我国淡水水华蓝藻-束丝藻属新记录种
THE TWO NEWLY RECORDED SPECIES OF BLOOM-FORMING CYANOBACTERIAL GENUS APHANIZOMENON MORR. EX BORN. ET FLAH. (CYANOPHYTA) FROM CHINA
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摘要: 由于束丝藻属(Aphanizomenon Morr.ex Born.et Flah.)的藻丝、营养细胞、藻丝末端细胞(Terminal cells)、异型胞(Heterocysts)、厚壁休眠孢子(Akinetes)的形态和大小等特征易变,对鉴定工作造成许多困难,所以该属的分类一直以来是藻类学者面临的长期难题。基于当今束丝藻属的分类研究,对我国淡水水体束丝藻属进行了研究,比较了该属的藻丝、营养细胞、异形胞、厚壁孢子及末端细胞的特征,发现了我国淡水水体的2个新记录种:柔细束丝藻(Aphanizomenon gracileLemmermann)和依沙束丝藻(A.issatschenkoi(Usaev)Prokina-Lavrenko),并对其形态特征进行了详细描述。Abstract: Taxonomy of Aphanizomenon has been problematic for a long time due to the fact that the morphylogical characters of the filaments,vegetable cells,terminal cells,heterocysts,and akinetes in the genus are found to be variable.Based on the existing taxonomic system,Aphanizomenon strains collected in China were examined for their morphylogical charecters including filaments,vegetable cells,terminal cells,heterocysts,and akinetes.The results showed that two newly recorded species of Aphanizomen were found from Chinese freshwater bodies.Therefore,these two species including A.gracile Lemmermann and A.issatschenkoi(Usaev)Prokina-Lavrenko,were reported and described in this study for details.
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