| 摘要: |
| 锌是海洋微藻生长必需的金属元素，低浓度时可促进微藻的生长，而在高浓度时则表现为抑制其生长。受人类活动的影响，海洋中锌有富集增加的趋势，从而会对海洋微藻的生长产生影响。本论文探究了锌离子以及纳米氧化锌对硅藻中肋骨条藻（Skeletonema costatum）和新月菱形藻（Nitzschia closterium）生长的影响，特别是对藻源氨基酸产生的影响，结果发现：纳米金属颗粒会通过释放离子的形式抑制海洋浮游植物的生长，中肋骨条藻比新月菱形藻对锌的响应更敏感。锌离子和纳米氧化锌可通过抑制浮游植物的生长来减少氨基酸的释放量和改变藻源氨基酸的种类，从而可能会对海洋氮循环过程产生影响。 |
| 关键词: 锌 藻源氨基酸 锌纳米颗粒 新月菱形藻 中肋骨条藻 |
| DOI：10.11759/hykx20190126002 |
| 分类号:X173;Q946.1 |
| 基金项目:国家自然科学基金（41876078）；山东省基金（ZR2018MD016） |
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| Effect of heavy metal Zinc on the output of amino acids in marine algae |
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HUANG Wen-qiu, ZHOU Yu-ping, TAN Li-ju, WANG Jiang-tao
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College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
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| Abstract: |
| Zinc is an essential metal for marine microalgae. Low concentrations of zinc promote the growth of microalgae, while zinc can inhibit the growth of microalgae at higher concentrations. Under the influence of human activities, the enrichment of zinc in the ocean tends to increase, which will have great impacts on the growth of marine microalgae. This article investigated the effects of zincous ions and zinc nano-particles on Skeletonema costatum and Nitzschia closterium and the production of algae-derived amino acid. The results showed that zinc nano-particles inhibited the growth of marine phytoplankton by releasing ions. As compared to Nitzschia closterium, the Skeletonema costatum was more sensitive to zinc. Zinc may affect the marine nitrogen cycle by reducing the growth of phytoplankton, which causes a reduced release of amino acids and alters the types of released algae-derived amino acids. |
| Key words: zinc algae-derived amino acid zinc nano-particles Nitzschia closterium Skeletonema costatum |
