Characteristics of the pigments produced by sap-staining fungi

IRG/WP 97-10223

M Mori, M Takahashi

The present study was conducted to characterize the pigments produced by sap-staining fungi, Aureobasidium pullulans (de Bary) Arnaud and Ceratocystis piceae (M√ľnch) H. and P. Sydow. The pigments isolated from tested fungi were identified as melanins by spectroscopic methods (UV and infrared spectra). The UV and the infrared spectra of the fungal pigments were similar to those of the synthetic melanin. The spectra also indicated the similar structures of both fungal melanins. The adsorption bands at aliphatic CH in infrared spectra were stronger in fungal melanins than in synthetic melanin. From elemental analyses, H/C ratio of fungal melanins were higher than that of synthetic melanin. These results suggested that both fungal melanins had a high amount of aliphatic structures.


Keywords: PIGMENT; SAPSTAIN; AUREOBASIDIUM PULLULANS; CERATOCYSTIS PICEAE; MELANIN

Conference: 97-05-25/30 Whistler, British Columbia, Canada


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