查询词典 Lemna minor

Heavy metal pollution ; Lemna minor ; antioxidant enzymes ; eutrophication ; ecological restoration

重金属污染；青萍；抗氧化酶；富营养化；生态修复

The concentrations of TN in all the treatments decreased to lower levels at the middle and latter periods of the experiment, and those of TP also decreased at larger extents. Compared with the control, DDT at 200μg·L-1 inhibited growth and reproduction of the dominant macrophyte Lemna minor, but the reverse was found for DDT at other concentrations.

和对照组相比，200.0μg·L-1的DDT对大型水生植物优势种类浮萍的生长繁殖具有抑制作用，而其它浓度的DDT具有促进作用；DDT对菹草的生长影响不明显。

To check the abilities of Zn uptake and accumulation of duckweed (Lemna minor Linn.), experiments of growth, Zn accumulation and SOD activitial response to Zn in plant duckweed were performed with fresh plant in vivo. The results showed that growth of duckweed was affected by 5 mg/L Zn treatmenat in solution, indicating better resistance to Zn.

为探询浮萍对水体Zn的吸收富集能力，为水体Zn污染的植物修复提供依据，采用水培方法对浮萍的Zn的吸收富集特性及生物量、抗性进行分析，同时也对Zn处理条件下，浮萍体内SOD酶活性变化进行了测定。

As for the monitor of water pollution, Lemna minor, Spirodela polyrrhiza shleid and Azalla imbricate Nakai could be used as the monitors for the naphthalene pollution in water body because of their sensitivity to it.

在净化过程中，萘对5种水生植物产生生理毒害作用，且随萘浓度的增加显示出明显的毒害效应，表现为呼吸强度受到抑制，叶绿素含量降低；对POD而言，凤眼莲、喜旱莲子草随萘浓度增加逐渐升高，而浮萍、紫萍则表现出先升高然后降低，满江红一直降低。

By imitating different concentration of Cd2+ Cu2+ Cr3+ Cr6+and Zn2+polluted water environment,we mainly studied their toxic effects on aquatic piants by means of measurement of physiologicai indexes and electron microscopy observation as well as the relieving to Cu2+ injury of antioxidase enzyme system in Lemna minor L. and Vallisneria asiatica Miki in this paper by throwing Ce.the experimental results showed that Cd2+ Cu2+ Cr3+ Cr6+ and Zn2+ might injure photosynthetic systems, protective enzyme system, substance metabolism systems and cell ultrastructure of the plant.

本文通过模拟不同浓度梯度的重金属Cd~(2+)、Cu~(2+)、Cr~(3+)、Cr~(6+)和Zn~(2+)污染环境，利用生理生化测定、扫描电镜、透射电镜、气相色谱及激光共聚焦等实验手段，研究了四种金属离子对不同生态型的水生植物的毒害影响，初步探索了Ce对浮萍Cu害的缓解效应和La、Zn及其交互作用对浮萍活性氧清除系统影响。

Further more, the simplified analysis method on stressed-skin effect of corrugated steel sheet is also discussed in detail.

此外还比较详细地探讨了蒙皮效应的简化分析方法。

If I had known her telephone number,I would have called her.

要是我知道她的电话号码，我就打电话给她了。