Study on the Characteristics of Microcystis aeruginosa Chlorophyll Fluorescence Responding on the Toxicity of HgCl2

Jian Sheng Cui; Xiao Hui Xu; Yu Xin Cheng

doi:10.4028/www.scientific.net/AMR.726-731.1538

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Study and Application on Detection of Groundwater Water Quality On-Line Monitoring Index
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Study on the Characteristics of Microcystis aeruginosa Chlorophyll Fluorescence Responding on the Toxicity of HgCl₂
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The Vegetation Structure and Floral Changes of 5 Years after Restoration of Cheonggyecheon Stream in Korea
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Ultrasonic Wave Extraction and Simultaneous Analysis of Polycyclic Aromatic Hydrocarbons (PAHs) and Phthalic Esters in Soil
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Variational Characteristics of Water Quality of Produced Formation Water in Coalbed Methane Production Area
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Study on the Characteristics of Microcystis...

Study on the Characteristics of Microcystis aeruginosa Chlorophyll Fluorescence Responding on the Toxicity of HgCl₂

Abstract:

Chlorophyll fluorescence is a quick, precise, non-invasive technique which has been widely used in studies of photosynthesis in micro algae, particularly for investigations of stress physiology of micro algae. The toxicity of heavy metal Hg²⁺ on alga M. aeruginosa was studied by the change in fluorescence intensity of M. aeruginosa at 435 nm/680 nm which treaded with different Hg²⁺ concentrations for 25 min. The results showed that high concentrations of Hg²⁺ inhibited the photosynthesis of M. aeruginosa, while a low concentration (0.0005 mg/L) of Hg²⁺ promoted photosynthesis. When Hg²⁺ level range from 0.001 mg/L to 0.500 mg/L, it had significant inhibition effects on photosynthesis of M. aeruginosa. The chlorophyll fluorescence intensity increased with the concentration of Hg²⁺ (0.001~0.400 mg/L), even the concentration of Hg²⁺ and algal photosynthetic signal had a significant positive correlation, r=0.983 3.