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Murgia I, Morandini P. Plant Iron Research in African Countries: Current "Hot Spots", Approaches, and Potentialities. PLANTS (BASEL, SWITZERLAND) 2023; 13:14. [PMID: 38202322 PMCID: PMC10780554 DOI: 10.3390/plants13010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/14/2023] [Accepted: 12/17/2023] [Indexed: 01/12/2024]
Abstract
Plant iron (Fe) nutrition and metabolism is a fascinating and challenging research topic; understanding the role of Fe in the life cycle of plants requires knowledge of Fe chemistry and biochemistry and their impact during development. Plant Fe nutritional status is dependent on several factors, including the surrounding biotic and abiotic environments, and influences crop yield and the nutritional quality of edible parts. The relevance of plant Fe research will further increase globally, particularly for Africa, which is expected to reach 2.5 billion people by 2050. The aim of this review is to provide an updated picture of plant Fe research conducted in African countries to favor its dissemination within the scientific community. Three main research hotspots have emerged, and all of them are related to the production of plants of superior quality, i.e., development of Fe-dense crops, development of varieties resilient to Fe toxicity, and alleviation of Fe deficiency, by means of Fe nanoparticles for sustainable agriculture. An intensification of research collaborations between the African research groups and plant Fe groups worldwide would be beneficial for the progression of the identified research topics.
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Affiliation(s)
- Irene Murgia
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy;
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2
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Chen G, Taherymoosavi S, Cheong S, Yin Y, Akter R, Marjo CE, Rich AM, Mitchell DRG, Fan X, Chew J, Pan G, Li L, Bian R, Horvat J, Mohammed M, Munroe P, Joseph S. Advanced characterization of biomineralization at plaque layer and inside rice roots amended with iron- and silica-enhanced biochar. Sci Rep 2021; 11:159. [PMID: 33420245 PMCID: PMC7794488 DOI: 10.1038/s41598-020-80377-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 12/16/2020] [Indexed: 01/29/2023] Open
Abstract
Application of iron (Fe)- and silica (Si)-enhanced biochar compound fertilisers (BCF) stimulates rice yield by increasing plant uptake of mineral nutrients. With alterations of the nutrient status in roots, element homeostasis (e.g., Fe) in the biochar-treated rice root was related to the formation of biominerals on the plaque layer and in the cortex of roots. However, the in situ characteristics of formed biominerals at the micron and sub-micron scale remain unknown. In this study, rice seedlings (Oryza sativa L.) were grown in paddy soil treated with BCF and conventional fertilizer, respectively, for 30 days. The biochar-induced changes in nutrient accumulation in roots, and the elemental composition, distribution and speciation of the biomineral composites formed in the biochar-treated roots at the micron and sub-micron scale, were investigated by a range of techniques. Results of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) showed that biochar treatment significantly increased concentrations of nutrients (e.g., Fe, Si, and P) inside the root. Raman mapping and vibrating sample magnetometry identified biochar particles and magnetic Fe nanoparticles associated with the roots. With Fe plaque formation, higher concentrations of FeOx- and FeOxH- anions on the root surface than the interior were detected by time-of-flight secondary ionization mass spectrometry (ToF-SIMS). Analysis of data from scanning electron microscopy energy-dispersive spectroscopy (SEM-EDS), and from scanning transmission electron microscopy (STEM) coupled with EDS or energy electron loss spectroscopy (EELS), determined that Fe(III) oxide nanoparticles were accumulated in the crystalline fraction of the plaque and were co-localized with Si and P on the root surface. Iron-rich nanoparticles (Fe-Si nanocomposites with mixed oxidation states of Fe and ferritin) in the root cortex were identified by using aberration-corrected STEM and in situ EELS analysis, confirming the biomineralization and storage of Fe in the rice root. The findings from this study highlight that the deposition of Fe-rich nanocomposites occurs with contrasting chemical speciation in the Fe plaque and cortex of the rice root. This provides an improved understanding of the element homeostasis in rice with biochar-mineral fertilization.
