Ambient ultraviolet B radiation induced valve behavioral acclimation of Pacific oyster which resulted from the different response strategies of smooth and striated adductor muscles

• Published in: Ecotoxicology and Environmental Safety
• Main Authors: Hongce Song, Lei Wei, Mingyu Zhong, Xi Chen, Chaoyi Xie, Xiao Chen, Xiaona Wang, Baoyu Huang, Yaqiong Liu, Meiwei Zhang, Yitao Qi, Xiaotong Wang
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2021
• Subjects: UVB exposure; Crassostrea gigas; Valve behavior; Adductor muscle; Metabolomics; Environmental pollution; TD172-193.5; Environmental sciences; GE1-350; Pacific; Pacific oyster
• Online Access: https://doi.org/10.1016/j.ecoenv.2021.113035; https://doaj.org/article/74dfc8bc279147f093c44bf945e03d2f

Light not only conveys image-forming vision but also has an impact on various physiological functions. In particular, ultraviolet B (UVB) radiation has the closest relationship with living organisms. For Pacific oysters (Crassostrea gigas), alteration of valve behavior is one of the most important ways responding to ambient UVB. In the present study, the response of adult C. gigas to sunlight (especially UVB) was evaluated by monitoring valve activity and further elucidated at the physiological and metabolomic levels. After exposure, the valve activity of C. gigas demonstrated flexible acclimation to the ambient conditions. The potential adjustment of osmoregulation and oxidative stress might be related to ambient UVB radiation. Mycosporine-like amino acids might contribute to the protection of C. gigas against UVB, while precursors of β-alanine and degradation products of 5-hydroxytryptamine might adjust the contraction of the adductor muscles. The different responses of the adductor muscles (smooth and striated) were manifested in signal transduction and metabolisms of energy and nucleotide. This study not only indicated the correlation between the valve behavioral changes in oysters and light radiation, especially UVB, but illustrated the acclimation strategies of oysters to ambient light (UVB) environment.