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Li S, Zhuo R, Yu M, Lin X, Xu J, Qiu W, Li H, Han X. A novel gene SpCTP3 from the hyperaccumulator Sedum plumbizincicola redistributes cadmium and increases its accumulation in transgenic Populus × canescens. FRONTIERS IN PLANT SCIENCE 2023; 14:1111789. [PMID: 36844053 PMCID: PMC9945123 DOI: 10.3389/fpls.2023.1111789] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
A cadmium (Cd) tolerance protein (SpCTP3) involved in the Sedum plumbizincicola response to Cd stress was identified. However, the mechanism underlying the Cd detoxification and accumulation mediated by SpCTP3 in plants remains unclear. We compared wild-type (WT) and SpCTP3-overexpressing transgenic poplars in terms of Cd accumulation, physiological indices, and the expression profiles of transporter genes following with 100 μmol/L CdCl2. Compared with the WT, significantly more Cd accumulated in the above-ground and below-ground parts of the SpCTP3-overexpressing lines after 100 μmol/L CdCl2 treatment. The Cd flow rate was significantly higher in the transgenic roots than in the WT roots. The overexpression of SpCTP3 resulted in the subcellular redistribution of Cd, with decreased and increased Cd proportions in the cell wall and the soluble fraction, respectively, in the roots and leaves. Additionally, the accumulation of Cd increased the reactive oxygen species (ROS) content. The activities of three antioxidant enzymes (peroxidase, catalase, and superoxide dismutase) increased significantly in response to Cd stress. The observed increase in the titratable acid content in the cytoplasm might lead to the enhanced chelation of Cd. The genes encoding several transporters related to Cd2+ transport and detoxification were expressed at higher levels in the transgenic poplars than in the WT plants. Our results suggest that overexpressing SpCTP3 in transgenic poplar plants promotes Cd accumulation, modulates Cd distribution and ROS homeostasis, and decreases Cd toxicity via organic acids. In conclusion, genetically modifying plants to overexpress SpCTP3 may be a viable strategy for improving the phytoremediation of Cd-polluted soil.
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Affiliation(s)
- Shaocui Li
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
- Forestry Faculty, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Renying Zhuo
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
| | - Miao Yu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
| | - Xiaoyu Lin
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jing Xu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
| | - Wenmin Qiu
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
| | - Haiying Li
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Xiaojiao Han
- State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding of Zhejiang Province, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang, China
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Shen C, Huang YY, Liao Q, Huang BF, Xin JL, Wang L, Fu HL. Characterization of cadmium accumulation mechanism between eggplant ( Solanum melongena L.) cultivars. FRONTIERS IN PLANT SCIENCE 2023; 13:1097998. [PMID: 36699861 PMCID: PMC9868947 DOI: 10.3389/fpls.2022.1097998] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
Excessive cadmium (Cd) accumulation in vegetables due to farmland pollution constitutes a serious threat to human health. Eggplant has a tendency to accumulate Cd. To investigate the mechanism of the differences in Cd accumulation levels between high-Cd (BXGZ) and low-Cd (MYQZ) eggplant cultivar, physiological and biochemical indicators and mRNA expression of eggplant were examined using photosynthetic apparatus, biochemical test kits, Fourier transform infrared (FTIR) spectroscopy and transcriptome sequencing, etc. The results of biochemical test kits and FTIR revealed that MYQZ enhanced pectin methylesterase (PME) activity, and lignin and pectin content in the root cell wall, which was associated with the upregulation of PME, cinnamyl-alcohol dehydrogenase and peroxidase (PODs). Higher levels of cysteine and glutathione (GSH) contents and upregulation of genes associated with sulfur metabolism, as well as higher expression of ATP-binding cassette transporters (ABCs), cation exchangers (CAX) and metal tolerance proteins (MTPs) were observed in MYQZ. In BXGZ, the higher stomatal density and stomatal aperture as well as higher levels of Ca2+ binding protein-1 (PCaP1) and aquaporins and lower levels of A2-type cyclins (CYCA2-1) are consistent with an enhanced transpiration rate in BXGZ. Furthermore, a more developed root system was shown to be associated with higher levels of auxin response factor (ARF19), GATA transcription factors (GATA4, 5 and 11) and auxin efflux carrier component (PIN5) in BXGZ. In conclusion, highly active PME, and higher levels of lignin and pectin in MYQZ are expected to reduce Cd toxicity, while Cd translocation can be inhibited with the help of ABC and other Cd transporters. As for BXGZ, the uptake and translocation of Cd were enhanced by the developed root system and stronger transpiration.