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Affiliation(s)
- Guanhong Chen
- grid.464309.c0000 0004 6431 5677National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-Environmental Pollution Control and Management, Institute of Eco-Environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650 China
| | - Sarasadat Taherymoosavi
- grid.1005.40000 0004 4902 0432School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 Australia
| | - Soshan Cheong
- grid.1005.40000 0004 4902 0432Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052 Australia
| | - Yao Yin
- grid.1005.40000 0004 4902 0432Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052 Australia
| | - Rabeya Akter
- grid.1005.40000 0004 4902 0432Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052 Australia
| | - Christopher E. Marjo
- grid.1005.40000 0004 4902 0432Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052 Australia
| | - Anne M. Rich
- grid.1005.40000 0004 4902 0432Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052 Australia
| | - David R. G. Mitchell
- grid.1007.60000 0004 0486 528XElectron Microscopy Centre, AIIM Building, Innovation Campus, University of Wollongong, North Wollongong, NSW 2517 Australia
| | - Xiaorong Fan
- grid.27871.3b0000 0000 9750 7019College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095 China
| | - Jinkiat Chew
- grid.27871.3b0000 0000 9750 7019College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095 China
| | - Genxing Pan
- grid.27871.3b0000 0000 9750 7019College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095 China
| | - Lianqing Li
- grid.27871.3b0000 0000 9750 7019College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095 China
| | - Rongjun Bian
- grid.27871.3b0000 0000 9750 7019College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095 China
| | - Joseph Horvat
- grid.1007.60000 0004 0486 528XInstitute for Superconducting and Electronic Materials and School of Physics, University of Wollongong, Wollongong, NSW 2522 Australia
| | - Mohanad Mohammed
- grid.1007.60000 0004 0486 528XInstitute for Superconducting and Electronic Materials and School of Physics, University of Wollongong, Wollongong, NSW 2522 Australia
| | - Paul Munroe
- grid.1005.40000 0004 4902 0432School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 Australia
| | - Stephen Joseph
- grid.1005.40000 0004 4902 0432School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 Australia ,grid.1007.60000 0004 0486 528XInstitute for Superconducting and Electronic Materials and School of Physics, University of Wollongong, Wollongong, NSW 2522 Australia
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Kosakivska IV, Babenko LM, Romanenko KO, Korotka IY, Potters G. Molecular mechanisms of plant adaptive responses to heavy metals stress. Cell Biol Int 2020; 45:258-272. [PMID: 33200493 DOI: 10.1002/cbin.11503] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/21/2020] [Accepted: 11/11/2020] [Indexed: 12/29/2022]
Abstract
Heavy metals (HMs) are among the main environmental pollutants that can enter the soil, water bodies, and the atmosphere as a result of natural processes (weathering of rocks, volcanic activity), and also as a result of human activities (mining, metallurgical and chemical industries, transport, application of mineral fertilizers). Plants counteract the HMs stresses through morphological and physiological adaptations, which are imparted through well-coordinated molecular mechanisms. New approaches, which include transcriptomics, genomics, proteomics, and metabolomics analyses, have opened the paths to understand such complex networks. This review sheds light on molecular mechanisms included in plant adaptive and defense responses during metal stress. It is focused on the entry of HMs into plants, its transport and accumulation, effects on the main physiological processes, gene expressions included in plant adaptive and defense responses during HM stress. Analysis of new data allowed the authors to conclude that the most important mechanism of HM tolerance is extracellular and intracellular HM sequestration. Organic anions (malate, oxalate, etc.) provide extracellular sequestration of HM ions. Intracellular HM sequestration depends not only on a direct binding mechanism with different polymers (pectin, lignin, cellulose, hemicellulose, etc.) or organic anions but also on the action of cellular receptors and transmembrane transporters. We focused on the functioning chloroplasts, mitochondria, and the Golgi complex under HM stress. The currently known molecular mechanisms of plant tolerance to the toxic effects of HMs are analyzed.
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Affiliation(s)
- Iryna V Kosakivska
- Phytohormonology Department, M. G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Lidia M Babenko
- Phytohormonology Department, M. G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Kateryna O Romanenko
- Phytohormonology Department, M. G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Iryna Y Korotka
- Phytohormonology Department, M. G. Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Geert Potters
- Department of Phytohormonology, Antwerp Maritime Academy, Antwerp, Belgium
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de la Fuente V, Rufo L, Rodríguez N, Ramírez E, Sánchez-Gavilán I, Amils R. Differential iron management in monocotyledon and dicotyledon plants from the Río Tinto basin. PROTOPLASMA 2020; 257:889-900. [PMID: 31909435 DOI: 10.1007/s00709-019-01476-x] [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: 06/06/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
The study of plants adapted to an extreme environment with a high concentration of iron such as Río Tinto allowed the study of important elements for the development and control of plant growth including their localization, management, and storage. The absorption, transport, and accumulation of iron were studied in different species of dicotyledons (Sarcocornia pruinosa, Salicornia patula, Arthrocnemum macrostachyum, and Halogeton sativus of the Chenopodiaceae family) and monocotyledons (Imperata cylindrica, Cynodon dactylon, and Panicum repens from the Poaceae family), all obtained from the Río Tinto banks in different sample collection campaigns. The results clearly show that phytoferritin is not observed in the chloroplast of monocotyledons, an important difference from what is observed in dicotyledons. The presence of plastids with a high concentration of iron in the sieve tubes of monocotyledons strongly suggests their possible role in the transport and accumulation of iron in these plants.
