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Sunic K, Spanic V. Genetic Biofortification of Winter Wheat with Selenium (Se). PLANTS (BASEL, SWITZERLAND) 2024; 13:1816. [PMID: 38999656 PMCID: PMC11244473 DOI: 10.3390/plants13131816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 06/27/2024] [Accepted: 06/27/2024] [Indexed: 07/14/2024]
Abstract
Wheat is one of the three most important cereals in the world, along with rice and maize. It serves as the primary food and source of energy for about 30-40% of the world's population. However, the low levels of micronutrients in wheat grains can lead to deficiencies of those micronutrients in people whose dietary habits are mostly based on cereals such as wheat. Apart from iron (Fe) and zinc (Zn), a lack of selenium (Se) is also one of the biggest problems in the world. The essentiality of Se has been confirmed for all animals and humans, and the lack of this micronutrient can cause serious health issues. Wheat dominates the world's cereal production, so it is one of the best plants for biofortification. Due to the fact that agronomic biofortification is not an economical or environmentally acceptable approach, genetic improvement of cereals such as wheat for the enhanced content of micronutrients in the grain represents the most efficient biofortification approach.
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Affiliation(s)
| | - Valentina Spanic
- Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno Predgrađe 17, 31000 Osijek, Croatia;
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2
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Gu L, Chen X, Hou Y, Cao Y, Wang H, Zhu B, Du X, Wang H. ZmWRKY30 modulates drought tolerance in maize by influencing myo-inositol and reactive oxygen species homeostasis. PHYSIOLOGIA PLANTARUM 2024; 176:e14423. [PMID: 38945803 DOI: 10.1111/ppl.14423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/11/2024] [Accepted: 05/28/2024] [Indexed: 07/02/2024]
Abstract
Maize (Zea mays L.) is an important food crop with a wide range of uses in both industry and agriculture. Drought stress during its growth cycle can greatly reduce maize crop yield and quality. However, the molecular mechanisms underlying maize responses to drought stress remain unclear. In this work, a WRKY transcription factor-encoding gene, ZmWRKY30, from drought-treated maize leaves was screened out and characterized. ZmWRKY30 gene expression was induced by dehydration treatments. The ZmWRKY30 protein localized to the nucleus and displayed transactivation activity in yeast. Compared with wild-type (WT) plants, Arabidopsis lines overexpressing ZmWRKY30 exhibited a significantly enhanced drought stress tolerance, as evidenced by the improved survival rate, increased antioxidant enzyme activity by superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), elevated proline content, and reduced lipid peroxidation recorded after drought stress treatment. In contrast, the mutator (Mu)-interrupted ZmWRKY30 homozygous mutant (zmwrky30) was more sensitive to drought stress than its null segregant (NS), characterized by the decreased survival rate, reduced antioxidant enzyme activity (SOD, POD, and CAT) and proline content, as well as increased malondialdehyde accumulation. RNA-Seq analysis further revealed that, under drought conditions, the knockout of the ZmWRKY30 gene in maize affected the expression of genes involved in reactive oxygen species (ROS), proline, and myo-inositol metabolism. Meanwhile, the zmwrky30 mutant exhibited significant downregulation of myo-inositol content in leaves under drought stress. Combined, our results suggest that ZmWRKY30 positively regulates maize responses to water scarcity. This work provides potential target genes for the breeding of drought-tolerant maize.
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Affiliation(s)
- Lei Gu
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Xuanxuan Chen
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Yunyan Hou
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Yongyan Cao
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Hongcheng Wang
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Bin Zhu
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Xuye Du
- School of Life Sciences, Guizhou Normal University, Guiyang, China
| | - Huinan Wang
- School of Life Sciences, Guizhou Normal University, Guiyang, China
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3
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Popović AV, Čamagajevac IŠ, Vuković R, Matić M, Velki M, Gupta DK, Galić V, Lončarić Z. Biochemical and molecular responses of the ascorbate-glutathione cycle in wheat seedlings exposed to different forms of selenium. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 208:108460. [PMID: 38447422 DOI: 10.1016/j.plaphy.2024.108460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/30/2024] [Accepted: 02/20/2024] [Indexed: 03/08/2024]
Abstract
Biofortification aims to increase selenium (Se) concentration and bioavailability in edible parts of crops such as wheat (Triticum aestivum L.), resulting in increased concentration of Se in plants and/or soil. Higher Se concentrations can disturb protein structure and consequently influence glutathione (GSH) metabolism in plants which can affect antioxidative and other detoxification pathways. The aim of this study was to elucidate the impact of five different concentrations of selenate and selenite (0.4, 4, 20, 40 and 400 mg kg-1) on the ascorbate-glutathione cycle in wheat shoots and roots and to determine biochemical and molecular tissue-specific responses. Content of investigated metabolites, activities of detoxification enzymes and expression of their genes depended both on the chemical form and concentration of the applied Se, as well as on the type of plant tissue. The most pronounced changes in the expression level of genes involved in GSH metabolism were visible in wheat shoots at the highest concentrations of both forms of Se. Obtained results can serve as a basis for further research on Se toxicity and detoxification mechanisms in wheat. New insights into the Se impact on GSH metabolism could contribute to the further development of biofortification strategies.
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Affiliation(s)
- Ana Vuković Popović
- Department of Biology, Josip Juraj Strossmayer University, 31000, Osijek, Croatia
| | | | - Rosemary Vuković
- Department of Biology, Josip Juraj Strossmayer University, 31000, Osijek, Croatia
| | - Magdalena Matić
- Faculty of Agrobiotechnical Sciences Osijek, 31000, Osijek, Croatia
| | - Mirna Velki
- Department of Biology, Josip Juraj Strossmayer University, 31000, Osijek, Croatia
| | - Dharmendra K Gupta
- Ministry of Environment, Forest and Climate Change, 110003, New Delhi, India
| | - Vlatko Galić
- Agricultural Institute Osijek, Južno predgrađe 17, 31000, Osijek, Croatia
| | - Zdenko Lončarić
- Faculty of Agrobiotechnical Sciences Osijek, 31000, Osijek, Croatia
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Prakash CS, Sunkar R. Generating Mutant for a Stress-Responsive Gene in Rice Using CRISPR-Cas9 System. Methods Mol Biol 2024; 2832:281-290. [PMID: 38869803 DOI: 10.1007/978-1-0716-3973-3_20] [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] [Indexed: 06/14/2024]
Abstract
CRISPR/Cas9 system is one of the most often utilized engineering tools for genome editing in many organisms including crop plants and presents great value in both basic and applied research. This is a preferred method because of its relative simplicity, cost-effectiveness, and reliability. The Cas9 nuclease guided by a short single guide RNA (gRNA) can generate double-strand DNA breaks (DSB) at the specific sites in chromosomal DNA. The DSB site is repaired by error-prone repair methods. During repair, some nucleotides are deleted or added at the target site. Here, we present a simplified protocol for generating mutants in gene of interest in rice using CRISPR/Cas9.
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Affiliation(s)
- Chudamani Sharma Prakash
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, USA
| | - Ramanjulu Sunkar
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, USA.
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5
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Haroun RAH, Abdel-Aziz N, Saad S. The protective effect of N-acetyl cysteine against selenium toxicity and gamma irradiation in rats. Drug Chem Toxicol 2023; 46:482-490. [PMID: 35361025 DOI: 10.1080/01480545.2022.2058010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
N-acetyl cysteine (NAC) is a nutritional supplement and greatly applied as an antioxidant in vivo and in vitro. Therefore, this study aimed to assess the metabolic and antioxidant protective effect of NAC against selenium (Se) toxicity and gamma irradiation in rats by measuring biochemical and molecular parameters. This study was conducted on sixty rats divided into six equal different groups; control, NAC, Rad, Se, Rad + NAC, and Se + NAC groups. Oxidative/nitrosative makers (LPO, NO, and NOS), antioxidants status markers (GSH, GPx, and SOD), liver metabolic markers (LDH, SDH, and ATP), and plasma metabolic markers (Glucose, total cholesterol, and total proteins) were measured using commercial colorimetric kits while plasma corticosterone concentration was measured using commercial ELISA kit. Also, Levels of NR3C1 and Glut-2 genes expression using reverse transcription-quantitative polymerase chain reaction were done. Our results revealed that Se toxicity and gamma irradiation induced significant increases in oxidative/nitrosative stress markers and a significant decrease in antioxidant status markers in the liver and adrenal tissues. Moreover, metabolic disorders were recorded as manifested by elevation of plasma ALT, Albumin, glucose and cholesterol, and decrease in protein levels associated with a significant increase in corticosterone concentration. This was also accompanied by a significant decrease in SDH activity and ATP production in the hepatic tissue. Molecular analysis showed a marked increase in NR3C1 mRNA and decrease in Glut-2 mRNA in liver tissue. However, NAC supplementation attenuated the changes induced by these toxins. Finally, we could conclude that, oral supplementation of NAC can modulate the metabolic disturbances and has protective effects in rats exposed to Se toxicity and gamma irradiation.
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Affiliation(s)
| | - Nahed Abdel-Aziz
- Radiation Biology Department, NCRRT, Atomic Energy Authority, Cairo, Egypt
| | - Soha Saad
- Department of Biochemistry, Ain Shams University, Cairo, Egypt
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6
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Borgo L, Rabêlo FHS, Rossi ML, Santos FHD, Nogueira MLG, Alleoni LRF, Linhares FS, Vangronsveld J, Lavres J. Effect of selenium and soil pH on cadmium phytoextraction by Urochloa decumbens grown in Oxisol. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130771. [PMID: 36696772 DOI: 10.1016/j.jhazmat.2023.130771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/19/2022] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
It has been speculated that selenium (Se) supply can affect cadmium (Cd) 'availability' and increase the Cd tolerance of plants used for phytoextraction, in a pH-dependent process. Thus, we evaluated the interaction Cd-Se and the effects of soil pH in this interaction on plant availability of Cd and phytoextraction efficiency of Urochloa decumbens cv. Basilisk grown in Oxisol. Two soil concentrations of Cd (0.93 and 3.6 mg kg-1) and Se (<0.2 and 1 mg kg-1) and two soil pH (0.01 mol L-1 CaCl2) conditions (4.1 and 5.7) were considered. At both pH, Se supply increased the exchangeable fraction of Cd and decreased the residual Cd fraction. At pH 4.1, the growth of U. decumbens was impaired by Se addition, regardless of Cd exposure. The lower root growth and tillering of U. decumbens exposed to Cd disappeared at pH 5.7 due to uptake of low Se concentrations. Thus, the toxic or beneficial effects of Se on growth of U. decumbens used for Cd phytoextraction depend on the amount of Se assimilated. The Cd phytoextraction efficiency of U. decumbens was not improved by Se supply, regardless of soil pH. Therefore, we cannot recommend the application of Se to increase Cd phytoextraction by this grass.
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Affiliation(s)
- Lucélia Borgo
- University of São Paulo, Center for Nuclear Energy in Agriculture, Piracicaba 13416-000, Brazil.
