Relationships between plant photosynthesis,radial oxygen loss and nutrient removal in constructed wetland microcosms |
| |
| Affiliation: | 1. MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, China;2. Joint Laboratory of Laser Oncology with Cancer Center of Sun Yet-sen University, South China Normal University, Guangzhou, China;3. School of Life Science, South China Normal University, Guangzhou, China;1. School of Life Sciences, South China Normal University, Guangzhou 510631, China;2. School of Psychology, Center for Studies of Psychological Application, South China Normal University, Guangzhou 510631, China;3. Institute for Brain Research and Rehabilitation, South China Normal University, Guangzhou 510631, China;1. School of Life Sciences, The Chinese University of Hong Kong, Hong Kong;2. School of Life Sciences, South China Normal University, Guangzhou, PR China;3. Department of Physiology, Justus Liebig University Giessen, Germany;4. School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong;5. Key Laboratory for Regenerative Medicine, Ministry of Education, The Chinese University of Hong Kong, Hong Kong;6. State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong;7. Centre for Novel Biomaterials, The Chinese University of Hong Kong, Hong Kong |
| |
| Abstract: | ![]()
The objective of this study was to investigate the relationships between root radial oxygen loss (ROL), photosynthesis, and nutrient removal, based on the hypothesis that ROL is primarily an active process which is affected positively by photosynthesis, and is correlated positively with nutrient removal. Four common wetland plants were studied in small-scale monoculture wetlands. Higher ROL coincided with faster growth among the four monocultures. Significant correlation between ROL and photosynthetic rate existed in Cyperus flabelliformis wetland (P < 0.01). Both ROL and photosynthesis represented close correlations with nutrient removal rates in all four monocultures. Significant differences in ROL, photosynthetic rate, removal rates of NH4+, and soluble reactive phosphorus (SRP) were found among the four species. ROL and photosynthetic rates showed single-peak daily and seasonal patterns, with maximum daily values around noon, and with maximum yearly values in summer or autumn for the four monocultures. The results suggest that the ROL of wetland plants is related to active physiological processes. Both ROL and photosynthetic rate are indices which can be used to identify wetland plants with a higher nutrient removal capacity. |
| |
| Keywords: | Photosynthesis Radial oxygen loss Nutrient removal Root activity Constructed wetland |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
