1
|
Kaushik S, Ranjan A, Sidhu A, Singh AK, Sirhindi G. Cadmium toxicity: its' uptake and retaliation by plant defence system and ja signaling. Biometals 2024; 37:755-772. [PMID: 38206521 DOI: 10.1007/s10534-023-00569-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 12/05/2023] [Indexed: 01/12/2024]
Abstract
Cadmium (Cd+2) renders multifarious environmental stresses and highly toxic to nearly all living organisms including plants. Cd causes toxicity by unnecessary augmentation of ROS that targets essential molecules and fundamental processes in plants. In response, plants outfitted a repertory of mechanisms to offset Cd toxicity. The main elements of these are Cd chelation, sequestration into vacuoles, and adjustment of Cd uptake by transporters and escalation of antioxidative mechanism. Signal molecules like phytohormones and reactive oxygen species (ROS) activate the MAPK cascade, the activation of the antioxidant system andsynergistic crosstalk between different signal molecules in order to regulate plant responses to Cd toxicity. Transcription factors like WRKY, MYB, bHLH, bZIP, ERF, NAC etc., located downstream of MAPK, and are key factors in regulating Cd toxicity responses in plants. Apart from this, MAPK and Ca2+signaling also have a salient involvement in rectifying Cd stress in plants. This review highlighted the mechanism of Cd uptake, translocation, detoxification and the key role of defense system, MAPKs, Ca2+ signals and jasmonic acid in retaliating Cd toxicity via synchronous management of various other regulators and signaling components involved under stress condition.
Collapse
Affiliation(s)
- Shruti Kaushik
- Department of Botany, Punjabi University, Patiala, Punjab, 147002, India
| | - Alok Ranjan
- ICAR-National Institute for Plant Biotechnology, New Delhi, 110012, India
- Department of Biotechnology, Patna Women's College, Bihar, 800001, India
| | - Anmol Sidhu
- Department of Botany, Punjabi University, Patiala, Punjab, 147002, India
| | - Anil Kumar Singh
- ICAR-National Institute for Plant Biotechnology, New Delhi, 110012, India
| | - Geetika Sirhindi
- Department of Botany, Punjabi University, Patiala, Punjab, 147002, India.
| |
Collapse
|
2
|
Gautam N, Tiwari M, Kidwai M, Dutta P, Chakrabarty D. Functional characterization of rice metallothionein OsMT-I-Id: Insights into metal binding and heavy metal tolerance mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131815. [DOI: https:/doi.org/10.1016/j.jhazmat.2023.131815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
|
3
|
Gautam N, Tiwari M, Kidwai M, Dutta P, Chakrabarty D. Functional characterization of rice metallothionein OsMT-I-Id: Insights into metal binding and heavy metal tolerance mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131815. [PMID: 37336105 DOI: 10.1016/j.jhazmat.2023.131815] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 06/07/2023] [Accepted: 06/07/2023] [Indexed: 06/21/2023]
Abstract
Metallothioneins (MTs) are cysteine-rich proteins known for their strong metal-binding capabilities, making them effective in detoxifying heavy metals (HMs). This study focuses on characterizing the functional properties of OsMT-I-Id, a type-I Metallothionein found in rice. Using a HM-responsive yeast cup1Δ (DTY4), ycf1∆ (for cadmium), and acr3∆ mutants (for trivalent arsenic), we assessed the impact of OsMT-I-Id on metal accumulation and cellular resilience. Our results demonstrated that yeast cells expressing OsMT-I-Id showed increased tolerance and accumulated higher levels of copper (Cu), arsenic (As), and cadmium (Cd), compared to control cells. This can be attributed to the protein's ability to chelate and bind HMs. Site-directed mutagenesis was employed to investigate the specific contributions of cysteine residues. The study revealed that yeast cells with a mutated C-domain displayed heightened HM sensitivity, while cells with a mutated N-domain exhibited reduced sensitivity. This underscores the critical role of C-cysteine-rich domains in metal binding and tolerance of type-I rice MTs. Furthermore, the study identified the significance of the 12th cysteine position at the N-domain and the 68th and 72nd cysteine positions at the C-domain in influencing OsMT-I-Id metal-binding capacity. This research provides novel insights into the structure-function relationship and metal binding properties of type-I plant MTs.
Collapse
Affiliation(s)
- Neelam Gautam
- Biotechnology and Molecular Biology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Madhu Tiwari
- Biotechnology and Molecular Biology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Maria Kidwai
- Biotechnology and Molecular Biology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Prasanna Dutta
- Biotechnology and Molecular Biology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Debasis Chakrabarty
- Biotechnology and Molecular Biology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| |
Collapse
|
4
|
Ma Y, Xue M, Zhang X, Chen S. Genome-wide analysis of the metallothionein gene family in cassava reveals its role in response to physiological stress through the regulation of reactive oxygen species. BMC PLANT BIOLOGY 2023; 23:227. [PMID: 37118665 PMCID: PMC10142807 DOI: 10.1186/s12870-023-04174-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 03/16/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND Cassava (Manihot esculenta Crantz) is widely planted in tropical and several subtropical regions in which drought, high temperatures, and other abiotic stresses occur. Metallothionein (MT) is a group of conjugated proteins with small molecular weight and rich in cysteine. These proteins play a substantial role in response to physiological stress through the regulation of reactive oxygen species (ROS). However, the biological functions of MT genes in cassava are unknown. RESULTS A total of 10 MeMT genes were identified in the cassava genome. The MeMTs were divided into 3 groups (Types 2-4) based on the contents and distribution of Cys residues. The MeMTs exhibited tissue-specific expression and located on 7 chromosomes. The MeMT promoters contain some hormones regulatory and stresses responsiveness elements. MeMTs were upregulated under hydrogen peroxide (H2O2) treatment and in respond to post-harvest physiological deterioration (PPD). The results were consistent with defense-responsive cis-acting elements in the MeMT promoters. Further, four of MeMTs were selected and silenced by using the virus-induced gene silencing (VIGS) method to evaluate their functional characterization. The results of gene-silenced cassava suggest that MeMTs are involved in oxidative stress resistance, as ROS scavengers. CONCLUSION We identified the 10 MeMT genes, and explore their evolutionary relationship, conserved motif, and tissue-specific expression. The expression profiles of MeMTs under three kinds of abiotic stresses (wounding, low-temperature, and H2O2) and during PPD were analyzed. The tissue-specific expression and the response to abiotic stresses revealed the role of MT in plant growth and development. Furthermore, silenced expression of MeMTs in cassava leaves decreased its tolerance to ROS, consistent with its predicted role as ROS scavengers. In summary, our results suggest an important role of MeMTs in response to physiological stress as well as species adaptation via the regulation of ROS homeostasis.
Collapse
Affiliation(s)
- Yanyan Ma
- School of Life Sciences, Hainan University, Haikou, 570228, China
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, 571101, China
| | - Maofu Xue
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, 571101, China
| | - Xiaofei Zhang
- Alliance of Bioversity International and CIAT, Cali, 763537, Colombia
| | - Songbi Chen
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Ministry of Agriculture for Germplasm Resources Conservation and Utilization of Cassava, Haikou, 571101, China.
| |
Collapse
|
5
|
Seregin IV, Kozhevnikova AD. Phytochelatins: Sulfur-Containing Metal(loid)-Chelating Ligands in Plants. Int J Mol Sci 2023; 24:2430. [PMID: 36768751 PMCID: PMC9917255 DOI: 10.3390/ijms24032430] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/20/2023] [Accepted: 01/23/2023] [Indexed: 01/28/2023] Open
Abstract
Phytochelatins (PCs) are small cysteine-rich peptides capable of binding metal(loid)s via SH-groups. Although the biosynthesis of PCs can be induced in vivo by various metal(loid)s, PCs are mainly involved in the detoxification of cadmium and arsenic (III), as well as mercury, zinc, lead, and copper ions, which have high affinities for S-containing ligands. The present review provides a comprehensive account of the recent data on PC biosynthesis, structure, and role in metal(loid) transport and sequestration in the vacuoles of plant cells. A comparative analysis of PC accumulation in hyperaccumulator plants, which accumulate metal(loid)s in their shoots, and in the excluders, which accumulate metal(loid)s in their roots, investigates the question of whether the endogenous PC concentration determines a plant's tolerance to metal(loid)s. Summarizing the available data, it can be concluded that PCs are not involved in metal(loid) hyperaccumulation machinery, though they play a key role in metal(loid) homeostasis. Unraveling the physiological role of metal(loid)-binding ligands is a fundamental problem of modern molecular biology, plant physiology, ionomics, and toxicology, and is important for the development of technologies used in phytoremediation, biofortification, and phytomining.
Collapse
Affiliation(s)
- Ilya V. Seregin
- K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya St., 35, 127276 Moscow, Russia
| | | |
Collapse
|
6
|
Kolhe N, Damle E, Pradhan A, Zinjarde S. A comprehensive assessment of Yarrowia lipolytica and its interactions with metals: Current updates and future prospective. Biotechnol Adv 2022; 59:107967. [PMID: 35489656 DOI: 10.1016/j.biotechadv.2022.107967] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 04/22/2022] [Accepted: 04/22/2022] [Indexed: 11/16/2022]
Abstract
The non-conventional yeast Yarrowia lipolytica has been popular as a model system for understanding biological processes such as dimorphism and lipid accumulation. The organism can efficiently utilize hydrophobic substrates (hydrocarbons and triglycerides) thereby rendering it relevant in bioremediation of oil polluted environments. The current review focuses on the interactions of this fungus with metal pollutants and its potential application in bioremediation of metal contaminated locales. This fungus is intrinsically equipped with a variety of physiological and biochemical features that enable it to tide over stress conditions induced by the presence of metals. Production of enzymes such as phosphatases, reductases and superoxide dismutases are worth a special mention. In the presence of metals, levels of inherently produced metal binding proteins (metallothioneins) and the pigment melanin are seen to be elevated. Morphological alterations with respect to biofilm formation and dimorphic transition from yeast to mycelial form are also induced by certain metals. The biomass of Y. lipolytica is inherently important as a biosorbent and cell surface modification, process optimization or whole cell immobilization techniques have aided in improving this capability. In the presence of metals such as mercury, cadmium, copper and uranium, the culture forms nanoparticulate deposits. In addition, on account of its intrinsic reductive ability, Y. lipolytica is being exploited for synthesizing nanoparticles of gold, silver, cadmium and selenium with applications as antimicrobial compounds, location agents for bioimaging and as feed supplements. This versatile organism thus has great potential in interacting with various metals and addressing problems related to their pollutant status.