| | | | - Mônica Lanzoni Rossi
- University of São Paulo, Center for Nuclear Energy in Agriculture, Piracicaba 13416-000, Brazil
| | | | | | | | | | - Jaco Vangronsveld
- Hasselt University, Centre for Environmental Sciences, Diepenbeek B3590, Belgium; Maria Curie-Skłodowska University, Institute of Biological Sciences, Department of Plant Physiology and Biophysics, Lublin 20-033, Poland
| | - José Lavres
- University of São Paulo, Center for Nuclear Energy in Agriculture, Piracicaba 13416-000, Brazil
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Dervisi I, Petropoulos O, Agalou A, Podia V, Papandreou N, Iconomidou VA, Haralampidis K, Roussis A. The SAH7 Homologue of the Allergen Ole e 1 Interacts with the Putative Stress Sensor SBP1 (Selenium-Binding Protein 1) in Arabidopsis thaliana. Int J Mol Sci 2023; 24:3580. [PMID: 36834990 PMCID: PMC9962204 DOI: 10.3390/ijms24043580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
In this study, we focused on a member of the Ole e 1 domain-containing family, AtSAH7, in Arabidopsis thaliana. Our lab reports for the first time on this protein, AtSAH7, that was found to interact with Selenium-binding protein 1 (AtSBP1). We studied by GUS assisted promoter deletion analysis the expression pattern of AtSAH7 and determined that the sequence 1420 bp upstream of the transcription start can act as a minimal promoter inducing expression in vasculature tissues. Moreover, mRNA levels of AtSAH7 were acutely increased under selenite treatment in response to oxidative stress. We confirmed the aforementioned interaction in vivo, in silico and in planta. Following a bimolecular fluorescent complementation approach, we determined that the subcellular localization of the AtSAH7 and the AtSAH7/AtSBP1 interaction occur in the ER. Our results indicate the participation of AtSAH7 in a biochemical network regulated by selenite, possibly associated with responses to ROS production.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Orfeas Petropoulos
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Adamantia Agalou
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides’ Control & Phytopharmacy, Benaki Phytopathological Institute (BPI), 8 Stefanou Delta Street, Kifissia, 14561 Athens, Greece
| | - Varvara Podia
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Nikolaos Papandreou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Vassiliki A. Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece
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Luo F, Zhu D, Sun H, Zou R, Duan W, Liu J, Yan Y. Wheat Selenium-binding protein TaSBP-A enhances cadmium tolerance by decreasing free Cd 2+ and alleviating the oxidative damage and photosynthesis impairment. FRONTIERS IN PLANT SCIENCE 2023; 14:1103241. [PMID: 36824198 PMCID: PMC9941557 DOI: 10.3389/fpls.2023.1103241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Cadmium, one of the toxic heavy metals, robustly impact crop growth and development and food safety. In this study, the mechanisms of wheat (Triticum aestivum L.) selenium-binding protein-A (TaSBP-A) involved in response to Cd stress was fully investigated by overexpression in Arabidopsis and wheat. As a cytoplasm protein, TaSBP-A showed a high expression in plant roots and its expression levels were highly induced by Cd treatment. The overexpression of TaSBP-A enhanced Cd-toleration in yeast, Arabidopsis and wheat. Meanwhile, transgenic Arabidopsis under Cd stress showed a lower H2O2 and malondialdehyde content and a higher photochemical efficiency in the leaf and a reduction of free Cd2+ in the root. Transgenic wheat seedlings of TaSBP exhibited an increment of Cd content in the root, and a reduction Cd content in the leaf under Cd2+ stress. Cd2+ binding assay combined with a thermodynamics survey and secondary structure analysis indicated that the unique CXXC motif in TaSBP was a major Cd-binding site participating in the Cd detoxification. These results suggested that TaSBP-A can enhance the sequestration of free Cd2+ in root and inhibit the Cd transfer from root to leaf, ultimately conferring plant Cd-tolerance via alleviating the oxidative stress and photosynthesis impairment triggered by Cd stress.
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Affiliation(s)
| | | | | | | | | | | | - Yueming Yan
- Beijing Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, College of Life Science, Capital Normal University, Beijing, China
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9
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Chen Q, Yu L, Chao W, Xiang J, Yang X, Ye J, Liao X, Zhou X, Rao S, Cheng S, Cong X, Xiao B, Xu F. Comparative physiological and transcriptome analysis reveals the potential mechanism of selenium accumulation and tolerance to selenate toxicity of Broussonetia papyrifera. TREE PHYSIOLOGY 2022; 42:2578-2595. [PMID: 35899437 DOI: 10.1093/treephys/tpac095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
Broussonetia papyrifera is an important fodder tree that is widely distributed in China. Enhancing the selenium (Se) content in B. papyrifera may help to improve the nutritional value of the feed. In this study, sodium selenite and selenate were foliar applied to investigate the mechanisms of Se tolerance and accumulation in B. papyrifera. The results showed that both Se forms significantly increased the total Se content, and the proportion of organic Se was significantly higher in the sodium selenite treatment than in the control. In addition, the soluble sugar, phenolic acid and flavonoid contents and antioxidant enzyme activities were increased by exogenous Se. The de novo RNA sequencing results showed that 644 and 1804 differentially expressed genes were identified in the selenite and selenate comparison groups, respectively. Pathway enrichment analysis demonstrated that 24 of the 108 pathways were significantly enriched, of which sulfur assimilation genes in the sodium selenite-treated groups were upregulated, whereas Se conjugation and transporter genes, such as SBP1, PCS, GSTs, ABCs and GPX, were significantly induced under selenate treatment. The hub genes identified by weighted-gene co-expression network analysis further confirmed that sulfur assimilation, conjugation and transporter genes might play a vital role in Se assimilation and tolerance. From this, a model of Se metabolism in B. papyrifera was proposed based on the above physiological and RNA sequencing data. This study is the first study to report that B. papyrifera has a strong ability to accumulate and tolerate exogenous Se, thereby providing a foundation for further characterization of the accumulation and tolerance mechanism of B. papyrifera. Our findings can provide technical support for producing Se-enriched fodder.
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Affiliation(s)
- Qiangwen Chen
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Li Yu
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Wei Chao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Juan Xiang
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Xiaoyan Yang
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Jiabao Ye
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Xiaoli Liao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Xian Zhou
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Shen Rao
- National R&D Center for Se-rich Agricultural Products Processing, Wuhan Polytechnic University, Wuhan 430023, Hubei, China
- School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, China
| | - Shuiyuan Cheng
- National R&D Center for Se-rich Agricultural Products Processing, Wuhan Polytechnic University, Wuhan 430023, Hubei, China
- National Selenium Rich Product Quality Supervision and Inspection Center, Enshi 445000, Hubei, China
| | - Xin Cong
- National R&D Center for Se-rich Agricultural Products Processing, Wuhan Polytechnic University, Wuhan 430023, Hubei, China
- Enshi Se-Run Material Engineering Technology Co., Ltd, Enshi, 445000, China
| | - Bo Xiao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
| | - Feng Xu
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, Hubei, China
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10
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Sun C, Guo Q, Zeeshan M, Milham P, Qin S, Ma J, Yang Y, Lai H, Huang J. Dual RNA and 16S ribosomal DNA sequencing reveal arbuscular mycorrhizal fungi-mediated mitigation of selenate stress in Zea mays L. and reshaping of soil microbiota. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114217. [PMID: 36306613 DOI: 10.1016/j.ecoenv.2022.114217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 10/12/2022] [Accepted: 10/19/2022] [Indexed: 06/16/2023]
Abstract
Excessively high concentrations of selenium (Se) in soil are toxic to crop plants, and inoculation with arbuscular mycorrhizal fungi (AMF) can reverse Se stress in maize (Zea mays L.). To investigate the underlying mechanisms, maize seedlings were treated with sodium selenate (5 mg Se[VI] kg-1) and/or AMF (Funneliformis mosseae and Claroideoglomus etunicatum). Dual RNA sequencing in mycorrhiza and 16 S ribosomal DNA sequencing in soil were performed. The results showed that Se(VI) application alone decreased plant dry weight, but increased plant Se concentration, total Se content (mainly selenocysteine), and root superoxide content. Inoculation with either F. mosseae or C. etunicatum increased plant dry weight, decreased Se accumulation and selenocysteine proportion, enhanced root peroxidase activity, and alleviated oxidative stress in Se(VI)-treated plants. Inoculation also downregulated the expression of genes encoding Se transporters, assimilation enzymes, and cysteine-rich receptor-like kinases in Se(VI)-stressed plants, similar to plant-pathogen interaction and glutathione metabolism related genes. Conversely, genes encoding selenium-binding proteins and those related to phenylpropanoid biosynthesis were upregulated in inoculated plants under Se(VI) stress. Compared with Se(VI)-free plants, Se tolerance index, symbiotic feedback percentage on plant dry weight, and root colonization rate were all increased in inoculated plants under Se(VI) stress, corresponding to upregulated expression of 'key genes' in symbiosis. AMF inoculation increased bacterial diversity, decreased the relative abundances of selenobacteria related to plant Se absorption (e.g., Proteobacteria and Firmicutes), and improved bacterial network complexity in Se(VI)-stressed soils. We suggest that stress-mediated enhancement of mycorrhizal symbiosis contributed to plant Se(VI) tolerance, whereas AMF-mediated reshaping of soil bacterial community structure prevented excessive Se accumulation in maize.
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Affiliation(s)
- Chenyu Sun
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Qiao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Muhammad Zeeshan
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Paul Milham
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, New South Wales 2751, Australia
| | - Shengfeng Qin
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Junqing Ma
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Yisen Yang
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Hangxian Lai
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Jinghua Huang
- Guangxi Colleges and Universities Key Laboratory of Crop Cultivation and Tillage, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China.
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11
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Koletti A, Dervisi I, Kalloniati C, Zografaki ME, Rennenberg H, Roussis A, Flemetakis E. Selenium-binding Protein 1 (SBD1): A stress response regulator in Chlamydomonas reinhardtii. PLANT PHYSIOLOGY 2022; 189:2368-2381. [PMID: 35579367 PMCID: PMC9342975 DOI: 10.1093/plphys/kiac230] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 04/04/2022] [Indexed: 05/20/2023]
Abstract
Selenium-binding proteins (SBPs) represent a ubiquitous protein family implicated in various environmental stress responses, although the exact molecular and physiological role of the SBP family remains elusive. In this work, we report the identification and characterization of CrSBD1, an SBP homolog from the model microalgae Chlamydomonas reinhardtii. Growth analysis of the C. reinhardtii sbd1 mutant strain revealed that the absence of a functional CrSBD1 resulted in increased growth under mild oxidative stress conditions, although cell viability rapidly declined at higher hydrogen peroxide (H2O2) concentrations. Furthermore, a combined global transcriptomic and metabolomic analysis indicated that the sbd1 mutant exhibited a dramatic quenching of the molecular and biochemical responses upon H2O2-induced oxidative stress when compared to the wild-type. Our results indicate that CrSBD1 represents a cell regulator, which is involved in the modulation of C. reinhardtii early responses to oxidative stress. We assert that CrSBD1 acts as a member of an extensive and conserved protein-protein interaction network including Fructose-bisphosphate aldolase 3, Cysteine endopeptidase 2, and Glutaredoxin 6 proteins, as indicated by yeast two-hybrid assays.
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Affiliation(s)
- Aikaterini Koletti
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, Athens 11855, Greece
| | - Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, Athens 15784, Greece
| | - Chrysanthi Kalloniati
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, Athens 11855, Greece
| | - Maria-Eleftheria Zografaki
- Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, Athens 11855, Greece
| | - Heinz Rennenberg
- Center of Molecular Ecophysiology (CMEP), College of Resources and Environment, Chongqing 400715, China
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12
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Saleem M, Fariduddin Q. Novel mechanistic insights of selenium induced microscopic, histochemical and physio-biochemical changes in tomato (Solanum lycopersicum L.) plant. An account of beneficiality or toxicity. JOURNAL OF HAZARDOUS MATERIALS 2022; 434:128830. [PMID: 35429754 DOI: 10.1016/j.jhazmat.2022.128830] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/15/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Selenium (Se) is a well-known beneficial element in plants. The window of Se between toxic and optimal concentration is narrow and uneven which fluctuates with plants species. This experiment was aimed to investigate the morpho-physiological, microscopic and histochemical responses of two different varieties of tomato (S-22 and PKM-1), exposed to different concentrations of Se (0, 10, 40 or 80 µM), applied to soil at 30 days after transplantation (DAT). At 40 DAT, it was observed that high concentrations (40 or 80 µM) of Se radically increased oxidative stress examined by elevated reactive oxygen species (ROS), malondialdehyde (MDA) content, cell death, electrolyte leakage and decreased chlorophyll content leading phenotypic symptoms of Se-induced toxicity like stunted growth and chlorosis. Furthermore, high doses of Se altered the chloroplast and stomatal organisation, and adversely affected the photosynthetic performance of plants. But low concentration of Se improved the plant dry mass, photosynthesis, Rubisco activity, protein content and maintained the steady-state equilibrium among ROS generation and antioxidant enzymes like catalase, peroxidase and superoxide dismutase. Our outcomes proposed that high concentration of Se generated toxicity (phyto-selenosis), whereas lower concentration of Se-triggered positive impact by improving growth, photosynthetic traits and maintaining steady-state equilibrium between scavenging-system and ROS generation.
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Affiliation(s)
- Mohd Saleem
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Qazi Fariduddin
- Plant Physiology and Biochemistry Section, Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India.