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Li Y, Zhang Y, Luo H, Lv D, Yi Z, Duan M, Deng M. WGCNA Analysis Revealed the Hub Genes Related to Soil Cadmium Stress in Maize Kernel ( Zea mays L.). Genes (Basel) 2022; 13:2130. [PMID: 36421805 PMCID: PMC9690088 DOI: 10.3390/genes13112130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 11/07/2022] [Accepted: 11/13/2022] [Indexed: 01/12/2024] Open
Abstract
Soil contamination by heavy metals has become a prevalent topic due to their widespread release from industry, agriculture, and other human activities. Great progress has been made in elucidating the uptake and translocation of cadmium (Cd) accumulation in rice. However, there is still little known about corresponding progress in maize. In the current study, we performed a comparative RNA-Seq-based approach to identify differentially expressed genes (DEGs) of maize immature kernel related to Cd stress. In total, 55, 92, 22, and 542 DEGs responsive to high cadmium concentration soil were identified between XNY22-CHS-8 vs. XNY22-YA-8, XNY22-CHS-24 vs. XNY22-YA-24, XNY27-CHS-8 vs. XNY27-YA-8, and XNY27-CHS-24 vs. XNY27-YA-24, respectively. The weighted gene co-expression network analysis (WGCNA) categorized the 9599 Cd stress-responsive hub genes into 37 different gene network modules. Combining the hub genes and DEGs, we obtained 71 candidate genes. Gene Ontology (GO) enrichment analysis of genes in the greenyellow module in XNY27-YA-24 and connectivity genes of these 71 candidate hub genes showed that the responses to metal ion, inorganic substance, abiotic stimulus, hydrogen peroxide, oxidative stress, stimulus, and other processes were enrichment. Moreover, five candidate genes that were responsive to Cd stress in maize kernel were detected. These results provided the putative key genes and pathways to response to Cd stress in maize kernel, and a useful dataset for unraveling the underlying mechanism of Cd accumulation in maize kernel.
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Affiliation(s)
- Yongjin Li
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Ying Zhang
- College of Agronomy, Northwest A&F University, Xianyang 712100, China
| | - Hongbing Luo
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
- Maize Engineering Technology Research Center of Hunan Province, Changsha 410128, China
| | - Dan Lv
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Zhenxie Yi
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Meijuan Duan
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Min Deng
- College of Agronomy, Hunan Agricultural University, Changsha 410128, China
- Maize Engineering Technology Research Center of Hunan Province, Changsha 410128, China
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Zou C, Lu T, Wang R, Xu P, Jing Y, Wang R, Xu J, Wan J. Comparative physiological and metabolomic analyses reveal that Fe 3O 4 and ZnO nanoparticles alleviate Cd toxicity in tobacco. J Nanobiotechnology 2022; 20:302. [PMID: 35761340 PMCID: PMC9235244 DOI: 10.1186/s12951-022-01509-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 06/14/2022] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Heavy metals repress tobacco growth and quality, and engineered nanomaterials have been used for sustainable agriculture. However, the underlying mechanism of nanoparticle-mediated cadmium (Cd) toxicity in tobacco remains elusive. RESULTS Herein, we investigated the effects of Fe3O4 and ZnO nanoparticles (NPs) on Cd stress in tobacco cultivar 'Yunyan 87' (Nicotiana tabacum). Cd severely repressed tobacco growth, whereas foliar spraying with Fe3O4 and ZnO NPs promoted plant growth, as indicated by enhancing plant height, root length, shoot and root fresh weight under Cd toxicity. Moreover, Fe3O4 and ZnO NPs increased, including Zn, K and Mn contents, in the roots and/or leaves