Collapse
Affiliation(s)
- Nilesh Kolhe
- Department of Biotechnology (with jointly merged Institute of Bioinformatics and Biotechnology), Savitribai Phule Pune University, Pune 411007, India
| | - Eeshan Damle
- Department of Biotechnology (with jointly merged Institute of Bioinformatics and Biotechnology), Savitribai Phule Pune University, Pune 411007, India
| | - Aditya Pradhan
- Department of Biotechnology (with jointly merged Institute of Bioinformatics and Biotechnology), Savitribai Phule Pune University, Pune 411007, India
| | - Smita Zinjarde
- Department of Biotechnology (with jointly merged Institute of Bioinformatics and Biotechnology), Savitribai Phule Pune University, Pune 411007, India.
| |
Collapse
|
7
|
Podar D, Maathuis FJM. The role of roots and rhizosphere in providing tolerance to toxic metals and metalloids. PLANT, CELL & ENVIRONMENT 2022; 45:719-736. [PMID: 34622470 DOI: 10.1111/pce.14188] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/23/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
Human activity and natural processes have led to the widespread dissemination of metals and metalloids, many of which are toxic and have a negative impact on plant growth and development. Roots, as the first point of contact, are essential in endowing plants with tolerance to excess metal(loid) in the soil. The most important root processes that contribute to tolerance are: adaptation of transport processes that affect uptake efflux and long-distance transport of metal(loid)s; metal(loid) detoxification within root cells via conjugation to thiol rich compounds and subsequent sequestration in the vacuole; plasticity in root architecture; the presence of bacteria and fungi in the rhizosphere that impact on metal(loid) bioavailability; the role of root exudates. In this review, we provide details on these processes and assess their relevance on the detoxification of arsenic, cadmium, mercury and zinc in crops. Furthermore, we assess which of these strategies have been tested in field conditions and whether they are effective in terms of improving crop metal(loid) tolerance.
Collapse
Affiliation(s)
- Dorina Podar
- Department of Molecular Biology and Biotechnology, Faculty of Biology-Geology, Babeș-Bolyai University, Cluj, Romania
| | | |
Collapse
|
8
|
Seregin IV, Kozhevnikova AD. Low-molecular-weight ligands in plants: role in metal homeostasis and hyperaccumulation. PHOTOSYNTHESIS RESEARCH 2021; 150:51-96. [PMID: 32653983 DOI: 10.1007/s11120-020-00768-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Mineral nutrition is one of the key factors determining plant productivity. In plants, metal homeostasis is achieved through the functioning of a complex system governing metal uptake, translocation, distribution, and sequestration, leading to the maintenance of a regulated delivery of micronutrients to metal-requiring processes as well as detoxification of excess or non-essential metals. Low-molecular-weight ligands, such as nicotianamine, histidine, phytochelatins, phytosiderophores, and organic acids, play an important role in metal transport and detoxification in plants. Nicotianamine and histidine are also involved in metal hyperaccumulation, which determines the ability of some plant species to accumulate a large amount of metals in their shoots. In this review we extensively summarize and discuss the current knowledge of the main pathways for the biosynthesis of these ligands, their involvement in metal uptake, radial and long-distance transport, as well as metal influx, isolation and sequestration in plant tissues and cell compartments. It is analyzed how diverse endogenous ligand levels in plants can determine their different tolerance to metal toxic effects. This review focuses on recent advances in understanding the physiological role of these compounds in metal homeostasis, which is an essential task of modern ionomics and plant physiology. It is of key importance in studying the influence of metal deficiency or excess on various physiological processes, which is a prerequisite to the improvement of micronutrient uptake efficiency and crop productivity and to the development of a variety of applications in phytoremediation, phytomining, biofortification, and nutritional crop safety.
Collapse
Affiliation(s)
- I V Seregin
- K.A. Timiryazev Institute of Plant Physiology RAS, IPPRAS, Botanicheskaya st., 35, Moscow, Russian Federation, 127276.
| | - A D Kozhevnikova
- K.A. Timiryazev Institute of Plant Physiology RAS, IPPRAS, Botanicheskaya st., 35, Moscow, Russian Federation, 127276
| |
Collapse
|
9
|
Zhou T, Yue CP, Zhang TY, Liu Y, Huang JY, Hua YP. Integrated ionomic and transcriptomic dissection reveals the core transporter genes responsive to varying cadmium abundances in allotetraploid rapeseed. BMC PLANT BIOLOGY 2021; 21:372. [PMID: 34388971 PMCID: PMC8362225 DOI: 10.1186/s12870-021-03136-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/25/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Oilseed rape (B. napus L.) has great potential for phytoremediation of cadmium (Cd)-polluted soils due to its large plant biomass production and strong metal accumulation. Soil properties and the presence of other soluble compounds or ions, cause a heterogeneous distribution of Cd. RESULTS The aim of our study was to reveal the differential responses of B. napus to different Cd abundances. Herein, we found that high Cd (50 μM) severely inhibited the growth of B. napus, which was not repressed by low Cd (0.50 μM) under hydroponic culture system. ICP-MS assays showed that the Cd2+ concentrations in both shoots and roots under 50 μM Cd were over 10 times higher than those under 0.50 μM Cd. Under low Cd, the concentrations of only shoot Ca2+/Mn2+ and root Mn2+ were obviously changed (both reduced); under high Cd, the concentrations of most cations assayed were significantly altered in both shoots and roots except root Ca2+ and Mg2+. High-throughput transcriptomic profiling revealed a total of 18,021 and 1408 differentially expressed genes under high Cd and low Cd conditions, respectively. The biological categories related to the biosynthesis of plant cell wall components and response to external stimulus were over-accumulated under low Cd, whereas the terms involving photosynthesis, nitrogen transport and response, and cellular metal ion homeostasis were highly enriched under high Cd. Differential expression of the transporters responsible for Cd uptake (NRAMPs), transport (IRTs and ZIPs), sequestration (HMAs, ABCs, and CAXs), and detoxification (MTPs, PCR, MTs, and PCSs), and some other essential nutrient transporters were investigated, and gene co-expression network analysis revealed the core members of these Cd transporters. Some Cd transporter genes, especially NRAMPs and IRTs, showed opposite responsive patterns between high Cd and low Cd conditions. CONCLUSIONS Our findings would enrich our understanding of the interaction between essential nutrients and Cd, and might also provide suitable gene resources and important implications for the genetic improvement of plant Cd accumulation and resistance through molecular engineering of these core genes under varying Cd abundances in soils.
Collapse
Affiliation(s)
- Ting Zhou
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| | - Cai-peng Yue
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| | - Tian-yu Zhang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| | - Ying Liu
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| | - Jin-yong Huang
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| | - Ying-peng Hua
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, 450001 China
| |
Collapse
|
10
|
Liu J, Zhang J, Kim SH, Lee HS, Marinoia E, Song WY. Characterization of Brassica rapa metallothionein and phytochelatin synthase genes potentially involved in heavy metal detoxification. PLoS One 2021; 16:e0252899. [PMID: 34086824 PMCID: PMC8177407 DOI: 10.1371/journal.pone.0252899] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/24/2021] [Indexed: 11/18/2022] Open
Abstract
Brassica rapa is an important leafy vegetable that can potentially accumulate high concentrations of cadmium (Cd), posing a risk to human health. The aim of the present study was to identify cadmium detoxifying molecular mechanisms in B. rapa using a functional cloning strategy. A cDNA library constructed from roots of B. rapa plants treated with Cd was transformed into the Cd sensitive yeast mutant strain DTY167 that lacks the yeast cadmium factor (YCF1), and resistant yeast clones were selected on Cd containing media. Two hundred genes potentially conferring cadmium resistance were rescued from the surviving yeast clones and sequenced. Sequencing analysis revealed that genes encoding for metallothionein (MT)1, MT2a, MT2b and MT3, and phytochelatin synthase (PCS)1 and PCS2 accounted for 35.5%, 28.5%, 4%, 11.3%, 18.7% and 2%, respectively of the genes identified. MTs and PCSs expressing DTY167 cells showed resistance to Cd as well as to Zn. PCS1 expressing yeast cells were also more resistant to Pb compared to those expressing MTs or PCS2. RT-PCR results showed that Cd treatment strongly induced the expression levels of MTs in the root and shoot. Furthermore, the different MTs and PCSs exhibited tissue specific expression. The results indicate that MTs and PCS genes potentially play a central role in detoxifying Cd and other toxic metals in B. rapa.
Collapse
Affiliation(s)
- Jiayou Liu
- International Research Center for Environmental Membrane Biology, Department of Horticulture, Foshan University, Foshan, Guangdong, China
| | - Jie Zhang
- International Research Center for Environmental Membrane Biology, Department of Horticulture, Foshan University, Foshan, Guangdong, China
| | - Sun Ha Kim
- College of Agriculture and Life Sciences, Chungnam National University, Daejeon, Korea
| | - Hyun-Sook Lee
- College of Agriculture and Life Sciences, Chungnam National University, Daejeon, Korea
| | - Enrico Marinoia
- International Research Center for Environmental Membrane Biology, Department of Horticulture, Foshan University, Foshan, Guangdong, China
| | - Won-Yong Song
- International Research Center for Environmental Membrane Biology, Department of Horticulture, Foshan University, Foshan, Guangdong, China
- College of Agriculture and Life Sciences, Chungnam National University, Daejeon, Korea
- * E-mail:
| |
Collapse
|
11
|
Rono JK, Le Wang L, Wu XC, Cao HW, Zhao YN, Khan IU, Yang ZM. Identification of a new function of metallothionein-like gene OsMT1e for cadmium detoxification and potential phytoremediation. CHEMOSPHERE 2021; 265:129136. [PMID: 33276998 DOI: 10.1016/j.chemosphere.2020.129136] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/07/2020] [Accepted: 11/25/2020] [Indexed: 05/27/2023]
Abstract
Cadmium (Cd) is a biologically non-essential and toxic heavy metal leaking to the environment via natural emission or anthropogenic activities, thereby contaminating crops and threatening human health. Metallothioneins (MTs) are a group of metal-binding proteins playing critical roles in metal allocation and homeostasis. In this study, we identified a novel function of OsMT1e from rice plants. OsMT1e was dominantly expressed in roots at all developmental stages and, to less extent, expressed in leaves at vegetative and seed filling stages. OsMT1e was mainly targeted to the nucleus and substantially induced by Cd exposure. Expression of OsMT1e in a yeast Cd-sensitive strain ycf1 conferred cellular tolerance to Cd, even though the ycf1 + OsMT1e cells accumulated more Cd than the control cells (ycf1 + pYES2). Both transgenic rice overexpressing (OX) and repressing OsMT1e by RNA interference (RNAi) were developed. Phenotypic analysis revealed that OsMT1e overexpression enhanced the rice growth concerning the increased shoot or root elongation, dry weight and chlorophyll contents, whereas the RNAi lines displayed a sensitive growth phenotype compared to wild-type. Assessment with 0.5, 2 and 10 μM Cd for two weeks revealed that the RNAi lines accumulated less Cd, while the OX lines had an increased Cd accumulation in root and shoot tissues. The contrasting Cd accumulation phenotypes between the OX and RNAi lines were further confirmed by a long-term study with 0.5 μM Cd for one month. Overall, the study unveiled a new function of OsMT1e in rice, which can be potentially used for engineering genotypes for phytoremediation or minimizing Cd in rice crops.
