School of Environmental Sciences, Mahatma Gandhi University, Kottayam, Kerala, India.
Advanced Centre of Environmental Studies and Sustainable Development (ACESSD), Mahatma Gandhi University, Kottayam, Kerala, India.
Int J Phytoremediation. 2022;24(11):1120-1132. doi: 10.1080/15226514.2021.2007215. Epub 2021 Nov 30.
The role of multi-heavy metal tolerant bacteria isolated from the rhizosphere of in the phytoremediation of Cu and Pb under laboratory conditions was investigated. The heavy metal tolerant rhizosphere bacteria were identified as , , , , and Results showed a significant variation in wet weight, Heterotrophic Plate Count (HPC) of the rhizosphere, HPC of water, removal and uptake of Cu and Pb by , either alone or in association with the rhizosphere bacteria. The removal of Cu by in different experimental conditions showed that OTC (Oxytetracycline) untreated with rhizosphere bacteria has maximum removal with 95%, followed by alone with 84%. The OTC treated with rhizosphere bacteria could remove 81% of Cu. The maximum Pb removal efficiency of 93.4% was shown by OTC untreated with rhizosphere bacteria, followed by alone with 86.8%. The OTC treated with rhizosphere bacteria showed the least removal efficiency with 82.32%. The translocation factor (TF) values for Cu and Pb were lower than 1 indicated that the absorption was mainly accomplished in the roots of . The order of accumulation of Cu and Pb in was noted as root > leaf > petiole.
从根际分离出的耐多种重金属细菌在实验室条件下对 Cu 和 Pb 的植物修复中的作用。耐重金属根际细菌被鉴定为 、 、 、 、 。结果表明，单独或与根际细菌一起，根际湿重、异养平板计数（HPC）、水的 HPC、Cu 和 Pb 的去除和吸收均有显著变化。不同实验条件下 Cu 的去除表明，未用 OTC（土霉素）处理的根际细菌与 一起具有最大去除率 95%，其次是 单独去除 84%。用 OTC 处理的根际细菌可去除 81%的 Cu。最大 Pb 去除效率为 93.4%，由未用 OTC 处理的根际细菌与 一起显示，其次是单独的 86.8%。用 OTC 处理的根际细菌与 一起表现出最低的去除效率，为 82.32%。Cu 和 Pb 的迁移因子（TF）值均低于 1，表明吸收主要发生在 的根部。Cu 和 Pb 在 中的积累顺序为根 > 叶 > 叶柄。
