Sillanpää J Kirsikka, Cardoso Joao Carlos Dos Reis, Félix Rute Castelo, Anjos Liliana, Power Deborah Mary, Sundell Kristina
Fish Endocrinology Laboratory, Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
Comparative Endocrinology and Integrative Biology, Centre of Marine Sciences, Universidade do Algarve, Faro, Portugal.
Front Physiol. 2020 Jan 22;11:1. doi: 10.3389/fphys.2020.00001. eCollection 2020.
Varying salinities of coastal waters are likely to affect the physiology and ion transport capabilities of calcifying marine organisms such as bivalves. To investigate the physiological effect of decreased environmental salinity in bivalves, adult oysters () were exposed for 14 days to 50% seawater (14) and the effects on mantle ion transport, electrophysiology and the expression of Ca transporters and channels relative to animals maintained in full strength sea water (28) was evaluated. Exposure of oysters to a salinity of 14 decreased the active mantle transepithelial ion transport and specifically affected Ca transfer. Gene expression of the Na/K-ATPase and the sarco(endo)plasmic reticulum Ca-ATPase was decreased whereas the expression of the T-type voltage-gated Ca channel and the Na/Ca-exchanger increased compared to animals maintained in full SW. The results indicate that decreased environmental salinities will most likely affect not only osmoregulation but also bivalve biomineralization and shell formation.
沿海水域盐度的变化可能会影响钙化海洋生物（如双壳贝类）的生理机能和离子转运能力。为了研究环境盐度降低对双壳贝类的生理影响，将成年牡蛎（）置于50%海水（14）中14天，并评估其对套膜离子转运、电生理学以及与维持在全强度海水（28）中的动物相比钙转运体和通道表达的影响。将牡蛎暴露于盐度为14的环境中会降低套膜上皮的主动离子转运，并特别影响钙的转运。与维持在全强度海水中的动物相比，钠钾ATP酶和肌浆内质网钙ATP酶的基因表达降低，而T型电压门控钙通道和钠钙交换体的表达增加。结果表明，环境盐度降低不仅很可能影响渗透调节，还会影响双壳贝类的生物矿化和贝壳形成。