Collapse
Affiliation(s)
- Justice Kipkorir Rono
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Le Le Wang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xue Chun Wu
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Hong Wei Cao
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ya Ning Zhao
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Irfan Ullah Khan
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhi Min Yang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| |
Collapse
|
12
|
Yan D, Wang S, Ding K, He Y, Fan L, Ding L, Jiang X. Strontium Uptake and Effect in Lettuce and Radish Cultivated Under Hydroponic Conditions. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 103:453-460. [PMID: 31183504 DOI: 10.1007/s00128-019-02647-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 06/04/2019] [Indexed: 06/09/2023]
Abstract
The accumulation of strontium (Sr) in lettuce and radish under 0 (control), 0.5, 1, 2.5, 5, and 10 mM Sr treatments in hydroponic solution at 16, 23 and 30 days and the effects of Sr stress on six nutrient elements in plants were investigated. The results showed that Sr concentrations in plant aerial and underground parts increased in low-Sr treatments (0.5, 1 and 2.5 mM) and fluctuated in high-Sr treatments (5 and 10 mM) throughout the three sampling periods. Sr concentrations were higher in roots than in leaves, reaching 108.8 ± 14.7 and 134.1 ± 1.2 mg/g in lettuce and radish roots, respectively, after 10 mM Sr treatment. Translocation factor (TF) values (ratio of the Sr concentrations in aerial parts to that in roots) were inversely related to the Sr content in the hydroponic solution, and reached 1.45 ± 0.17 to 0.15 ± 0.03 and 1.06 ± 0.20 to 0.12 ± 0.004 for lettuce and radish. The variation in chlorophyll content was consistent with that in plant biomass.
Collapse
Affiliation(s)
- Dong Yan
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Shuifeng Wang
- Analytical and Testing Center, Beijing Normal University, Beijing, 100875, China
| | - Kuke Ding
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Yingxue He
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Li Fan
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Lixing Ding
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China
| | - Xiaoyan Jiang
- Department of Radiology, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, 100088, China.
| |
Collapse
|
13
|
Ferreira AD, Viana DG, Egreja Filho FB, Pires FR, Bonomo R, Martins LF, Pinto Nascimento MC, Silva Cruz LB. Phytoremediation in flooded environments: Dynamics of barium absorption and translocation by Eleocharis acutangula. CHEMOSPHERE 2019; 219:836-844. [PMID: 30572235 DOI: 10.1016/j.chemosphere.2018.12.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/24/2018] [Accepted: 12/09/2018] [Indexed: 06/09/2023]
Abstract
Macrophytes are widely used in water treatment and have potential for remediation of flooded soils. Many techniques have been proposed to increase the phytoextraction of metals by macrophytes, however, the knowledge of periods of maximum absorption and translocation is essential and is a gap in the management of phytoremediation. To evaluate the absorption and translocation of Ba over time by Eleocharis acutangula, a greenhouse experiment was conducted and the dry matter production of plants, Ba content in the roots and aerial parts, mass of Ba accumulated in plants, translocation factors and removal coefficients of Ba, and Ba content in two layers of the soil (0.0-0.1 m and 0.1-0.2 m) were determined. The highest translocation rates were observed after 105 days of cultivation, when the plants reached a state of hyperaccumulation. The maximum accumulation of barium occurred in the aerial parts of the plants at 105 days and in the roots at both 120 and 180 days. The barium content was reduced up to 120 days, as a result of an increase in available barium content in the soil layer of 0.0-0.1 m up to 105 days and in the layer 0.10-0.20 m up to 120 days, favoring the intense accumulation of Ba during this period. After 120 days of cultivation, the accumulation in the roots maintained a high coefficient of removal of Ba from the soil to the plant. After 180 days the available barium in the soil was depleted due to this high rate of removal by the roots.
Collapse
Affiliation(s)
- Amanda Duim Ferreira
- Federal University of Espiríto Santo, Department of Biological and Agriculture Science, Rodovia BR 101 Norte, Litoranêao s/n, São Mateus, 29932-540, ES, Brazil.
| | - Douglas Gomes Viana
- University of São Paulo, "Luiz de Queiroz" College of Agriculture, Department of Soil Science, Piracicaba, São Paulo, Brazil
| | - Fernando Barboza Egreja Filho
- Federal University of Minas Gerais, Departament of Chemistry, Institute of Exact Sciences, Belo Horizonte 31270-901, MG, Brazil
| | - Fábio Ribeiro Pires
- Federal University of Espiríto Santo, Department of Biological and Agriculture Science, Rodovia BR 101 Norte, Litoranêao s/n, São Mateus, 29932-540, ES, Brazil
| | - Robson Bonomo
- Federal University of Espiríto Santo, Department of Biological and Agriculture Science, Rodovia BR 101 Norte, Litoranêao s/n, São Mateus, 29932-540, ES, Brazil
| | | | | | | |
Collapse
|
14
|
Huang YY, Gong FY, Shen C, He CT, Fu HL, Wang XS, Tan X, Xu PL, Yang ZY. Cloning, characterization and expression analysis of metallothioneins from Ipomoea aquatica and their cultivar-dependent roles in Cd accumulation and detoxification. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 165:450-458. [PMID: 30218968 DOI: 10.1016/j.ecoenv.2018.08.089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 08/18/2018] [Accepted: 08/23/2018] [Indexed: 06/08/2023]
Abstract
To explore the possible roles of metallothioneins (MTs) played in cadmium (Cd) accumulation of water spinach, three IaMT genes, IaMT1, IaMT2 and IaMT3 in a high-shoot-Cd (T308) and a low-shoot-Cd accumulation cultivar (QLQ) were cloned, characterized, and quantitated. Gene expression analysis suggested that the expression of the IaMTs was differentially regulated by Cd stress in different cultivars, and T308 showed higher MTs expression overall. Furthermore, only shoot IaMT3 expression was cultivar dependent among the three IaMTs. Antioxidant analysis showed that the high production of IaMTs in T308 should be associated with its high oxidation resistance. The role of IaMTs in protecting against Cd toxicity was demonstrated in vitro via recombinant E. coli strains. The results showed that IaMT1 correlated with neither Cd tolerance nor Cd accumulation of E. coli, while IaMT2 conferred Cd tolerance in E. coli, IaMT2 and IaMT3 increased Cd accumulation in E. coli. These findings help to clarify the roles of IaMTs in Cd accumulation, and increase our understanding of the cultivar-dependent Cd accumulation in water spinach.
Collapse
Affiliation(s)
- Ying-Ying Huang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Fei-Yue Gong
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Chuang Shen
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Chun-Tao He
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Hui-Ling Fu
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Xue-Song Wang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Xiao Tan
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China
| | - Pei-Lin Xu
- State Key Laboratory of Biocontrol, Biotechnology Research Center, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China.
| | - Zhong-Yi Yang
- State Key Laboratory for Biocontrol, School of Life Sciences, Sun Yat-Sen University, Xingang Xi Road 135, Guangzhou 510275, China.
| |
Collapse
|
15
|
Xu X, Duan L, Yu J, Su C, Li J, Chen D, Zhang X, Song H, Pan Y. Characterization analysis and heavy metal-binding properties of CsMTL3 in Escherichia coli. FEBS Open Bio 2018; 8:1820-1829. [PMID: 30410861 PMCID: PMC6212650 DOI: 10.1002/2211-5463.12520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/16/2018] [Accepted: 08/29/2018] [Indexed: 11/30/2022] Open
Abstract
Members of the metallothionein (MT) superfamily are involved in coordinating transition metal ions. In plants, MT family members are characterized by their arrangement of Cys residues. In this study, one member of the MT superfamily, CsMTL3, was characterized from a complementary DNA (cDNA) library from young cucumber fruit; CsMTL3 is predicted to encode a 64 amino acid protein with a predicted molecular mass of 6.751 kDa. Phylogenetic analysis identified it as a type 3 family member as the arrangement of N-terminal Cys residues was different from that of MT-like 2. Heterologous expression of CsMTL3 in Escherichia coli improved their heavy metal tolerance, particularly to Cd2+ and Cu2+, and led to increased uptake of Cd2+ and Cu2+; increased uptake was also observed for cells expressing Arabidopsis thaliana metallothionein 3 (AtMT3) and phytochelatin-like (PCL), with greatest uptake in PCL-expressing cells. These findings demonstrate that CsMTL3 can improve metal tolerance, especially for Cd2+ ions, when heterologously expressed in E. coli, and suggest that the composition and arrangement of N-terminal Cys residues are associated with binding capacity and preference for different metal ions.
Collapse
Affiliation(s)
- Xing Xu
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Ling Duan
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Jingwen Yu
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Chenggang Su
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Jinhua Li
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Dan Chen
- Comprehensive Testing Center of Guangzhou Entry‐Exit Inspection & Quarantine BureauGuangzhouChina
| | - Xingguo Zhang
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Hongyuan Song
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| | - Yu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous RegionsMinistry of EducationSouthwest UniversityChongqingChina
- College of Horticulture and Landscape ArchitectureSouthwest UniversityChongqingChina
| |
Collapse
|
16
|
Bioaccumulation of Arsenic by Engineered Escherichia coli Cells Expressing Rice Metallothionein Isoforms. Curr Microbiol 2018; 75:1537-1542. [DOI: 10.1007/s00284-018-1556-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 08/22/2018] [Indexed: 10/28/2022]
|
17
|
Jaiswal PS, Mittal N, Randhawa GS. Cyamopsis tetragonoloba type 1 metallothionein (CtMT1) gene is upregulated under drought stress and its protein product has an additional C-X-C motif and unique metal binding pattern. Int J Biol Macromol 2018; 119:1324-1334. [PMID: 30098366 DOI: 10.1016/j.ijbiomac.2018.08.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/05/2018] [Accepted: 08/07/2018] [Indexed: 11/19/2022]
Abstract
Metallothioneins (MTs) are involved in cellular homeostasis of essential metal ions and detoxification of nonessential metal ions. We report here the identification of four MT genes, CtMT1, CtMT2, CtMT3 and CtMT4, encoding CtMT1, CtMT2, CtMT3 and CtMT4 proteins, respectively, from the industrial guar crop. The primary structures of last three proteins were similar to those of respective MT proteins of other plants but the CtMT1 protein primary structure was different from the other plant MT1 proteins in having an additional C-X-C motif. The four MT genes showed tissue specific expression patterns suggesting their specific roles in different tissues. High expression of CtMT1 gene was observed in roots and nodules whereas CtMT2 and CtMT3 genes showed high expression in leaves. The expression of CtMT4 gene was high in seeds. The qRT-PCR studies revealed upregulation in expression of CtMT1 gene under drought stress. Recombinant CtMT1 protein was produced in E. coli Rosetta cells and purified by metal affinity chromatography. The purified protein showed antioxidant property and the order of its metal ion binding affinities was Cu2+ > Zn2+ > Fe2+ > Cd2+. This information about CtMT1 protein is expected to be useful in understanding its role in drought tolerance and other physiological processes of guar.
