藻源性颗粒有机物对磷饥饿微囊藻磷富集与生长的影响

发布时间：2018-06-19 08:07

本文选题：藻源性颗粒有机物 + 磷富集　；参考：《中国环境科学》2016年12期

【摘要】：以藻源性颗粒有机物为切入点,分别以正磷酸盐(K_2HPO_4)、多聚磷酸盐(Na_5P_3O_(10))、磷酸单酯(G-6-P)、磷酸二酯(卵磷脂)为参考,对比研究了不同形态的磷对磷饥饿微囊藻生长及对磷富集的影响.研究发现密度为(1.9±0.1)×10~6cells/m L磷饥饿处理的微囊藻对不能直接利用的(Na_5P_3O_(10)、卵磷脂的短期富集作用分别为2.034mg/L、1.030mg/L要明显高于K_2HPO_4的0.491mg/L、G-6-P的0.034mg/L和藻源性颗粒物的0.573mg/L,可能与这些磷素不能迅速进入细胞内,因而被大量的积聚在细胞膜与细胞壁之间有关.微囊藻通过释放碱性磷酸酶等酶系可以大量快速的利用藻源性颗粒物,藻源性颗粒物组中微囊藻生长率0.148d~(-1)稍低于K2HPO4组的0.156d~(-1),但均高于其他实验组.实验结束时微囊藻对藻源性颗粒物的利用率57.8%高于K_2HPO_4组的32.5%和卵磷脂组的24.4%.通过液相核磁分析,藻源性颗粒物中磷的组分主要为正磷酸盐、磷酸单酯,并通过计算验证了其对磷饥饿铜绿微囊藻的磷富集与生长的影响.综上,藻源性颗粒物有着极强的生物可利用性,对蓝藻的爆发和持续性有着重要影响.
[Abstract]:With phytogenic particulate organic matter as the starting point, the effects of phosphorus forms on the growth and enrichment of phosphorus starvation microcystis were studied, respectively, using orthophosphate K2HPO4D, polyphosphate Na5P3OT, phosphate monoester G-6-PU and phosphodiester (lecithin) as reference. The results showed that microcystis with a density of 1.9 卤0.1 脳 10~6cells/m / L P starvation had significantly higher short-term enrichment of lecithin than 0.491mg / L of 0.491mg / L of K _ 2HPO _ 4 and 0.573mg / L of phytogenic particulates and 0.573mg / L of algal-derived particulates, respectively, and the short-term enrichment of lecithin was 2.034 mg / L, respectively, compared with 0.491mg / L of 0.491mg / L of K _ 2HPO _ 4 and 0.573mg / L of phytogenic particulates. It is therefore accumulated in large quantities between the cell membrane and the cell wall. Microcystis release alkaline phosphatase and other enzyme systems can make a large and rapid use of phytoplankton particles. The growth rate of microcystis in microcystis group is slightly lower than that in K2HPO4 group at 0.156 days, but it is higher than that in other experimental groups. At the end of the experiment, the utilization rate of microcystis for algal particulates was 57.8% higher than that of K2HPO4 group (32.5%) and lecithin group (24.4g%). The main components of phosphorus in algal particulate matter were orthophosphate and phosphate monoester. The effect of phosphorus enrichment and growth on phosphorus starvation microcystis aeruginosa was verified by calculation. In conclusion, algal particulate matter has a strong bioavailability, which has an important impact on the eruption and sustainability of cyanobacteria.
【作者单位】：环境保护部南京环境科学研究所;江苏环保产业技术研究院股份公司;中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室;
【基金】：国家水体污染控制与治理科技重大专项课题(2014ZX07101-011;2012ZX07101-007) 国家自然科学基金项目(41301550)
【分类号】：X52;X173

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