Journal
JOURNAL OF ENVIRONMENTAL SCIENCES
Volume 21, Issue 11, Pages 1552-1556Publisher
SCIENCE PRESS
DOI: 10.1016/S1001-0742(08)62454-7
Keywords
Pisum sativum; heavy metals; photosynthesis; growth
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Funding
- Tunisian Ministry of Higher Education,
- Scientific Research and Technology Research Unit
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The present work aimed to study the physiological effects of cadmium (Cd) and copper (Cu) in pea (Pisum sativum). Pea plants were exposed to increasing doses of cadmium chloride (CdCl2) and copper chloride (CuCl2) for 20 d. The examined parameters, namely root and shoot lengths, the concentration of photosynthetic pigments and the rate of photosynthesis were affected by the treatments especially with high metals concentrations. The analysis of heavy metals accumulation shows that leaves significantly accumulate cadmium for all the tested concentrations. However, copper was significantly accumulated only with the highest tested dose. This may explain the higher inhibitory effects of cadmium on photosynthesis and growth in pea plants. These results are valuable for understanding the biological consequences of heavy metals contamination particularly in soils devoted to organic agriculture.
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