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Affiliation(s)
- V de la Fuente
- Departamento de Biología, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E28049, Madrid, Spain.
| | - L Rufo
- Instituto de Investigaciones Biosanitarias, Facultad de Ciencias Experimentales, Universidad Francisco de Vitoria, Pozuelo de Alarcón, Madrid, Spain
| | - N Rodríguez
- Centro de Astrobiología, INTA-CSIC, Torrejón de Ardoz, Madrid, Spain
| | - E Ramírez
- Departamento de Biología, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E28049, Madrid, Spain
| | - I Sánchez-Gavilán
- Departamento de Biología, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E28049, Madrid, Spain
| | - R Amils
- Centro de Biología Molecular Severo Ochoa (UAM-CSIC), Universidad Autónoma de Madrid, Cantoblanco, Madrid, Spain
- Centro de Astrobiología, INTA-CSIC, Torrejón de Ardoz, Madrid, Spain
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5
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Vigani G, Solti ÏDM, Thomine SB, Philippar K. Essential and Detrimental - an Update on Intracellular Iron Trafficking and Homeostasis. PLANT & CELL PHYSIOLOGY 2019; 60:1420-1439. [PMID: 31093670 DOI: 10.1093/pcp/pcz091] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 05/06/2019] [Indexed: 05/22/2023]
Abstract
Chloroplasts, mitochondria and vacuoles represent characteristic organelles of the plant cell, with a predominant function in cellular metabolism. Chloroplasts are the site of photosynthesis and therefore basic and essential for photoautotrophic growth of plants. Mitochondria produce energy during respiration and vacuoles act as internal waste and storage compartments. Moreover, chloroplasts and mitochondria are sites for the biosynthesis of various compounds of primary and secondary metabolism. For photosynthesis and energy generation, the internal membranes of chloroplasts and mitochondria are equipped with electron transport chains. To perform proper electron transfer and several biosynthetic functions, both organelles contain transition metals and here iron is by far the most abundant. Although iron is thus essential for plant growth and development, it becomes toxic when present in excess and/or in its free, ionic form. The harmful effect of the latter is caused by the generation of oxidative stress. As a consequence, iron transport and homeostasis have to be tightly controlled during plant growth and development. In addition to the corresponding transport and homeostasis proteins, the vacuole plays an important role as an intracellular iron storage and release compartment at certain developmental stages. In this review, we will summarize current knowledge on iron transport and homeostasis in chloroplasts, mitochondria and vacuoles. In addition, we aim to integrate the physiological impact of intracellular iron homeostasis on cellular and developmental processes.
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Affiliation(s)
- Gianpiero Vigani
- Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, via Quarello 15/A, Turin I, Italy
| | - Ï Dï M Solti
- Department of Plant Physiology and Molecular Plant Biology, E�tv�s Lor�nd University, Budapest H, Hungary
| | - Sï Bastien Thomine
- Institut de Biologie Int�grative de la Cellule, CNRS, Avenue de la Terrasse, Gif-sur-Yvette, France
| | - Katrin Philippar
- Plant Biology, Center for Human- and Molecular Biology (ZHMB), Saarland University, Campus A2.4, Saarbr�cken D, Germany
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Wu Q, Wu WS, Su L, Zheng X, Wu WY, Santambrogio P, Gou YJ, Hao Q, Wang PN, Li YR, Zhao BL, Nie G, Levi S, Chang YZ. Mitochondrial Ferritin Is a Hypoxia-Inducible Factor 1α-Inducible Gene That Protects from Hypoxia-Induced Cell Death in Brain. Antioxid Redox Signal 2019; 30:198-212. [PMID: 29402144 DOI: 10.1089/ars.2017.7063] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aims: Mitochondrial ferritin (protein [FtMt]) is preferentially expressed in cell types of high metabolic activity and oxygen consumption, which is consistent with its role of sequestering iron and preventing oxygen-derived redox damage. As of yet, the mechanisms of FtMt regulation and the protection FtMt affords remain largely unknown. Results: Here, we report that hypoxia-inducible factor 1α (HIF-1α) can upregulate FtMt expression. We verify one functional hypoxia-response element (HRE) in the positive regulatory region and two HREs possessing HIF-1α binding activity in the minimal promoter region of the human FTMT gene. We also demonstrate that FtMt can alleviate hypoxia-induced brain cell death by sequestering uncommitted iron, whose levels increase with hypoxia in these cells. Innovation: In the absence of FtMt, this catalytic metal excess catalyzes the production of cytotoxic reactive oxygen species. Conclusion: Thus, the cell ability to increase expression of FtMt during hypoxia may be a skill to avoid tissue damage derived from oxygen limitation.
