Metal uptake by medicinal plant species grown in soils contaminated by a smelter |
| |
| Institution: | 1. Mississippi State University, Department of Plant and Soil Sciences and North Mississippi Research and Extension Center, 5421 Highway 145 South, Verona, MS 38879, USA;2. Research Institute for Roses, Aromatic and Medicinal Crops, Kazanluk, Bulgaria;1. Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Ibrahimia, Alexandria 21321, Egypt;2. Eduard-Zintl-Institute of Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenstrasse 20, 64287 Darmstadt, Germany;1. Department of Drug Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy;2. Department of Neuroscience, Karolinska Institutet, Retzius väg 8, SE-171 77 Stockholm, Sweden;1. CNR-SPIN, Viale del Politecnico 1, I-00133, Rome, Italy;2. Russian Quantum Center, 143025, Skolkovo, Moscow region, Russia;3. Spin Optics Laboratory, St-Petersburg State University, 1, Ulianovskaya, 198504, St-Petersburg, Russia;4. Physics and Astronomy, University of Southampton, Highfield, Southampton, SO171BJ, United Kingdom;5. A.G and N.G. Stoletov Vladimir State University (VSU), 87 Gorki St., Vladimir, 600000, Russia;6. Mediterranean Institute of Fundamental Physics, 31, Appia Nuova, 00031, Rome, Italy;7. University of Science and Technology of Hanoi, Vietnam Academy of Science, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Viet Nam;8. Nano and Energy Center, VNU University of Science, 334 Nguyen Trai Street, Thanh Xuan, Hanoi, Viet Nam;1. College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China;2. Laboratory of Environmental Sciences and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences, Urumqi 830011, China;1. Key Laboratory of Chinese Medicine Resources Conservation, State Administration of Traditional Chinese Medicine of the People’s Republic of China, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China;2. Chengdu University of Traditional Chinese Medicine Key Laboratory of Systematic Research of Distinctive Chinese Medicine Resources in Southwest China, College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China;3. College of Pharmacy, Guilin Medical University, Guilin 541100, China;4. Jiangxi University of Traditional Chinese Medicine, Jiangxi 330000, Nanchang, China |
| |
| Abstract: | The hypothesis tested in this study was if medicinal plants could be grown as alternative crops in heavy metal polluted soils without contamination of the final marketable produce. Furthermore, medicinal crops may offer a phytoremediation option for mildly heavy metal polluted agricultural soils. The effect of metal-enriched soils was evaluated in five medicinal species (Bidens tripartita L., Leonurus cardiaca L., Marrubium vulgare L., Melissa officinalis L. and Origanum heracleoticum L.). Soils were sampled in the vicinities of the Non-Ferrous Metals Combine (Pb–Zn smelter) near Plovdiv, Bulgaria, from plots at 0.5 km (soil 1), 3 km (soil 2), 6 km (soil 3) and 9 km (control soil) from the smelter. Cadmium, Pb and Zn concentration in soil 1 were above the critical total (HNO3-extractable) concentrations for these elements in soils. Generally, heavy metals in soil 1 decreased dry mater yields of the five species relative to the control. However, the essential oil content of M. vulgare, M. officinalis and O. heracleoticum was within the usual range for respective species and was not affected by the treatments. The overall metal uptake was in the order: B. tripartita > M. vulgare > O. heracleoticum > L. cardiaca > M. officinalis for Cd, L. cardiaca = M. vulgare > B. tripartita = M. officinalis = O. heracleoticum for Pb, L. cardiaca = M. vulgare > O. heracleoticum > B. tripartita = M. officinalis for Cu and B. tripartita > L. cardiaca = M. vulgare > M. officinalis = O. heracleoticum for Mn and Zn. Overall, metal concentration in plant parts was in the order: roots > leaves > flowers > stems for Cd, Pb and Cu, leaves > roots > flowers > stems for Mn and Zn. The concentration of Cd, Pb, Cu and Zn in plant tissue correlated to the exchangeable (EXCH) and the carbonate (CARB) bound fractions of metals in soil. Heavy metals caused disruptions of the plasma membrane of some root cortical cells and alterations in chloroplasts thylakoids in plants grown in soil 1. Metal content in teas prepared from the species was negligible, the essential oils were free of metals. Generally, the transfer factor (TF) was less than 1, indicating the tested species did not have a significant phytoextraction potential. This study demonstrated the three essential oil species M. vulgare, M. officinalis and O. heracleoticum can be grown as alternative high-value crops in metal polluted agricultural soils around the smelter and provide metal-free marketable produce. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
