Increased antioxidative enzyme activity mediates the phytoaccumulation potential of Pb in four agroforestry tree species: a case study under municipal and industrial wastewater irrigation
| Autor: | Pertti Pulkkinen, Muhammad Rafay, Fahad Rasheed, Muhammad Ayyoub Tanvir, Charles M. Ruffner, Zafar Hussain, Muhammad Mohsin, Zikria Zafar |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Irrigation Agroforestry Greenhouse Plant Science Hydrogen Peroxide 010501 environmental sciences Wastewater Antioxidative enzyme 01 natural sciences Pollution Irrigation water Antioxidants Trees Industrial wastewater treatment Biodegradation Environmental Lead Environmental Chemistry Environmental science Soil Pollutants Tree species Ecosystem 010606 plant biology & botany 0105 earth and related environmental sciences |
| Zdroj: | International journal of phytoremediation. 23(7) |
| ISSN: | 1549-7879 |
| Popis: | Wastewater used as irrigation water is causing heavy metal accumulation in the agro-ecosystems. A greenhouse study was conducted to compare the phytoaccumulation ability of four agroforestry tree species under different wastewater treatments. Three-month-old potted seedlings of Morus alba, Acacia nilotica, Acacia ampliceps, and Azadirachta indica were irrigation with tap water (C), municipal wastewater (MWW), and industrial wastewater (IWW). Results showed that MWW had a positive and IWW had a negative impact on biomass production in all the species. Acacia ampliceps showed the highest increment (65%) and showed the lowest decrease (5%) in total biomass under both MWW and IWW treatment. Pb concentration was also found highest in the leaves, stem and roots of Azadirachta indica (108.5, 46.2, 180.5 mg kg−1, respectively) under IWW. Production of H2O2 was highest in IWW treatment with almost 148% increase observed in Azadirachta indica. Similarly, the production of antioxidative enzymes (Superoxide dismutase, Catalase and Peroxidase) was also highest in Azadirachta indica under IWW. Therefore, results suggest that along with high increment in total biomass, both Acacia ampliceps and Azadirachta indica showed high Pb concentration and an effective antioxidative defense mechanism and thus, can be used for planting in soils irrigated with MWW and IWW. |
| Databáze: | OpenAIRE |
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