No difference in activity of Sod-1 genotypes of Poa annua to short-term treatment of ambient gaseous organic pollution

Article type: Research Article

Authors: CAI, Yue-wei | CHEN, Xiao-yong

Affiliations: Shanghai Key Laboratory for Ecological Processes and Restoration in Urban Areas, Department of Environmental Sciences, East China Normal University, Shanghai 200062, China

Note: [] Corresponding author. E-mail: [email protected]

Abstract: Our previous studies indicated that genotypes at locus Sod-1 of Poa annua changed clinally along a gradient of gaseous organic pollution. In the present study, we aimed to know whether there were differential responses of activities of different superoxide dismutase (SOD) genotypes to short-term treatment of ambient gaseous organic pollution. Significant bias from Hardy-Weinberg equibrium was observed on locus Sod-1, and no genotype Sod-1-BB was found. Significantly increased activities were observed in most treatments for genotype Sod-1-AA and in one treatment for genotype Sob-1-AB. However, no significant difference in SOD activities was found between the two genotypes. It was interpreted that fitness difference between the two genotypes was small and treatment duration was too short or extent of ambient organic pollution was too low to lead to differential responses. Other environmental factor effects on activities of superoxide dismutases can also explain the results.

Keywords: superoxide dismutase, genotype, activity, gaseous organic pollution, Poa annua

Journal: Journal of Environmental Sciences, vol. 17, no. 5, pp. 866-868, 2005