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13
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Yang X, Liao X, Yu L, Rao S, Chen Q, Zhu Z, Cong X, Zhang W, Ye J, Cheng S, Xu F. Combined metabolome and transcriptome analysis reveal the mechanism of selenate influence on the growth and quality of cabbage (Brassica oleracea var. capitata L.). Food Res Int 2022; 156:111135. [DOI: 10.1016/j.foodres.2022.111135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/26/2022]
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14
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Xu Q, Shao X, Shi Y, Qian L, Zhou X, Qin W, Zhang M. Is selenium beneficial or detrimental to earthworm? Growth and metabolism responses of Eisenia Fetida to Na 2SeO 3 exposure. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150770. [PMID: 34624283 DOI: 10.1016/j.scitotenv.2021.150770] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 08/31/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Se unevenly distributed in soils due to variations of geology and anthropogenic input, which results in different effects on earthworms. The effects of Se were characterized by analyzing the growth and metabolism responses of earthworms after exposure to three different concentrations of Na2SeO3. The results showed that except the possible growth promotion at 5 mg/kg, low and middle-level exposure to Na2SeO3 (0.3-10 mg/kg) did not significantly affect the growth of earthworms. While a significant inhibition effect on growth was observed in the high-level exposure group (30-70 mg/kg). There was an inflection point for Se performing promotion to inhibition effects on earthworm growth. To investigate the metabolic response of earthworms, a novel HPLC-ESI-MS (High Performance Liquid Chromatography-Electrospray Ionization-Mass Spectrometry) method was used to determine sensitive biomarkers. Selenium exposure significantly altered the metabolism of seven essential amino acids, namely tyrosine, leucine, phenylalanine, valine, alanine, glycine, and lysine, and two selenoamino acids, namely selenomethionine and methylselenocysteine. The overall metabolism level of earthworms was not affected at low exposure concentrations, but was affected at medium and high exposure concentrations. The metabolic pathways that integrated the selenocompound metabolism and the tricarboxylic acid cycle from the perspective of energy supply and demand were affected by Na2SeO3 exposure. The derived reactive oxygen species at high exposure concentrations were probably the reason for the growth inhibition effect of Se on earthworms. This study provides biochemical insights into the effects of Na2SeO3 on earthworms and suggests that an Se concentration of about 2.3 mg/kg is appropriate for soil organism health.
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Affiliation(s)
- Qiuyun Xu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiuqing Shao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yajuan Shi
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Li Qian
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuan Zhou
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenyou Qin
- School of Biotechnology and Health Science, Wuyi University, Jiangmen City, Guangdong, China
| | - Meng Zhang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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15
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Dervisi I, Haralampidis K, Roussis A. Investigation of the interaction of a papain-like cysteine protease (RD19c) with selenium-binding protein 1 (SBP1) in Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 315:111157. [PMID: 35067295 DOI: 10.1016/j.plantsci.2021.111157] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
AtRD19c is a member of the papain-like cysteine proteases known for its participation in anther development after its maturation by βVPE (vacuolar processing enzyme). This papain-like cysteine protease was identified as an interacting protein of AtSBP1 (selenium binding protein 1) in a yeast two-hybrid screening. To confirm this interaction, we studied AtRD19c with respect to its expression and ability to interact with AtSBP1. The highest gene expression levels of AtRD19c were observed in the roots of 10-day-old seedlings, whereas minimum levels appeared in the hypocotyls of 10-day-old seedlings and flowers. AtRD19c expression was upregulated by selenium, and analysis of its promoter activity showed colocalization of a reporter gene (GUS) with AtSBP1. Additionally, the AtRD19c expression pattern was upregulated in the presence of selenite, indicating its participation in the Se response network. Confocal fluorescence microscopy revealed that AtRD19c localizes in the root tip, lateral roots, and leaf trichomes. Finally, we confirmed the physical interaction between AtRD19c and AtSBP1 and showed the importance of the first 175 aa of the AtSBP1 polypeptide in this interaction. Importantly, the AtRD19c-AtSBP1 interaction was also demonstrated in planta by employing bimolecular fluorescent complementation (BiFC) in a protoplast system.
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Affiliation(s)
- Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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16
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Singh S, Kumar V, Datta S, Dhanjal DS, Singh S, Kumar S, Kapoor D, Prasad R, Singh J. Physiological responses, tolerance, and remediation strategies in plants exposed to metalloids. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:40233-40248. [PMID: 32748354 DOI: 10.1007/s11356-020-10293-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/27/2020] [Indexed: 05/25/2023]
Abstract
Metalloids are a subset of particular concern to risk assessors and toxicologists because of their well-documented potential hazards to plant system. Most of the metalloids are major environmental contaminants which affect crop productivity when present in high concentrations in soil. Metalloids are coupled with carrier proteins of the plasma membrane and translocated to various organs causing changes in key metabolic processes, damages cell biomolecules, and finally inhibit its growth. Phytoremediation-based approaches help in understanding the molecular and biochemical mechanisms for prerequisite recombinant genetic approaches. Recent advancements in proteomics and plant genomics help in understanding the role of transcription factors, metabolites, and genes in plant system which confers metal tolerance. The present review summarizes our current status of knowledge in this direction related to various physiological responses, detoxification mechanisms, and remediation strategies of metalloids in crop plants in relation to plant-metalloid tolerance. Further, the role of various transcription factors and miRNAs in conferring metal tolerance is also briefed. Hence, the present review mainly focused on the alterations in the physiological activities of plants due to metalloid toxicity and the various mechanisms which get activated inside the plants to mitigate their toxic effects.
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Affiliation(s)
- Simranjeet Singh
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, 144411, India
- Punjab Biotechnology Incubator (PBTI), Phase-V, S.A.S. Nagar, Punjab, 160059, India
- RAWTL, Department of Water Supply and Sanitation, Phase-II, S.A.S. Nagar, Punjab, 160054, India
| | - Vijay Kumar
- Regional Ayurveda Research Institute for Drug Development, Gwalior, Madhya Pradesh, 474009, India
| | - Shivika Datta
- Department of Zoology, Doaba College Jalandhar, Jalandhar, Punjab, 144001, India
| | - Daljeet Singh Dhanjal
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, 144411, India
| | - Satyender Singh
- RAWTL, Department of Water Supply and Sanitation, Phase-II, S.A.S. Nagar, Punjab, 160054, India
| | - Sanjay Kumar
- Punjab Biotechnology Incubator (PBTI), Phase-V, S.A.S. Nagar, Punjab, 160059, India
- RAWTL, Department of Water Supply and Sanitation, Phase-II, S.A.S. Nagar, Punjab, 160054, India
| | - Dhriti Kapoor
- Department of Botany, Lovely Professional University, Phagwara, Punjab, 144411, India
| | - Ram Prasad
- Department of Botany, Mahatma Gandhi Central University, Motihari, Bihar, India.
| | - Joginder Singh
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, 144411, India.
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17
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Ahn E, Prom LK, Hu Z, Odvody G, Magill C. Genome-wide association analysis for response of Senegalese sorghum accessions to Texas isolates of anthracnose. THE PLANT GENOME 2021; 14:e20097. [PMID: 33900689 DOI: 10.1002/tpg2.20097] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Anthracnose disease of sorghum is caused by Colletotrichum sublineola, a filamentous fungus. The genetic basis of resistance to anthracnose in sorghum is largely unclear, especially in Senegalese sorghum germplasm. In this study, 163 Senegalese sorghum accessions were evaluated for response to C. sublineola, and a genome-wide association study (GWAS) was performed to identify genetic variation associated with response to C. sublineola using 193,727 single nucleotide polymorphisms (SNPs) throughout the genome. Germplasm diversity analysis showed low genetic diversity and slow linkage disequilibrium (LD) decay among the Senegalese accessions. Phenotypic analysis resulted in relatively low differences to C. sublineola among the tested population. Genome-wide association study did not identify any significant association based on a strict threshold for the number of SNPs available. However, individual analysis of the top eight SNPs associated with relative susceptibility and resistance identified candidate genes that have been shown to play important roles in plant stress tolerance in previous studies. This study identifies sorghum genes whose annotated properties have known roles in host defense and thus identify them as candidates for use in breeding for resistance to anthracnose.
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Affiliation(s)
- Ezekiel Ahn
- Dep. of Plant Pathology & Microbiology, Texas A&M Univ., College Station, TX, 77843, USA
| | - Louis K Prom
- USDA-ARS Southern Plains Agricultural Research Center, College Station, TX, 77845, USA
| | - Zhenbin Hu
- Donald Danforth Plant Science Center, Saint Louis, MO, 63132, USA
| | - Gary Odvody
- Texas A&M AgriLife Research, Corpus Christi, TX, 78406, USA
| | - Clint Magill
- Dep. of Plant Pathology & Microbiology, Texas A&M Univ., College Station, TX, 77843, USA
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18
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Rao S, Yu T, Cong X, Lai X, Xiang J, Cao J, Liao X, Gou Y, Chao W, Xue H, Cheng S, Xu F. Transcriptome, proteome, and metabolome reveal the mechanism of tolerance to selenate toxicity in Cardamine violifolia. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124283. [PMID: 33187796 DOI: 10.1016/j.jhazmat.2020.124283] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 05/28/2023]
Abstract
Cardamine violifolia was found here to accumulate selenium (Se) to over 9000 mg kg-1 dry weight. To investigate the mechanism of Se accumulation and tolerance in C. violifolia, metabolome, transcriptome, and proteome technologies were applied to C. violifolia seedlings treated with selenate. Several sulfate transporter (Sultr) genes (Sultr1;1, Sultr1;2, and Sultr2;1) and sulfur assimilatory enzyme genes showed high expression levels in response to selenate. Many calcium protein and cysteine-rich kinase genes of C. violifolia were downregulated, whereas selenium-binding protein 1 (SBP1) and protein sulfur deficiency-induced 2 (SDI2) of C. violifolia were upregulated by selenate. The expression of genes involved in the ribosome and posttranslational modifications and chaperones in C. violifolia were also detected in response to selenate. Based on the results of this study and previous findings, we suggest that the downregulated expression of calcium proteins and cysteine-rich kinases, and the upregulated expression of SBP1 and SDI2, were important contributors to the Se tolerance of C. violifolia. The downregulation of cysteine-rich kinases and calcium proteins would enhance Se tolerance of C. violifolia is a novel proposition that has not been reported on other Se hyperaccumulators. This study provides us novel insights to understand Se accumulation and tolerance in plants.
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Affiliation(s)
- Shen Rao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China; Engineering Research Center of Ecology and Agricultural Use of Wetland of Ministry of Education, Yangtze University, Jingzhou 434025, Hubei, China.
| | - Tian Yu
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan 430023, China; Enshi Se-Run Health Tech Development Co., Ltd., Enshi 445000, China.
| | - Xin Cong
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan 430023, China; Enshi Se-Run Health Tech Development Co., Ltd., Enshi 445000, China.
| | - Xiaozhuo Lai
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China.
| | - Jiqian Xiang
- Enshi Autonomous Prefecture Academy of Agriculture Sciences, Enshi 445002, China.
| | - Jie Cao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China.
| | - Xiaoli Liao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China.
| | - Yuanyuan Gou
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China.
| | - Wei Chao
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China.
| | - Hua Xue
- National Selenium Rich Product Quality Supervision and Inspection Center, Enshi 445000, Hubei, China.
| | - Shuiyuan Cheng
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan 430023, China; National Selenium Rich Product Quality Supervision and Inspection Center, Enshi 445000, Hubei, China.
| | - Feng Xu
- College of Horticulture and Gardening, Yangtze University, Jingzhou 434025, China; Engineering Research Center of Ecology and Agricultural Use of Wetland of Ministry of Education, Yangtze University, Jingzhou 434025, Hubei, China.
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19
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Hasanuzzaman M, Bhuyan MHMB, Raza A, Hawrylak-Nowak B, Matraszek-Gawron R, Nahar K, Fujita M. Selenium Toxicity in Plants and Environment: Biogeochemistry and Remediation Possibilities. PLANTS (BASEL, SWITZERLAND) 2020; 9:E1711. [PMID: 33291816 PMCID: PMC7762096 DOI: 10.3390/plants9121711] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is a widely distributed trace element with dual (beneficial or toxic) effects for humans, animals, and plants. The availability of Se in the soil is reliant on the structure of the parental material and the procedures succeeding to soil formation. Anthropogenic activities affect the content of Se in the environment. Although plants are the core source of Se in animal and human diet, the role of Se in plants is still debatable. A low concentration of Se can be beneficial for plant growth, development, and ecophysiology both under optimum and unfavorable environmental conditions. However, excess Se results in toxic effects, especially in Se sensitive plants, due to changing structure and function of proteins and induce oxidative/nitrosative stress, which disrupts several metabolic processes. Contrary, Se hyperaccumulators absorb and tolerate exceedingly large amounts of Se, could be potentially used to remediate, i.e., remove, transfer, stabilize, and/or detoxify Se-contaminants in the soil and groundwater. Thereby, Se-hyperaccumulators can play a dynamic role in overcoming global problem Se-inadequacy and toxicity. However, the knowledge of Se uptake and metabolism is essential for the effective phytoremediation to remove this element. Moreover, selecting the most efficient species accumulating Se is crucial for successful phytoremediation of a particular Se-contaminated area. This review emphasizes Se toxicity in plants and the environment with regards to Se biogeochemistry and phytoremediation aspects. This review follows a critical approach and stimulates thought for future research avenues.
