Molecular evidence identifies bloom-forming Phaeocystis (Prymnesiophyta) from coastal waters of southeast China as Phaeocystis globosa
Molecular evidence identifies bloom-forming Phaeocystis (Prymnesiophyta) from coastal waters of southeast China as Phaeocystis globosa
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DOI：
10.1016/s0305-1978(01)00054-0
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发表时间：
2002-01-01
影响因子：
1.6
通讯作者：
Qu, LH
中科院分区：
文献类型：
--
作者：
Chen, YQ;Wang, N;Qu, LH
利用18S小亚基核糖体RNA基因序列对引起我国东南沿海沃茨的一种棕囊藻进行了鉴定。这种棕囊藻的形态和生理特征与先前描述的球形棕囊藻Scherhouts或P.pouchetii（Hariot）Lagerheim不同。然而，棕囊藻18S rDNA的序列比较清楚地表明，它是非常相似的几个分离物的球形棕囊藻。因此，从我国东南沿海分离到的这一种，不属于P.cf.，而应属于P.globosa。pouchetii或其他物种。我们的研究结果还表明，表型的不同成员的属棕囊藻是可变的，显然是改变环境条件。因此，在系统发育分析的基础上，中国东南沿海的棕囊藻水华很可能起源于一个特有的暖水环境，而不是外来的。(C)2001爱思唯尔科技有限公司版权所有。
Sequence data from the 18S small subunit ribosomal RNA gene have been used to identify the species of a Phaeocystis (Prymnesiophyta) that caused harmful algae blooms in the coastal waters of southeast China. This Phaeocystis has morphological and physiological features that differ from those previously described for either P. globosa Scherffel or P. pouchetii (Hariot) Lagerheim. However, the sequence comparison of the Phaeocystis 18S rDNA clearly showed that it was remarkably similar to several isolates of P. globosa. Thus, the species isolated from the southeast coast of China is identified as P. globosa rather than P. cf. pouchetii or another species. Our results also demonstrate that phenotypes of different members of the genus Phaeocystis are variable, apparently changing in response to environmental conditions. It is concluded that, on the basis of this phylogenetic analysis, the bloom forming southeast China coast species of Phaeocystis most likely originated from an endemic warm-water, rather than a foreign source. (C) 2001 Elsevier Science Ltd. All rights reserved.