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Affiliation(s)
- Qiong Wu
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China .,2 Division of Neuroscience, San Raffaele Scientific Institute , Milano, Italy .,3 College of Basic Medicine, Hebei University of Chinese Medicine , Shijiazhuang, China .,4 Department of Clinical Laboratory, The Third Hospital of Hebei Medical University , Shijiazhuang, China
| | - Wen-Shuang Wu
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China .,3 College of Basic Medicine, Hebei University of Chinese Medicine , Shijiazhuang, China .,4 Department of Clinical Laboratory, The Third Hospital of Hebei Medical University , Shijiazhuang, China
| | - Lin Su
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Xin Zheng
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Wen-Yue Wu
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Paolo Santambrogio
- 2 Division of Neuroscience, San Raffaele Scientific Institute , Milano, Italy
| | - Yu-Jing Gou
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Qian Hao
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Pei-Na Wang
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Ya-Ru Li
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Bao-Lu Zhao
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
| | - Guangjun Nie
- 5 CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology , Beijing, China
| | - Sonia Levi
- 2 Division of Neuroscience, San Raffaele Scientific Institute , Milano, Italy .,6 Vita-Salute San Raffaele University , Milano, Italy
| | - Yan-Zhong Chang
- 1 Laboratory of Molecular Iron Metabolism, The Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Science, Hebei Normal University , Shijiazhuang, China
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Migocka M, Maciaszczyk-Dziubinska E, Małas K, Posyniak E, Garbiec A. Metal tolerance protein MTP6 affects mitochondrial iron and manganese homeostasis in cucumber. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:285-300. [PMID: 30304441 PMCID: PMC6305187 DOI: 10.1093/jxb/ery342] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Accepted: 09/24/2018] [Indexed: 05/24/2023]
Abstract
Members of the cation diffusion facilitator (CDF) family have been identified in all kingdoms of life. They have been divided into three subgroups, namely Zn-CDF, Fe/Zn-CDF, and Mn-CDF, based on their putative specificity to transported metal ions. The plant metal tolerance protein 6 (MTP6) proteins fall into the Fe/Zn-CDF subgroup; however, their function in iron/zinc transport has not yet been confirmed. Here, we characterized the MTP6 protein from cucumber, Cucumis sativus. When expressed in yeast and in protoplasts isolated from Arabidopsis cells, CsMTP6 localized in mitochondria and contributed to the efflux of Fe and Mn from these organelles. Immunolocalization of CsMTP6 in cucumber membranes confirmed this association with mitochondria. Root expression and protein levels of CsMTP6 were significantly up-regulated in conditions of Fe deficiency and excess, but were not affected by Mn availability. These results indicate that MTP6 proteins contribute to the distribution of Fe and Mn between the cytosol and mitochondria of plant cells, and are regulated by Fe to maintain mitochondrial and cytosolic iron homeostasis under varying conditions of Fe availability.
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Affiliation(s)
- Magdalena Migocka
- University of Wroclaw, Institute of Experimental Biology, Department of Plant Molecular Physiology, Kanonia, Wroclaw, Poland
| | - Ewa Maciaszczyk-Dziubinska
- University of Wroclaw, Institute of Experimental Biology, Department of Genetics and Cell Physiology, Kanonia, Wroclaw, Poland
| | - Karolina Małas
- University of Wroclaw, Institute of Experimental Biology, Department of Plant Molecular Physiology, Kanonia, Wroclaw, Poland
| | - Ewelina Posyniak
- University of Wroclaw, Institute of Experimental Biology, Department of Animal Developmental Biology, Sienkiewicza, Wroclaw, Poland
| | - Arnold Garbiec
- University of Wroclaw, Institute of Experimental Biology, Department of Animal Developmental Biology, Sienkiewicza, Wroclaw, Poland
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Migocka M, Małas K, Maciaszczyk-Dziubinska E, Papierniak A, Posyniak E, Garbiec A. Cucumber metal tolerance protein 7 (CsMTP7) is involved in the accumulation of Fe in mitochondria under Fe excess. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 95:988-1003. [PMID: 29932267 DOI: 10.1111/tpj.14006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 06/04/2018] [Accepted: 06/14/2018] [Indexed: 06/08/2023]
Abstract
The plant metal tolerance protein family (MTP) includes 12 members that have been classified into three phylogenetically different subgroups - Zn-cation diffusion facilitator (CDF), Fe/Zn-CDF and Mn-CDF - based on their putative metal specificity. To date, only members belonging to the Zn-CDF or Mn-CDF group have been characterized functionally. The plant Fe/Zn-CDF subgroup includes two proteins, MTP6 and MTP7, but their function and metal specificity have not been confirmed. In this study we showed that cucumber CsMTP7 is a highly specific mitochondrial Fe importer that is able to confer yeast tolerance to Fe excess through increased accumulation of Fe in the mitochondria. We also demonstrated that CsMTP7 contributes to the increased accumulation of Fe in the mitochondria of Arabidopsis thaliana protoplasts. The transcripts and mitochondrial levels of CsMTP7 and ferritin - the iron-storing protein - are significantly increased in cucumber roots in response to Fe excess. This finding suggests that CsMTP7 and ferritin work in concert to accumulate Fe in plant mitochondria. As genes that encode orthologous proteins have been identified in phylogenetically distant organisms, including Archaea, cyanobacteria, humans and plants, but not in yeast, we concluded that the MTP7-mediated mitochondrial Fe accumulation may be conserved in the species, and express mitochondrial ferritin for mitochondrial Fe storage.
