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Moy A, Nkongolo K. Decrypting Molecular Mechanisms Involved in Counteracting Copper and Nickel Toxicity in Jack Pine ( Pinus banksiana) Based on Transcriptomic Analysis. PLANTS (BASEL, SWITZERLAND) 2024; 13:1042. [PMID: 38611570 PMCID: PMC11013723 DOI: 10.3390/plants13071042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024]
Abstract
The remediation of copper and nickel-afflicted sites is challenged by the different physiological effects imposed by each metal on a given plant system. Pinus banksiana is resilient against copper and nickel, providing an opportunity to build a valuable resource to investigate the responding gene expression toward each metal. The objectives of this study were to (1) extend the analysis of the Pinus banksiana transcriptome exposed to nickel and copper, (2) assess the differential gene expression in nickel-resistant compared to copper-resistant genotypes, and (3) identify mechanisms specific to each metal. The Illumina platform was used to sequence RNA that was extracted from seedlings treated with each of the metals. There were 449 differentially expressed genes (DEGs) between copper-resistant genotypes (RGs) and nickel-resistant genotypes (RGs) at a high stringency cut-off, indicating a distinct pattern of gene expression toward each metal. For biological processes, 19.8% of DEGs were associated with the DNA metabolic process, followed by the response to stress (13.15%) and the response to chemicals (8.59%). For metabolic function, 27.9% of DEGs were associated with nuclease activity, followed by nucleotide binding (27.64%) and kinase activity (10.16%). Overall, 21.49% of DEGs were localized to the plasma membrane, followed by the cytosol (16.26%) and chloroplast (12.43%). Annotation of the top upregulated genes in copper RG compared to nickel RG identified genes and mechanisms that were specific to copper and not to nickel. NtPDR, AtHIPP10, and YSL1 were identified as genes associated with copper resistance. Various genes related to cell wall metabolism were identified, and they included genes encoding for HCT, CslE6, MPG, and polygalacturonase. Annotation of the top downregulated genes in copper RG compared to nickel RG revealed genes and mechanisms that were specific to nickel and not copper. Various regulatory and signaling-related genes associated with the stress response were identified. They included UGT, TIFY, ACC, dirigent protein, peroxidase, and glyoxyalase I. Additional research is needed to determine the specific functions of signaling and stress response mechanisms in nickel-resistant plants.
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Affiliation(s)
| | - Kabwe Nkongolo
- Biomolecular Sciences Program, Department of Biology, School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;
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Li Z, Cao Z, Ma X, Cao D, Zhao K, Zhao K, Ma Q, Gong F, Li Z, Qiu D, Zhang X, Liu H, Ren R, Yin D. Natural resistance-associated macrophage proteins are involved in tolerance to heavy metal Cd 2+ toxicity and resistance to bacterial wilt of peanut (Arachis hypogaea L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108411. [PMID: 38309181 DOI: 10.1016/j.plaphy.2024.108411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/15/2024] [Accepted: 01/30/2024] [Indexed: 02/05/2024]
Abstract
Peanut (Arachis hypogaea L.) is one of the most important oil and industrial crops. However, heavy-metal pollution and frequent soil diseases, poses a significant threat to the production of green and healthy peanuts. Herein, we investigated the effects of heavy metal Cd2+ toxicity to the peanuts, and screened out two peanut cultivars H108 and YZ 9102 with higher Cd2+-tolerance. RNA-seq revealed that Natural resistance-associated macrophage proteins (NRAMP)-like genes were involved in the Cd2+ stress tolerance in H108. Genome-wide identification revealed that 28, 13 and 9 Nramp-like genes existing in the A. hypogaea, A. duranensis and A. ipaensis, respectively. The 50 peanut NRAMP genes share conserved architectural characters, and they were classified into two groups. Expressions of AhNramps, particularly AhNramp4, AhNramp12, AhNramp19, and AhNramp25 could be greatly induced by not only cadmium toxicity, but also copper and zinc stresses. The expression profiles of AhNramp14, AhNramp16 and AhNramp25 showed significant differences in the H108 (resistance) and H107 (susceptible) under the infection of bacterial wilt. In addition, we found that the expression profiles of AhNramp14, AhNramp16, and AhNramp25 were greatly up- or down-regulated by the application of exogenous salicylic acid, methyl jasmonate, and abscisic acid. The AhNramp25, of which expression was affected by both heavy metal toxicity and bacterial wilt infection, were selected as strong candidate genes for peanut stress breeding. Our findings will provide an additional information required for further analysis of AhNramps involved in tolerance to heavy metal toxicity and resistance to bacterial wilt of peanut.
