盐度作为一种非生物应激剂,用于在海洋微藻中引起生物活性化合物
Adrián Macías-de la Rosa1, Lorenzo López-Rosales1,2, Antonio Contreras-Gómez1,2
1Department of Chemical Engineering, University of Almeria, 04120 Almeria, Spain.
Toxins
|October 25, 2024
概括
海洋微藻的生长和生物活性化合物的产生受盐度的影响. 在特定物种中,使用盐冲击增强的胡卜素和脂肪酸产量的两级培养,影响了整体生物质生产率.
科学领域:
- 海洋生物技术 海洋生物技术
- 微藻种植的培养方法
- 生物产品是生物产品.
背景情况:
- 海洋微藻是生物燃料,营养药品和药品的重要资源.
- 优化培养条件,如盐度,对于最大限度地提高微藻生物质和有价值化合物生产至关重要.
- 了解物种对盐度压力的特定反应是高效工业应用的关键.
研究的目的:
- 研究不同盐度水平 (5-50 PSU) 对三种海洋微藻的生长,光系统II效率 (Fv/Fm) 和生物化学组成的影响.
- 为了比较单阶段 (S1) 和双阶段 (S2) 培养系统,包括盐冲击,提高生产效率.
- 开发一种生长模型,将生物质生产率与*Chrysochromulina rotalis*,*Amphidinium carterae*和*Heterosigma akashiwo*的盐度联系起来.
主要方法:
- 在不同的盐度条件下,三种海洋微藻在不连续模式下进行光自营养培养.
- 实施单阶段 (S1) 和双阶段 (S2) 培养系统,使用盐冲击.
- 测量生长参数,最大光化学产量 (Fv/Fm),并分析胡卜素,脂肪酸和生物活性物质组成.
主要成果:
- 在S2条件下,最大生物质生产率 (Pmax) 在C. rotalis中达到16.12 mg·L−1·day−1 .
- 在S2中,盐冲击显著增强了胡卜素的生产 (C. rotalis和H. akashiwo中的fucoxanthin;A. carterae中的peridinin) 和H. akashiwo中的脂肪酸生产力.
- 盐度影响了脂肪酸 (和,单不和,多不和) 概况,并在低盐条件下增加了*A. carterae*和*C. rotalis*的血液溶解物质的产生.
结论:
- 具有盐冲击 (S2) 的两级培养系统有效地提高了生物质生产率和海洋微藻中的特定有价值化合物.
- 对度压力的特定物种反应强调了针对不同微藻菌株量身定制的培养策略的重要性.
- 盐度操纵提供了一个可行的策略,以优化海洋微藻产生的胡卜素,脂肪酸和生物活性物质的生产.
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