盐度作为一种非生物胁迫因子，可诱导海洋微藻产生生物活性化合物。

Salinity as an Abiotic Stressor for Eliciting Bioactive Compounds in Marine Microalgae.

机构信息

Department of Chemical Engineering, University of Almeria, 04120 Almeria, Spain.

Research Centre on Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), University of Almeria, 04120 Almeria, Spain.

出版信息

Toxins (Basel). 2024 Oct 1;16(10):425. doi: 10.3390/toxins16100425.

This study investigated the impact of culture medium salinity (5-50 PSU) on the growth and maximum photochemical yield of photosystem II (/) and the composition of carotenoids, fatty acids, and bioactive substances in three marine microalgae (, , and ). The microalgae were photoautotrophically cultured in discontinuous mode in a single stage (S1) and a two-stage culture with salt shock (S2). A growth model was developed to link biomass productivity with salinity for each species. achieved a maximum biomass productivity () of 15.85 ± 0.32 mg·L·day in S1 and 16.12 ± 0.13 mg·L·day in S2. The salt shock in S2 notably enhanced carotenoid production, particularly in and , where fucoxanthin was the main carotenoid, while peridinin dominated in . also exhibited increased fatty acid productivity in S2. Salinity changes affected the proportions of saturated, monounsaturated, and polyunsaturated fatty acids in all three species. Additionally, hyposaline conditions boosted the production of haemolytic substances in and

本研究调查了培养基盐度（5-50 PSU）对三种海洋微藻（、和）的生长和光合作用 II 系统（/）最大光化学产量以及类胡萝卜素、脂肪酸和生物活性物质组成的影响。微藻采用间断式培养在单一阶段（S1）和盐冲击的两阶段培养（S2）中进行光自养培养。为每种物种开发了一个将生物量生产力与盐度相关联的生长模型。在 S1 中达到了 15.85 ± 0.32 mg·L·day 的最大生物量生产力（），在 S2 中达到了 16.12 ± 0.13 mg·L·day。S2 中的盐冲击显著提高了类胡萝卜素的产量，特别是在和中，其中岩藻黄质是主要的类胡萝卜素，而在中则以原甲藻素为主。在 S2 中也表现出脂肪酸生产力的增加。盐度变化影响了所有三种物种中饱和、单不饱和和多不饱和脂肪酸的比例。此外，低盐条件促进了和中溶血物质的产生。