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SHI Yan, YU Zhigang, ZHEN Yu, WANG Guoshan, WANG Xungong, MI Tiezhu. Effect of decreasing temperature on the strobilation of Aurelia sp.1[J]. HaiyangYuHuZhao, 2018, 36(2): 465-472

Effect of decreasing temperature on the strobilation of Aurelia sp.1

SHI Yan1,2,3, YU Zhigang3,4, ZHEN Yu1,2,3, WANG Guoshan1,2,3, WANG Xungong1,2,3, MI Tiezhu1,2,3
1 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;
2 Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China;
3 Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;
4 Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Qingdao 266100, China
The worldwide proliferation of marine jellyfish has become a crucial ecological and social issue, and as a cosmopolitan species, Aurelia spp. have received increasing scientific attentions. In the present study, the responses of strobilation in Aurelia sp.1 to decreasing temperature were illuminated through the expression levels of the retinoid x receptor (RxR) gene and the gene encoding a secreted protein, CL390. We observed that a higher final temperature decreased the strobilation prophase and strobilation interphase periods, and the growth rate of the strobilae ratio increased with increasing CL390 gene expression. The ratio of strobilae at 12℃ was highest, and the strobilae showed the higher releasing ratios at both 12℃ and 16℃ compared with those at 4℃ and 8℃. Furthermore, more ephyrae were released at the higher final temperature. Additionally, up-regulation and down-regulation of the CL390 gene were observed in response to the four decreasing temperatures. Although the four CL390 gene transcript levels increased more significantly than the transcript levels of the RxR gene, similar trends were observed in both genes.
Key words:    moon jellyfish|strobila|retinoid x receptor (RxR)|CL390   
Received: 2016-08-05   Revised:
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