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Effects of cadmium on chlorophyll content, photochemical efficiency, and photosynthetic intensity of Canna indica Linn.
Cheng, SP; Ren, F; Grosse, W; Wu, ZB; Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
2002
Source PublicationINTERNATIONAL JOURNAL OF PHYTOREMEDIATION
Volume4Issue:3Pages:239-246
AbstractThe effects of cadmium (Cd2+) on growth status, chlorophyll (Chl) content, photochemical efficiency, and photosynthetic intensity were studied on Canna indica Linn. Plant specimens that were produced from a constructed wetland and precultivated hydroponically in 20 L of 1/10 Hoagland solution under greenhouse conditions for I week were exposed to cadmium in concentrations of 0, 0.4, 0.8, 1.6 and 3.2 mg L- Cd2+, respectively. The results show that leaves were injured in the Cd2+ solution by the third day of exposure and the injury became more serious with an increase in the applied heavy metal. Under 3.2 mg L-1 Cd2+ treatment, growth retardation, the decrease of chlorophyll content from 0.70 to 0.43 mg g(-1) FW, and a decrease in Chl a/b ratio from 2.0 to 1.2 were observed. Chl a was more sensitive than Chl b to Cd2+ stress. The decrease was the same with photochemical efficiency. Photosynthetic intensity decreased by 13.3% from 1.5X10(4) mumol m(-2)s(-1) CO2 in control to 1.3x10(4) mumol m(2)s(-1) CO2 in the treatment of 3.2 mg L-1. Because Canna species are used in heavy metal phytoremediation, these results show that C. indica can tolerate 0.4 to 0.8 mg L-1 Cd2+. Therefore, it is a potential species for phytoremediation of cadmium with some limitations only at higher concentrations.
KeywordCanna Indica Linn. Chl A/b Ratio Constructed Wetland Heavy Metal Stress Loec Noec Photosynthesis Phytoremediation Pollution Control
DepartmentChinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; Univ Cologne, Inst Bot, D-50931 Cologne, Germany
Subject AreaEnvironmental Sciences
Indexed BySCI
WOS IDWOS:000179888000005
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9762
Collection期刊论文
Corresponding AuthorWu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Cheng, SP,Ren, F,Grosse, W,et al. Effects of cadmium on chlorophyll content, photochemical efficiency, and photosynthetic intensity of Canna indica Linn.[J]. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION,2002,4(3):239-246.
APA Cheng, SP,Ren, F,Grosse, W,Wu, ZB,&Wu, ZB, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China.(2002).Effects of cadmium on chlorophyll content, photochemical efficiency, and photosynthetic intensity of Canna indica Linn..INTERNATIONAL JOURNAL OF PHYTOREMEDIATION,4(3),239-246.
MLA Cheng, SP,et al."Effects of cadmium on chlorophyll content, photochemical efficiency, and photosynthetic intensity of Canna indica Linn.".INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 4.3(2002):239-246.
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