Collapse
Affiliation(s)
- Poonam Subhash Jaiswal
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Nishu Mittal
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Gursharn Singh Randhawa
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| |
Collapse
|
18
|
Pan Y, Zhu M, Wang S, Ma G, Huang X, Qiao C, Wang R, Xu X, Liang Y, Lu K, Li J, Qu C. Genome-Wide Characterization and Analysis of Metallothionein Family Genes That Function in Metal Stress Tolerance in Brassica napus L. Int J Mol Sci 2018; 19:E2181. [PMID: 30049941 PMCID: PMC6121329 DOI: 10.3390/ijms19082181] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/21/2018] [Accepted: 07/24/2018] [Indexed: 12/23/2022] Open
Abstract
Brassica plants exhibit both high biomass productivity and high rates of heavy metal absorption. Metallothionein (MT) proteins are low molecular weight, cysteine-rich, metal-binding proteins that play crucial roles in protecting plants from heavy metal toxicity. However, to date, MT proteins have not been systematically characterized in Brassica. In this study, we identified 60 MTs from Arabidopsis thaliana and five Brassica species. All the MT family genes from Brassica are closely related to Arabidopsis MTs, encoding putative proteins that share similar functions within the same clades. Genome mapping analysis revealed high levels of synteny throughout the genome due to whole genome duplication and segmental duplication events. We analyzed the expression levels of 16 Brassica napus MTs (BnaMTs) by RNA-sequencing and real-time RT-PCR (RT-qPCR) analysis in plants under As3+ stress. These genes exhibited different expression patterns in various tissues. Our results suggest that BnaMT3C plays a key role in the response to As3+ stress in B. napus. This study provides insight into the phylogeny, origin, and evolution of MT family members in Brassica, laying the foundation for further studies of the roles of MT proteins in these important crops.
Collapse
Affiliation(s)
- Yu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Meichen Zhu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Shuxian Wang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Guoqiang Ma
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xiaohu Huang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Cailin Qiao
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Rui Wang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xinfu Xu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Ying Liang
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Kun Lu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Jiana Li
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Cunmin Qu
- Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
- Chongqing Rapeseed Engineering Research Center, College of Agronomy and Biotechnology, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| |
Collapse
|
19
|
Mierek-Adamska A, Dąbrowska GB, Blindauer CA. The type 4 metallothionein from Brassica napus seeds folds in a metal-dependent fashion and favours zinc over other metals. Metallomics 2018; 10:1430-1443. [DOI: 10.1039/c8mt00161h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rapeseed MT4 only folds properly in the presence of Zn2+ and thus may serve as a selectivity filter for metal accumulation in plant embryos.
Collapse
Affiliation(s)
- Agnieszka Mierek-Adamska
- Department of Genetics
- Faculty of Biology and Environmental Protection
- Nicolaus Copernicus University
- 87-100 Toruń
- Poland
| | - Grażyna B. Dąbrowska
- Department of Genetics
- Faculty of Biology and Environmental Protection
- Nicolaus Copernicus University
- 87-100 Toruń
- Poland
| | | |
Collapse
|
20
|
Jain S, Muneer S, Guerriero G, Liu S, Vishwakarma K, Chauhan DK, Dubey NK, Tripathi DK, Sharma S. Tracing the role of plant proteins in the response to metal toxicity: a comprehensive review. PLANT SIGNALING & BEHAVIOR 2018; 13:e1507401. [PMID: 30188762 PMCID: PMC6204846 DOI: 10.1080/15592324.2018.1507401] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Plants are sessile in nature, but are capable to evade from high level concentration of heavy metals like Cd, Hg, Cu, through various metabolic pathways. Some of the pathways regulate normal metabolism in plants, whereas others are required for for their survival under metal toxicity. Different plant proteins act as transporters to transfer metal from one organelle to the other and further eliminate it out from the plants. Initially, exposure of heavy metals/metalloids to plants lead to over expression of proteins which in turn stimulate other stress-related genes. Further, they activate signalling mechanism like MAPK cascade, Cd-Calmodulin signalling pathway, and oxidation signalling pathway that lead to generation of ROS (reactive oxygen species). Once these ROS (highly unstable) are formed, they generate free radicals which react with macromolecules like proteins and DNA. This has negative impact on plant growth and leads to ageing and, eventually, cell death. The uncontrolled, destructive processes damage plants physiologically and ultimately lead to oxidative stress. Activation of antioxidant enzymes like SOD (superoxide dismutase) and CAT (catalase) allows plants to cope under oxidative stress conditions. Among plant proteins, some of the antioxidant enzymes like glutathione, and APX (ascorbate peroxidase) play defensive roles against abiotic stress in plants. Chaperones help in protein folding to maintain protein stability under stress conditions. With this background, the present review gives a brief account of the functions, localization and expression pattern of plant proteins against metal/metalloid toxicity. Moreover, the aim of this review is also to summarize the cutting edge research of plant protein and metal interfaces and their future prospects.
Collapse
Affiliation(s)
- Shruti Jain
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Allahabad, India
| | - Sowbiya Muneer
- Department of Horticulture, Gyeongsang National University, Jinju, Korea
- Department of Agriculture Engineering, Centre for Agricultural Innovations and Advanced Learning, Vellore Institute of Technology, Vellore, India
| | - Gea Guerriero
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, Esch/Alzette, Luxembourg
| | - Shiliang Liu
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu, China
| | - Kanchan Vishwakarma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Allahabad, India
| | - Devendra Kumar Chauhan
- D D Pant Interdisciplinary Research Laboratory, Department of Botany, University of Allahabad, Allahabad, India
| | - Nawal Kishore Dubey
- Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi, India
| | - Durgesh Kumar Tripathi
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Allahabad, India
- Amity Institute of Organic Agriculture (AIOA), Amity University, Noida, Uttar Pradesh
- CONTACT Durgesh Kumar Tripathi ; Shivesh Sharma ; Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, 211004 Allahabad, India
| | - Shivesh Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Allahabad, India
| |
Collapse
|
21
|
Chen Y, Zhi J, Li X, Zhang H, Liu H, Xu J. Diversity in cadmium accumulation and resistance associated with various metallothionein genes (type III) in Phytolacca americana L. Int J Biol Macromol 2017; 108:704-709. [PMID: 29197572 DOI: 10.1016/j.ijbiomac.2017.11.152] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/23/2017] [Accepted: 11/23/2017] [Indexed: 11/19/2022]
Abstract
Metallothioneins (MTs) are known for their heavy metal deoxidation during phytoremediation. To estimate their roles in the cadmium (Cd) hyperaccumulator Phytolacca americana L., three MT genes, PaMT3-1, PaMT3-2 and PaMT3-3, belonging to the MT3 subfamily were cloned. They separately encoded 63, 65 and 65 amino acids, containing12, 10 and 11 cysteines (Cys), respectively. Each gene was individually transformed and expressed in Escherichia coli cells. A Cd-resistance assay showed that the recombinant strains had enhanced survival rates, especially those containing PaMT3-1 and PaMT3-3. Additionally, the recombinant strains were high Cd accumulators, with the recombinant PaMT3-1's maximum accumulation being 2.16 times that of the empty vector strains. The numbers of cysteines and the structures of MT proteins were associated with the Cd enrichment and resistance capabilities. PaMT3-1 could be an effective gene resource in future plant Cd remediation-related breeding programs.
Collapse
Affiliation(s)
- Yongkun Chen
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China
| | - Junkai Zhi
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China
| | - Xiaoyu Li
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China
| | - Hao Zhang
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China
| | - Huabo Liu
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China
| | - Jichen Xu
- National Engineering Laboratory of Tree Breeding, Beijing Forestry University, 100083, China.
| |
Collapse
|
22
|
Ćalić I, Koch J, Carey D, Addo-Quaye C, Carlson JE, Neale DB. Genome-wide association study identifies a major gene for beech bark disease resistance in American beech (Fagus grandifolia Ehrh.). BMC Genomics 2017; 18:547. [PMID: 28728575 PMCID: PMC5520234 DOI: 10.1186/s12864-017-3931-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 07/07/2017] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The American Beech tree (Fagus grandifolia Ehrh.), native to eastern North America, is ecologically important and provides high quality wood products. This species is susceptible to beech bark disease (BBD) and is facing high rates of mortality in North America. The disease occurs from an interaction between the woolly beech scale insect (Cryptococcus fagisuga), one of two species of the fungus Neonectria (N. faginata or N. ditissima), and American Beech trees. METHODS In this case-control genome-wide association study (GWAS), we tested 16 K high quality SNPs using the Affymetrix Axiom 1.5 K - 50 K assay to genotype an association population of 514 individuals. We also conducted linkage analysis in a full-sib family of 115 individuals. Fisher's exact test and logistic regression tests were performed to test associations between SNPs and phenotypes. RESULTS Association tests revealed four highly significant SNPs on chromosome (Chr) 5 for a single gene (Mt), which encodes a mRNA for metallothionein-like protein (metal ion binding) in Fagus sylvatica. Metallothioneins represent Cys-rich metal chelators able to coordinate metal atoms and may play an important role in the resistance mechanisms against beech scale insect. CONCLUSION The GWAS study has identified a single locus of major effect contributing to beech bark disease resistance. Knowledge of this genetic locus contributing to resistance might be used in applied breeding, conservation and restoration programs.
Collapse
Affiliation(s)
- Irina Ćalić
- Department of Plant Sciences, University of California, Davis, CA 95616 USA
| | - Jennifer Koch
- USDA Forest Service, Northern Research Station, Forestry Sciences Laboratory, Delaware, OH 43015 USA
| | - David Carey
- USDA Forest Service, Northern Research Station, Forestry Sciences Laboratory, Delaware, OH 43015 USA
| | - Charles Addo-Quaye
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana, 47907 USA
- Present address: Division of Natural Sciences and Mathematics, Lewis-Clark State College, 500 8th Avenue, Lewiston, ID 83501 USA
| | - John E. Carlson
- Schatz Center for Tree Molecular Genetics, Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA 16802 USA
| | - David B. Neale
- Department of Plant Sciences, University of California, Davis, CA 95616 USA
| |
Collapse
|
23
|
Irvine GW, Stillman MJ. Residue Modification and Mass Spectrometry for the Investigation of Structural and Metalation Properties of Metallothionein and Cysteine-Rich Proteins. Int J Mol Sci 2017; 18:ijms18050913. [PMID: 28445428 PMCID: PMC5454826 DOI: 10.3390/ijms18050913] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 04/18/2017] [Accepted: 04/20/2017] [Indexed: 12/23/2022] Open
Abstract
Structural information regarding metallothioneins (MTs) has been hard to come by due to its highly dynamic nature in the absence of metal-thiolate cluster formation and crystallization difficulties. Thus, typical spectroscopic methods for structural determination are limited in their usefulness when applied to MTs. Mass spectrometric methods have revolutionized our understanding of protein dynamics, structure, and folding. Recently, advances have been made in residue modification mass spectrometry in order to probe the hard-to-characterize structure of apo- and partially metalated MTs. By using different cysteine specific alkylation reagents, time dependent electrospray ionization mass spectrometry (ESI-MS), and step-wise “snapshot” ESI-MS, we are beginning to understand the dynamics of the conformers of apo-MT and related species. In this review we highlight recent papers that use these and similar techniques for structure elucidation and attempt to explain in a concise manner the data interpretations of these complex methods. We expect increasing resolution in our picture of the structural conformations of metal-free MTs as these techniques are more widely adopted and combined with other promising tools for structural elucidation.
