卵孢金孢藻(Chrysosporum ovalisporum)——中国水华蓝藻新记录

First report of bloom forming cyanobacterial species Chrysosporum ovalisporum in China

卵孢金孢藻(Chrysosporum ovalisporum(Forti)Zapomelováet al.)是一种在欧洲地中海地区和澳大利亚较常见的水华蓝藻,但我国目前还未有该物种分布的报道。本文对采自上海市滴水湖中的藻种进行分离培养,获得了一株纯化藻株CFWA01007,经光学显微镜观察,初步判定其为卵孢金孢藻,对其形态特征进行了详细描述并测定了其16S rRNA基因序列,结果与来自欧洲和北美的Chrysosporum ovalisporum(Forti)Zapomelováet al.相似度极高,故判断其即为卵孢金孢藻,这是该种在中国的首次发现。对该种的分类学和生态学特征进行了讨论。

Chrysosporum ovalisporum（ Forti） Zapomelová et al. is a common bloom forming species in Australia and the Mediterranean region of Europe. Until now,however,there have been no reports of C. ovalisporum（ Forti） Zapomelová et al. in China. Here,one cultured C.ovalisporum strain（ CFWA01007） was isolated from field samples collected from Lake Dishui in Shanghai City. A detailed morphological description of C. ovalisporum（ Forti） Zapomelováet al. was determined using light microscopy. Phylogenetic analysis based on 16 S rRNA confirmed this Chinese strain to be tightly grouped with strains from Europe and North America. Furthermore,the morphological features of this geographical strain were compared with other strains and its ecological features were summarized.