nonsaline conditions. We used the inhibitor tricyclazole to test the fungi in this study for the presence of 1,8-dihydroxynaphthalene (DHN)melanin biosynthesis, since fungal melanins reportedly are derived eitherfrom DHN, tyrosine via 3,4-dihydroxyphenylalauine, gamma-glutaminyl-3,4-dihydroxybenzene, or catechol. Tricyclazole-treated cultures of the fungi were reddish-brown in color and contained typical intermediates of the DHN-melanin pathway, as demonstrated by high-performance liquid chromatography. This investigation showed that the three fungi synthesized DHN-melanin under saline and non-saline growth conditions.
    Vir: FEMS microbiology letters. - ISSN 0378-1097 (Letn. 232, 2004, str. 203-209)
    Vrsta gradiva - članek, sestavni del
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 17566681