摘要
通过模拟静态浅水性水培环境,研究5种质量浓度镉对金鱼藻(Ceratophyllumdemersum L.)、伊乐藻(Elodea nuttallii)、苦草(Vallisner-ia natans)的生物量、生长率、叶绿素及可溶性蛋白质量比的影响。结果表明,3种沉水植物的生物量、相对生长率及叶绿素质量比,随镉质量浓度升高呈显著下降趋势,叶绿素活性及茎叶中可溶性蛋白质量比呈先升后降的趋势。金鱼藻与伊乐藻的叶绿素活性在镉质量浓度为10μg/L时最高,可溶性蛋白质量比在镉质量浓度为5μg/L时达最大;而苦草的叶绿素活性在镉质量浓度为5μg/L时最大,可溶性蛋白质量比在镉质量浓度为10μg/L时最大。
This research is aimed at providing a theoretical guidance and experimental basis for the application of submerged maerophytes to treat the effects of heavy-metal sewage pollution on the five concen- trations of cadmium（Cd） to the biomass, the growth rate, the ehloro- phyll content, the chlorophyll activities and the soluable protein of CeratophyUum demersum L. , Elodea nuttallii and Vallisneria natans through imitating the static and shallow water environment. For our research purpose, we have chosen the well grown Ceratophyllum de-mersum L. , Elodea nuttallii and Vallisneria natans as the material to be tested, with the 1/4 Hoagland liquid as the culture medium on the basis for determinating the Cd test concentration in the preliminary tests. We have conducted our formal tests lasting for 40 days in hop- ing to find the biomass, relative growth rate, the chlorophyll content and chlorophyll activity of the above said three submerged macro- phytes under different Cd stresses. The results show that the effects for treating turn to be different due to the different concentrations of cadmium（Cd） used and the different sampling times. It was found that the biomass, the relative growth rate and the chlorophyll contents of the three submerged macrophytes prove to noticeably decrease with the increase of cadmium（Cd） concentration, but the chlorophyll ac- tivity and the soluble protein content tend to increase first and then decrease. We have also found that the chlorophyll activities and solu- ble protein content of CeratophyUum Demersum L. would reach the highest point with the Cd concentration being 10 μg/L and 5 μg/L re- spectively, but the Elodea nuttallii being the same as CeratophyUum Demersum L.. Moreover, when the chlorophyll activity and the solu- ble protein content of Vallisneria natans reached the highest degree with the Cd concentration being 5μg/L and 10 μg/L respectively, the concentration change of cadmium（Cd） was supposed to affect the growth of the three submerged macrophytes. It al
出处
《安全与环境学报》
CAS
CSCD
北大核心
2013年第1期9-14,共6页
Journal of Safety and Environment
基金
国家水专项(08zx07101-005-02)
上海市科委重大专项(08dz21900408)
国家科技计划项目(2005BA908B23)
上海市重点学科建设项目(Y1101
S307017)
关键词
环境科学技术其他学科
镉胁迫
生理响应
金鱼藻
伊乐藻
苦草
other disciplines of environmental science and technolo-gy
cadmium stress
physiological response
Cerato-phyllum demersum L.
Elodea nuttallii
VaUisnerianatans
