Noori Koupaei Atoosa, Dehghani Hamed, Mostafavi Pargol Ghavam, Mashini Amirhossein Gheitanchi
Department of Marine Biology, Science and Research Branch, Islamic Azad University, Hesarak, Tehran 1477893855, Iran.
Mar Pollut Bull. 2016 Apr 30;105(2):553-7. doi: 10.1016/j.marpolbul.2016.02.058. Epub 2016 Mar 2.
Zoantharians of the Persian Gulf (PG) experience periods of anomalous high temperature, irradiance and desiccation. Their survival largely relies on the symbiotic relationship with single celled dinoflagellates of the genus Symbiodinium. However, the phylogeny of symbionts of zoantharians has not been investigated in the region. In this study, the second internal transcribed spacer region of ribosomal DNA (ITS2) was used to recognize in hospite populations of Symbiodinium in Palythoa aff. mutuki, Palythoa tuberculosa and Zoanthus sansibaricus colonies from Hengam, Kish, Larak, and Qeshm Islands, in the PG. The results showed subclade D1-4 and a variant of A1, were the most prevalent subclades of Symbiodinium. Predominance of stress tolerant subclade D1-4 and putatively radiation tolerant variant of A1 of Symbiodinium in zoantharian species might suggest an adaptation strategy to the extreme physical environment of the PG.
波斯湾的群栖海葵会经历异常高温、高辐照度和干燥期。它们的生存很大程度上依赖于与共生藻属单细胞双鞭毛虫的共生关系。然而，该地区群栖海葵共生体的系统发育尚未得到研究。在本研究中，核糖体DNA的第二个内部转录间隔区（ITS2）被用于识别来自波斯湾亨加姆岛、基什岛、拉腊克岛和格什姆岛的近似穆图基群栖海葵、瘤状群栖海葵和桑给巴尔群栖海葵群体中的共生藻。结果显示，D1-4亚分支和A1变体是共生藻最普遍的亚分支。群栖海葵物种中耐胁迫的D1-4亚分支和假定耐辐射的A1变体占主导地位，这可能暗示了一种适应波斯湾极端物理环境的策略。