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Affiliation(s)
- Magdalena Migocka
- Department of Plant Molecular Physiology, Institute of Experimental Biology, Wroclaw University, Kanonia 6/8, 50-328, Wroclaw, Poland
| | - Karolina Małas
- Department of Plant Molecular Physiology, Institute of Experimental Biology, Wroclaw University, Kanonia 6/8, 50-328, Wroclaw, Poland
| | - Ewa Maciaszczyk-Dziubinska
- Department of Genetics and Cell Physiology, Institute of Experimental Biology, Wroclaw University, Kanonia 6/8, 50-328, Wroclaw, Poland
| | - Anna Papierniak
- Department of Plant Molecular Physiology, Institute of Experimental Biology, Wroclaw University, Kanonia 6/8, 50-328, Wroclaw, Poland
| | - Ewelina Posyniak
- Department of Animal Developmental Biology, Institute of Experimental Biology, Wroclaw University, Sienkiewicza 21, 50-335, Wroclaw, Poland
| | - Arnold Garbiec
- Department of Animal Developmental Biology, Institute of Experimental Biology, Wroclaw University, Sienkiewicza 21, 50-335, Wroclaw, Poland
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9
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Cao K, Lai F, Zhao XL, Wei QX, Miao XY, Ge R, He QY, Sun X. The mechanism of iron-compensation for manganese deficiency of Streptococcus pneumoniae. J Proteomics 2018; 184:62-70. [DOI: 10.1016/j.jprot.2018.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/17/2018] [Accepted: 06/07/2018] [Indexed: 12/18/2022]
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10
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Yu X, Luo Q, Huang K, Yang G, He G. Prospecting for Microelement Function and Biosafety Assessment of Transgenic Cereal Plants. FRONTIERS IN PLANT SCIENCE 2018; 9:326. [PMID: 29599791 PMCID: PMC5862831 DOI: 10.3389/fpls.2018.00326] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/27/2018] [Indexed: 05/26/2023]
Abstract
Microelement contents and metabolism are vitally important for cereal plant growth and development as well as end-use properties. While minerals phytotoxicity harms plants, microelement deficiency also affects human health. Genetic engineering provides a promising way to solve these problems. As plants vary in abilities to uptake, transport, and accumulate minerals, and the key enzymes acting on that process is primarily presented in this review. Subsequently, microelement function and biosafety assessment of transgenic cereal plants have become a key issue to be addressed. Progress in genetic engineering of cereal plants has been made with the introduction of quality, high-yield, and resistant genes since the first transgenic rice, corn, and wheat were born in 1988, 1990, and 1992, respectively. As the biosafety issue of transgenic cereal plants has now risen to be a top concern, many studies on transgenic biosafety have been carried out. Transgenic cereal biosafety issues mainly include two subjects, environmental friendliness and end-use safety. Different levels of gene confirmation, genomics, proteomics, metabolomics and nutritiomics, absorption, metabolism, and function have been investigated. Also, the different levels of microelement contents have been measured in transgenic plants. Based on the motivation of the requested biosafety, systematic designs, and analysis of transgenic cereal are also presented in this review paper.
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Affiliation(s)
- Xiaofen Yu
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Qingchen Luo
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Kaixun Huang
- School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, Wuhan, China
| | - Guangxiao Yang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
| | - Guangyuan He
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science & Technology, Wuhan, China
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11
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Vigani G, Bohic S, Faoro F, Vekemans B, Vincze L, Terzano R. Cellular Fractionation and Nanoscopic X-Ray Fluorescence Imaging Analyses Reveal Changes of Zinc Distribution in Leaf Cells of Iron-Deficient Plants. FRONTIERS IN PLANT SCIENCE 2018; 9:1112. [PMID: 30123229 PMCID: PMC6085429 DOI: 10.3389/fpls.2018.01112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/10/2018] [Indexed: 05/07/2023]
Abstract
Multilevel interactions among nutrients occur in the soil-plant system. Among them, Fe and Zn homeostasis in plants are of great relevance because of their importance for plant and human nutrition. However, the mechanisms underlying the interplay between Fe and Zn in plants are still poorly understood. In order to elucidate how Zn interacts with Fe homeostasis, it is crucial to assess Zn distribution either in the plant tissues or within the cells. In this study, we investigated the subcellular Zn distribution in Fe-deficient leaf cells of cucumber plants by using two different approaches: cellular fractionation coupled with inductively coupled plasma mass spectrometry (ICP/MS) and nanoscopic synchrotron X-ray fluorescence imaging. Fe-deficient leaves showed a strong accumulation of Zn as well as a strong alteration of the organelles' ultrastructure at the cellular level. The cellular fractionation-ICP/MS approach revealed that Zn accumulates in both chloroplasts and mitochondria of Fe deficient leaves. Nano-XRF imaging revealed Zn accumulation in chloroplast and mitochondrial compartments, with a higher concentration in chloroplasts. Such results show that (i) both approaches are suitable to investigate Zn distribution at the subcellular level and (ii) cellular Fe and Zn interactions take place mainly in the organelles, especially in the chloroplasts.