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Affiliation(s)
- Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | | | - Ali Raza
- Key Lab of Biology and Genetic Improvement of Oil Crops, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Wuhan 430062, China;
| | - Barbara Hawrylak-Nowak
- Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland; (B.H.-N.); (R.M.-G.)
| | - Renata Matraszek-Gawron
- Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland; (B.H.-N.); (R.M.-G.)
| | - Kamrun Nahar
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh;
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
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20
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Hasanuzzaman M, Bhuyan MHMB, Raza A, Hawrylak-Nowak B, Matraszek-Gawron R, Nahar K, Fujita M. Selenium Toxicity in Plants and Environment: Biogeochemistry and Remediation Possibilities. PLANTS (BASEL, SWITZERLAND) 2020; 9:plants9121711. [PMID: 33291816 DOI: 10.1016/j.envexpbot.2020.104170] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 05/22/2023]
Abstract
Selenium (Se) is a widely distributed trace element with dual (beneficial or toxic) effects for humans, animals, and plants. The availability of Se in the soil is reliant on the structure of the parental material and the procedures succeeding to soil formation. Anthropogenic activities affect the content of Se in the environment. Although plants are the core source of Se in animal and human diet, the role of Se in plants is still debatable. A low concentration of Se can be beneficial for plant growth, development, and ecophysiology both under optimum and unfavorable environmental conditions. However, excess Se results in toxic effects, especially in Se sensitive plants, due to changing structure and function of proteins and induce oxidative/nitrosative stress, which disrupts several metabolic processes. Contrary, Se hyperaccumulators absorb and tolerate exceedingly large amounts of Se, could be potentially used to remediate, i.e., remove, transfer, stabilize, and/or detoxify Se-contaminants in the soil and groundwater. Thereby, Se-hyperaccumulators can play a dynamic role in overcoming global problem Se-inadequacy and toxicity. However, the knowledge of Se uptake and metabolism is essential for the effective phytoremediation to remove this element. Moreover, selecting the most efficient species accumulating Se is crucial for successful phytoremediation of a particular Se-contaminated area. This review emphasizes Se toxicity in plants and the environment with regards to Se biogeochemistry and phytoremediation aspects. This review follows a critical approach and stimulates thought for future research avenues.
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Affiliation(s)
- Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - M H M Borhannuddin Bhuyan
- Citrus Research Station, Bangladesh Agricultural Research Institute, Jaintapur, Sylhet 3156, Bangladesh
| | - Ali Raza
- Key Lab of Biology and Genetic Improvement of Oil Crops, Oil Crops Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Wuhan 430062, China
| | - Barbara Hawrylak-Nowak
- Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland
| | - Renata Matraszek-Gawron
- Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, 20-950 Lublin, Poland
| | - Kamrun Nahar
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, 2393 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0795, Japan
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21
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Rao S, Yu T, Cong X, Xu F, Lai X, Zhang W, Liao Y, Cheng S. Integration analysis of PacBio SMRT- and Illumina RNA-seq reveals candidate genes and pathway involved in selenium metabolism in hyperaccumulator Cardamine violifolia. BMC PLANT BIOLOGY 2020; 20:492. [PMID: 33109081 PMCID: PMC7590678 DOI: 10.1186/s12870-020-02694-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 10/12/2020] [Indexed: 05/06/2023]
Abstract
BACKGROUND Cardamine violifolia, native to China, is one of the selenium (Se) hyperaccumulators. The mechanism of Se metabolism and tolerance remains unclear, and only limited genetic information is currently available. Therefore, we combined a PacBio single-molecule real-time (SMRT) transcriptome library and the Illumina RNA-seq data of sodium selenate (Na2SeO4)-treated C. violifolia to further reveal the molecular mechanism of Se metabolism. RESULTS The concentrations of the total, inorganic, and organic Se in C. violifolia seedlings significantly increased as the Na2SeO4 treatment concentration increased. From SMRT full-length transcriptome of C. violifolia, we obtained 26,745 annotated nonredundant transcripts, 14,269 simple sequence repeats, 283 alternative splices, and 3407 transcription factors. Fifty-one genes from 134 transcripts were identified to be involved in Se metabolism, including transporter, assimilatory enzyme, and several specific genes. Analysis of Illumina RNA-Seq data showed that a total of 948 differentially expressed genes (DEGs) were filtered from the four groups with Na2SeO4 treatment, among which 11 DEGs were related to Se metabolism. The enrichment analysis of KEGG pathways of all the DEGs showed that they were significantly enriched in five pathways, such as hormone signal transduction and plant-pathogen interaction pathways. Four genes related to Se metabolism, adenosine triphosphate sulfurase 1, adenosine 5'-phosphosulfate reductase 3, cysteine (Cys) desulfurase 1, and serine acetyltransferase 2, were regulated by lncRNAs. Twenty potential hub genes (e.g., sulfate transporter 1;1, Cys synthase, methionine gamma-lyase, and Se-binding protein 1) were screened and identified to play important roles in Se accumulation and tolerance in C. violifolia as concluded by weighted gene correlation network analysis. Based on combinative analysis of expression profiling and annotation of genes as well as Se speciation and concentration in C. violifolia under the treatments with different Na2SeO4 concentrations, a putative Se metabolism and assimilation pathway in C. violifolia was proposed. CONCLUSION Our data provide abundant information on putative gene transcriptions and pathway involved in Se metabolism of C. violifolia. The findings present a genetic resource and provide novel insights into the mechanism of Se hyperaccumulation in C. violifolia.
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Affiliation(s)
- Shen Rao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025 China
| | - Tian Yu
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, 430023 China
- Enshi Se-Run Health Tech Development Co., Ltd, Enshi, 445000 China
| | - Xin Cong
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, 430023 China
- Enshi Se-Run Health Tech Development Co., Ltd, Enshi, 445000 China
| | - Feng Xu
- College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025 China
| | - Xiaozhuo Lai
- College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025 China
| | - Weiwei Zhang
- College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025 China
| | - Yongling Liao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, 434025 China
| | - Shuiyuan Cheng
- National R&D for Se-rich Agricultural Products Processing Technology, Wuhan Polytechnic University, Wuhan, 430023 China
- National Selenium Rich Product Quality Supervision and Inspection Center, Enshi, 445000 Hubei China
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22
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González-Gordo S, Palma JM, Corpas FJ. Appraisal of H 2S metabolism in Arabidopsis thaliana: In silico analysis at the subcellular level. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 155:579-588. [PMID: 32846393 DOI: 10.1016/j.plaphy.2020.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/22/2020] [Accepted: 08/05/2020] [Indexed: 05/15/2023]
Abstract
Hydrogen sulfide (H2S) has become a new signal molecule in higher plants which seems to be involved in almost all physiological processes from seed germination, root and plant growth until flowering and fruit ripening. Moreover, H2S also participates in the mechanism of response against adverse environmental stresses. However, its basic biochemistry in plant cells can be considered in a nascent stage. Using the available information of the model plant Arabidopsis thaliana, the goal of the present study is to provide a broad overview of H2S metabolism and to display an in silico analysis of the 26 enzymatic components involved in the metabolism of H2S and their subcellular compartmentation (cytosol, chloroplast and mitochondrion) thus providing a wide picture of the cross-talk inside the organelles and amongst them and, consequently, to get a better understanding of the cellular and tissue implications of H2S. This information will be also relevant for other crop species, especially those whose whole genome is not yet available.
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Affiliation(s)
- Salvador González-Gordo
- Antioxidant, Free Radical and Nitric Oxide in Biotechnology, Food and Agriculture Group, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
| | - José M Palma
- Antioxidant, Free Radical and Nitric Oxide in Biotechnology, Food and Agriculture Group, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
| | - Francisco J Corpas
- Antioxidant, Free Radical and Nitric Oxide in Biotechnology, Food and Agriculture Group, Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain.
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Jiang L, Yang J, Liu C, Chen Z, Yao Z, Cao S. Overexpression of ethylene response factor ERF96 gene enhances selenium tolerance in Arabidopsis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 149:294-300. [PMID: 32097848 DOI: 10.1016/j.plaphy.2020.02.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 02/16/2020] [Accepted: 02/18/2020] [Indexed: 05/19/2023]
Abstract
Ethylene response factors (ERFs) are involved in the regulation of plant responses to biotic and abiotic stresses. Here we provide evidence for a role of ERF96, a member of the ERF transcription factor group IX, in selenite tolerance in Arabidopsis. ERF96 gene was rapidly up-regulated in response to selenite stress. Overexpression of ERF96 enhanced Arabidopsis resistance to selenite stress, while ERF96-silenced plants demonstrated wild-type (WT) resistance to selenite. In addition, the overexpression plants had significantly lower selenium (Se) content in shoots when subjected to selenite stress. Further investigation indicated that overexpression of ERF96 reduced transcript levels of selenite/phosphate transporters PHT1;1 and PHT2;1, which influenced Arabidopsis Se uptake and allocation in the presence of selenite. Moreover, our experiments showed that overexpression of ERF96 enhanced Arabidopsis antioxidant activity. Under selenite stress, ERF96-overexpressing lines exhibited the significant increases in catalase (CAT) and glutathione peroxidase (GPX) activities as well as the glutathione (GSH) content, while had a decrease in reactive oxygen species (ROS) accumulation compared to WT. Taken together, our results demonstrate that ERF96 plays a positive role in the regulation of selenite tolerance in Arabidopsis.
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Affiliation(s)
- Li Jiang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China.
| | - Juan Yang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Changxuan Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Ziping Chen
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Zhicheng Yao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Shuqing Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
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24
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Mandal S, Pu S, Wang X, Ma H, Bai Y. Hierarchical porous structured polysulfide supported nZVI/biochar and efficient immobilization of selenium in the soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134831. [PMID: 31784164 DOI: 10.1016/j.scitotenv.2019.134831] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/18/2019] [Accepted: 10/03/2019] [Indexed: 06/10/2023]
Abstract
Soil pollution with selenium is a significant environmental problem in several areas of the world, which extremely affects the growth of plants and human health. Thus, it is necessary to find an effective method to immobilize selenium in the soil to make it less bioavailable and less accessible. In this study, the low-cost biochar-supported nanoscale zero-valent iron and polysulfide (PS-nZVI@BC) are produced and used for the immobilization of selenium (Se) in soil. The FTIR, UV-Vis, XRD, VSM, SEM and XPS techniques validate surface properties and morphology of PS-nZVI@BC. Introduction of S2- led to the in-situ formation of FeS on the surface of the biochar supported zero valent iron. Two intense Bragg peaks (2θ) of 40.5°, 44.5° were corresponded to Fe0 basal plane, indicating the presence of nZVI in nZVI@BC and PS-nZVI@BC. The modified biochar presents a magnetic saturation value of 0.008 emu/mg, reasonably less than the reported values of bare nZVI. The soil immobilization showed that the PS-nZVI@BC is more effective for the control of selenium than the biochar and nZVI@BC. The available selenium content decreased by 77.29% in PS-nZVI@BC amended soil after 30 days. From sequential extraction procedure (SEP) results, it was observed that PS-nZVI@BC promoted the conversion of more accessible Se (water-soluble and exchangeable fractions) into the less accessible forms (acid-soluble, organic, and residual fractions) to reduce the toxicity of Se. Surface sorption, reduction and complexation were dominant mechanisms for Se immobilization. Hence, PS-nZVI@BC is promising and effective for immobilizing Se in contaminated soils and improving the soil properties.
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Affiliation(s)
- Sandip Mandal
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Shengyan Pu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
| | - Xiaoke Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China
| | - Hui Ma
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 401871 Frederiksberg, Denmark
| | - Yingchen Bai
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
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25
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Ren M, Qin Z, Li X, Wang L, Wang Y, Zhang J, Huang Y, Yang S. Selenite antagonizes the phytotoxicity of Cd in the cattail Typha angustifolia. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 189:109959. [PMID: 31787383 DOI: 10.1016/j.ecoenv.2019.109959] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 11/11/2019] [Accepted: 11/12/2019] [Indexed: 06/10/2023]
Abstract
The Phytotoxicity of and mechanism underlying selenite-mediated tolerance to Cd stress in Typha angustifolia were studied hydroponically with respect to metal uptake and translocation, photosynthesis-related parameters, contents of proline and O2•-, products of lipid peroxidation, cell viability, enzymatic and non-enzymatic antioxidants, glyoxalases and phytochelatins. T. angustifolia were exposed to 25, 50 and 100 μM of Cd alone and in conjunction with 5 mg L-1 of selenite in full-strength Hoagland's nutrient solution for 30 days. Results showed that Cd contents in T. angustifolia leaves and roots increased in a dose-dependent manner and were higher in roots, but those of BAC, BCF and TF changed in a contrary pattern. Addition of selenite to Cd-containing treatments further reduced Cd levels in T. angustifolia leaves and roots, as well as BAC, BCF and TF. A diphasic effect was found in T. angustifolia for the contents of total chlorophyll, GSH, PC and GSSG, as well as activities of CAT, POD, SOD and GR, in response to Cd stress alone and in conjunction with selenite supplementation, but the same effect was not observed for Pn, Cond, Tr, Ci, Fv/Fm and ϕPSII. In contrast, exogenous selenite supplementation enhanced the contents of total chlorophyll and the non-enzymatic antioxidants, as well as activities of enzymatic antioxidants, while the values of photosynthetic fluorescence parameters were rescued. Selenite addition decreased Cd-induced cell death. Proline contents and Gly I activities in T. angustifolia leaves kept increasing in a dose-dependent manner of Cd concentrations in the growth media and selenite addition further enhanced both parameters. Addition of selenite could quench Cd-mediated generation of MDA, O2•- and MG in T. angustifolia leaves and reduce Cd-induced Gly II activity. A U-shaped GSH/GSSG ratio in T. angustifolia leaves suggests a possible trade-off between PC synthesis and GR activity since both share the same substrate GSH. Therefore, confined BAC, BCF and TF were a mechanism that confers T. angustifolia tolerance to Cd stress, and that exogenous selenite supplementation could depress Cd-induced stress in T. angustifolia by rescuing the photosynthetic fluorescence, enhancing non-enzymatic and enzymatic antioxidants that scavenge O2•- and MG, and potentiating PC synthesis that chelates Cd.
