汉逊酵母属的两个新种

从中国宣威火腿中分离到两株典型的火腿酵母.它们是火腿微生物菌群的最优势种,可独立、成功地完成火腿发酵全过程,从而避免霉菌及其毒素对火腿的污染.经鉴定,这两株菌均为汉逊酵母属(Hansenula H.et P.Sydow)中的新种,分别命名为宣威汉逊酵母(Hansenula xuanweiensis Jiang sp.nov.)和中国汉逊酵母(Hansenula sinensis Jiang sp.nov.).

TWO NEW SPECIES OF HANSENULA FROM CHINA HAM

The investigators isolated two typical yeasts from China Xuanwei ham, by which the complex fermentative process of ham may be accomplished fully and satisfactorily. Both of the vegetative cells are spheroidal or ellipsoidal and asexual reproduction is by multilateral budding on malt extract agar. The strain S86121 forms asci and one to four hat-shaped ascospores in each ascus on sporulated medium. The strain S86107 produce asci which contain one to three (often 1-2) hat-shaped ascospores in each ascus. The two strains,fermentating glucose and assimilating nitrate, are identified into the genus of Hansenula H. et P. Sydow according to the direction of Kreger's yeasts monograph (1984). Further, having been compared the distinctions between ham yeasts and their related species Hansenula holstii of the genus,the strain S86121 differs markedly from the strain S86107 and H. holstii in the fermentation of lactose, raffinose. The distinctions between the strain S86107 and H. holstii are the assimilation of lactose, raffinose, erythrole, melibiose. The strains S86107 and S86121 differ from all of the known species of the genus by their phsiological, biochemical and ecological characteristics. Therefore, the strains S86107 and S86121 are claimed being two new species. The strains S86121 and S86107 are respectively named as Hansenula xuanweiensis Jiang sp. nov. and Hansenula sinensis Jiang sp. nov.