Journal of Aquaculture Research & Development

Variation of carotenoid content and transcripts of SRB genes in the noble scallop Chlamys nobilis under different light

3^rd International Conference on Aquaculture & Fisheries

September 29-October 01, 2016 London, UK

Huaiping Zheng and Zhicheng Guo

Shantou University, China

Posters & Accepted Abstracts: J Aquac Res Development

Abstract:

Carotenoids are bright yellow and red fat-soluble pigments and play important physiological roles in animals. However, animals cannot synthesize carotenoids themselves, they must acquire carotenoids through diet. Therefore, carotenoids accumulating in animal tissues can be affected by environmental and physiological factors. Moreover, carotenoids accumulation in animals can be controlled by some genes such as scavenger receptor class B type (SRB). The noble scallop Chlamys nobilis Reeve, a warm water bivalve, has been cultivated as an economic species in southern China since 1980s. Two stain scallops of orange and brown with different carotenoids content have been selected by a genetic and breeding program since 2008 in our laboratory. Carotenoids content in scallopsâ?? muscle of the orange strain is significantly higher than that of the brown strain. In the study, 240 scallops with the same age of 17 months old including 120 orange and 120 brown were used in order to evaluate effect of light on total carotenoids content (TCC) and transcripts of SRB-like-1 and SRB-like-4 gene in adductor and blood. Each strain scallops were all conducted randomly by three experimental treatments of full-light (24 h light), half-light (12 h light:12 h dark) and full-dark (24 h dark) for 10 days. The result showed that the light affected TCC and SRB transcripts, but it is different between orange and brown strains. For orange scallops, TCC in adductor is significantly higher in full-light than that in half-light and full-dark, whereas TCC in blood is significantly higher in full-dark than that in full-light and half-light. For brown scallops, TCC in both adductor and blood is significantly higher in fulldark than that in full-light and half-light. For transcripts of SRB-like-1 and SRB-like-4 gene, the highest value was in blood of brown scallops under half-light, whereas the lowest value was in blood of orange scallops under full-light. Therefore, the mechanism of accumulating carotenoids in orange and brown scallops may be different.

Biography :

Email: hpzheng@stu.edu.cn