Collapse
Affiliation(s)
- Gordon W Irvine
- Department of Chemistry, The University of Western Ontario, London, ON N6A 3K7, Canada.
| | - Martin J Stillman
- Department of Chemistry, The University of Western Ontario, London, ON N6A 3K7, Canada.
| |
Collapse
|
24
|
Ansarypour Z, Shahpiri A. Heterologous expression of a rice metallothionein isoform (OsMTI-1b) in Saccharomyces cerevisiae enhances cadmium, hydrogen peroxide and ethanol tolerance. Braz J Microbiol 2017; 48:537-543. [PMID: 28223030 PMCID: PMC5498412 DOI: 10.1016/j.bjm.2016.10.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 10/12/2016] [Accepted: 10/25/2016] [Indexed: 11/02/2022] Open
Abstract
Metallothioneins are a superfamily of low-molecular-weight, cysteine (Cys)-rich proteins that are believed to play important roles in protection against metal toxicity and oxidative stress. The main purpose of this study was to investigate the effect of heterologous expression of a rice metallothionein isoform (OsMTI-1b) on the tolerance of Saccharomyces cerevisiae to Cd2+, H2O2 and ethanol stress. The gene encoding OsMTI-1b was cloned into p426GPD as a yeast expression vector. The new construct was transformed to competent cells of S. cerevisiae. After verification of heterologous expression of OsMTI-1b, the new strain and control were grown under stress conditions. In comparison to control strain, the transformed S. cerevisiae cells expressing OsMTI-1b showed more tolerance to Cd2+ and accumulated more Cd2+ ions when they were grown in the medium containing CdCl2. In addition, the heterologous expression of GST-OsMTI-1b conferred H2O2 and ethanol tolerance to S. cerevisiae cells. The results indicate that heterologous expression of plant MT isoforms can enhance the tolerance of S. cerevisiae to multiple stresses.
Collapse
Affiliation(s)
- Zahra Ansarypour
- Isfahan University of Technology, College of Agriculture, Department of Biotechnology, Isfahan, Iran
| | - Azar Shahpiri
- Isfahan University of Technology, College of Agriculture, Department of Biotechnology, Isfahan, Iran.
| |
Collapse
|
25
|
Independent metal-thiolate cluster formation in C-terminal Cys-rich region of a rice type 1 metallothionein isoform. Int J Biol Macromol 2016; 96:436-441. [PMID: 28013008 DOI: 10.1016/j.ijbiomac.2016.12.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 12/14/2016] [Accepted: 12/16/2016] [Indexed: 11/23/2022]
Abstract
In this study we examined the independent self assembly of metal-binding in C-terminal Cys- rich region of a type 1 metallothionein (MT) isoform from rice (OsMTI-1b). To this end the N-terminal of OsMTI-1b (C-OsMTI-1b) was heterologously expressed in Escherichia coli as fusion protein with glutathione-S-transferase (GST). As compared with control (The E. coli cells containing pET41a without gene), transgenic E. coli cells expressing GST-C-OsMTI-1b accumulated more Ni2+, Cd2+, and Zn2+ from culture medium and showed increased tolerance against these metals. The recombinant GST-C-OsMTI-1b was purified using affinity chromatography. According to in vitro assays the protein GST-C-OsMTI-1b was able to form complexes with Ni2+, Cd2+ and Zn2+. These results demonstrate the formation of independent metal-thiolate cluster at C-terminal Cys-rich region of OsMTI-1b without participation of N-terminal Cys-rich region.
Collapse
|
26
|
Pan Y, Pan Y, Zhai J, Xiong Y, Li J, Du X, Su C, Zhang X. Cucumber Metallothionein-Like 2 (CsMTL2) Exhibits Metal-Binding Properties. Genes (Basel) 2016; 7:E106. [PMID: 27916887 PMCID: PMC5192482 DOI: 10.3390/genes7120106] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 10/24/2016] [Accepted: 11/14/2016] [Indexed: 01/25/2023] Open
Abstract
We identified a novel member of the metallothionein (MT) family, Cucumis sativus metallothionein-like 2 (CsMTL2), by screening a young cucumber fruit complementary DNA (cDNA) library. The CsMTL2 encodes a putative 77-amino acid Class II MT protein that contains two cysteine (Cys)-rich domains separated by a Cys-free spacer region. We found that CsMTL2 expression was regulated by metal stress and was specifically induced by Cd2+ treatment. We investigated the metal-binding characteristics of CsMTL2 and its possible role in the homeostasis and/or detoxification of metals by heterologous overexpression in Escherichia coli cells. Furthermore, we produced a deletion mutant form of the protein, CsMTL2m, that contained the two Cys-rich clusters but lacked the spacer region, in E. coli. We compared the metal-binding properties of CsMTL2 with those of CsMTL2m, the β domain of human metallothionein-like protein 1 (HsMTXb), and phytochelatin-like (PCL) heterologously expressed in E. coli using metal-binding assays. We found that E. coli cells expressing CsMTL2 accumulated the highest levels of Zn2+ and Cd2+ of the four transformed cell types, with levels being significantly higher than those of control cells containing empty vector. E. coli cells expressing CsMTL2 had a higher tolerance for cadmium than for zinc ions. These findings show that CsMTL2 improves metal tolerance when heterologously expressed in E. coli. Future studies should examine whether CsMTL2 improves metal tolerance in planta.
Collapse
Affiliation(s)
- Yu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Yanglu Pan
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Junpeng Zhai
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
- Qijiang District Bureau of Forestry, Chongqing 401420, China.
| | - Yan Xiong
- Institute of Vegetables and Flowers, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China.
| | - Jinhua Li
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xiaobing Du
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Chenggang Su
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| | - Xingguo Zhang
- Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, College of Horticulture and Landscape Architecture, Southwest University, No. 2 Tiansheng Road, Beibei, Chongqing 400715, China.
| |
Collapse
|
27
|
Kushwaha A, Rani R, Kumar S, Gautam A. Heavy metal detoxification and tolerance mechanisms in plants: Implications for phytoremediation. ENVIRONMENTAL REVIEWS 2016. [PMID: 0 DOI: 10.1139/er-2015-0010] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Heavy metals, such as cobalt, copper, manganese, molybdenum, and zinc, are essential in trace amounts for growth by plants and other living organisms. However, in excessive amounts these heavy metals have deleterious effects. Like other organisms, plants possess a variety of detoxification mechanisms to counter the harmful effects of heavy metals. These include the restriction of heavy metals by mycorrhizal association, binding with plant cell wall and root excretions, metal efflux from the plasma membrane, metal chelation by phytochelatins and metallothioneins, and compartmentalization within the vacuole. Phytoremediation is an emerging technology that uses plants and their associated rhizospheric microorganisms to remove pollutants from contaminated sites. This technology is inexpensive, efficient, and ecofriendly. This review focuses on potential cellular and molecular adaptations by plants that are necessary to tolerate heavy metal stress.
Collapse
Affiliation(s)
- Anamika Kushwaha
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
| | - Radha Rani
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
| | - Sanjay Kumar
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
| | - Aishvarya Gautam
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Teliyar Ganj, Allahabad
| |
Collapse
|
28
|
Wenzel WW, Adriano DC, Salt D, Smith R. Phytoremediation: A Plant-Microbe-Based Remediation System. AGRONOMY MONOGRAPHS 2015. [DOI: 10.2134/agronmonogr37.c18] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Walter W. Wenzel
- Institute of Soil Science; Universität für Bodenkultur; Vienna Austria
| | - Domy C. Adriano
- Savannah River Ecology Laboratory; University of Georgia; Aiken South Carolina
| | - David Salt
- Chemistry Department; Northern Arizona University; Flagstaff Arizona
| | - Robert Smith
- AgBiotech Center; Rutgers University; New Brunswick New Jersey
| |
Collapse
|
29
|
Jin S, Sun D, Wang J, Li Y, Wang X, Liu S. Expression of the rgMT gene, encoding for a rice metallothionein-like protein in Saccharomyces cerevisiae and Arabidopsis thaliana. J Genet 2015; 93:709-18. [PMID: 25572229 DOI: 10.1007/s12041-014-0430-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Metallothioneins (MTs) are cysteine-rich proteins of low molecular weight with many attributed functions, such as providing protection against metal toxicity, being involved in regulation of metal ions uptake that can impact plant physiology and providing protection against oxidative stress. However, the precise function of the metallothionein-like proteins such as the one coded for rgMT gene isolated from rice (Oryza sativa L.) is not completely understood. The whole genome analysis of rice (O. sativa) showed that the rgMT gene is homologue to the Os11g47809 on chromosome 11 of O. sativa sp. japonica genome. This study used the rgMT coding sequence to create transgenic lines to investigate the subcellular localization of the protein, as well as the impact of gene expression in yeast (Saccharomyces cerevisiae) and Arabidopsis thaliana under heavy metal ion, salt and oxidative stresses. The results indicate that the rgMT gene was expressed in the cytoplasm of transgenic cells. Yeast cells transgenic for rgMT showed vigorous growth compared to the nontransgenic controls when exposed to 7 mM CuCl2, 10 mM FeCl2, 1 M NaCl, 24 mM NaHCO3 and 3.2 mM H2O2, but there was no significant difference for other stresses tested. Similarly, Arabidopsis transgenic for rgMT displayed significantly improved seed germination rates over that of the control when the seeds were stressed with 100 μM CuCl2 or 1 mM H2O2. Increased biomass was observed in the presence of 100 μM CuCl2, 220 μM FeCl2, 3 mM Na2CO3, 5 mM NaHCO3 or 1 mM H2O2. These results indicate that the expression of the rice rgMT gene in transgenic yeast and Arabidopsis is implicated in improving their tolerance for certain salt and peroxide stressors.
