ALCOHOLIC GLUCOSE AND XYLOSE FERMENTATIONS BY THE COCULTURE PROCESS - COMPATIBILITY AND TYPING OF ASSOCIATED STRAINS

被引:22
作者
LAPLACE, JM [1 ]
DELGENES, JP [1 ]
MOLETTA, R [1 ]
NAVARRO, JM [1 ]
机构
[1] UNIV MONTPELLIER 2,CTR GENIE TECHNOL ALIMENTAIRE MICROBIOL & PROC BIOL,F-34095 MONTPELLIER,FRANCE
关键词
KILLER CHARACTER; ERYTHROMYCIN RESISTANCE; DIURON RESISTANCE; PICHIA-STIPITIS;
D O I
10.1139/m92-106
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
As part of the simultaneous fermentation of both glucose and xylose to ethanol by a coculture process, compatibilities between xylose-fermenting yeasts and glucose-fermenting species were investigated. Among the Saccharomyces species tested, none inhibited growth of the xylose-fermenting yeasts. By contrast, many xylose-fermenting yeasts, among the 11 tested, exerted an inhibitory effect on growth of the selected Saccharomyces species. Killer character was demonstrated in three strains of Pichia stipitis. Such strains, despite their high fermentative performances, cannot be used to ferment D-xylose in association with the selected Saccharomyces species. From compatibility tests between xylose-fermenting yeasts and Saccharomyces species, pairs of microorganisms suitable for simultaneous xylose and glucose fermentations by coculture are proposed. Strains associated in the coculture process are distinguished by their resistance to mitochondrial inhibitors. The xylose-fermenting yeasts are able to grow on media containing erythromycin (1 g/L) or diuron (50 mg/L), whereas the Saccharomyces species are inhibited by these mitochondrial inhibitors.
引用
收藏
页码:654 / 658
页数:5
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