and facilitated seedling growth under Cd stress. Metabolomics analysis showed that 150 and 76 metabolites were differentially accumulated in roots and leaves under Cd stress, respectively. These metabolites were significantly enriched in the biosynthesis of amino acids, nicotinate and nicotinamide metabolism, arginine and proline metabolism, and flavone and flavonol biosynthesis. Interestingly, Fe3O4 and ZnO NPs restored 50% and 47% in the roots, while they restored 70% and 63% in the leaves to normal levels, thereby facilitating plant growth. Correlation analysis further indicated that these metabolites, including proline, 6-hydroxynicotinic acid, farrerol and quercetin-3-O-sophoroside, were significantly correlated with plant growth. CONCLUSIONS These results collectively indicate that metal nanoparticles can serve as plant growth regulators and provide insights into using them for improving crops in heavy metal-contaminated areas.
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Affiliation(s)
- Congming Zou
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, Yunnan, China
| | - Tianquan Lu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
- Center of Economic Botany, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ruting Wang
- College of Horticulture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China
| | - Peng Xu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
- Center of Economic Botany, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
| | - Yifen Jing
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
- Center of Economic Botany, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
| | - Ruling Wang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
- Center of Economic Botany, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China
| | - Jin Xu
- College of Horticulture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China.
| | - Jinpeng Wan
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China.
- Center of Economic Botany, Chinese Academy of Sciences, Menglun, Mengla, 666303, Yunnan, China.
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Fu Y, Zhatova H, Li Y, Liu Q, Trotsenko V, Li C. Physiological and Transcriptomic Comparison of Two Sunflower ( Helianthus annuus L.) Cultivars With High/Low Cadmium Accumulation. FRONTIERS IN PLANT SCIENCE 2022; 13:854386. [PMID: 35615138 PMCID: PMC9125308 DOI: 10.3389/fpls.2022.854386] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/15/2022] [Indexed: 06/15/2023]
Abstract
The toxic heavy metal cadmium (Cd) is easily absorbed and accumulated in crops and affects human health through the food chains. Sunflower (Helianthus annuus L.) is a globally important oil crop. In this study, two sunflower cultivars 62\3 (high Cd) and JB231AC (low Cd), were chosen to compare physiological and transcriptomic responses at different Cd concentrations (0, 25, 50, and 100 μM). The results showed that JB231AC had better Cd tolerance than 62\3. The contents of H2O2 and MDA (malondialdehyde) in 62\3 were lower than that in JB231AC under Cd stress, but the activities of SOD (superoxide dismutase) and POD (peroxidase) in JB231AC were higher than in 62\3, which indicated that JB231AC had a strong ability to remove reactive oxygen species (ROS)-induced toxic substances. Many deferentially expressed ABC (ATP-binding cassette) and ZIP (Zn-regulated transporter, Iron-regulated transporter-like protein) genes indicated that the two gene families might play important roles in different levels of Cd accumulation in the two cultivars. One up-regulated NRAMP (Natural resistance-associated macrophage protein) gene was identified and had a higher expression level in 62\3. These results provide valuable information to further understand the mechanism of Cd accumulation and provide insights into breeding new low Cd sunflower cultivars.