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Affiliation(s)
- Gianpiero Vigani
- Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy
- Department of Agricultural and Environmental Sciences, Production, Landscape, Agroenergy, University of Milano, Milan, Italy
- *Correspondence: Gianpiero Vigani, ; Roberto Terzano,
| | - Sylvain Bohic
- European Synchrotron Radiation Facility, NINA Beamline, Grenoble, France
| | - Franco Faoro
- Department of Agricultural and Environmental Sciences, Production, Landscape, Agroenergy, University of Milano, Milan, Italy
| | - Bart Vekemans
- Department of Analytical Chemistry, Ghent University, Ghent, Belgium
| | - Lazlo Vincze
- Department of Analytical Chemistry, Ghent University, Ghent, Belgium
| | - Roberto Terzano
- Department of Soil, Plant and Food Sciences, University of Bari, Bari, Italy
- *Correspondence: Gianpiero Vigani, ; Roberto Terzano,
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12
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Boamponsem GA, Leung DWM, Lister C. Insights into Resistance to Fe Deficiency Stress from a Comparative Study of In Vitro-Selected Novel Fe-Efficient and Fe-Inefficient Potato Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:1581. [PMID: 28955367 PMCID: PMC5601415 DOI: 10.3389/fpls.2017.01581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/29/2017] [Indexed: 05/29/2023]
Abstract
Iron (Fe) deficiency induces chlorosis (IDC) in plants and can result in reduced plant productivity. Therefore, development of Fe-efficient plants is of great interest. To gain a better understanding of the physiology of Fe-efficient plants, putative novel plant variants were regenerated from potato (Solanum tubersosum L. var. 'Iwa') callus cultures selected under Fe deficient or low Fe supply (0-5 μM Fe). Based on visual chlorosis rating (VCR), 23% of callus-derived regenerants were classified as Fe-efficient (EF) and 77% as Fe-inefficient (IFN) plant lines when they were grown under Fe deficiency conditions. Stem height was found to be highly correlated with internodal distance, leaf and root lengths in the EF plant lines grown under Fe deficiency conditions. In addition, compared to the IFN plant lines and control parental biotype, the EF plants including the lines named A1, B2, and B9, exhibited enhanced formation of lateral roots and root hairs as well as increased expression of ferritin (fer3) in the leaf and iron-regulated transporter (irt1) in the root. These morphological adaptations and changes in expression the fer3 and irt1 genes of the selected EF potato lines suggest that they are associated with resistance to low Fe supply stress.
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Affiliation(s)
| | - David W. M. Leung
- School of Biological Sciences, University of CanterburyChristchurch, New Zealand
| | - Carolyn Lister
- The New Zealand Institute for Plant and Food Research Limited, Canterbury Agriculture and Science CentreLincoln, New Zealand
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13
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dos Santos RS, de Araujo AT, Pegoraro C, de Oliveira AC. Dealing with iron metabolism in rice: from breeding for stress tolerance to biofortification. Genet Mol Biol 2017; 40:312-325. [PMID: 28304072 PMCID: PMC5452141 DOI: 10.1590/1678-4685-gmb-2016-0036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 09/22/2016] [Indexed: 12/23/2022] Open
Abstract
Iron is a well-known metal. Used by humankind since ancient times in many different ways, this element is present in all living organisms, where, unfortunately, it represents a two-way problem. Being an essential block in the composition of different proteins and metabolic pathways, iron is a vital component for animals and plants. That is why iron deficiency has a severe impact on the lives of different organisms, including humans, becoming a major concern, especially in developing countries where access to adequate nutrition is still difficult. On the other hand, this metal is also capable of causing damage when present in excess, becoming toxic to cells and affecting the whole organism. Because of its importance, iron absorption, transport and storage mechanisms have been extensively investigated in order to design alternatives that may solve this problem. As the understanding of the strategies that plants use to control iron homeostasis is an important step in the generation of improved plants that meet both human agricultural and nutritional needs, here we discuss some of the most important points about this topic.