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Affiliation(s)
- Mengmeng Ren
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Zhenjie Qin
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Xin Li
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Ling Wang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Yuanxiu Wang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Jie Zhang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Yongjie Huang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
| | - Shiyong Yang
- College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China; Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biology Resources, College of Life Sciences, Anhui Normal University, Wuhu, 241000, PR China.
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26
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Valassakis C, Dervisi I, Agalou A, Papandreou N, Kapetsis G, Podia V, Haralampidis K, Iconomidou VA, Spaink HP, Roussis A. Novel interactions of Selenium Binding Protein family with the PICOT containing proteins AtGRXS14 and AtGRXS16 in Arabidopsis thaliana. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 281:102-112. [PMID: 30824043 DOI: 10.1016/j.plantsci.2019.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
During abiotic stress the primary symptom of phytotoxicity can be ROS production which is strictly regulated by ROS scavenging pathways involving enzymatic and non-enzymatic antioxidants. Furthermore, ROS are well-described secondary messengers of cellular processes, while during the course of evolution, plants have accomplished high degree of control over ROS and used them as signalling molecules. Glutaredoxins (GRXs) are small and ubiquitous glutathione (GSH) -or thioredoxin reductase (TR)-dependent oxidoreductases belonging to the thioredoxin (TRX) superfamily which are conserved in most eukaryotes and prokaryotes. In Arabidopsis thaliana GRXs are subdivided into four classes playing a central role in oxidative stress responses and physiological functions. In this work, we describe a novel interaction of AtGRXS14 with the Selenium Binding Protein 1 (AtSBP1), a protein proposed to be integrated in a regulatory network that senses alterations in cellular redox state and acts towards its restoration. We further show that SBP protein family interacts with AtGRXS16 that also contains a PICOT domain, like AtGRXS14.
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Affiliation(s)
- Chrysanthi Valassakis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Irene Dervisi
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Adamantia Agalou
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Nikolaos Papandreou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Georgios Kapetsis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Varvara Podia
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Kosmas Haralampidis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece
| | - Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, National & Kapodistrian University, 15784, Athens, Greece
| | - Herman P Spaink
- Institute of Biology, Leiden University, Leiden, the Netherlands
| | - Andreas Roussis
- Department of Botany, Faculty of Biology, National & Kapodistrian University of Athens, 15784, Athens, Greece.
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27
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Jiang L, Liu C, Cao H, Chen Z, Yang J, Cao S, Wei Z. The role of cytokinin in selenium stress response in Arabidopsis. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 281:122-132. [PMID: 30824045 DOI: 10.1016/j.plantsci.2019.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 01/28/2019] [Accepted: 01/30/2019] [Indexed: 06/09/2023]
Abstract
Cytokinins (CKs) regulate many developmental processes and environmental stress responses in plants. In this study, our data provide evidence that CK negatively regulates Arabidopsis selenium (Se) stress response. CK-deficient plant ipt1 3 5 7 exhibited enhanced Se tolerance which was abolished by exogenous benzylaminopurine (BA) application, while CK- receptor -deficient mutants ahk2 and ahk3 were sensitive to Se stress. Further investigation suggested that CK regulated Se tolerance of ipt1 3 5 7 through reduction of Se uptake and activation of metabolism detoxification, which had significantly lower transcriptions of high-affinity transporters PHT1;1, PHT1;8, PHT1;9 and the higher transcription of selenocysteine methyltransferase (SMT) respectively. Moreover, Se tolerance of ipt1 3 5 7 was associated with the enhanced antioxidant levels which had the higher catalase (CAT), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activities as well as the higher glutathione (GSH) content. On the other hand, loss-of-function mutations in single CK receptor genes could increase Se uptake and reactive oxygen species (ROS) accumulation, which caused Se sensitivity in ahk2 and ahk3 mutants. Taken together, these findings provide new insights to the role of CK in Se stress response in Arabidopsis.
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Affiliation(s)
- Li Jiang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China.
| | - Changxuan Liu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Haimei Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Ziping Chen
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, Anhui, 230036, China
| | - Juan Yang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Shuqing Cao
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Zhaojun Wei
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
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28
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Kolbert Z, Molnár Á, Feigl G, Van Hoewyk D. Plant selenium toxicity: Proteome in the crosshairs. JOURNAL OF PLANT PHYSIOLOGY 2019; 232:291-300. [PMID: 30544054 DOI: 10.1016/j.jplph.2018.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/02/2018] [Accepted: 11/02/2018] [Indexed: 05/23/2023]
Abstract
The metalloid element, selenium (Se) is in many ways special and perhaps because of this its research in human and plant systems is of great interest. Despite its non-essentiality, higher plants take it up and metabolize it via sulfur pathways, but higher amounts of Se cause toxic symptoms in plants. However, the molecular mechanisms of selenium phytotoxicity have been only partly revealed; the data obtained so far point out that Se toxicity targets the plant proteome. Besides seleno- and oxyproteins, nitroproteins are also formed due to Se stress. In order to minimize proteomic damages induced by Se, certain plants are able to redirect selenocysteine away from protein synthesis thus preventing Se-protein formation. Additionally, the damaged or malformed selenoproteins, oxyproteins and nitroproteins may be removed by proteasomes. Based on the literature this review sets Se toxicity mechanisms into a new concept and it draws attention to the importance of Se-induced protein-level changes.
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Affiliation(s)
- Z Kolbert
- Department of Plant Biology, University of Szeged, 6726 Szeged Közép fasor 52, Hungary.
| | - Á Molnár
- Department of Plant Biology, University of Szeged, 6726 Szeged Közép fasor 52, Hungary.
| | - G Feigl
- Department of Plant Biology, University of Szeged, 6726 Szeged Közép fasor 52, Hungary.
| | - D Van Hoewyk
- Department of Biology, Coastal Carolina University, Conway, SC 29526, USA.
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Jiang L, Cao H, Chen Z, Liu C, Cao S, Wei Z, Han Y, Gao Q, Wang W. Cytokinin is involved in TPS22-mediated selenium tolerance in Arabidopsis thaliana. ANNALS OF BOTANY 2018; 122:501-512. [PMID: 29868879 PMCID: PMC6110340 DOI: 10.1093/aob/mcy093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 05/03/2018] [Indexed: 05/26/2023]
Abstract
Background and Aims Excess selenium (Se) is toxic to plants, but relatively little is known about the regulatory mechanism of plant Se tolerance. This study explored the role of the TPS22 gene in Se tolerance in Arabidopsis thaliana. Methods Arabidopsis wild type and XVE mutant seeds were grown on half-strength MS media containing Na2SeO3 for screening of the Se-tolerant mutant tps22. The XVE T-DNA-tagged genomic sequence in tps22 was identified by TAIL-PCR. The TPS22 gene was transformed into the mutant tps22 and wild type plants using the flower infiltration method. Wild type, tps22 mutant and transgenic seedlings were cultivated on vertical plates for phenotype analysis, physiological index measurement and gene expression analysis. Key Results We identified an Arabidopsis Se-tolerant mutant tps22 from the XVE pool lines, and cloned the gene which encodes the terpenoid synthase (TPS22). TPS22 was downregulated by Se stress, and loss-of-function of TPS22 resulted in decreased Se accumulation and enhanced Se tolerance; by contrast, overexpression of TPS22 showed similar traits to the wild type under Se stress. Further analysis revealed that TPS22 mediated Se tolerance through reduction of Se uptake and activation of metabolism detoxification, which decreased transcription of high-affinity transporters PHT1;1, PHT1;8 and PHT1;9 and significantly increased transcription of selenocysteine methyltransferase (SMT), respectively. Moreover, loss-of-function of TPS22 resulted in reduced cytokinin level and repression of cytokinin signalling components AHK3 and AHK4, and upregulation of ARR3, ARR15 and ARR16. Exogenous cytokinin increased transcription of PHT1;1, PHT2;1 and SMT and decreased Se tolerance of the tps22 mutant. In addition, enhanced Se resistance of the tps22 mutant was associated with glutathione (GSH). Conclusions Se stress downregulated TPS22, which reduced endogenous cytokinin level, and then affected the key factors of Se uptake and metabolism detoxification. This cascade of events resulted in reduced Se accumulation and enhanced Se tolerance.
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Affiliation(s)
- Li Jiang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Haimei Cao
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Ziping Chen
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
- School of Life Science, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Changxuan Liu
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Shuqing Cao
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Zhaojun Wei
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Yi Han
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Qiuchen Gao
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
| | - Weiyan Wang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, Anhui, China
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30
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Valassakis C, Livanos P, Minopetrou M, Haralampidis K, Roussis A. Promoter analysis and functional implications of the selenium binding protein (SBP) gene family in Arabidopsis thaliana. JOURNAL OF PLANT PHYSIOLOGY 2018; 224-225:19-29. [PMID: 29574326 DOI: 10.1016/j.jplph.2018.03.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 05/23/2023]
Abstract
Selenium Βinding Protein (SBP, originally termed SBP56) was identified in mouse liver as a cytosolic protein that could bind radioactive selenium. SBPs are highly conserved proteins present in a wide array of species across all kingdoms and are likely to be involved in selenium metabolism. In Arabidopsis, the selenium binding protein (SBP) gene family comprises three genes (AtSBP1, AtSBP2 and AtSBP3). AtSBP1 and AtSBP2 are clustered in a head-to-tail arrangement on chromosome IV, while AtSBP3 is located on chromosome III. In this work, we studied the promoter activity of the Arabidopsis SBP genes, determined their tissue specificity and showed that they are differentially regulated by sodium selenite and sodium selenate. All three SBP genes are upregulated in response to externally applied selenium compounds and the antioxidant NAC selectively downregulates SBP2. Although the effect on SBP2 levels was the most prominent, in all cases, the concurrent exposure of plants to selenite and the antioxidant supressed the expression of the SBP genes. We provide evidence that (at least) SBP1 expression is tightly linked to detoxification processes related to oxidative stress, since it is downregulated in the presence of NAC in selenium-treated plants. Furthermore, our results suggest that SBP genes may participate in the mechanisms that sense redox imbalance.
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Affiliation(s)
- Chrysanthi Valassakis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Pantelis Livanos
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Martha Minopetrou
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Kosmas Haralampidis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece
| | - Andreas Roussis
- National and Kapodistrian University of Athens, Faculty of Biology, Department of Botany, 15784 Athens, Greece.
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31
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Van Hoewyk D. Defects in endoplasmic reticulum-associated degradation (ERAD) increase selenate sensitivity in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2018; 13:e1171451. [PMID: 27045899 PMCID: PMC5933916 DOI: 10.1080/15592324.2016.1171451] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 03/21/2016] [Accepted: 03/21/2016] [Indexed: 05/23/2023]
Abstract
Stress can impair protein folding in the endoplasmic reticulum (ER). Minimizing the accumulation of misfolded proteins in the ER is achieved by ER-associated degradation (ERAD), which involves the retrograde transport and proteasomal removal of aberrant proteins. Recently, the proteasome has been implicated in a selenium stress response. However, it remains unknown if selenium causes ER stress in plants similar to animals, and if ERAD is associated with optimal selenium tolerance. This deficiency was addressed by monitoring selenate-treated Arabidopsis plants with mutations in HRD1 and SeL1L, participants of ERAD. hrd1a/hrd1b and sel1l mutants treated with selenate demonstrate decreased tolerance and ER stress, as judged by BiP2 accumulation. The data indicate that optimal plant growth during selenate stress requires ERAD.
