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Yan K, Ablimit M, Liu S, Liu Z, Wang Y. A novel metallothionein gene HcMT from halophyte shrub Halostachys caspica respond to cadmium and sodium stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 201:107763. [PMID: 37301187 DOI: 10.1016/j.plaphy.2023.107763] [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: 02/17/2023] [Revised: 04/23/2023] [Accepted: 05/12/2023] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) and sodium (Na) are two of the most phytotoxic metallic elements causing environmental and agricultural problems. Metallothioneins (MTs) play an important role in the adaptation to abiotic stress. We previously isolated a novel type 2 MT gene from Halostachys caspica (H. caspica), named HcMT, which responded to metal and salt stress. To understand the regulatory mechanisms controlling HcMT expression, we cloned the HcMT promoter and characterized its tissue-specific and spatiotemporal expression patterns. β-Glucuronidase (GUS) activity analysis showed that the HcMT promoter was responsive to CdCl2, CuSO4, ZnSO4 and NaCl stress. Therefore, we further investigated the function of HcMT under abiotic stress in yeast and Arabidopsis thaliana (Arabidopsis). In CdCl2, CuSO4 or ZnSO4 stress, HcMT significantly enhanced the metal ions tolerance and accumulation in yeast through function as a metal chelator. Moreover, the HcMT protein also protected yeast cells from NaCl, PEG and hydrogen peroxide (H2O2) toxicity with less effectiveness. However, transgenic Arabidopsis carrying HcMT gene only displayed tolerance to CdCl2 and NaCl, accompanying by higher content of Cd2+ or Na+ and lower H2O2, compared to wild-type (WT) plants. Next, we demonstrated that the recombinant HcMT protein has the ability to bind Cd2+ and the potential of scavenging ROS (reactive oxygen species) in vitro. This result further confirmed that the role of HcMT to influence plants to CdCl2 and NaCl stress may bind metal ions and scavenge ROS. Overall, we described the biological functions of HcMT and developed a metal- and salt-inducible promoter system for using in genetic engineering.
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Affiliation(s)
- Kexin Yan
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830017, China.
| | - Mehriban Ablimit
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830017, China.
| | - Sai Liu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830017, China.
| | - Zhongyuan Liu
- School of Chemical Engineering, Sichuan University of Science and Engineering, Sichuan, 643000, China.
| | - Yan Wang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, 830017, China.
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So K, Pak U, Sun S, Wang Y, Yan H, Zhang Y. Transcriptome profiling revealed salt stress-responsive genes in Lilium pumilum bulbs. FRONTIERS IN PLANT SCIENCE 2022; 13:1054064. [PMID: 36438143 PMCID: PMC9698130 DOI: 10.3389/fpls.2022.1054064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Lilium pumilum is an important ornamental, culinary and medicinal bulbous plants with salt tolerance. However, salt tolerance of lily, particularly the bulb, has been studied relatively little, which brings challenges to the cultivation of lily varieties with high salt tolerance. Here, we performed transcriptome sequencing on the bulb organs of L. pumilum under salt stress treatment, analyzed differential gene expressed levels and then identified several key genes associated with salt stress tolerance at genome-wide scale. For the first time, we revealed the obvious response against salt stress for L. pumilum bulb organs, while distinct from those for root organs. Several key genes obtained through transcriptome analysis and DEG screening include NF-YB3 transcription factor, metallothionein type 2 protein, vicilin like seed storage protein and bidirectional sugar transporter SWEET14. Rather than typical ROS scavengers like superoxide dismutase, peroxidase, and glutathione transferase, non-typical ROS scavengers such as the metallothionein type 2 protein, and vicilin like seed storage protein were upregulated in our work. The bidirectional sugar transporter SWEET14 protein and the hormone signaling proteins such as E3-ubiquitin protein ligases, PYL4 and protein phosphatase 2C were also upregulated, suggesting the role of sugars and hormones in the bulb organ responses to salt stress. Co-expression analysis of the DEGs further confirmed that NF-YB3 transcription factor acted as a hub gene, suggesting that salt stress can promote flowering of L. pumilum. Taken together, we identified important candidate genes associated with salt tolerance of the L. pumilum bulb organs, which may provide the excellent basis for further in-depth salt tolerance mechanisms of the lily bulbs.
