Complex toxic effects of Cd2+, Zn2+, and acid rain on growth of kidney bean (Phaseolus vulgaris L).
Complex toxic effects of Cd2+, Zn2+, and acid rain on growth of kidney bean (Phaseolus vulgaris L) were studied in a pot experiment by measurement of fresh weights of the plants, determination of surperoxide dismutase (SOD), peroxidase (POD), and lipid peroxidation (MDA) in the plant organs, and observation of injury symptoms. The experimental results demonstrated that all treatments of Cd2+, Zn2+, and/or acid rain significantly decreased fresh weights of kidney bean and caused toxic effects on growth of the plants, especially higher amounts of Cd2+ and Zn2+ and higher acidity of acid rain. Combination of these three pollutant factors resulted in more serious toxic effects than any single pollutant and than combinations of any two pollutants. SOD, POD, and MDA in the plant organs changed with different pollution levels, but MDA content in the leaves showed the best relationship between the pollution levels and toxic effects.
Liao
Bo-han
BH
College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China. liao.bh@tom.com
Liu
Hong-yu
HY
Zeng
Qing-ru
QR
Yu
Ping-zhong
PZ
Probst
Anne
A
Probst
Jean-Luc
JL
D015258:Acid Rain / Q000633:toxicity*; D002104:Cadmium / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects; D008315:Malondialdehyde / Q000378:metabolism; D009195:Peroxidase / Q000378:metabolism; D027805:Phaseolus / Q000187:drug effects* / Q000201:enzymology / Q000254:growth & development; D018515:Plant Leaves / Q000201:enzymology; D018517:Plant Roots / Q000201:enzymology; D018547:Plant Stems / Q000201:enzymology; D013482:Superoxide Dismutase / Q000378:metabolism; D015032:Zinc / Q000633:toxicity*
D015258:Acid Rain; D002104:Cadmium; D008315:Malondialdehyde; D009195:Peroxidase; D013482:Superoxide Dismutase; D015032:Zinc