| 海水中的红霉素与营养盐对微藻的复合影响 |
| 摘要点击 1466 全文点击 494 投稿时间：2019-11-26 修订日期：2020-02-16 |
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| 中文关键词 红霉素 营养盐 微藻 生物量 生理指标 |
| 英文关键词 erythromycin nutrients microalgae biomass physiological index |
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| 中文摘要 |
| 大量的抗生素及其代谢产物最终会进入海洋，其对海洋生态系统的潜在威胁值得关注.研究了不同浓度的红霉素和营养盐对2种甲藻——米氏凯伦藻（Karenia mikimotoi）、东海原甲藻（Prorocentrum donghaiense）和1种硅藻——中肋骨条藻（Skeletonema costatum）的生物量、光合色素含量、蛋白质含量、超氧化物歧化酶（SOD）活性和丙二醛（MDA）含量的影响，以此来探究海水中红霉素与营养盐限制是否会对微藻产生复合影响，评估不同的营养状态下红霉素对海洋生态的影响.结果表明，营养盐限制会降低米氏凯伦藻、东海原甲藻和中肋骨条藻对红霉素的耐受限度.本实验范围内（0~1000 μg·L-1），红霉素对米氏凯伦藻的生长无显著影响，高浓度的红霉素（≥100 μg·L-1）会显著抑制东海原甲藻和中肋骨条藻的生长，这3种微藻中中肋骨条藻对红霉素敏感性最高. |
| 英文摘要 |
| A large number of antibiotics and their metabolites eventually enter the ocean, and their potential threat to marine ecosystems demands attention. In this study, Karenia mikimotoi, Prorocentrum donghaiense, and Skeletonema costatum were selected to investigate the effects of different concentrations of erythromycin and nutrients on microalgae biomass, photosynthetic pigment contents, protein contents, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content. The possibility of whether erythromycin and nutrient limitation can have combined effects on microalgae was explored, and under different nutritional conditions, the impact of erythromycin on marine ecology was evaluated. The study found that nutrient limitation reduces the tolerance of Karenia mikimotoi, Prorocentrum donghaiense, and Skeletonema costatum to erythromycin. Erythromycin in the experimental range (0-1000 μg·L-1) had no significant effect on the growth of Karenia mikimotoi. However, high concentrations of erythromycin (≥100 μg·L-1)significantly inhibited the growth of Prorocentrum donghaiense and Skeletonema costatum. The sensitivity of Skeletonema costatum was the most pronounced. |
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