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Affiliation(s)
- Zhan Li
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Zenghui Cao
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Xingli Ma
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Di Cao
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Kunkun Zhao
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Kai Zhao
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Qian Ma
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Fangping Gong
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Zhongfeng Li
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Ding Qiu
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Xingguo Zhang
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Haitao Liu
- College of Resources and Environment, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Rui Ren
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China.
| | - Dongmei Yin
- College of Agronomy & Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, Henan, China.
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Zhang J, Zhang X, Jia M, Fu Q, Guo Y, Wang Z, Kong D, Lin Y, Zhao D. Two novel transporters NtNRAMP6a and NtNRAMP6b are involved in cadmium transport in tobacco (Nicotiana tabacum L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 202:107953. [PMID: 37572492 DOI: 10.1016/j.plaphy.2023.107953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/15/2023] [Accepted: 08/06/2023] [Indexed: 08/14/2023]
Abstract
Plant natural resistance-associated macrophage protein (NRAMP) plays important roles in metal transport and tolerance. Tobacco is a typical cadmium (Cd) accumulator, while research on NRAMP in tobacco has been limited. In the current study, two novel NRAMP genes (NtNRAMP6a and NtNRAMP6b) were identified from the allotetraploid plant Nicotiana tabacum L. Real time‒PCR and GUS (β-glucuronidase) staining results showed that the two genes were expressed in roots, stems, leaves and flowers and induced by Cd stress. Subcellular localization revealed that they were located in the plasma membrane. Heterologously expressed NtNRAMP6a and NtNRAMP6b significantly increased the Cd sensitivity of the Δycf1 mutant, indicating that NtNRAMP6a and NtNRAMP6b had Cd transport functions in yeast. The difference in the manganese (Mn) transport activity of the two genes was demonstrated by point mutation, which was caused by the difference in the 18th amino acid. NRAMP6-N18K is a new key active site for manganese transport. After 50 μM Cd treatment for 7 days, the contents of Cd and Mn of the ntnramp6a/6b mutants was significantly lower than those of wild type in shoots, while the contents in roots were higher. Additionally, the mutant lines showed higher chorphyll contentration and lighter leaf damage. Knockout of NtNRAMP6a and NtNRAMP6b reduced Cd and Mn accumulation in tobacco shoots by influence root-to-shoot translocation. This provides new idea for cultivating tobacco varieties with low cadmium accumulation and high cadmium tolerance.
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Affiliation(s)
- Jishun Zhang
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou Key Laboratory of Agro-Bioengineering, Institute of Agro-Bioengineering / College of Life Sciences, Guizhou University, Guiyang 550025, China; Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Xiaolian Zhang
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Mengao Jia
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Qiang Fu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Yushuang Guo
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Zhihong Wang
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Dejun Kong
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Yingchao Lin
- Molecular Genetics Key Laboratory of China Tobacco, Guizhou Academy of Tobacco Science, Guiyang 550081, China
| | - Degang Zhao
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Guizhou Key Laboratory of Agro-Bioengineering, Institute of Agro-Bioengineering / College of Life Sciences, Guizhou University, Guiyang 550025, China; Guizhou Plant Conservation Technology Center, Guizhou Key Laboratory of Agricultural Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006, China.
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Li RT, Yang YJ, Liu WJ, Liang WW, Zhang M, Dong SC, Shu YJ, Guo DL, Guo CH, Bi YD. MsNRAMP2 Enhances Tolerance to Iron Excess Stress in Nicotiana tabacum and MsMYB Binds to Its Promoter. Int J Mol Sci 2023; 24:11278. [PMID: 37511038 PMCID: PMC10379929 DOI: 10.3390/ijms241411278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023] Open
Abstract
Iron(Fe) is a trace metal element necessary for plant growth, but excess iron is harmful to plants. Natural resistance-associated macrophage proteins (NRAMPs) are important for divalent metal transport in plants. In this study, we isolated the MsNRAMP2 (MN_547960) gene from alfalfa, the perennial legume forage. The expression of MsNRAMP2 is specifically induced by iron excess. Overexpression of MsNRAMP2 conferred transgenic tobacco tolerance to iron excess, while it conferred yeast sensitivity to excess iron. Together with the MsNRAMP2 gene, MsMYB (MN_547959) expression is induced by excess iron. Y1H indicated that the MsMYB protein could bind to the "CTGTTG" cis element of the MsNRAMP2 promoter. The results indicated that MsNRAMP2 has a function in iron transport and its expression might be regulated by MsMYB. The excess iron tolerance ability enhancement of MsNRAMP2 may be involved in iron transport, sequestration, or redistribution.
