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首页> 外文期刊>Harmful Algae >Morphology, toxin composition and molecular analysis of Dinophysis ovum Schuett, a dinoflagellate of the 'Dinophysis acuminata complex'
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Morphology, toxin composition and molecular analysis of Dinophysis ovum Schuett, a dinoflagellate of the 'Dinophysis acuminata complex'

机译：``Dinophysis acuminata complex''的鞭毛藻Dinophysis ovum Schuett的形态，毒素组成和分子分析

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摘要

This work provides a morphological, toxinological and molecular description of Dinophysis ovum Schutt, a species included in the Dinophysis acuminata complex, and often misidentified as D. acuminata Claparede and Lachmann. A dinoflagellate bloom occurred in the Galician Rias Baixas (NW Spain) in June 2006, where D. ovum was the overwhelmingly dominant (97%) Dinophysis species, accompanied by small numbers of D. acuminata, and other Dinophysis spp., Protoperidinium spp. and Ceratium spp. D. ovum was discriminated from D. acuminata at the light microscope on the basis of their different cell contours; it had only okadaic acid (OA) (7.1 pg ceir~(-1)) as a detectable lipophilic toxin component. Molecular analyses of the ITS1 -5.8S-ITS2 rDNA region showed that D. ovum was grouped in a common clade of small-sized species of Dinophysis, close to D. sacculus. Analyses of mitochondrial genes (Cytochrome c oxydase 1) of D. ovum and D. acuminata showed this region exhibited a much higher variability -25 bp difference between the 2 species under study and was therefore more appropriate than rDNA genes for phylogenetic analyses of Dinophysis spp. This is the first report of lipophilic shellfish toxins in D. ovum, and of analyses of mitochondrial genes to discriminate between different species of Dinophysis.
机译：这项工作提供了Dinophysis ovum Schutt（一种在Dinophysis acuminata复合物中包含的物种，通常被误认为D. acuminata Claparede和Lachmann）的形态，毒素学和分子描述。 2006年6月，加利西亚里亚斯·拜萨斯（西班牙西北部）发生了鞭毛藻的绽放，其中卵子D.ovum是占主导地位（占97％）的Dinophysis物种，伴随着少量的D.acuminata和其他Dinophysis spp。，Protoperidinium spp。和Ceratium spp。在光学显微镜下，根据卵圆线虫的细胞轮廓，将其与D. acuminata区分开。它只有冈田酸（OA）（7.1 pg ceir〜（-1））作为可检测的亲脂性毒素成分。对ITS1-5.8S-ITS2 rDNA区域的分子分析表明，卵圆线虫被分组在一个小型的Dinophysis小物种的共同进化枝中，靠近囊球藻。对卵圆线虫和尖锐线虫的线粒体基因（细胞色素c氧化酶1）的分析表明，该区域在所研究的两个物种之间表现出更高的-25 bp差异，因此比rDNA基因更适合于Dinophysis spp的系统发育分析。 。这是卵形衣原体中亲脂性贝类毒素的首次报道，也是线粒体基因分析以区分不同种类的恐龙的报道。

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