Volume 16, Issue 4 (Winter 2025)
3 2025, 16(4): 13-20 |
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Teymurian P, Ghavam Mostafavi P, Hadioour M. The effect of thermal stress on changes of symbiotic microalgae in two coral species. 3 2025; 16 (4) :13-20
URL: http://jmb.ahvaz.iau.ir/article-1-989-en.html
URL: http://jmb.ahvaz.iau.ir/article-1-989-en.html
Department of Fisheries and Marine Science, Faculty of natural Resources and Environment, Science and Research Branch, Islamic Azad University, Tehran/Iran
Abstract: (28 Views)
Hermatypic corals harbor communities of single-celled symbiotic algae from the Symbiodiniaceae family. So far, 7 genera of this algae have been identified by molecular methods. These single-celled symbiotic algae have different physiological characteristics and this matter plays an important role in the survival of the host. In this research, two coral species, Dipsastrea pallida and Psammocora contigua, were sampled from the depth of 3 meters in Larak Island in 2014. After adaptation of the samples in the treatment aquarium for two weeks (20 samples in 4 treatments including control, 30, 32 and 34oC), bleaching was observed in the corals. Sampling of corals carried out before and after bleaching. After isolating the symbiotic algae via air pump, DNA was extracted by Cethyl Trimethyl Ammonium Bromide (CTAB) - Chloroform method. PCR amplification was performed using the target gene ITS2 (Internal Transcribed Spacer2). The results of gene sequencing and phylogenic tree indicated that the studied coral species did not change their symbiotic communities with the decreasing of temperature. Because of the presence of these species in the Persian Gulf, they can tolerate the temperature of 30 oC and decreasing the temperature to 32 and 34oC has just caused partial bleaching, it may be due to the presence existence of thermal tolerant type of symbiotic algae in the studied coral species.
Type of Study: Research |
Subject:
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Received: 2023/07/29 | Accepted: 2025/01/24 | Published: 2025/01/24
Received: 2023/07/29 | Accepted: 2025/01/24 | Published: 2025/01/24
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