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Affiliation(s)
- Railson Schreinert dos Santos
- Plant Genomics and Breeding Center (CGF), Universidade Federal de
Pelotas, Pelotas, RS, Brazil
- Technology Development Center (CDTec), Universidade Federal de
Pelotas, Pelotas, RS, Brazil
| | | | - Camila Pegoraro
- Plant Genomics and Breeding Center (CGF), Universidade Federal de
Pelotas, Pelotas, RS, Brazil
| | - Antonio Costa de Oliveira
- Plant Genomics and Breeding Center (CGF), Universidade Federal de
Pelotas, Pelotas, RS, Brazil
- Technology Development Center (CDTec), Universidade Federal de
Pelotas, Pelotas, RS, Brazil
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14
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Vigani G, Di Silvestre D, Agresta AM, Donnini S, Mauri P, Gehl C, Bittner F, Murgia I. Molybdenum and iron mutually impact their homeostasis in cucumber (Cucumis sativus) plants. THE NEW PHYTOLOGIST 2017; 213:1222-1241. [PMID: 27735062 DOI: 10.1111/nph.14214] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 08/22/2016] [Indexed: 05/22/2023]
Abstract
Molybdenum (Mo) and iron (Fe) are essential micronutrients required for crucial enzyme activities in plant metabolism. Here we investigated the existence of a mutual control of Mo and Fe homeostasis in cucumber (Cucumis sativus). Plants were grown under single or combined Mo and Fe starvation. Physiological parameters were measured, the ionomes of tissues and the ionomes and proteomes of root mitochondria were profiled, and the activities of molybdo-enzymes and the synthesis of molybdenum cofactor (Moco) were evaluated. Fe and Mo were found to affect each other's total uptake and distribution within tissues and at the mitochondrial level, with Fe nutritional status dominating over Mo homeostasis and affecting Mo availability for molybdo-enzymes in the form of Moco. Fe starvation triggered Moco biosynthesis and affected the molybdo-enzymes, with its main impact on nitrate reductase and xanthine dehydrogenase, both being involved in nitrogen assimilation and mobilization, and on the mitochondrial amidoxime reducing component. These results, together with the identification of > 100 proteins differentially expressed in root mitochondria, highlight the central role of mitochondria in the coordination of Fe and Mo homeostasis and allow us to propose the first model of the molecular interactions connecting Mo and Fe homeostasis.
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Affiliation(s)
- Gianpiero Vigani
- Department of Agricultural and Environmental Sciences, University of Milano, via Celoria 2, 20133, Milano, Italy
| | - Dario Di Silvestre
- Proteomic and Metabolomic Laboratory, Institute of Biomedical Technologies, National Research Council (ITB-CNR), via F.lli Cervi 93, 20090, Segrate (MI), Italy
| | - Anna Maria Agresta
- Proteomic and Metabolomic Laboratory, Institute of Biomedical Technologies, National Research Council (ITB-CNR), via F.lli Cervi 93, 20090, Segrate (MI), Italy
| | - Silvia Donnini
- Department of Agricultural and Environmental Sciences, University of Milano, via Celoria 2, 20133, Milano, Italy
| | - Pierluigi Mauri
- Proteomic and Metabolomic Laboratory, Institute of Biomedical Technologies, National Research Council (ITB-CNR), via F.lli Cervi 93, 20090, Segrate (MI), Italy
| | - Christian Gehl
- Institute of Horticulture Production Systems, Leibniz University of Hannover, Herrenhaeuser Str. 2, 30419, Hannover, Germany
| | - Florian Bittner
- Department of Plant Biology, Braunschweig University of Technology, Spielmannstrasse 7, 38106, Braunschweig, Germany
| | - Irene Murgia
- Department of Biosciences, University of Milano, via Celoria 26, 20133, Milano, Italy
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15
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Guaraldo M, Santambrogio P, Rovelli E, Di Savino A, Saglio G, Cittaro D, Roetto A, Levi S. Characterization of human mitochondrial ferritin promoter: identification of transcription factors and evidences of epigenetic control. Sci Rep 2016; 6:33432. [PMID: 27625068 PMCID: PMC5022048 DOI: 10.1038/srep33432] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 08/02/2016] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial ferritin (FtMt) is an iron storage protein belonging to the ferritin family but, unlike the cytosolic ferritin, it has an iron-unrelated restricted tissue expression. FtMt appears to be preferentially expressed in cell types characterized by high metabolic activity and oxygen consumption, suggesting a role in protecting mitochondria from iron-dependent oxidative damage. The human gene (FTMT) is intronless and its promoter region has not been described yet. To analyze the regulatory mechanisms controlling FTMT expression, we characterized the 5' flanking region upstream the transcriptional starting site of FTMT by in silico enquiry of sequences conservation, DNA deletion analysis, and ChIP assay. The data revealed a minimal promoter region and identified the presence of SP1, CREB and YY1 as positive regulators, and GATA2, FoxA1 and C/EBPβ as inhibitors of the transcriptional regulation. Furthermore, the FTMT transcription is increased by acetylating and de-methylating agent treatments in K562 and HeLa cells. These treatments up-regulate FtMt expression even in fibroblasts derived from a Friedreich ataxia patient, where it might exert a beneficial effect against mitochondrial oxidative damage. The expression of FTMT appears regulated by a complex mechanism involving epigenetic events and interplay between transcription factors.
