Responses of rice growth to copper stress under free-air CO2 enrichment (FACE)
- 61 Downloads
The responses of rice to the second degree contamination of copper were studied by pot experiments under free-air CO2 enrichment (FACE) with 570 μmol·mol−1 of CO2. The results showed that the content of copper in rice leaves was reduced with the CO2 concentration reaching 570 μmol·mol−1 and this happened more significantly under the second degree contamination of copper. Under FACE, activities of superoxide dismutase (SOD) enzyme in rice leaves treated by copper contamination were induced, whereas the contents of glutathione (GSH) and glutathione disulfide (GSSG) had no significant difference from the control. In the presence of ambient CO2, activities of SOD enzyme treated by copper pollution were suppressed during the whole rice growth, however, the contents of GSH and GSSG were induced at tillering and jointing stages, and then restored to the control levels in later growth under the second degree contamination of copper. With the rice growing, the content of malondialdehyde (MDA) rises continuously, but there had been no significant difference between the treatments at the same growth stage. Further studies are needed on the response mechanism of rice to Cu stress under elevated CO2.
KeywordsFACE (free-air CO2 enrichment) rice soil contamination copper SOD GSH MDA
Unable to display preview. Download preview PDF.
- 6.Kimball B A, Zhu J G, Cheng L, et al. Responses of agricultural crops to free-air CO2 enrichment. Chin J Appl Ecol (in Chinese), 2002, 13(10): 1323–1338Google Scholar
- 13.Liu G, Han Y, Zhou J G, et al. Rice-wheat rotational FACE platform I. System structure and control. Chin J Appl Eco (in Chinese), 2002, 13(10): 1253–1258Google Scholar
- 17.Chen Y Q. Biochemistry Experiment Method and Technology (in Chinese). Beijing: Science Press, 2002. 197–199Google Scholar
- 19.Hu J L, Lin X G, Chu H Y, et al. A review on soil microbial responses to elevated atmospheric CO2 concentration. Chin J Soil Sci, 2006, 37(3): 601–605Google Scholar