van Eijk G W, Roeymans H J
Antonie Van Leeuwenhoek. 1982;48(3):257-64. doi: 10.1007/BF00400385.
Species of the genera Taphrina Fr. and Protomyces Unger were screened for the presence of carotenoid pigments and the sterols ergosterol and brassicasterol. All strains produced carotenoids in variable amounts: Taphrina: 0.3--39 micrograms/g dry weight; protomyces: 65--99 micrograms/g dry weight. It was concluded that the two genera cannot be separated on the basis of presence or absence of carotenoids. Thirty strains (24 species) of Taphrina produced brassicasterol as the principal sterol; twenty-one strains (17 species) did not form ergosterol. Only four isolates (4 species) produced ergosterol without formation of brassicasterol. Brassicasterol was the major sterol in 3 species of Protomyces, whereas ergosterol was absent. Brassicasterol is a rather unique sterol within the fungal kingdom and has hitherto not been found in the red yeasts. Therefore, this sterol is of taxonomic significance in contrast with ergosterol, which is widespread among fungi.
对外囊菌属（Taphrina Fr.）和原霉菌属（Protomyces Unger）的菌种进行了筛选，以检测类胡萝卜素色素以及麦角甾醇和油菜甾醇的存在情况。所有菌株均产生不同含量的类胡萝卜素：外囊菌属：0.3 - 39微克/克干重；原霉菌属：65 - 99微克/克干重。得出的结论是，不能根据类胡萝卜素的有无来区分这两个属。30个外囊菌属菌株（24个种）以油菜甾醇作为主要甾醇；21个菌株（17个种）不形成麦角甾醇。只有4个分离株（4个种）产生麦角甾醇而不形成油菜甾醇。油菜甾醇是3种原霉菌属菌种中的主要甾醇，而不存在麦角甾醇。油菜甾醇在真菌界是一种相当独特的甾醇，迄今在红酵母中尚未发现。因此，与在真菌中广泛存在的麦角甾醇相比，这种甾醇具有分类学意义。