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Affiliation(s)
- Doug Van Hoewyk
- Coastal Carolina University, Biology Department, Conway, South Carolina, USA
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32
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Molnár Á, Feigl G, Trifán V, Ördög A, Szőllősi R, Erdei L, Kolbert Z. The intensity of tyrosine nitration is associated with selenite and selenate toxicity in Brassica juncea L. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 147:93-101. [PMID: 28837875 DOI: 10.1016/j.ecoenv.2017.08.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/07/2017] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Abstract
Selenium phytotoxicity involves processes like reactive nitrogen species overproduction and nitrosative protein modifications. This study evaluates the toxicity of two selenium forms (selenite and selenate at 0µM, 20µM, 50µM and 100µM concentrations) and its correlation with protein tyrosine nitration in the organs of hydroponically grown Indian mustard (Brassica juncea L.). Selenate treatment resulted in large selenium accumulation in both Brassica organs, while selenite showed slight root-to-shoot translocation resulting in a much lower selenium accumulation in the shoot. Shoot and root growth inhibition and cell viability loss revealed that Brassica tolerates selenate better than selenite. Results also show that relative high amounts of selenium are able to accumulate in Brassica leaves without obvious visible symptoms such as chlorosis or necrosis. The more severe phytotoxicity of selenite was accompanied by more intense protein tyrosine nitration as well as alterations in nitration pattern suggesting a correlation between the degree of Se forms-induced toxicities and nitroproteome size, composition in Brassica organs. These results imply the possibility of considering protein tyrosine nitration as novel biomarker of selenium phytotoxicity, which could help the evaluation of asymptomatic selenium stress of plants.
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Affiliation(s)
- Árpád Molnár
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Gábor Feigl
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Vanda Trifán
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Attila Ördög
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Réka Szőllősi
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - László Erdei
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
| | - Zsuzsanna Kolbert
- Department of Plant Biology, University of Szeged, Közép fasor 52, H-6726 Szeged, Hungary.
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Leal-Alvarado DA, Martínez-Hernández A, Calderón-Vázquez CL, Uh-Ramos D, Fuentes G, Ramírez-Prado JH, Sáenz-Carbonell L, Santamaría JM. Identification of up-regulated genes from the metal-hyperaccumulator aquatic fern Salvinia minima Baker, in response to lead exposure. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 193:86-96. [PMID: 29053962 DOI: 10.1016/j.aquatox.2017.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/10/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
Lead (Pb) is one of the most serious environmental pollutants. The aquatic fern Salvinia minima Baker is capable to hyper-accumulate Pb in their tissues. However, the molecular mechanisms involved in its Pb accumulation and tolerance capacity are not fully understood. In order to investigate the molecular mechanisms that are activated by S. minima in response to Pb, we constructed a suppression subtractive hybridization library (SSH) in response to an exposure to 40μM of Pb(NO3)2 for 12h. 365 lead-related differentially expressed sequences tags (ESTs) were isolated and sequenced. Among these ESTs, 143 unique cDNA (97 were registered at the GenBank and 46 ESTs were not registered, because they did not meet the GenBank conditions). Those ESTs were identified and classified into 3 groups according to Blast2GO. In terms of metabolic pathways, they were grouped into 29 KEGG pathways. Among the ESTs, we identified some that might be part of the mechanism that this fern may have to deal with this metal, including abiotic-stress-related transcription factors, some that might be involved in tolerance mechanisms such as ROS scavenging, membrane protection, and those of cell homeostasis recovery. To validate the SSH library, 4 genes were randomly selected from the library and analyzed by qRT-PCR. These 4 genes were transcriptionally up-regulated in response to lead in at least one of the two tested tissues (roots and leaves). The present library is one of the few genomics approaches to study the response to metal stress in an aquatic fern, representing novel molecular information and tools to understand the molecular physiology of its Pb tolerance and hyperaccumulation capacity. Further research is required to elucidate the functions of the lead-induced genes that remain classified as unknown, to perhaps reveal novel molecular mechanisms of Pb tolerance and accumulation capacity in aquatic plants.
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Affiliation(s)
- Daniel A Leal-Alvarado
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
| | - A Martínez-Hernández
- Colegio de Posgraduados, Campus Campeche, Carretera Haltunchén-Edzná km 17.5, Sihochac, Champotón, Campeche, C. P. 24450, Mexico
| | - C L Calderón-Vázquez
- Instituto Politécnico Nacional-CIIDIR, SINALOA, Boulevard Juan de Dios Bátiz Paredes #250, Colonia San Joachin, Guasave, Sinaloa, Mexico
| | - D Uh-Ramos
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
| | - G Fuentes
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
| | - J H Ramírez-Prado
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
| | - L Sáenz-Carbonell
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
| | - J M Santamaría
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico.
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Gupta M, Gupta S. An Overview of Selenium Uptake, Metabolism, and Toxicity in Plants. FRONTIERS IN PLANT SCIENCE 2017; 7:2074. [PMID: 28123395 PMCID: PMC5225104 DOI: 10.3389/fpls.2016.02074] [Citation(s) in RCA: 275] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 12/29/2016] [Indexed: 05/18/2023]
Abstract
Selenium (Se) is an essential micronutrient for humans and animals, but lead to toxicity when taken in excessive amounts. Plants are the main source of dietary Se, but essentiality of Se for plants is still controversial. However, Se at low doses protects the plants from variety of abiotic stresses such as cold, drought, desiccation, and metal stress. In animals, Se acts as an antioxidant and helps in reproduction, immune responses, thyroid hormone metabolism. Selenium is chemically similar to sulfur, hence taken up inside the plants via sulfur transporters present inside root plasma membrane, metabolized via sulfur assimilatory pathway, and volatilized into atmosphere. Selenium induced oxidative stress, distorted protein structure and function, are the main causes of Se toxicity in plants at high doses. Plants can play vital role in overcoming Se deficiency and Se toxicity in different regions of the world, hence, detailed mechanism of Se metabolism inside the plants is necessary for designing effective Se phytoremediation and biofortification strategies.
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Affiliation(s)
- Meetu Gupta
- Ecotoxicogenomics Lab, Department of Biotechnology, Jamia Millia IslamiaNew Delhi, India
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Perigone Lobe Transcriptome Analysis Provides Insights into Rafflesia cantleyi Flower Development. PLoS One 2016; 11:e0167958. [PMID: 27977777 PMCID: PMC5158018 DOI: 10.1371/journal.pone.0167958] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 11/23/2016] [Indexed: 11/19/2022] Open
Abstract
Rafflesia is a biologically enigmatic species that is very rare in occurrence and possesses an extraordinary morphology. This parasitic plant produces a gigantic flower up to one metre in diameter with no leaves, stem or roots. However, little is known about the floral biology of this species especially at the molecular level. In an effort to address this issue, we have generated and characterised the transcriptome of the Rafflesia cantleyi flower, and performed a comparison with the transcriptome of its floral bud to predict genes that are expressed and regulated during flower development. Approximately 40 million sequencing reads were generated and assembled de novo into 18,053 transcripts with an average length of 641 bp. Of these, more than 79% of the transcripts had significant matches to annotated sequences in the public protein database. A total of 11,756 and 7,891 transcripts were assigned to Gene Ontology categories and clusters of orthologous groups respectively. In addition, 6,019 transcripts could be mapped to 129 pathways in Kyoto Encyclopaedia of Genes and Genomes Pathway database. Digital abundance analysis identified 52 transcripts with very high expression in the flower transcriptome of R. cantleyi. Subsequently, analysis of differential expression between developing flower and the floral bud revealed a set of 105 transcripts with potential role in flower development. Our work presents a deep transcriptome resource analysis for the developing flower of R. cantleyi. Genes potentially involved in the growth and development of the R. cantleyi flower were identified and provide insights into biological processes that occur during flower development.
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Cieśla A, Mituła F, Misztal L, Fedorowicz-Strońska O, Janicka S, Tajdel-Zielińska M, Marczak M, Janicki M, Ludwików A, Sadowski J. A Role for Barley Calcium-Dependent Protein Kinase CPK2a in the Response to Drought. FRONTIERS IN PLANT SCIENCE 2016; 7:1550. [PMID: 27826303 PMCID: PMC5078816 DOI: 10.3389/fpls.2016.01550] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/03/2016] [Indexed: 05/30/2023]
Abstract
Increasing the drought tolerance of crops is one of the most challenging goals in plant breeding. To improve crop productivity during periods of water deficit, it is essential to understand the complex regulatory pathways that adapt plant metabolism to environmental conditions. Among various plant hormones and second messengers, calcium ions are known to be involved in drought stress perception and signaling. Plants have developed specific calcium-dependent protein kinases that convert calcium signals into phosphorylation events. In this study we attempted to elucidate the role of a calcium-dependent protein kinase in the drought stress response of barley (Hordeum vulgare L.), one of the most economically important crops worldwide. The ongoing barley genome project has provided useful information about genes potentially involved in the drought stress response, but information on the role of calcium-dependent kinases is still limited. We found that the gene encoding the calcium-dependent protein kinase HvCPK2a was significantly upregulated in response to drought. To better understand the role of HvCPK2a in drought stress signaling, we generated transgenic Arabidopsis plants that overexpressed the corresponding coding sequence. Overexpressing lines displayed drought sensitivity, reduced nitrogen balance index (NBI), an increase in total chlorophyll content and decreased relative water content. In addition, in vitro kinase assay experiments combined with mass spectrometry allowed HvCPK2a autophosphorylation sites to be identified. Our results suggest that HvCPK2a is a dual-specificity calcium-dependent protein kinase that functions as a negative regulator of the drought stress response in barley.
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Affiliation(s)
- Agata Cieśla
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | - Filip Mituła
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | - Lucyna Misztal
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | | | - Sabina Janicka
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | | | - Małgorzata Marczak
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | - Maciej Janicki
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | - Agnieszka Ludwików
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
| | - Jan Sadowski
- Biotechnology Department, Faculty of Biology, Adam Mickiewicz UniversityPoznań, Poland
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Jiang L, Chen Z, Gao Q, Ci L, Cao S, Han Y, Wang W. Loss-of-function mutations in the APX1 gene result in enhanced selenium tolerance in Arabidopsis thaliana. PLANT, CELL & ENVIRONMENT 2016; 39:2133-44. [PMID: 27149098 DOI: 10.1111/pce.12762] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 04/12/2016] [Accepted: 04/13/2016] [Indexed: 05/21/2023]
Abstract
It is generally recognized that excess selenium (Se) has a negative effect on the growth and development of plants. Numerous studies have identified key genes involved in selenium tolerance in plants; however, our understanding of its molecular mechanisms is far from complete. In this study, we isolated an Arabidopsis selenium-resistant mutant from the mutant XVE pool lines because of its increased root growth and fresh weight in Se stress, and cloned the gene, which encodes the cytosolic ascorbate peroxidase (APX1). Two other APX1 gene knockout allelic lines were also selenium resistant, and the APX1-complementary COM1 restored the growth state of wild type under Se stress. In addition, these APX1 allelic lines accumulated more Se than did wild-type plants when subjected to Se stress. Further analysis revealed that the APX1-mediated Se tolerance was associated, at least in part, with the enhanced activities of antioxidant enzymes catalase, glutathione peroxidase and glutathione reductase. Moreover, enhanced Se resistance of the mutants was associated with glutathione (GSH), which had the higher expression level of GSH1 gene involved in GSH synthesis and consequently increased GSH content. Our results provide genetic evidence indicating that loss-of-function of APX1 results in tolerance to Se stress.
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Affiliation(s)
- Li Jiang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China.
| | - Ziping Chen
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
- School of Life Science, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Qiuchen Gao
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Lingkun Ci
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Shuqing Cao
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Yi Han
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Weiyan Wang
- School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
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Ben Daniel BH, Cattan E, Wachtel C, Avrahami D, Glick Y, Malichy A, Gerber D, Miller G. Identification of novel transcriptional regulators of Zat12 using comprehensive yeast one-hybrid screens. PHYSIOLOGIA PLANTARUM 2016; 157:422-441. [PMID: 26923089 DOI: 10.1111/ppl.12439] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 01/22/2016] [Accepted: 01/28/2016] [Indexed: 06/05/2023]
Abstract
To appropriately acclimate to environmental stresses, plants have to rapidly activate a specific transcriptional program. Yet, the identity and function of many of the transcriptional regulators that mediate early responses to abiotic stress stimuli is still unknown. In this work we employed the promoter of the multi-stress-responsive zinc-finger protein Zat12 in yeast one-hybrid (Y1H) screens to identify early abiotic stress-responsive transcriptional regulators. Analysis of Zat12 promoter fragments fused to luciferase underlined an approximately 200 bp fragment responsive to NaCl and to reactive oxygen species (ROS). Using these segments and others as baits against Y1H control or stress Arabidopsis prey libraries, we identified 15 potential Zat12 transcriptional regulators. Among the prominent proteins identified were known transcription factors including bZIP29 and ANAC91 as well as unknown function proteins such as a homolog of the human USB1, a U6 small nuclear RNA (snRNA) processing protein, and dormancy/auxin-associated family protein 2 (DRM2). Altered expression of Zat12 during high light stress in the knockout mutants further indicated the involvement of these proteins in the regulation of Zat12. Using a state of the art microfluidic approach we showed that AtUSB1 and DRM2 can specifically bind dsDNA and were able to identify the preferred DNA-binding motif of all four proteins. Overall, the proteins identified in this work provide an important start point for charting the earliest signaling network of Zat12 and of other genes required for acclimation to abiotic stresses.
