首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Comparison of Symbiodinium populations in corals from subtidal region and tidal pools of northern coasts of Hengam Island, Iran
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Comparison of Symbiodinium populations in corals from subtidal region and tidal pools of northern coasts of Hengam Island, Iran

机译:伊朗亨加姆岛北部海岸潮下带和潮池珊瑚共生菌种群的比较

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摘要

Coral reefs are integral part of tropical ecosystems and obligatory symbiosis with the genus Symbiodinium has a vital role in resistance and survival of the holobiont Nine different genetic clades (A to I) have been discovered by molecular techniques. Members of Symbiodinium are ecologically and biogeographically diverse and their distribution patterns are determined by temperature, irradiance, depth, season and latitude however stress-tolerant species might be detected within each clade. Samples of four coral species from subtidal region in the north of Hengam Island, Persian Gulf (PG) and its tidal pools were analyzed by internal transcribed spacer of ribosomal DNA and by the aid of Denaturing Gradient Gel Electrophoresis (DGGE) to compare the differences in populations of their symbionts. The results showed that some subtidal colonies of one species harbored less tolerant subtypes of Symbiodinium subclade C7. Nonetheless, clade D Symbiodinium was the most dominant symbiotic clade in both tidal pool and subtidal coral colonies. A novel subtype of subclade D1 Symbiodinium was also detected in some coral colonies and was inferred as subclade D1.PG Symbiodinium. The prevalence of clade D Symbiodinium might reflect corals response to extreme environmental stresses of tidal pools and the northern PG itself that coral inhabitants have to cope with. (C) 2015 Elsevier B.V. All rights reserved.
机译:珊瑚礁是热带生态系统必不可少的组成部分,与共生菌属的强制性共生在全生命周期的抵抗和生存中起着至关重要的作用。通过分子技术已经发现了9种不同的遗传进化枝(A至I)。 Symbiodinium的成员在生态和生物地理上都各不相同,其分布方式取决于温度,辐照度,深度,季节和纬度,但是在每个进化枝中都可能检测到耐胁迫的物种。通过核糖体DNA的内部转录间隔物并借助变性梯度凝胶电泳(DGGE)分析了波斯湾Hengam岛北部(PG)潮下带的四种珊瑚物种及其潮汐池的样品,以比较差异。共生体的数量。结果表明,一种物种的一些潮下殖民地的共生菌亚群C7的亚型耐受性较低。尽管如此,进化枝D Symbiodinium是潮池和潮下珊瑚群落中最主要的共生进化枝。在某些珊瑚群落中也发现了D1共生共生亚型的新亚型,并推断为D1.PG共生共生亚型。进化枝D共生体的流行可能反映了珊瑚对潮汐池和珊瑚栖息者必须应对的北部PG本身的极端环境压力的反应。 (C)2015 Elsevier B.V.保留所有权利。

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