Effect of Heavy Metal Stress on Germination，Growth and Photosynthetic Characteristics of Poa pratensis L.(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effect of Heavy Metal Stress on Germination，Growth and Photosynthetic Characteristics of Poa pratensis L.

Author(s):: YIN Juan1; LI Ning2; （1.Forestry Institute，Xinyang Agroforestry Institute，Xinyang，Henan 464000；2.Department of Environmental Art Engineering，Henan Vocational and Technical College，Zhengzhou，Henan 450046）

Keywords:: Poa pratensis L.; heavy metal; germination; growth; photosynthetic characteristics

Abstract:: In the experiment，Poa pratensis L.was selected as the research material，the effect of three different heavy metals ions cadmium(Cd2+)，copper(Cu2+)，lead(Pb2+) and different concentration on seed germination，seedling growth and photosynthetic characteristic systematically were studied.The results showed that in the low concentration of Cd2+ (10 mg?kg-1) and Cu2+ (100 mg?kg-1) treatments,seed germination of Poa pratensis L.had been promoted in some extent and the seed germination rates reached 962% and 942% respectively，the germination index were 98 and 97 respectively，which were higher than the controls.When the concentration of Cd2+ was higher than 10 mg?kg-1 or Cu2+ concentration was higher than 100 mg?kg-1，the seed germination percentage and germination index were lower than the controls.When Cu2+ concentration was below 200 mg?kg-1，the seedlings height，total root length，biomass of aboveground and the content of chlorophyll，Fv/Fm values had a slight increase along with the increase of concentration.When Cu2+ concentration was higher than 200 mg?kg-1，significant decline appeared with the increase of concentration.In addition，seed germination，seedling growth and photosynthetic efficiency of Poa pratensis L.declined with the increase of concentration of Pb2+，and were lower than the controls.

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Last Update: 2016-10-31