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Affiliation(s)
- Bat-Hen Ben Daniel
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Esther Cattan
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Chaim Wachtel
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Dorit Avrahami
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- The Nanotechnology Institute, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Yair Glick
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- The Nanotechnology Institute, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Asaf Malichy
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- The Nanotechnology Institute, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Doron Gerber
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
- The Nanotechnology Institute, The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, 5290002, Israel
| | - Gad Miller
- The Mina & Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, 5290002, Israel
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White PJ. Selenium accumulation by plants. ANNALS OF BOTANY 2016; 117:217-35. [PMID: 26718221 PMCID: PMC4724052 DOI: 10.1093/aob/mcv180] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/09/2015] [Accepted: 10/19/2015] [Indexed: 05/19/2023]
Abstract
BACKGROUND Selenium (Se) is an essential mineral element for animals and humans, which they acquire largely from plants. The Se concentration in edible plants is determined by the Se phytoavailability in soils. Selenium is not an essential element for plants, but excessive Se can be toxic. Thus, soil Se phytoavailability determines the ecology of plants. Most plants cannot grow on seleniferous soils. Most plants that grow on seleniferous soils accumulate <100 mg Se kg(-1) dry matter and cannot tolerate greater tissue Se concentrations. However, some plant species have evolved tolerance to Se, and commonly accumulate tissue Se concentrations >100 mg Se kg(-1) dry matter. These plants are considered to be Se accumulators. Some species can even accumulate Se concentrations of 1000-15 000 mg Se kg(-1 )dry matter and are called Se hyperaccumulators. SCOPE This article provides an overview of Se uptake, translocation and metabolism in plants and highlights the possible genetic basis of differences in these between and within plant species. The review focuses initially on adaptations allowing plants to tolerate large Se concentrations in their tissues and the evolutionary origin of species that hyperaccumulate Se. It then describes the variation in tissue Se concentrations between and within angiosperm species and identifies genes encoding enzymes limiting the rates of incorporation of Se into organic compounds and chromosomal loci that might enable the development of crops with greater Se concentrations in their edible portions. Finally, it discusses transgenic approaches enabling plants to tolerate greater Se concentrations in the rhizosphere and in their tissues. CONCLUSIONS The trait of Se hyperaccumulation has evolved several times in separate angiosperm clades. The ability to tolerate large tissue Se concentrations is primarily related to the ability to divert Se away from the accumulation of selenocysteine and selenomethionine, which might be incorporated into non-functional proteins, through the synthesis of less toxic Se metabilites. There is potential to breed or select crops with greater Se concentrations in their edible tissues, which might be used to increase dietary Se intakes of animals and humans.
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Affiliation(s)
- Philip J White
- Ecological Sciences Group, The James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK and Distinguished Scientist Fellowship Program, King Saud University, Riyadh 11451, Kingdom of Saudi Arabia
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Shanmugam V, Wang YW, Tsednee M, Karunakaran K, Yeh KC. Glutathione plays an essential role in nitric oxide-mediated iron-deficiency signaling and iron-deficiency tolerance in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 84:464-77. [PMID: 26333047 DOI: 10.1111/tpj.13011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 08/17/2015] [Accepted: 08/25/2015] [Indexed: 05/18/2023]
Abstract
Iron (Fe) deficiency is a common agricultural problem that affects both the productivity and nutritional quality of plants. Thus, identifying the key factors involved in the tolerance of Fe deficiency is important. In the present study, the zir1 mutant, which is glutathione deficient, was found to be more sensitive to Fe deficiency than the wild type, and grew poorly in alkaline soil. Other glutathione-deficient mutants also showed various degrees of sensitivity to Fe-limited conditions. Interestingly, we found that the glutathione level was increased under Fe deficiency in the wild type. By contrast, blocking glutathione biosynthesis led to increased physiological sensitivity to Fe deficiency. On the other hand, overexpressing glutathione enhanced the tolerance to Fe deficiency. Under Fe-limited conditions, glutathione-deficient mutants, zir1, pad2 and cad2 accumulated lower levels of Fe than the wild type. The key genes involved in Fe uptake, including IRT1, FRO2 and FIT, are expressed at low levels in zir1; however, a split-root experiment suggested that the systemic signals that govern the expression of Fe uptake-related genes are still active in zir1. Furthermore, we found that zir1 had a lower accumulation of nitric oxide (NO) and NO reservoir S-nitrosoglutathione (GSNO). Although NO is a signaling molecule involved in the induction of Fe uptake-related genes during Fe deficiency, the NO-mediated induction of Fe-uptake genes is dependent on glutathione supply in the zir1 mutant. These results provide direct evidence that glutathione plays an essential role in Fe-deficiency tolerance and NO-mediated Fe-deficiency signaling in Arabidopsis.
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Affiliation(s)
| | - Yi-Wen Wang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 11529, Taiwan
| | - Munkhtsetseg Tsednee
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 11529, Taiwan
| | - Krithika Karunakaran
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 11529, Taiwan
| | - Kuo-Chen Yeh
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, 11529, Taiwan
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Dimkovikj A, Fisher B, Hutchison K, Van Hoewyk D. Stuck between a ROS and a hard place: Analysis of the ubiquitin proteasome pathway in selenocysteine treated Brassica napus reveals different toxicities during selenium assimilation. JOURNAL OF PLANT PHYSIOLOGY 2015; 181:50-4. [PMID: 25974369 DOI: 10.1016/j.jplph.2015.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 04/13/2015] [Accepted: 04/13/2015] [Indexed: 05/26/2023]
Abstract
During the selenium assimilation pathway, inorganic selenate and selenite are reduced to form selenocysteine (Sec). Tolerance to selenium in plants has long been attributable to minimizing the replacement of cysteine with selenocysteine, which can result in nonspecific selenoproteins that are potentially misfolded. Despite this widely accepted assumption, there is no evidence in higher plants demonstrating that selenocysteine induces toxicity by resulting in malformed proteins. In this study, we use Brassica napus to analyze the ubiquitin-proteasome pathway, which is capable of removing misfolded proteins. Sec rapidly increased proteasome activity and levels of ubiquitinated proteins, strongly indicating that selenocysteine induces protein misfolding. Proteasome inhibition increased the amount of selenium in protein in Sec-treated plants. Collectively, these data provide a mechanism that accounts for Sec toxicity. Additionally, Sec did not cause oxidative stress as judged by examining levels of superoxide using fluorescent microscopy. Therefore, the cellular response to Sec is different compared to selenite, which was recently shown to increase antioxidant metabolism in response to elevated mitochondrial superoxide that ultimately impaired proteasome activity. Therefore, plants must contend with two divergent modes of cytotoxicity during selenium assimilation. Selenite can result in oxidative stress, but increased flux of selenite reduction can yield Sec that in turn can cause protein misfolding.
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Affiliation(s)
| | - Brian Fisher
- Biology Department, Coastal Carolina University, Conway, SC 29526, USA
| | - Kim Hutchison
- Department of Soil Science, North Carolina State University, Raleigh, NC 27695, USA
| | - Doug Van Hoewyk
- Biology Department, Coastal Carolina University, Conway, SC 29526, USA.
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Schild F, Kieffer-Jaquinod S, Palencia A, Cobessi D, Sarret G, Zubieta C, Jourdain A, Dumas R, Forge V, Testemale D, Bourguignon J, Hugouvieux V. Biochemical and biophysical characterization of the selenium-binding and reducing site in Arabidopsis thaliana homologue to mammals selenium-binding protein 1. J Biol Chem 2014; 289:31765-31776. [PMID: 25274629 PMCID: PMC4231655 DOI: 10.1074/jbc.m114.571208] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 09/17/2014] [Indexed: 12/19/2022] Open
Abstract
The function of selenium-binding protein 1 (SBP1), present in almost all organisms, has not yet been established. In mammals, SBP1 is known to bind the essential element selenium but the binding site has not been identified. In addition, the SBP family has numerous potential metal-binding sites that may play a role in detoxification pathways in plants. In Arabidopsis thaliana, AtSBP1 over-expression increases tolerance to two toxic compounds for plants, selenium and cadmium, often found as soil pollutants. For a better understanding of AtSBP1 function in detoxification mechanisms, we investigated the chelating properties of the protein toward different ligands with a focus on selenium using biochemical and biophysical techniques. Thermal shift assays together with inductively coupled plasma mass spectrometry revealed that AtSBP1 binds selenium after incubation with selenite (SeO3(2-)) with a ligand to protein molar ratio of 1:1. Isothermal titration calorimetry confirmed the 1:1 stoichiometry and revealed an unexpectedly large value of binding enthalpy suggesting a covalent bond between selenium and AtSBP1. Titration of reduced Cys residues and comparative mass spectrometry on AtSBP1 and the purified selenium-AtSBP1 complex identified Cys(21) and Cys(22) as being responsible for the binding of one selenium. These results were validated by site-directed mutagenesis. Selenium K-edge x-ray absorption near edge spectroscopy performed on the selenium-AtSBP1 complex demonstrated that AtSBP1 reduced SeO3(2-) to form a R-S-Se(II)-S-R-type complex. The capacity of AtSBP1 to bind different metals and selenium is discussed with respect to the potential function of AtSBP1 in detoxification mechanisms and selenium metabolism.
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Affiliation(s)
- Florie Schild
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Sylvie Kieffer-Jaquinod
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Biologie à Grande Echelle, Université Grenoble Alpes, CEA, INSERM, 17 rue des Martyrs, F-38000 Grenoble, France
| | - Andrés Palencia
- European Molecular Biology Laboratory Outstation, 71 avenue des Martyrs, F-38042 Grenoble, France and Unit for Virus Host-Cell Interactions, Université Grenoble Alpes-EMBL-CNRS, 71 avenue des Martyrs, 38042 France
| | - David Cobessi
- Université Grenoble Alpes, CEA, CNRS, Direction des Sciences du Vivant, Institut de Biologie Structurale, 6 rue Jules Horowitz, F-38044 Grenoble, France
| | - Géraldine Sarret
- Université Grenoble Alpes, CNRS & IRD, ISTerre, BP 53, F-38041 Grenoble, France
| | - Chloé Zubieta
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Agnès Jourdain
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Renaud Dumas
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Vincent Forge
- Laboratoire de Chimie et Biologie des Métaux, Université Grenoble Alpes, CEA, CNRS, Institut de Recherches en Technologies et Sciences pour le Vivant, 17 rue des Martyrs, F-38000 Grenoble, France, and
| | - Denis Testemale
- Université Grenoble Alpes, CNRS, Institut NEEL, 25 rue des Martyrs, F-38042 Grenoble, France
| | - Jacques Bourguignon
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359
| | - Véronique Hugouvieux
- Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire de Physiologie Cellulaire et Végétale, CEA, Université Grenoble Alpes, CNRS UMR5168, INRA USC1359,.
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Large-scale protein analysis of European beech trees following four vegetation periods of twice ambient ozone exposure. J Proteomics 2014; 109:417-35. [DOI: 10.1016/j.jprot.2014.05.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 03/24/2014] [Accepted: 05/01/2014] [Indexed: 01/02/2023]
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Moulis JM, Bourguignon J, Catty P. Cadmium. BINDING, TRANSPORT AND STORAGE OF METAL IONS IN BIOLOGICAL CELLS 2014. [DOI: 10.1039/9781849739979-00695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Cadmium is not an essential element for life. It is geologically marginal but anthropogenic activities have contributed significantly to its dispersion in the environment and to cadmium exposure of living species. The natural speciation of the divalent cation Cd2+ is dominated by its high propensity to bind to sulfur ligands, but Cd2+ may also occupy sites providing imidazole and carboxylate ligands. It binds to cell walls by passive adsorption (bio-sorption) and it may interact with surface receptors. Cellular uptake can occur by ion mimicry through a variety of transporters of essential divalent cations, but not always. Once inside cells, Cd2+ preferentially binds to thiol-rich molecules. It can accumulate in intracellular vesicles. It may also be transported over long distances within multicellular organisms and be trapped in locations devoid of efficient excretion systems. These locations include the renal cortex of animals and the leaves of hyper-accumulating plants. No specific regulatory mechanism monitors Cd2+ cellular concentrations. Thiol recruitment by cadmium is a major interference mechanism with many signalling pathways that rely on thiolate-disulfide equilibria and other redox-related processes. Cadmium thus compromises the antioxidant intracellular response that relies heavily on molecules with reactive thiolates. These biochemical features dominate cadmium toxicity, which is complex because of the diversity of the biological targets and the consequent pleiotropic effects. This chapter compares the cadmium-handling systems known throughout phylogeny and highlights the basic principles underlying the impact of cadmium in biology.
