Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile; Laboratorio Costero de Recursos Acuáticos de Calfuco, Universidad Austral de Chile, Valdivia, Chile.
Instituto de Ciencias Marinas y Limnológicas, Universidad Austral de Chile, Valdivia, Chile.
Mar Environ Res. 2022 Sep;180:105711. doi: 10.1016/j.marenvres.2022.105711. Epub 2022 Jul 31.
Intracapsular embryonic development in the intertidal zone exposes embryos to various stress sources characteristic of this environment, including UV-R. They require defensive mechanisms to mitigate its adverse effects. The presence of total carotenoids (TC), and mycosporine-like amino acids (MAAs) was studied in adults, in encapsulated embryos, and in the egg capsule walls of the intertidal gastropod Acanthina monodon. Oxygen consumption rates (OCR) were determined in encapsulated and excapsulated embryos exposed to photosynthetically active radiation (PAR) and PAR + UV-A + UV-B to understand if the capsule wall is a protective structure for encapsulated embryos. The results showed the presence of TC in adult pedal and gonad tissues, and in all encapsulated stages. MAAs were not detected. The physical structure of the capsule wall retained most wavelengths, being particularly efficient in the UV-B range. Excapsulated embryos exposed to PAR + UV-A + UV-B radiation increased its OCR compared to encapsulated embryos, indicating the protective character of the capsule wall.
在潮间带，囊内胚胎的发育使胚胎暴露于各种具有该环境特征的应激源中，包括 UV-R。它们需要防御机制来减轻其不利影响。在潮间带腹足纲动物 Acanthina monodon 中，研究了成年个体、囊内胚胎以及卵囊壁中总类胡萝卜素 (TC) 和菌醇氨基酸 (MAA) 的存在。在暴露于光合有效辐射 (PAR) 和 PAR+UV-A+UV-B 的囊内和去囊内胚胎中测定了耗氧率 (OCR)，以了解卵囊壁是否为囊内胚胎的保护结构。结果表明，TC 存在于成年足和性腺组织以及所有囊内阶段。未检测到 MAA。卵囊壁的物理结构保留了大部分波长，在 UV-B 范围内尤其有效。与囊内胚胎相比，暴露于 PAR+UV-A+UV-B 辐射的去囊内胚胎的 OCR 增加，表明卵囊壁具有保护作用。
