Journal of Food, Agriculture and Environment
Vol 10,
Issue 1,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Influence of photosynthesis and chlorophyll synthesis on Cd accumulation in Populus×canescens
Author(s):
Hui-Ping Dai 1,
Yuan Wei 2, Yazhuan Zhang 1, Pengxiang Gao 3, Jiwei Chen 4, Genliang Jia 1, Tuxi Yang 3, Shijing Feng1, Chaofeng Wang 3, Yuan Wang 1, Wenqing Sa 3, Anzhi Wei 3*Recieved Date: 2011-11-18, Accepted Date: 2012-01-03
Abstract:The aim of this study was to study the relationship between growth inhibitions in cadmium (Cd) treated Populus×canescens and photosynthesis. After 12-week cultivation, the Populus×canescens were treated with five CdSO4·7 H2O concentrations of 0 (control), 10, 30, 50, and 70 µM CdSO4 for 7, 14, 21 and 28days. The responses of Populus×canescens leaves to Cd addition depend on their growth stage. Our results suggest that the leaves exhibited a significant decline in photosynthesis and chlorophyll (a and b). After 70 µM Cd exposed for 28 days, net CO2 assimilation increased at a nearly constant intercellular CO2 mole fraction, indicating that stomatal closure did not account for the inhibition of photosynthesis. This decline in photosynthesis is probably a consequence of an altered source relationship, rather than due to a toxic effect of Cd on photosynthesis.
Keywords:Cadmium,
photosynthesis, chlorophyll, Populus×canescensJournal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 1
Category: Environment
Pages: 1020-1023
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