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Affiliation(s)
- Jean-Marc Moulis
- CEA, Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire Chimie et Biologie des Métaux 17 rue des Martyrs F-38054 Grenoble France
- CNRS UMR5249 F-38054 Grenoble France
- Université Joseph Fourier-Grenoble I UMR5249 F-38041 Grenoble France
| | - Jacques Bourguignon
- CEA, Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire Physiologie Cellulaire et Végétale F-38054 Grenoble France
- CNRS UMR5168 F-38054 Grenoble France
- Université Joseph Fourier-Grenoble I UMR5168 F-38041 Grenoble France
- INRA USC1359 F-38054 Grenoble France
| | - Patrice Catty
- CEA, Institut de Recherches en Technologies et Sciences pour le Vivant, Laboratoire Chimie et Biologie des Métaux 17 rue des Martyrs F-38054 Grenoble France
- CNRS UMR5249 F-38054 Grenoble France
- Université Joseph Fourier-Grenoble I UMR5249 F-38041 Grenoble France
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Gel-free proteomics reveal potential biomarkers of priming-induced salt tolerance in durum wheat. J Proteomics 2013; 91:486-99. [DOI: 10.1016/j.jprot.2013.08.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 07/19/2013] [Accepted: 08/12/2013] [Indexed: 11/18/2022]
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Van Hoewyk D. A tale of two toxicities: malformed selenoproteins and oxidative stress both contribute to selenium stress in plants. ANNALS OF BOTANY 2013; 112:965-72. [PMID: 23904445 PMCID: PMC3783228 DOI: 10.1093/aob/mct163] [Citation(s) in RCA: 129] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 05/28/2013] [Indexed: 05/06/2023]
Abstract
BACKGROUND Despite selenium's toxicity in plants at higher levels, crops supply most of the essential dietary selenium in humans. In plants, inorganic selenium can be assimilated into selenocysteine, which can replace cysteine in proteins. Selenium toxicity in plants has been attributed to the formation of non-specific selenoproteins. However, this paradigm can be challenged now that there is increasingly abundant evidence suggesting that selenium-induced oxidative stress also contributes to toxicity in plants. SCOPE This Botanical Briefing summarizes the evidence indicating that selenium toxicity in plants is attributable to both the accumulation of non-specific selenoproteins and selenium-induced oxidative stress. Evidence is also presented to substantiate the claim that inadvertent selenocysteine replacement probably impairs or misfolds proteins, which supports the malformed selenoprotein hypothesis. The possible physiological ramifications of selenoproteins and selenium-induced oxidative stress are discussed. CONCLUSIONS Malformed selenoproteins and oxidative stress are two distinct types of stress that drive selenium toxicity in plants and could impact cellular processes in plants that have yet to be thoroughly explored. Although challenging, deciphering whether the extent of selenium toxicity in plants is imparted by selenoproteins or oxidative stress could be helpful in the development of crops with fortified levels of selenium.
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Affiliation(s)
- Doug Van Hoewyk
- Coastal Carolina University, Biology Department, Conway, SC 29526, USA
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Yang LT, Qi YP, Lu YB, Guo P, Sang W, Feng H, Zhang HX, Chen LS. iTRAQ protein profile analysis of Citrus sinensis roots in response to long-term boron-deficiency. J Proteomics 2013; 93:179-206. [PMID: 23628855 DOI: 10.1016/j.jprot.2013.04.025] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2012] [Revised: 04/09/2013] [Accepted: 04/16/2013] [Indexed: 12/24/2022]
Abstract
UNLABELLED Seedlings of Citrus sinensis were fertilized with boron (B)-deficient (0μM H3BO3) or -sufficient (10μM H3BO3) nutrient solution for 15weeks. Thereafter, iTRAQ analysis was employed to compare the abundances of proteins from B-deficient and -sufficient roots. In B-deficient roots, 164 up-regulated and 225 down-regulated proteins were identified. These proteins were grouped into the following functional categories: protein metabolism, nucleic acid metabolism, stress responses, carbohydrate and energy metabolism, cell transport, cell wall and cytoskeleton metabolism, biological regulation and signal transduction, and lipid metabolism. The adaptive responses of roots to B-deficiency might include following several aspects: (a) decreasing root respiration; (b) improving the total ability to scavenge reactive oxygen species (ROS); and (c) enhancing cell transport. The differentially expressed proteins identified by iTRAQ are much larger than those detected using 2D gel electrophoresis, and many novel B-deficiency-responsive proteins involved in cell transport, biological regulation and signal transduction, stress responses and other metabolic processes were identified in this work. Our results indicate remarkable metabolic flexibility of citrus roots, which may contribute to the survival of B-deficient plants. This represents the most comprehensive analysis of protein profiles in response to B-deficiency. BIOLOGICAL SIGNIFICANCE In this study, we identified many new proteins involved in cell transport, biological regulation and signal transduction, stress responses and other metabolic processes that were not previously known to be associated with root B-deficiency responses. Therefore, our manuscript represents the most comprehensive analysis of protein profiles in response to B-deficiency and provides new information about the plant response to B-deficiency. This article is part of a Special Issue entitled: Translational Plant Proteomics.
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Affiliation(s)
- Lin-Tong Yang
- College of Resources and Environmental Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Kreft I, Mechora Š, Germ M, Stibilj V. Impact of selenium on mitochondrial activity in young Tartary buckwheat plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 63:196-199. [PMID: 23274247 DOI: 10.1016/j.plaphy.2012.11.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 11/20/2012] [Indexed: 06/01/2023]
Abstract
To investigate the impact of Se on Tartary buckwheat (Fagopyrum tataricum Gaertn.) plants, the plant foliage was sprayed with 10 mg Se(VI) L(-1) at the beginning of flowering. The Se was effectively assimilated by the plants and taken into the seeds, where its concentration was more than double that in untreated plants. The seeds were collected and sown to obtain the progeny of these Se-treated plants. To assess the physiological characteristics of control plants and these Se-treated progeny plants, the estimated respiratory potential via electron transport system (ETS) activity and the photochemical efficiency of photosystem II were measured. Three weeks after germination, the Se-treated progeny plants showed higher ETS activity compared to the controls. Through weeks 4 and 5, this high ETS activity approximately halved, and the difference in ETS activity seen at 3 weeks was lost. On the other hand, at week 4, the potential photochemical efficiency was higher in the Se-treated progeny plants than the controls. In adult plants, the leaves dry mass was significantly greater in the Se-treated progeny plants than the controls. This study demonstrates an impact of Se in Tartary buckwheat on the progeny plants of Se sprayed plants, as shown previously in pea plants.
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Affiliation(s)
- Ivan Kreft
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
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Liao D, Pajak A, Karcz SR, Chapman BP, Sharpe AG, Austin RS, Datla R, Dhaubhadel S, Marsolais F. Transcripts of sulphur metabolic genes are co-ordinately regulated in developing seeds of common bean lacking phaseolin and major lectins. JOURNAL OF EXPERIMENTAL BOTANY 2012; 63:6283-95. [PMID: 23066144 PMCID: PMC3481216 DOI: 10.1093/jxb/ers280] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The lack of phaseolin and phytohaemagglutinin in common bean (dry bean, Phaseolus vulgaris) is associated with an increase in total cysteine and methionine concentrations by 70% and 10%, respectively, mainly at the expense of an abundant non-protein amino acid, S-methyl-cysteine. Transcripts were profiled between two genetically related lines differing for this trait at four stages of seed development using a high density microarray designed for common bean. Transcripts of multiple sulphur-rich proteins were elevated, several previously identified by proteomics, including legumin, basic 7S globulin, albumin-2, defensin, albumin-1, the Bowman-Birk type proteinase inhibitor, the double-headed trypsin inhibitor, and the Kunitz trypsin inhibitor. A co-ordinated regulation of transcripts coding for sulphate transporters, sulphate assimilatory enzymes, serine acetyltransferases, cystathionine β-lyase, homocysteine S-methyltransferase and methionine gamma-lyase was associated with changes in cysteine and methionine concentrations. Differential gene expression of sulphur-rich proteins preceded that of sulphur metabolic enzymes, suggesting a regulation by demand from the protein sink. Up-regulation of SERAT1;1 and -1;2 expression revealed an activation of cytosolic O-acetylserine biosynthesis. Down-regulation of SERAT2;1 suggested that cysteine and S-methyl-cysteine biosynthesis may be spatially separated in different subcellular compartments. Analysis of free amino acid profiles indicated that enhanced cysteine biosynthesis was correlated with a depletion of O-acetylserine. These results contribute to our understanding of the regulation of sulphur metabolism in developing seed in response to a change in the composition of endogenous proteins.
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Affiliation(s)
- Dengqun Liao
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
| | - Agnieszka Pajak
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
| | - Steven R. Karcz
- Agriculture and Agri-Food Canada, Bioproducts and Bioprocesses, Saskatoon Research Centre, 107 Science Place, Saskatoon, Saskatchewan S7N 0X2, Canada
| | - B. Patrick Chapman
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
| | - Andrew G. Sharpe
- National Research Council Canada, Plant Biotechnology Institute, 110 Gymnasium Place, Saskatoon, Saskatchewan S7N 0W9, Canada
| | - Ryan S. Austin
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
| | - Raju Datla
- National Research Council Canada, Plant Biotechnology Institute, 110 Gymnasium Place, Saskatoon, Saskatchewan S7N 0W9, Canada
| | - Sangeeta Dhaubhadel
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
- Department of Biology, University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Frédéric Marsolais
- Agriculture and Agri-Food Canada, Genomics and Biotechnology, Southern Crop Protection and Food Research Centre, 1391 Sandford St., London, Ontario N5V 4T3, Canada
- Department of Biology, University of Western Ontario, London, Ontario N6A 5B7, Canada
- * To whom correspondence should be addressed. E-mail:
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Zhu H, Xia R, Zhao B, An YQ, Dardick CD, Callahan AM, Liu Z. Unique expression, processing regulation, and regulatory network of peach (Prunus persica) miRNAs. BMC PLANT BIOLOGY 2012; 12:149. [PMID: 22909020 PMCID: PMC3542160 DOI: 10.1186/1471-2229-12-149] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 08/13/2012] [Indexed: 05/19/2023]
Abstract
BACKGROUND MicroRNAs (miRNAs) have recently emerged as important gene regulators in plants. MiRNAs and their targets have been extensively studied in Arabidopsis and rice. However, relatively little is known about the characterization of miRNAs and their target genes in peach (Prunus persica), which is a complex crop with unique developmental programs. RESULTS We performed small RNA deep sequencing and identified 47 peach-specific and 47 known miRNAs or families with distinct expression patterns. Together, the identified miRNAs targeted 80 genes, many of which have not been reported previously. Like the model plant systems, peach has two of the three conserved trans-acting siRNA biogenesis pathways with similar mechanistic features and target specificity. Unique to peach, three of the miRNAs collectively target 49 MYBs, 19 of which are known to regulate phenylpropanoid metabolism, a key pathway associated with stone hardening and fruit color development, highlighting a critical role of miRNAs in the regulation of peach fruit development and ripening. We also found that the majority of the miRNAs were differentially regulated in different tissues, in part due to differential processing of miRNA precursors. Up to 16% of the peach-specific miRNAs were differentially processed from their precursors in a tissue specific fashion, which has been rarely observed in plant cells. The miRNA precursor processing activity appeared not to be coupled with its transcriptional activity but rather acted independently in peach. CONCLUSIONS Collectively, the data characterizes the unique expression pattern and processing regulation of peach miRNAs and demonstrates the presence of a complex, multi-level miRNA regulatory network capable of targeting a wide variety of biological functions, including phenylpropanoid pathways which play a multifaceted spatial-temporal role in peach fruit development.
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Affiliation(s)
- Hong Zhu
- Department of Horticulture, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV, 25430, USA
| | - Rui Xia
- Department of Horticulture, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
- Alson H. Smith Agricultural Research and Extension Center, Virginia Polytechnic Institute and State University, Winchester, VA, 22602, USA
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV, 25430, USA
| | - Bingyu Zhao
- Department of Horticulture, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
| | - Yong-qiang An
- USDA-ARS, Plant Genetic Research, Danforth Plant Science Center, 975 N. Warson Road, St. Louis, MO, 63132, USA
| | - Chris D Dardick
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV, 25430, USA
| | - Ann M Callahan
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV, 25430, USA
| | - Zongrang Liu
- Department of Horticulture, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA
- Appalachian Fruit Research Station, Agricultural Research Service, United States Department of Agriculture, Kearneysville, WV, 25430, USA
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