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Affiliation(s)
- Run-Tian Li
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Yun-Jiao Yang
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Wen-Jun Liu
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Wen-Wei Liang
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
- Institute of Crops Tillage and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Miao Zhang
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Shi-Chen Dong
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Yong-Jun Shu
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Dong-Lin Guo
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Chang-Hong Guo
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Ying-Dong Bi
- Institute of Crops Tillage and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
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Liu Z, Wu X, Hou L, Ji S, Zhang Y, Fan W, Li T, Zhang L, Liu P, Yang L. Effects of cadmium on transcription, physiology, and ultrastructure of two tobacco cultivars. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 869:161751. [PMID: 36690104 DOI: 10.1016/j.scitotenv.2023.161751] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 01/11/2023] [Accepted: 01/17/2023] [Indexed: 06/17/2023]
Abstract
Cadmium (Cd) is one of the most toxic heavy metal pollutants worldwide. Tobacco is an important cash crop; however, the accumulation of Cd in its biomass is very high. Cadmium may enter the body of smokers with contaminated tobacco and the surrounding environment via smoke. Therefore, it is important to understand the mechanisms of Cd accumulation and tolerance in tobacco plants, especially in the leaves. In this study, the effects of Cd on the growth, accumulation, and biochemical indices of two tobacco varieties, K326 (Cd resistant) and NC55 (Cd sensitive), were studied through transcriptomic and physiological experiments. Transcriptome and physiological analyses showed differences in the expression of Cd transport and Cd resistance related genes between NC55 and K326 under Cd stress. The root meristem cells of NC55 were more severely damaged. The antioxidant enzyme activity, ABA and ZT content, chlorophyll content, photosynthetic rate, and nitrogen metabolism enzyme activity in K326 leaves were higher than in NC55. These data elucidate the mechanisms of low Cd accumulation and high Cd tolerance in K326 leaves and provide a theoretical basis for cultivating tobacco varieties with low Cd accumulation and high Cd resistance.
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Affiliation(s)
- Zhiguo Liu
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Xiuzhe Wu
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Lei Hou
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Shengzhe Ji
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Yao Zhang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Weiru Fan
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Tong Li
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Li Zhang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China
| | - Peng Liu
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China.
| | - Long Yang
- College of Plant Protection, Shandong Agricultural University, Tai'an 271000, China.
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Kozak K, Antosiewicz DM. Tobacco as an efficient metal accumulator. Biometals 2023; 36:351-370. [PMID: 36097238 PMCID: PMC10082116 DOI: 10.1007/s10534-022-00431-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 07/29/2022] [Indexed: 11/26/2022]
Abstract
Tobacco (Nicotiana tabacum L.) is an important industrial crop plant. However, it efficiently accumulates metals, primarily cadmium (Cd) and also zinc (Zn), in its leaves. Therefore, it could be a source of cadmium intake by smokers. On the other hand, as a high leaf metal accumulator, it is widely used for phytoremediation of metal-contaminated soil. Both issues provide an important rationale for investigating the processes regulating metal homeostasis in tobacco. This work summarizes the results of research to date on the understanding of the molecular mechanisms determining the effective uptake of Zn and Cd, their translocation into shoots and accumulation in leaves. It also discusses the current state of research to improve the phytoremediation properties of tobacco through genetic modification and to limit leaf Cd content for the tobacco industry.
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Affiliation(s)
- Katarzyna Kozak
- Department of Plant Metal Homeostasis, Faculty of Biology, Institute of Experimental Plant Biology and Biotechnology, University of Warsaw, 1 Miecznikowa Str, 02-096, Warszawa, Poland
| | - Danuta Maria Antosiewicz
- Department of Plant Metal Homeostasis, Faculty of Biology, Institute of Experimental Plant Biology and Biotechnology, University of Warsaw, 1 Miecznikowa Str, 02-096, Warszawa, Poland.
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