Collapse
Affiliation(s)
- Shumei Jin
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration in Oil Field (SAVER),Ministry of Education, Alkali Soil Natural Environmental Science Center (ASNESC), Northeast Forestry University, Harbin 150040, People's Republic of China.
| | | | | | | | | | | |
Collapse
|
30
|
Yang M, Zhang F, Wang F, Dong Z, Cao Q, Chen M. Characterization of a Type 1 Metallothionein Gene from the Stresses-Tolerant Plant Ziziphus jujuba. Int J Mol Sci 2015; 16:16750-62. [PMID: 26213917 PMCID: PMC4581167 DOI: 10.3390/ijms160816750] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/07/2015] [Accepted: 07/17/2015] [Indexed: 11/16/2022] Open
Abstract
Plant metallothioneins (MTs) are a family of low molecular weight, cysteine-rich, and metal-binding proteins, which play an important role in the detoxification of heavy metal ions, osmotic stresses, and hormone treatment. Sequence analysis revealed that the open-reading frame (ORF) of ZjMT was 225 bp, which encodes a protein composed of 75 amino acid residues with a calculated molecular mass of 7.376 kDa and a predicated isoelectric point (pI) of 4.83. ZjMT belongs to the type I MT, which consists of two highly conserved cysteine-rich terminal domains linked by a cysteine free region. Our studies showed that ZjMT was primarily localized in the cytoplasm and the nucleus of cells and ZjMT expression was up-regulated by NaCl, CdCl2 and polyethylene glycol (PEG) treatments. Constitutive expression of ZjMT in wild type Arabidopsis plants enhanced their tolerance to NaCl stress during the germination stage. Compared with the wild type, transgenic plants accumulate more Cd2+ in root, but less in leaf, suggesting that ZjMT may have a function in Cd2+ retension in roots and, therefore, decrease the toxicity of Cd2+.
Collapse
Affiliation(s)
- Mingxia Yang
- The Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China.
- Pomology Institute of Shanxi Academy of Agricultural Sciences, Taigu 030815, China.
| | - Fan Zhang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Fan Wang
- Jinguo Museum of Shanxi Province, Linfen 043400, China.
| | - Zhigang Dong
- Pomology Institute of Shanxi Academy of Agricultural Sciences, Taigu 030815, China.
| | - Qiufen Cao
- The Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China.
- Biotechnology Research Center of Shanxi Academy of Agricultural Sciences, Taiyuan 030031, China.
| | - Mingchang Chen
- The Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China.
- Department of Agriculture Shanxi Province, Taiyuan 030002, China.
| |
Collapse
|
31
|
Bashir H, Ibrahim MM, Bagheri R, Ahmad J, Arif IA, Baig MA, Qureshi MI. Influence of sulfur and cadmium on antioxidants, phytochelatins and growth in Indian mustard. AOB PLANTS 2015; 7:plv001. [PMID: 25587194 PMCID: PMC4323519 DOI: 10.1093/aobpla/plv001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 12/16/2014] [Indexed: 05/20/2023]
Abstract
Soils in many parts of the world are contaminated with heavy metals, leading to multiple, deleterious effects on plants and threats to world food production efficiency. Cadmium (Cd) is one such metal, being toxic at relatively low concentrations as it is readily absorbed and translocated in plants. Sulfur-rich compounds are critical to the impact of Cd toxicity, enabling plants to increase their cellular defence and/or sequester Cd into vacuoles mediated by phytochelatins (PCs). The influence of sulfur on Cd-induced stress was studied in the hyperaccumulator plant Indian mustard (Brassica juncea) using two sulfur concentrations (+S, 300 µM [Formula: see text] and S-deficient -S, [Formula: see text]) with and without the addition of Cd (100 µM CdCl2) at two different time intervals (7 and 14 days after treatment). Compared with control plants (+S/-Cd), levels of oxidative stress were higher in S-deficient (-S/-Cd) plants, and greatest in S-deficient Cd-treated (-S/+Cd) plants. However, additional S (+S/+Cd) helped plants cope with oxidative stress. Superoxide dismutase emerged as a key player against Cd stress under both -S and +S conditions. The activity of ascorbate peroxidase, glutathione reductase and catalase declined in Cd-treated and S-deficient plants, but was up-regulated in the presence of sulfur. Sulfur deficiency mediated a decrease in ascorbate and glutathione (GSH) content but changes in ascorbate (reduced : oxidized) and GSH (reduced : oxidized) ratios were alleviated by sulfur. Our data clearly indicate that a sulfur pool is needed for synthesis of GSH, non-protein thiols and PCs and is also important for growth. Sulfur-based defence mechanisms and the cellular antioxidant pathway, which are critical for tolerance and growth, collapsed as a result of a decline in the sulfur pool.
Collapse
Affiliation(s)
- Humayra Bashir
- Proteomics and Bioinformatics Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
| | - Mohamed M Ibrahim
- Department of Botany and Microbiology, Science College, King Saud University, PO Box 2455, Riyadh, Saudi Arabia Department of Botany and Microbiology, Faculty of Science, Alexandria University, PO Box 21511, Alexandria, Egypt
| | - Rita Bagheri
- Proteomics and Bioinformatics Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
| | - Javed Ahmad
- Proteomics and Bioinformatics Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
| | - Ibrahim A Arif
- Department of Botany and Microbiology, Science College, King Saud University, PO Box 2455, Riyadh, Saudi Arabia Department of Botany and Microbiology, Faculty of Science, Alexandria University, PO Box 21511, Alexandria, Egypt
| | - M Affan Baig
- Proteomics and Bioinformatics Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
| | - M Irfan Qureshi
- Proteomics and Bioinformatics Lab, Department of Biotechnology, Jamia Millia Islamia, New Delhi 110025, India
| |
Collapse
|
32
|
Zribi K, Nouairi I, Slama I, Talbi-Zribi O, Mhadhbi H. Medicago sativa--Sinorhizobium meliloti Symbiosis Promotes the Bioaccumulation of Zinc in Nodulated Roots. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2015; 17:49-55. [PMID: 25174424 DOI: 10.1080/15226514.2013.828017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study we investigated effects of Zn supply on germination, growth, inorganic solutes (Zn, Ca, Fe, and Mg) partitioning and nodulation of Medicago sativa This plant was cultivated with and without Zn (2 mM). Treatments were plants without (control) and with Zn tolerant strain (S532), Zn intolerant strain (S112) and 2 mM urea nitrogen fertilisation. Results showed that M. sativa germinates at rates of 50% at 2 mM Zn. For plants given nitrogen fertilisation, Zn increased plant biomass production. When grown with symbionts, Zn supply had no effect on nodulation. Moreover, plants with S112 showed a decrease of shoot and roots biomasses. However, in symbiosis with S532, an increase of roots biomass was observed. Plants in symbiosis with S. meliloti accumulated more Zn in their roots than nitrogen fertilised plants. Zn supply results in an increase of Ca concentration in roots of fertilised nitrogen plants. However, under Zn supply, Fe concentration decreased in roots and increased in nodules of plants with S112. Zn supply showed contrasting effects on Mg concentrations for plants with nitrogen fertilisation (increase) and plants with S112 (decrease). The capacity of M. sativa to accumulate Zn in their nodulated roots encouraged its use in phytostabilisation processes.
Collapse
Affiliation(s)
- Kais Zribi
- a Laboratory of Legumes , Centre of Biotechnology of Borj Cedria , Hammam , Tunisia
| | | | | | | | | |
Collapse
|
33
|
Isolation, molecular characterization and functional analysis of OeMT2, an olive metallothionein with a bioremediation potential. Mol Genet Genomics 2014; 290:187-99. [PMID: 25204791 DOI: 10.1007/s00438-014-0908-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 08/23/2014] [Indexed: 10/24/2022]
Abstract
Metallothioneins are essential in plants for metal detoxification in addition to their other roles in plant life cycle. This study reports the characterization of an olive (Olea europaea L. cv. Ayvalik) metallothionein with respect to molecular and functional properties. A cDNA encoding a type 2 metallothionein from olive was isolated from a leaf cDNA library, characterized and named OeMT2 after its molecular and functional properties. OeMT2 was expressed in Escherichia coli, and a single protein band was confirmed by protein gel blot analysis. Metal tolerance ability of bacterial cells expressing OeMT2 was determined against 0.2 mM CdCl2, 0.4 mM CdCl2 and 1 mM CuSO4 in the growth medium. Metal ion contents of bacterial cells expressing OeMT2 were measured by ICP. Metal tolerance assays and ICP measurements suggested that OeMT2 effectively binds Cu and Cd. Molecular analysis of OeMT2 revealed two introns, three exons, a short 3' UTR and a long 5' UTR. Comparing the genomic sequences from 14 olive cultivars revealed OeMT2 had both intron and exon polymorphisms dividing the cultivars into three groups. Real-time PCR analysis demonstrated that OeMT2 expresses more or less the same amounts in all tissues of the olive tree examined. The genomic copy number of OeMT2 was also determined employing real-time PCR which suggested a single copy gene in the olive genome while three other MT2 members were determined from the draft olive genome sequences of Ayvalik cultivar and that of wild olive. This is the first report on molecular and functional characterization of an olive metallothionein and shows that OeMT2 expressed in E. coli has the capability of effectively binding toxic heavy metals. This may suggest that OeMT2 plays an important role in metal homeostasis in addition to a good potential for environmental and industrial usage.
Collapse
|
34
|
Kim SH, Jeong JC, Ahn YO, Lee HS, Kwak SS. Differential responses of three sweetpotato metallothionein genes to abiotic stress and heavy metals. Mol Biol Rep 2014; 41:6957-66. [PMID: 25030835 DOI: 10.1007/s11033-014-3582-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 07/01/2014] [Indexed: 11/30/2022]
Abstract
Metallothioneins (MTs) are cysteine-rich, low molecular weight, metal-binding proteins that are widely distributed in living organisms. Plants produce metal-chelating proteins such as MTs to overcome the toxic effects of heavy metals. We cloned three MT genes from sweetpotato leaves [Ipomoea batatas (L.) Lam.]. The three IbMT genes were classified according to their cysteine residue alignment into type 1 (IbMT1), type 2 (IbMT2), and type 3 (IbMT3). IbMT1 was the most abundantly transcribed MT. It was predominantly expressed in leaves, roots, and callus. IbMT2 transcript was detected only in stems and fibrous roots, whereas IbMT3 was strongly expressed in leaves and stems. The IbMT expression profiles were investigated in plants exposed to heavy metals and abiotic stresses. The levels of IbMT1 expression were strongly elevated in response to Cd and Fe, and moderately higher in response to Cu. The IbMT3 expression pattern in response to heavy metals was similar to that of IbMT1. Exposure to abiotic stresses such as methyl viologen (MV; paraquat), NaCl, polyethylene glycol (PEG), and H2O2 up-regulated IbMT expression; IbMT1 responded strongly to MV and NaCl, whereas IbMT3 was induced by low temperature and PEG. Transgenic Escherichia coli overexpressing IbMT1 protein exhibited results suggest that IbMT could be a useful tool for engineering plants with enhanced tolerance to environmental stresses and heavy metals.