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Affiliation(s)
- Yuanzhi Fu
- School of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang, China
- Faculty of Agrotechnologies and Natural Resource Management, Sumy National Agrarian University, Sumy, Ukraine
| | - Halyna Zhatova
- Faculty of Agrotechnologies and Natural Resource Management, Sumy National Agrarian University, Sumy, Ukraine
| | - Yuqing Li
- School of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang, China
| | - Qiao Liu
- School of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang, China
| | - Volodymyr Trotsenko
- Faculty of Agrotechnologies and Natural Resource Management, Sumy National Agrarian University, Sumy, Ukraine
| | - Chengqi Li
- Life Science College, Yuncheng University, Yuncheng, China
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Unraveling Cadmium Toxicity in Trifolium repens L. Seedling: Insight into Regulatory Mechanisms Using Comparative Transcriptomics Combined with Physiological Analyses. Int J Mol Sci 2022; 23:ijms23094612. [PMID: 35563002 PMCID: PMC9105629 DOI: 10.3390/ijms23094612] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 01/27/2023] Open
Abstract
Trifolium repens (T. repens) can accumulate significant amounts of heavy metal ions, and has strong adaptability to wide environmental conditions, and relatively large biomass, which is considered a potential plant for phytoremediation. However, the molecular mechanisms of T. repens involved in Cd tolerance have not yet been studied in detail. This study was conducted to examine the integrative responses of T. repens exposed to a high-level CdCl2 by investigating the physiological and transcriptomic analyses. The results suggested that T. repens seedlings had a high degree of tolerance to Cd treatment. The roots accumulated higher Cd concentration than leaves and were mainly distributed in the cell wall. The content of MDA, soluble protein, the relative electrolyte leakage, and three antioxidant enzymes (POD, SOD, and APX) was increased with the Cd treatment time increasing, but the CAT enzymes contents were decreased in roots. Furthermore, the transcriptome analysis demonstrated that the differentially expressed genes (DEGs) mainly enriched in the glutathione (GSH) metabolism pathway and the phenylpropanoid biosynthesis in the roots. Overexpressed genes in the lignin biosynthesis in the roots might improve Cd accumulation in cell walls. Moreover, the DEGs were also enriched in photosynthesis in the leaves, transferase activity, oxidoreductase activity, and ABA signal transduction, which might also play roles in reducing Cd toxicity in the plants. All the above, clearly suggest that T. repens employ several different mechanisms to protect itself against Cd stress, while the cell wall biosynthesis and GSH metabolism could be considered the most important specific mechanisms for Cd retention in the roots of T. repens.
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Ma Y, Liu K, Zhang C, Lin F, Hu W, Jiang Y, Tao X, Han Y, Han L, Liu C. Comparative root transcriptome analysis of two soybean cultivars with different cadmium sensitivities reveals the underlying tolerance mechanisms. Genome 2021; 65:1-16. [PMID: 34648728 DOI: 10.1139/gen-2021-0048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Soybean can provide rich protein and fat and has great economic value worldwide. Cadmium (Cd) is a toxic heavy metal to organisms. It can accumulate in plants and be transmitted to the human body via the food chain. Cd is a serious threat to soybean development, particularly root growth. Some soybean cultivars present tolerant symptoms under Cd stress; however, the potential mechanisms are not fully understood. Here, we optimized RNA-seq to identify the differentially expressed genes (DEGs) in Cd-sensitive (KUAI) and Cd-tolerant (KAIYU) soybean roots and compared the DEGs between KAIYU and KUAI. A total of 1506 and 1870 DEGs were identified in the roots of KUAI and KAIYU, respectively. Through Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway, and gene function analyses, we found that genes related to antioxidants and sequestration were responsible for Cd tolerance in KAIYU. In addition, overexpression of Glyma11g02661, which encodes a heavy metal-transporting ATPase, significantly improved Cd tolerance in transgenic hairy roots. These results provide a preliminary understanding of the tolerance mechanisms in response to Cd stress in soybean root development and are of great importance in developing Cd-resistant soybean cultivars by using the identified DEGs through genetic modification.
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Affiliation(s)
- Yuan Ma
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Kuichen Liu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Chunyu Zhang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Feng Lin
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Wenbo Hu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Yue Jiang
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Xianliang Tao
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Yulin Han
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Litao Han
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
| | - Chen Liu
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, Liaoning, China
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