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Morphology, genetics and toxin profile of Prorocentrum texanum (Dinophyceae) from Argentinian marine coastal waters
Phycologia ( IF 1.6 ) Pub Date : 2020-11-01 , DOI: 10.1080/00318884.2020.1830552
Inés Sunesen 1 , Francisco Rodríguez Hernández 2 , Delfina Aguiar Juárez 1 , Jonás Adrián Tardivo Kubis 1 , Andrea Susana Lavigne 1 , Araceli Rossignoli 2, 3 , Pilar Riobó 4 , Eugenia A. Sar 1
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ABSTRACT Two strains of Prorocentrum texanum (LPCc020 and LPCc032) were established from coastal waters of the Province of Buenos Aires, Argentina. Field and cultured materials were examined using light and scanning electron microscopy, and the planktonic species Prorocentrum texanum, a known okadaic acid producer, was identified. We compared morphology, genetics and toxin profile of P. texanum based on material from Argentina in relation to strains from the Gulf of México. Our specimens and those described in the protologue of P. texanum var. texanum had similar shape, thecal ornamentation distribution patterns of large and small pores, and morphology of wings supported by platelets 1 and 4, respectively. Morphometric differences occurred in the ranges of length, depth and diameter of thecal plate pores. Morphology of the periflagellar area was described from Argentinean strains. SSU, ITS and LSU rDNA-based phylogenies of strains LPCc020 and LPCc032 placed them with other sequences of P. texanum. ITS rDNA showed that the most closely species, in order, are P. micans, P. steidingerae, P. mexicanum/P. rhathymum, and P. koreanum. The ability of the Argentinian strains to produce marine biotoxins was assessed, but, no toxins were detected. This is the first report of P. texanum outside the Gulf of México.

中文翻译:

来自阿根廷沿海水域的 Prorocentrum texanum (Dinophyceae) 的形态学、遗传学和毒素谱

摘要 在阿根廷布宜诺斯艾利斯省的沿海水域建立了两个 Prorocentrum texanum 菌株(LPCc020 和 LPCc032)。使用光学和扫描电子显微镜检查现场和培养材料,并确定了浮游物种 Prorocentrum texanum,一种已知的冈田酸生产者。我们比较了基于来自阿根廷的材料与来自墨西哥湾的菌株的 P. texanum 的形态学、遗传学和毒素谱。我们的标本和 P. texanum var. protologue 中描述的标本。texanum 具有相似的形状、大孔和小孔的膜纹分布模式以及分别由血小板 1 和 4 支撑的翅膀的形态。膜板孔的长度、深度和直径范围存在形态学差异。阿根廷菌株描述了鞭毛周区域的形态。基于 SSU、ITS 和 LSU rDNA 的 LPCc020 和 LPCc032 菌株的系统发育将它们与 P. texanum 的其他序列放置在一起。ITS rDNA 显示最接近的物种依次是 P. micans、P. steidingerae、P. mexicanum/P. rhathymum 和 P. koreanum。评估了阿根廷菌株产生海洋生物毒素的能力,但没有检测到毒素。这是墨西哥湾以外 P. texanum 的第一份报告。评估了阿根廷菌株产生海洋生物毒素的能力,但没有检测到毒素。这是墨西哥湾以外 P. texanum 的第一份报告。评估了阿根廷菌株产生海洋生物毒素的能力,但没有检测到毒素。这是墨西哥湾以外 P. texanum 的第一份报告。
更新日期:2020-11-01
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