Collapse
Affiliation(s)
- Sun Ha Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahangno, Daejeon, 305-806, Korea
| | | | | | | | | |
Collapse
|
35
|
Gu CS, Liu LQ, Zhao YH, Deng YM, Zhu XD, Huang SZ. Overexpression of Iris. lactea var. chinensis metallothionein llMT2a enhances cadmium tolerance in Arabidopsis thaliana. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2014; 105:22-28. [PMID: 24780229 DOI: 10.1016/j.ecoenv.2014.04.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 03/31/2014] [Accepted: 04/01/2014] [Indexed: 06/03/2023]
Abstract
Metallothioneins (MTs) are cysteine-rich, low molecular weight, heavy metal-binding protein molecules. Here, a full-length cDNA homologue of MT2a (type 2 metallothionein) was isolated from the cadmium-tolerant species Iris. lactea var. chinensis (I. lactea var. chinensis). Expression of IlMT2a in I. lactea var. chinensis roots and leaves was up-regulated in response to cadmium stress. When the gene was constitutively expressed in Arabidopsis thaliana (A. thaliana), root length of transgenic lines was longer than that of wild-type under 50μM or 100μM cadmium stress. However, there was no difference of cadmium absorption between wild-type and trangenic lines. Histochemical staining by 3,3-diaminobenzidine (DAB) and nitroblue tetrazoliu (NBT) clearly demonstrated that transgenic lines accumulated remarkably less H2O2 and O2(-) than wild-type. Together, IlMT2a may be a promising gene for the cadmium tolerance improvement.
Collapse
Affiliation(s)
- Chun-Sun Gu
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China
| | - Liang-qin Liu
- College of Horticulture, Nanjing Agricultural University Nanjing 210014, China
| | - Yan-Hai Zhao
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China
| | - Yan-ming Deng
- Institute of Agrobiotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Xu-dong Zhu
- College of Horticulture, Nanjing Agricultural University Nanjing 210014, China
| | - Su-Zhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Science, Nanjing 210014, China.
| |
Collapse
|
36
|
Nath S, Panda P, Mishra S, Dey M, Choudhury S, Sahoo L, Panda SK. Arsenic stress in rice: redox consequences and regulation by iron. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2014; 80:203-10. [PMID: 24811675 DOI: 10.1016/j.plaphy.2014.04.013] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 04/14/2014] [Indexed: 05/20/2023]
Abstract
Arsenic (As) contamination is a serious hazard to human health and agriculture. It has emerged as an important threat for rice cultivation mainly in South Asian countries. In this study, we investigated the effect of iron (Fe) supplementation on arsenic (As(V)) induced oxidative stress responses in rice (Oryza sativa L.). Rice seedlings treated with As(V) for 24 and 48 h in presence or absence of 2.5 mM Fe after which the root and shoot tissues were harvested for analysis. The results indicate significant (p ≤ 0.05) reduction in root and shoot length/dry biomass. Supplementation of Fe showed improved growth responses under stress as compared to As(V) alone. The scanning electron microscopy (SEM) analysis of roots under As(V) treatment for 48 h showed major alterations in root structure and integrity, although no noticeable changes were observed in Fe - supplemented seedlings. Significantly high (p ≤ 0.05) accumulation of As(V) was observed in root and shoot after 24 and 48 h of stress. However, under Fe - supplementation As accumulation in root and shoot were considerably low after 24 and 48 h of As(V) treatment. The hydrogen peroxide (H2O2) and malondialdehyde (MDA) content in both root and shoot increased significantly (p ≤ 0.05) after 24 and 48 h of As(V) treatment. In Fe - supplemented seedlings, the levels of H2O2 and MDA were considerably low as compared to As(V) alone. Ascorbate (AsA) and glutathione (GSH) levels also increased significantly (p ≤ 0.05) under As(V) stress as compared to control and Fe-supplemented seedlings. Activities of catalase (CAT) and superoxide dismutase (SOD) were significantly (p ≤ 0.05) high after 24 and 48 h of As(V) treatment as compared to Fe-supplemented seedlings. The gene expression analysis revealed up-regulation of metallothionein (MT1, MT2) and nodulin 26-like intrinsic protein (NIP2;1) genes after 5d of As treatment, while their expressions were repressed under Fe-supplementation. Our results indicate that Fe regulates oxidative stress and promotes growth under As stress.
Collapse
Affiliation(s)
- Shwetosmita Nath
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Piyalee Panda
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| | - Sagarika Mishra
- Department of Biotechnology, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Mohitosh Dey
- Department of Biotechnology, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Shuvasish Choudhury
- Central Instrumentation Laboratory, Assam University, Silchar 788 011, India.
| | - Lingaraj Sahoo
- Department of Biotechnology, Indian Institute of Technology, Guwahati 781 039, Assam, India
| | - Sanjib Kumar Panda
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar 788 011, India
| |
Collapse
|
37
|
Zhou B, Yao W, Wang S, Wang X, Jiang T. The metallothionein gene, TaMT3, from Tamarix androssowii confers Cd2+ tolerance in tobacco. Int J Mol Sci 2014; 15:10398-409. [PMID: 24918294 PMCID: PMC4100158 DOI: 10.3390/ijms150610398] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/16/2014] [Accepted: 05/16/2014] [Indexed: 11/18/2022] Open
Abstract
Cadmium (Cd) is a nonessential microelement and low concentration Cd2+ has strong toxicity to plant growth. Plant metallothioneins, a class of low molecular, cystein(Cys)-rich and heavy-metal binding proteins, play an important role in both metal chaperoning and scavenging of reactive oxygen species (ROS) with their large number of cysteine residues and therefore, protect plants from oxidative damage. In this study, a metallothionein gene, TaMT3, isolated from Tamarix androssowii was transformed into tobacco (Nicotiana tobacum) through Agrobacterium-mediated leaf disc method, and correctly expressed under the control of 35S promoter. Under Cd2+ stress, the transgenic tobacco showed significant increases of superoxide dismutase (SOD) activity and chlorophyll concentration, but decreases of peroxidase (POD) activity and malondialdehyde (MDA) accumulation when compared to the non-transgenic tobacco. Vigorous growth of transgenic tobacco was observed at the early development stages, resulting in plant height and fresh weight were significantly larger than those of the non-transgenic tobacco under Cd2+ stress. These results demonstrated that the expression of the exogenous TaMT3 gene increased the ability of ROS cleaning-up, indicating a stronger tolerance to Cd2+ stress.
Collapse
Affiliation(s)
- Boru Zhou
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| | - Wenjing Yao
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| | - Shengji Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| | - Xinwang Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| | - Tingbo Jiang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China.
| |
Collapse
|
38
|
Chyan CL, Lee TTT, Liu CP, Yang YC, Tzen JTC, Chou WM. Cloning and Expression of a Seed-Specific Metallothionein-Like Protein from Sesame. Biosci Biotechnol Biochem 2014; 69:2319-25. [PMID: 16377889 DOI: 10.1271/bbb.69.2319] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A cDNA clone, SiMT encoding an Ec type of metallothionein (MT)-like protein, was isolated from maturing seeds of sesame (Sesamum indicum L.), and its deduced protein sequence shared 47-65% similarity to other known Ec type of MT-like proteins with three highly conserved cysteine-rich segments. The transcript of SiMT was exclusively accumulated in maturing seeds from two weeks after flowering to the end of seed maturation. The results of a southern blot analysis suggested that one SiMT and one SiMT-like gene were present in the sesame genome. Recombinant SiMT fused with glutathione-S-transferase (GST) was over-expressed in Escherichia coli, and purified to homogeneity by affinity chromatography. Recombinant SiMT released from GST was harvested after factor Xa cleavage. Migration of the recombinant SiMT during SDS-PAGE was accelerated when its binding metal ions were depleted by EDTA. The metal-binding capability of recombinant SiMT was measured by inductively-coupled plasma atomic emission spectrometry. Our results show that the recombinant SiMT could trap zinc or copper ions, but not manganese ions, with a stoichiometric ratio (metal ion/SiMT) of approximately 2.
Collapse
MESH Headings
- Amino Acid Sequence
- Blotting, Northern
- Blotting, Southern
- Blotting, Western
- Cloning, Molecular
- DNA, Complementary/biosynthesis
- DNA, Complementary/genetics
- DNA, Plant/biosynthesis
- DNA, Plant/genetics
- Electrophoresis, Polyacrylamide Gel
- Escherichia coli/metabolism
- Gene Expression Regulation, Plant/genetics
- Genes, Plant/genetics
- Glutathione Transferase/genetics
- Glutathione Transferase/metabolism
- Metallothionein/biosynthesis
- Metallothionein/chemistry
- Metals/metabolism
- Molecular Sequence Data
- Protein Binding
- RNA, Plant/biosynthesis
- RNA, Plant/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Seeds/chemistry
- Seeds/metabolism
- Sesamum/chemistry
- Sesamum/genetics
Collapse
Affiliation(s)
- Chia-Lin Chyan
- Department of Chemistry, National Dong Hwa University, Hwalien, Taiwan
| | | | | | | | | | | |
Collapse
|
39
|
Nedkovska M, Atanassov AI. Metallothionein Genes and Expression for Heavy Metal Resistance. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.1998.10818980] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
40
|
The Cadmium Phytoextraction Efficiency of ScMTII Gene Bearing Transgenic Tobacco Plant. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.2478/v10133-010-0063-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
41
|
Tonkovska G, Atanassov A, Atanassov I. The Promoter Region of Arabidopsis MetallothioneinMT2aGene is Strongly Induced by Treatment with Cu II, ZNII and CD II Ions in TransgenicNicotiana BenthamianaPlants. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2003.10817071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
42
|
Nezhad RM, Shahpiri A, Mirlohi A. Discrimination between two rice metallothionein isoforms belonging to type 1 and type 4 in metal-binding ability. Biotechnol Appl Biochem 2014; 60:275-82. [PMID: 23782215 DOI: 10.1002/bab.1078] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Accepted: 12/12/2012] [Indexed: 10/26/2022]
Abstract
Metallothioneins (MTs) are a superfamily of low-molecular-weight, cysteine (Cys)-rich proteins that are believed to play important roles in protection against metal toxicity and oxidative stress. Plants have several MT isoforms, which are classified into four types based on the arrangement of Cys residues. In this study, two rice (Oryza sativa) MT isoforms, OsMTI-1b and OsMTII-1a from type 1 and type 4, respectively, were heterologously expressed in Escherichia coli as carboxy-terminal extensions of glutathione-S-transferase (GST). Transformed cells expressing GST-OsMTI-1b showed increased tolerance to Ni(2+) , Cd(2+) , and Zn(2+) and accumulated more metal ions compared with cells expressing GST alone. However, heterologous expression of GST-OsMTII-1a had no significant effects on metal tolerance or ion accumulation. The UV absorption spectra and competitive reactions of in vitro Cd-incubated proteins with 5-5'-dithiobis(2-nitrobenzoic) acid revealed that GST-OsMTI-1b, but not GST-OsMTII-1a, is able to form Cd-thiolate clusters. Furthermore, heterologous expression of both GST-OsMTI-1b and GST-OsMTII-1a conferred H2 O2 tolerance to E. coli cells. Taken together, the results presented here show that two different rice MT isoforms belonging to type 1 and type 4 differ in Ni(2+) , Cd(2+) , and Zn(2+) binding abilities, but they may have overlapping function in protection of cells against oxidative stress.
