Lemna (duckweed) as an indicator of acid water.

浮萍（浮萍）作为酸性水的指示剂。

• 批准号: 03670283
• 负责人: NASU Yutaka
• 金额: $ 1.28万
• 依托单位: Shinshu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03670283/
• 关键词: Lemna; heavy metals; indicator; acid water; cadmium; 植物指標; Lemna; heavy metals; indicator; acid water; cadmium; 植物指標

Lemna is a plant very sensitive to heavy metals and other water pollutants. Furthermore, it is useful for experiments because of its small size and rapid multiplication rate. We have made many attempts to use Lemna as an indicator species for the detection of water pollution. In this project, the study on the utilization of Lemna as an indicator of acid water was made.1. The Growth and the Multiplication of Lemna under various pHIt was made clear that the growth and the multiplication of Lemna were made most effectively on the medium adjusted to pH4 - 6. When Lemna was planted on the medium of pH3.6, it couldn't grow and died within 24hrs.2. The Absorption of Heavy Metals under Various pHThe sensitivity of Lemna to heavy metals was affected by medium pH. The high pH value of the medium affected Lemna more sensitive to heavy metals. And it was shown that more absorption and accumulation of heavy metals resulted in the high sensitivity to heavy metals of Lemna.3. The Growth of Lemna on the River Water and on the Rain WaterWhen grown on the rain water, the growth rate of Lemna was so little. The growth rate was larger on the medium of higher pH value.Growth on the river water and on the sewage water were also affected by medium pH.

Lemna是一种对重金属和其他水污染物非常敏感的植物。此外，由于其尺寸较小和快速乘法率，因此对实验很有用。我们已经尝试使用LEMNA作为检测水污染的指标物种。在该项目中，对利用LEMNA作为酸水的指标进行了研究1。在各种PHIT下的LEMNA的生长和繁殖清楚地表明，LEMNA的生长和繁殖是在调整为PH4-6的培养基上最有效的。当将LEMNA种植在PH3.6介质上时，它无法在24小时内生长并在24小时内死亡。2。在各种pH下，重金属的吸收受LEMNA对重金属的敏感性受到中等pH的影响。培养基的高pH值对LEMNA对重金属更敏感。结果表明，重金属的更多吸收和积累导致对Lemna的重金属的高灵敏度3。 Lemna在河水上的生长以及在雨水上生长时的雨水，Lemna的生长速度很少。在较高的pH值的介质上，生长速率也较大。