| Effect of drought on activity of antioxidant enzymes in leaves of Sophora japonica and Amorpha fruticosa seedlings under plumbum stress |
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| DOI：10.7606/j.issn.1000-7601.2016.03.28 |
| Key Words: plumbum stress drought stress Sophora japonica Amorpha fruticosa antioxidant enzymes |
| Author Name | Affiliation | | LI Chun-yan | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
Environmental Protection Agency of Guizhou Provice Anshun City Guanling County, Guanling, Guizhou 561300, China | | WANG Jin-xin | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | WANG Min | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | CHEN Ke-hao | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | WANG Yu-xin | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | SONG Qin-yu | College of Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| This experiment aims to clarify physiological response mechanism of Sophora japonica and Amorpha fruticosa seedlings to drought under plumbum stress, and provide the basis for selecting the plumbum-resistance and drought-resistant varieties in northwestern mining area. Annual Sophora japonica and Amorpha fruticosa seedlings were selected as test materials. A pot experiment was conducted with five soil relative water content (SRW) levels, i.e. 100.00%, 87.84%, 70.00%, 52.16% and 40.00%, and plumbum concentrations (2 000 mg·kg-1), with 100.00% of SRW without plumbum treatment as control. The activities of superoxide dismutase (SOD), catalase (CAT) and peroxides (POD) in leaves of annual Sophora japonica and Amorpha fruticosa seedlings were determined. For the single plumbum stress, Sophora japonica and Amorpha fruticosa seedlings’ antioxidant enzymes activity were significantly higher than those of the control. Under combined stress of drought and plumbum, for the treatments of SRW 87.84%, SRW 70.00%, SRW 52.16%, with the increase in drought stress, the activities of SOD, POD and CAT in leaves of Sophora japonica seedlings initially increased and then decreased, and were higher than those of the control. The same trend was found for Amorpha fruticosa seedlings except for the CAT activity. For the treatment of SRW40%, both activities of SOD and CAT in leaves of Sophora japonica seedlings decreased while the POD activity slightly increased. The activities of SOD, POD and CAT in leaves of Amorpha fruticosa seedlings were higher than those of the control. Plumbum stress (2 000 mg·kg-1) promoted the activities of antioxidant enzymes in leaves of Sophora japonica and Amorpha fruticosa seedlings. The drought resistance of Amorpha fruticosa seedlings was stronger than that of Sophora japonica seedlings under plumbum stress. |
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