Collapse
Affiliation(s)
- Rezvan Mohammadi Nezhad
- Department of Agricultural Biotechnology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran
| | | | | |
Collapse
|
43
|
Mirza N, Mahmood Q, Maroof Shah M, Pervez A, Sultan S. Plants as useful vectors to reduce environmental toxic arsenic content. ScientificWorldJournal 2014; 2014:921581. [PMID: 24526924 PMCID: PMC3913097 DOI: 10.1155/2014/921581] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Accepted: 10/23/2013] [Indexed: 11/17/2022] Open
Abstract
Arsenic (As) toxicity in soil and water is an increasing menace around the globe. Its concentration both in soil and environment is due to natural and anthropogenic activities. Rising arsenic concentrations in groundwater is alarming due to the health risks to plants, animals, and human beings. Anthropogenic As contamination of soil may result from mining, milling, and smelting of copper, lead, zinc sulfide ores, hide tanning waste, dyes, chemical weapons, electroplating, gas exhaust, application of municipal sludge on land, combustion of fossil fuels, As additives to livestock feed, coal fly ash, and use of arsenical pesticides in agricultural sector. Phytoremediation can be viewed as biological, solar-driven, pump-and-treat system with an extensive, self-extending uptake network (the root system) that enhances the natural ecosystems for subsequent productive use. The present review presents recent scientific developments regarding phytoremediation of arsenic contaminated environments and its possible detoxification mechanisms in plants.
Collapse
Affiliation(s)
- Nosheen Mirza
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Qaisar Mahmood
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Mohammad Maroof Shah
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Arshid Pervez
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Sikander Sultan
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quaid-i-Azam Campus, Lahore 54590, Pakistan
| |
Collapse
|
44
|
Gupta OP, Sharma P, Gupta RK, Sharma I. MicroRNA mediated regulation of metal toxicity in plants: present status and future perspectives. PLANT MOLECULAR BIOLOGY 2014; 84:1-18. [PMID: 23975146 DOI: 10.1007/s11103-013-0120-6] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 08/03/2013] [Indexed: 05/23/2023]
Abstract
The human population is increasing at an alarming rate, whereas heavy metals (HMs) pollution is mounting serious environmental problem, which could lead to serious concern about the future sufficiency of global food production. Some HMs such as Mn, Cu, and Fe, at lower concentration serves as an essential vital component of plant cell as they are crucial in various enzyme catalyzed biochemical reactions. At higher concentration, a vast variety of HMs such as Mn, Cu, Cd, Fe, Hg, Al and As, impose toxic reaction in the plant system which greatly affect the crop yield. Recently, microRNAs (miRNAs) that are small class of non-coding riboregulator have emerged as central regulator of numerous abiotic stresses including HMs. Increasing reports indicate that plants have evolved specialized inbuilt mechanism viz. signal transduction, translocation and sequestration to counteract the toxic response of HMs. Combining computational and wet laboratory approaches have produced sufficient evidences concerning active involvement of miRNAs during HMs toxicity response by regulating various transcription factors and protein coding genes involved in plant growth and development. However, the direct role of miRNA in controlling various signaling molecules, transporters and chelating agents of HM metabolism is poorly understood. This review focuses on the latest progress made in the area of direct involvement of miRNAs in signaling, translocation and sequestration as well as recently added miRNAs in response to different HMs in plants.
Collapse
Affiliation(s)
- O P Gupta
- Quality and Basic Sciences, Directorate of Wheat Research, Karnal, 132001, India,
| | | | | | | |
Collapse
|
45
|
Mudalkar S, Golla R, Sengupta D, Ghatty S, Reddy AR. Molecular cloning and characterisation of metallothionein type 2a gene from Jatropha curcas L., a promising biofuel plant. Mol Biol Rep 2013; 41:113-24. [DOI: 10.1007/s11033-013-2843-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 10/26/2013] [Indexed: 11/28/2022]
|
46
|
Teixeira J, Ferraz P, Almeida A, Verde N, Fidalgo F. Metallothionein multigene family expression is differentially affected by
C
hromium (
III
) and (
VI
) in
S
olanum nigrum
L
. plants. Food Energy Secur 2013. [DOI: 10.1002/fes3.26] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Jorge Teixeira
- BioFIG ‐ Center for Biodiversity, Functional & Integrative Genomics Porto Portugal
- Departamento de Biologia Faculdade de Ciências, Universidade do Porto Ed. FC4, Rua do Campo Alegre, s/n 4169‐007 Porto Portugal
| | - Pedro Ferraz
- BioFIG ‐ Center for Biodiversity, Functional & Integrative Genomics Porto Portugal
- Departamento de Biologia Faculdade de Ciências, Universidade do Porto Ed. FC4, Rua do Campo Alegre, s/n 4169‐007 Porto Portugal
| | - Agostinho Almeida
- REQUIMTE Departamento de Ciências Químicas Faculdade de Farmácia, Universidade do Porto Rua de Jorge Viterbo Ferreira no. 228 4050‐313 Porto Portugal
| | - Nuno Verde
- BioFIG ‐ Center for Biodiversity, Functional & Integrative Genomics Porto Portugal
- Departamento de Biologia Faculdade de Ciências, Universidade do Porto Ed. FC4, Rua do Campo Alegre, s/n 4169‐007 Porto Portugal
| | - Fernanda Fidalgo
- BioFIG ‐ Center for Biodiversity, Functional & Integrative Genomics Porto Portugal
- Departamento de Biologia Faculdade de Ciências, Universidade do Porto Ed. FC4, Rua do Campo Alegre, s/n 4169‐007 Porto Portugal
| |
Collapse
|
47
|
Wan X, Schicht O, Freisinger E. Copper(I) Coordination by Two Plant Metallothioneins. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
48
|
Dündar E, Suakar O, Unver T, Dagdelen A. Isolation and expression analysis of cDNAs that are associated with alternate bearing in Olea europaea L. cv. Ayvalık. BMC Genomics 2013; 14:219. [PMID: 23552171 PMCID: PMC3637518 DOI: 10.1186/1471-2164-14-219] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 03/22/2013] [Indexed: 11/10/2022] Open
Abstract
Background Olive cDNA libraries to isolate candidate genes that can help enlightening the molecular mechanism of periodicity and / or fruit production were constructed and analyzed. For this purpose, cDNA libraries from the leaves of trees in “on year” and in “off year” in July (when fruits start to appear) and in November (harvest time) were constructed. Randomly selected 100 positive clones from each library were analyzed with respect to sequence and size. A fruit-flesh cDNA library was also constructed and characterized to confirm the reliability of each library’s temporal and spatial properties. Results Quantitative real-time RT-PCR (qRT-PCR) analyses of the cDNA libraries confirmed cDNA molecules that are associated with different developmental stages (e. g. “on year” leaves in July, “off year” leaves in July, leaves in November) and fruits. Hence, a number of candidate cDNAs associated with “on year” and “off year” were isolated. Comparison of the detected cDNAs to the current EST database of GenBank along with other non - redundant databases of NCBI revealed homologs of previously described genes along with several unknown cDNAs. Of around 500 screened cDNAs, 48 cDNA elements were obtained after eliminating ribosomal RNA sequences. These independent transcripts were analyzed using BLAST searches (cutoff E-value of 1.0E-5) against the KEGG and GenBank nucleotide databases and 37 putative transcripts corresponding to known gene functions were annotated with gene names and Gene Ontology (GO) terms. Transcripts in the biological process were found to be related with metabolic process (27%), cellular process (23%), response to stimulus (17%), localization process (8.5%), multicellular organismal process (6.25%), developmental process (6.25%) and reproduction (4.2%). Conclusions A putative P450 monooxigenase expressed fivefold more in the “on year” than that of “off year” leaves in July. Two putative dehydrins expressed significantly more in “on year” leaves than that of “off year” leaves in November. Homologs of UDP – glucose epimerase, acyl - CoA binding protein, triose phosphate isomerase and a putative nuclear core anchor protein were significant in fruits only, while a homolog of an embryo binding protein / small GTPase regulator was detected in “on year” leaves only. One of the two unknown cDNAs was specific to leaves in July while the other was detected in all of the libraries except fruits. KEGG pathway analyses for the obtained sequences correlated with essential metabolisms such as galactose metabolism, amino sugar and nucleotide sugar metabolisms and photosynthesis. Detailed analysis of the results presents candidate cDNAs that can be used to dissect further the genetic basis of fruit production and / or alternate bearing which causes significant economical loss for olive growers.
Collapse
Affiliation(s)
- Ekrem Dündar
- Fen Edebiyat Fakültesi, Biyoloji Bölümü, Balıkesir Üniversitesi, Balıkesir, Turkey.
| | | | | | | |
Collapse
|
49
|
Eckhardt S, Brunetto PS, Gagnon J, Priebe M, Giese B, Fromm KM. Nanobio silver: its interactions with peptides and bacteria, and its uses in medicine. Chem Rev 2013; 113:4708-54. [PMID: 23488929 DOI: 10.1021/cr300288v] [Citation(s) in RCA: 504] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Sonja Eckhardt
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, 1700 Fribourg, Switzerland.
| | | | | | | | | | | |
Collapse
|
50
|
Cozza R, Bruno L, Bitonti MB. Expression pattern of a type-2 metallothionein gene in a wild population of the psammophyte Silene nicaeensis. PROTOPLASMA 2013; 250:381-389. [PMID: 22688806 DOI: 10.1007/s00709-012-0425-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Accepted: 05/25/2012] [Indexed: 06/01/2023]
Abstract
Silene nicaeensis is a wild Mediterranean grass often restricted to sandy sea shore and exhibiting an excellent tolerance to drought and salinity. Within Silene genus, several heavy metal-tolerant ecotypes have been identified, but information on molecular basis of such metal tolerance is still limited. Conceivably, salt-tolerant plants may represent a powerful tool for the remediation of heavy metal contaminated sites in saline environment. Here, a gene encoding a metallothionein protein was isolated from S. nicaeensis. Sequence analysis identified the motifs characteristic of type II metallothionein and designated as SnMT2. SnMT2 expression was investigated in plants collected from two sites differing in Metal Pollution Index (MPI). SnMT2 expression by polymerase chain reaction-based semi-quantitative transcript analysis showed a high accumulation in the leaves; in situ hybridization showed a steady localization of SnMT2 mRNA in the vascular bundle and in proliferating tissues. Moreover, an increase of SnMT2 was observed in the root of plants collected from area with higher MPI. The putative role of SnMT2 in metal tolerance is discussed.
Collapse
Affiliation(s)
- Radiana Cozza
- Department of Ecology, University of Calabria, 87030 Arcavacata di Rende (CS), Italy.
| | | | | |
Collapse
|