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Hu X, Wang S, Zhang H, Zhang H, Feng S, Qiao K, Lv F, Gong S, Zhou A. Plant cadmium resistance 6 from Salix linearistipularis (SlPCR6) affects cadmium and copper uptake in roots of transgenic Populus. Ecotoxicol Environ Saf 2022; 245:114116. [PMID: 36174317 DOI: 10.1016/j.ecoenv.2022.114116] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 09/17/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Phytoextraction in phytoremediation is one of the environmentally friendly methods used for restoring soils contaminated by heavy metals (HMs). The screening and identification of HM-resistant plants and their regulatory genes associated with HM ion transport are the key research aims in this field. In this study, a plant cadmium (Cd) resistance (PCR) gene family member, SlPCR6, was identified in roots of Salix linearistipularis, which exhibits strong HM resistance. The results revealed that SlPCR6 expression was induced in S. linearistipularis roots in response to Cd stress. Furthermore, SlPCR6 was mainly localized on the plasma membrane. Compared with the wild type, SlPCR6 overexpression reduced the Cd and copper (Cu) contents in the transgenic poplar (84 K) and increased its Cd and Cu resistance. The roots of transgenic poplar seedlings had lower net Cd and Cu uptake rates than wild type roots. Further investigation revealed that the transcript levels of multiple HM ion transporters were not significantly different between the roots of the wild type and those of the transgenic poplar. These results suggest that SlPCR6 is directly involved in Cd and Cu transport in S. linearistipularis roots. Therefore, SlPCR6 can serve as a candidate gene to improve the phytoextraction of the HMs Cd and Cu through genetic engineering.
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Affiliation(s)
- Xuefei Hu
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Shunan Wang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Huaifang Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Haizhen Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Shuang Feng
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Kun Qiao
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Fuling Lv
- Chinese Academy of Forestry, Beijing 100091, China
| | - Shufang Gong
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Aimin Zhou
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
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Wang J, Yi X, Cui J, Chang Y, Yao D, Zhou D, Yang J, Zhou J, Chan A, Wang W, Yin X. Nonlinear effects of increasing nitrogen deposition on rice growth and heavy metal uptake in a red soil ecosystem of southeastern China. Sci Total Environ 2019; 670:1060-1067. [PMID: 31018421 DOI: 10.1016/j.scitotenv.2019.03.245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 02/26/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
With the population growth, urbanization and industrialization, China has become a hotspot of atmospheric deposition nitrogen (ADN), which is a threat to ecosystem and food safety. However, the impacts of increased ADN on rice growth and grain metal content are little studied. Based on previous long-term ADN studies, greenhouse experiment was conducted with four simulated ADN rates of 0, 30, 60 and 90 kg N ha-1 yr-1 (CK, N1, N2 and N3 as δ15N, respectively) to assess rice growth and metal uptake in a red soil ecosystem of southeast China during 2016-2017. Results showed that simulated ADN could promote rice growth and increase yields by 15.68-24.41% (except N2) and accumulations of cadmium (Cd) or copper (Cu) in organs. However, there was no linear relationship between ADN rate and rice growth or Cd or Cu uptake. The 15N-ADN was mainly accumulated in roots (21.31-67.86%) and grains (25.26-49.35%), while Cd and Cu were primarily accumulated in roots (78.86-93.44% and 90.00-96.24%, respectively). 15N-ADN and Cd accumulations in roots were significantly different between the two growing seasons (p < 0.05), implying the accumulative effects of ADN. Data also indicated the synergetic effect between accumulations of 15N-ADN and soil Cd and Cu. This study demonstrated that increasing ADN could potentially enhance Cd or Cu uptake in rice grain and threaten rice grain safety. However, related nonlinear mechanism is still needed to be discussed between increasing ADN and rice response in the future.
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Affiliation(s)
- Jingjing Wang
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China; Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Xiu Yi
- School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China
| | - Jian Cui
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China; Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China.
| | - Yajun Chang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Dongrui Yao
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - John Yang
- Department of Agriculture and Environmental Science, Lincoln University of Missouri, Jefferson City, MO 65201, USA
| | - Jing Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China.
| | - Andy Chan
- Faculty of Engineering, University of Nottingham Malaysia, Semenyih 43500, Malaysia
| | - Wei Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden, Mem. Sun Yat-Sen, Nanjing 210014, PR China
| | - Xijie Yin
- Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, PR China
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