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Lead and copper-induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) grown in a contaminated soil.
Sci Total Environ. 2020 Jun 23; 741:140440.ST

Abstract

Lead (Pb) and copper (Cu) contamination seriously threatens agricultural production and food safety. This study aims to investigate Pb and Cu induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) and establish reliable empirical models of potentially toxic elements (PTEs) transfer in the soil-plant system. The content and distribution of Pb and Cu at subcellular levels in lettuce plants were examined using inductively coupled plasma-mass spectrometry, differential centrifugation and micro-X-ray fluorescence spectroscopy. The PTE-loaded capacity of Pb that ensures food safety was lower than that of Cu in the studied soil, but the PTE-loaded capacity of Pb that limits yield was higher than that of Cu. Lead in lettuce roots mainly accumulated in the cell wall (41%), while Cu mainly accumulated in the vacuoles (46%). The Pb and Cu were primarily distributed in the radicle of lettuce seeds under severe PTE stress, resulting in no seed development. Iron plaque formed on the root surface of lettuce seedlings and sequestered Pb and Cu via chelation. At the same concentration, lettuce was less tolerant to Cu in contaminated soil than Pb due to the higher activity of Cu ions in the soil. Lead was more phytotoxic to lettuce than Cu, however, since the radicle emerged from the seed under severe Cu levels, while it did not protrude under severe Pb levels. The potentially damaging effect of Pb in the visually healthy lettuce appeared to be higher than that of Cu under the same soil contamination level.

Authors+Show Affiliations

Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China.College of Oceanology and Food Science, Quanzhou Normal University, Quanzhou, Fujian 362000, China.College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China.College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China.Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China.Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan; School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba, 4350, Queensland, Australia.Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha 6, Suchdol, Czech Republic.School of Water, Energy & Environment, Cranfield University, Cranfield, MK43 0AL, Bedfordshire, United Kingdom.Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, USA.Biochar Engineering Technology Research Center of Guangdong Province, School of Environmental and Chemical Engineering, Foshan University, Foshan, Guangdong 528000, China; Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang A&F University, Hangzhou, Zhejiang 311300, China. Electronic address: hailong.wang@fosu.edu.cn.College of Tropical Crops, Hainan University, Haikou, Hainan 570228, China. Electronic address: wdwu@hainanu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32615435

Citation

Li, Jianhong, et al. "Lead and Copper-induced Hormetic Effect and Toxicity Mechanisms in Lettuce (Lactuca Sativa L.) Grown in a Contaminated Soil." The Science of the Total Environment, vol. 741, 2020, p. 140440.
Li J, Qiu Y, Zhao Q, et al. Lead and copper-induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) grown in a contaminated soil. Sci Total Environ. 2020;741:140440.
Li, J., Qiu, Y., Zhao, Q., Chen, D., Wu, Z., Peng, A. A., Niazi, N. K., Trakal, L., Sakrabani, R., Gao, B., Wang, H., & Wu, W. (2020). Lead and copper-induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) grown in a contaminated soil. The Science of the Total Environment, 741, 140440. https://doi.org/10.1016/j.scitotenv.2020.140440
Li J, et al. Lead and Copper-induced Hormetic Effect and Toxicity Mechanisms in Lettuce (Lactuca Sativa L.) Grown in a Contaminated Soil. Sci Total Environ. 2020 Jun 23;741:140440. PubMed PMID: 32615435.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Lead and copper-induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) grown in a contaminated soil. AU - Li,Jianhong, AU - Qiu,Yong, AU - Zhao,Qingjie, AU - Chen,Dongliang, AU - Wu,Zhipeng, AU - Peng,An-An, AU - Niazi,Nabeel Khan, AU - Trakal,Lukáš, AU - Sakrabani,Ruben, AU - Gao,Bin, AU - Wang,Hailong, AU - Wu,Weidong, Y1 - 2020/06/23/ PY - 2020/04/19/received PY - 2020/06/18/revised PY - 2020/06/20/accepted PY - 2020/7/3/pubmed PY - 2020/7/3/medline PY - 2020/7/3/entrez KW - PTE-loaded capacity KW - Potentially toxic element KW - Safe lettuce production KW - Soil contamination KW - μ-XRF SP - 140440 EP - 140440 JF - The Science of the total environment JO - Sci. Total Environ. VL - 741 N2 - Lead (Pb) and copper (Cu) contamination seriously threatens agricultural production and food safety. This study aims to investigate Pb and Cu induced hormetic effect and toxicity mechanisms in lettuce (Lactuca sativa L.) and establish reliable empirical models of potentially toxic elements (PTEs) transfer in the soil-plant system. The content and distribution of Pb and Cu at subcellular levels in lettuce plants were examined using inductively coupled plasma-mass spectrometry, differential centrifugation and micro-X-ray fluorescence spectroscopy. The PTE-loaded capacity of Pb that ensures food safety was lower than that of Cu in the studied soil, but the PTE-loaded capacity of Pb that limits yield was higher than that of Cu. Lead in lettuce roots mainly accumulated in the cell wall (41%), while Cu mainly accumulated in the vacuoles (46%). The Pb and Cu were primarily distributed in the radicle of lettuce seeds under severe PTE stress, resulting in no seed development. Iron plaque formed on the root surface of lettuce seedlings and sequestered Pb and Cu via chelation. At the same concentration, lettuce was less tolerant to Cu in contaminated soil than Pb due to the higher activity of Cu ions in the soil. Lead was more phytotoxic to lettuce than Cu, however, since the radicle emerged from the seed under severe Cu levels, while it did not protrude under severe Pb levels. The potentially damaging effect of Pb in the visually healthy lettuce appeared to be higher than that of Cu under the same soil contamination level. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/32615435/Lead_and_copper-induced_hormetic_effect_and_toxicity_mechanisms_in_lettuce_(Lactuca_sativa_L.)_grown_in_a_contaminated_soil L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(20)33962-0 DB - PRIME DP - Unbound Medicine ER -
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