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Affiliation(s)
- Kyongsok So
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
- Laboratory for Landscape Architecture, Institute of Architectural Material, State Academy of Sciences, Pyongyang, Democratic People’s Republic of Korea
| | - Unil Pak
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
- Department of Biotechnology, Faculty of Life Science, Pyongyang University of Science and Technology, Pyongyang, Democratic People’s Republic of Korea
| | - Shaoying Sun
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
| | - Yiping Wang
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
| | - Hao Yan
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
| | - Yanni Zhang
- College of Landscape Architecture, Northeast Forestry University, Harbin, China
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Pan Y, Tian L, Zhao Q, Tao Z, Yang J, Zhou Y, Cao R, Zhang G, Wu W. Evaluation of the acute toxic effects of crude oil on intertidal mudskipper (Boleophthalmus pectinirostris) based on antioxidant enzyme activity and the integrated biomarker response. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 292:118341. [PMID: 34637832 DOI: 10.1016/j.envpol.2021.118341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 09/17/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
With the development of marine oil industry, oil spill accidents will inevitably occur, further polluting the intertidal zone and causing biological poisoning. The muddy intertidal zone and Boleophthalmus pectinirostris were selected as the research objects to conduct indoor acute exposure experiments within 48 h of crude oil pollution. Statistical analysis was used to reveal the activity changes of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione S-transferase (GST) in the gills and liver of mudskipper. Then, integrated biomarker response (IBR) indicators were established to comprehensively evaluate the biological toxicity. The results showed that the activities of SOD, CAT and GST in livers were higher than those in gills, and the maximum induction multipliers of SOD, CAT and GPx in livers appeared earlier than those in gills. Both SOD and GPx activities were induced at low pollutant concentrations and inhibited at high pollutant concentrations. For the dose-effect, the change trends of CAT and SOD were roughly inversed. There was substrate competition between GPx and CAT, with opposite trends over time. The activating mechanism of GST was similar to that of GPx, and the activation time was earlier than that of GPx. In terms of dose-effect trends, the IBR showed that the antioxidant enzymes activities in biological tissues were induced by low and inhibited by high pollutant concentrations. Overall, SOD and GPx in gills and CAT and GST in livers of the mudskippers were suitable as representative markers to comprehensively analyze and evaluate the biotoxicity effects of oil pollution in the intertidal zone. The star plots and IBR values obtained after data standardization were consistent with the enzyme activity differences, which can be used as valid supplementary indexes for biotoxicity evaluation. These research findings provide theoretical support for early indicators of biological toxicity after crude oil pollution in intertidal zones.
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Affiliation(s)
- Yuying Pan
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China.
| | - Lina Tian
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Qiaoling Zhao
- Zhoushan Institute for Food and Drug Control, Zhoushan, 316021, PR China
| | - Zhen Tao
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Jinsheng Yang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Youlin Zhou
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Rui Cao
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Guangxu Zhang
- School of Fishery, Zhejiang Ocean University, Zhoushan, 316022, PR China
| | - Wenyu Wu
- School of Marine Sciences, University of Maine, Orono, 04469, USA
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Zhang M, Wang X, Ahmed T, Liu M, Wu Z, Luo J, Tian Y, Jiang H, Wang Y, Sun G, Li B. Identification of Genes Involved in Antifungal Activity of Burkholderia seminalis Against Rhizoctonia solani Using Tn5 Transposon Mutation Method. Pathogens 2020; 9:pathogens9100797. [PMID: 32992669 PMCID: PMC7600168 DOI: 10.3390/pathogens9100797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/13/2022] Open
Abstract
Rhizoctonia solani is the causative agent of rice sheath blight disease. In a previous study, we found that the growth of R. solani was inhibited by Burkholderia seminalis strain R456. Therefore, the present study was conducted to identify the genes involved in the antifungal activity of B. seminalis strain R456 by using a Tn5 transposon mutation method. Firstly, we constructed a random insertion transposon library of 997 mutants, out of which 11 mutants showed the defective antifungal activity against R. solani. Furthermore, the 10 antagonism-related genes were successfully identified based on analysis of the Tn5 transposon insertion site. Indeed, this result indicated that three mutants were inserted on an indigenous plasmid in which the same insertion site was observed in two mutants. In addition, the remaining eight mutants were inserted on different genes encoding glycosyl transferase, histone H1, nonribosomal peptide synthetase, methyltransferase, MnmG, sulfate export transporter, catalase/peroxidase HPI and CysD, respectively. Compared to the wild type, the 11 mutants showed a differential effect in bacteriological characteristics such as cell growth, biofilm formation and response to H2O2 stress, revealing the complexity of action mode of these antagonism-related genes. However, a significant reduction of cell motility was observed in the 11 mutants compared to the wild type. Therefore, it can be inferred that the antifungal mechanism of the 10 above-mentioned genes may be, at least partially, due to the weakness of cell motility. Overall, the result of this study will be helpful for us to understand the biocontrol mechanism of this bacterium.
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Affiliation(s)
- Muchen Zhang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Xiaoxuan Wang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Temoor Ahmed
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Mengju Liu
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Zhifeng Wu
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Jinyan Luo
- Department of Plant Quarantine, Shanghai Extension and Service Center of Agriculture Technology, Shanghai 201103, China;
| | - Ye Tian
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Hubiao Jiang
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
| | - Yanli Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
- Correspondence: (Y.W.); (B.L.); Tel.: +86-0571-88982412 (Y.W. & B.L.)
| | - Guochang Sun
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
| | - Bin Li
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China; (M.Z.); (X.W.); (T.A.); (M.L.); (Z.W.); (Y.T.); (H.J.)
- Correspondence: (Y.W.); (B.L.); Tel.: +86-0571-88982412 (Y.W. & B.L.)
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