南极德雷克海峡表层海水酵母菌多样性研究

为了研究德雷克海峡的微生物多样性,采集南极德雷克海峡表层海水,通过传统分离培养法获得可培养的酵母菌株,对其18S r DNA保守序列进行测序及系统发生分析。结果表明:共分离出45株酵母菌,属于9个属,12个种;其中,优势属为Meyerozyma属,优势种为Meyerozyma guilliermondii。对所有菌株的过氧化氢酶活性进行检测,发现23株酵母菌具有强烈的过氧化氢酶活性,13株具有弱过氧化氢酶活性,即可分解过氧化氢的菌株占总菌株数的80%。

Phylogenetic Diversity of Culturable Yeast from Surface Seawater of the Drake Passage in Antarctic

In order to study microbial diversity in the surface seawater of the Drake Passage in Antarctic,7 surface seawater samples were collected to isolate the strains of culturable yeast by the traditional method,and 18S rDNA sequencing and phylogenetic analyses were carried out.The results showed that 45 yeast strains were isolated and there were 9 genera and 12 species.Meyerozyma sp.and Meyerozyma guilliermondii was the dominant genera and species.The results of the catalase activities showed that 23 strains were strong catalase positive,13 strains were weak,and 80％ strains were catalase positive.