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Affiliation(s)
- Michela Guaraldo
- San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milano, Italy
| | - Paolo Santambrogio
- San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milano, Italy
| | - Elisabetta Rovelli
- San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milano, Italy
| | - Augusta Di Savino
- University of Torino, Department of Clinical and Biological Sciences, AOU San Luigi Gonzaga, 10043 Orbassano, Torino, Italy
| | - Giuseppe Saglio
- University of Torino, Department of Clinical and Biological Sciences, AOU San Luigi Gonzaga, 10043 Orbassano, Torino, Italy
| | - Davide Cittaro
- San Raffaele Scientific Institute, Center for Translational Genomics and Bioinformatics, 20132 Milano, Italy
| | - Antonella Roetto
- University of Torino, Department of Clinical and Biological Sciences, AOU San Luigi Gonzaga, 10043 Orbassano, Torino, Italy
| | - Sonia Levi
- San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milano, Italy
- University Vita-Salute San Raffaele, 20132 Milano, Italy
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16
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Kovács K, Pechoušek J, Machala L, Zbořil R, Klencsár Z, Solti Á, Tóth B, Müller B, Pham HD, Kristóf Z, Fodor F. Revisiting the iron pools in cucumber roots: identification and localization. PLANTA 2016; 244:167-179. [PMID: 27002973 DOI: 10.1007/s00425-016-2502-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/04/2016] [Indexed: 06/05/2023]
Abstract
Fe deficiency responses in Strategy I causes a shift from the formation of partially removable hydrous ferric oxide on the root surface to the accumulation of Fe-citrate in the xylem. Iron may accumulate in various chemical forms during its uptake and assimilation in roots. The permanent and transient Fe microenvironments formed during these processes in cucumber which takes up Fe in a reduction based process (Strategy I) have been investigated. The identification of Fe microenvironments was carried out with (57)Fe Mössbauer spectroscopy and immunoblotting, whereas reductive washing and high-resolution microscopy was applied for the localization. In plants supplied with (57)Fe(III)-citrate, a transient presence of Fe-carboxylates in removable forms and the accumulation of partly removable, amorphous hydrous ferric oxide/hydroxyde have been identified in the apoplast and on the root surface, respectively. The latter may at least partly be the consequence of bacterial activity at the root surface. Ferritin accumulation did not occur at optimal Fe supply. Under Fe deficiency, highly soluble ferrous hexaaqua complex is transiently formed along with the accumulation of Fe-carboxylates, likely Fe-citrate. As (57)Fe-citrate is non-removable from the root samples of Fe deficient plants, the major site of accumulation is suggested to be the root xylem. Reductive washing results in another ferrous microenvironment remaining in the root apoplast, the Fe(II)-bipyridyl complex, which accounts for ~30 % of the total Fe content of the root samples treated for 10 min and rinsed with CaSO4 solution. When (57)Fe(III)-EDTA or (57)Fe(III)-EDDHA was applied as Fe-source higher soluble ferrous Fe accumulation was accompanied by a lower total Fe content, confirming that chelates are more efficient in maintaining soluble Fe in the medium while less stable natural complexes as Fe-citrate may perform better in Fe accumulation.
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Affiliation(s)
- Krisztina Kovács
- Institute of Chemistry, Eötvös Loránd University, P.O. Box 32, Budapest, 1512, Hungary.
| | - Jiří Pechoušek
- Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 771 46, Olomouc, Czech Republic
| | - Libor Machala
- Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 771 46, Olomouc, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Departments of Experimental Physics and Physical Chemistry, Faculty of Science, Palacký University in Olomouc, 771 46, Olomouc, Czech Republic
| | - Zoltán Klencsár
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - Ádám Solti
- Department of Plant Physiology and Molecular Plant Biology, Institute of Biology, Eötvös Loránd University, Pázmány Péter lane 1/c, Budapest, 1117, Hungary
| | - Brigitta Tóth
- Department of Botany, Crop Physiology and Biotechnology, Institute of Plant Sciences, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, 138 Böszörményi Str., Debrecen, 4032, Hungary
| | - Brigitta Müller
- Department of Plant Physiology and Molecular Plant Biology, Institute of Biology, Eötvös Loránd University, Pázmány Péter lane 1/c, Budapest, 1117, Hungary
| | - Hong Diep Pham
- Department of Plant Physiology and Molecular Plant Biology, Institute of Biology, Eötvös Loránd University, Pázmány Péter lane 1/c, Budapest, 1117, Hungary
| | - Zoltán Kristóf
- Department of Plant Anatomy, Institute of Biology, Eötvös Loránd University, Pázmány Péter lane 1/c, Budapest, 1117, Hungary
| | - Ferenc Fodor
- Department of Plant Physiology and Molecular Plant Biology, Institute of Biology, Eötvös Loránd University, Pázmány Péter lane 1/c, Budapest, 1117, Hungary
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17
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Chang HC, Wu R, Shang M, Sato T, Chen C, Shapiro JS, Liu T, Thakur A, Sawicki KT, Prasad SVN, Ardehali H. Reduction in mitochondrial iron alleviates cardiac damage during injury. EMBO Mol Med 2016; 8:247-67. [PMID: 26896449 PMCID: PMC4772952 DOI: 10.15252/emmm.201505748] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 01/18/2016] [Accepted: 01/20/2016] [Indexed: 01/19/2023] Open
Abstract
Excess cellular iron increases reactive oxygen species (ROS) production and causes cellular damage. Mitochondria are the major site of iron metabolism and ROS production; however, few studies have investigated the role of mitochondrial iron in the development of cardiac disorders, such as ischemic heart disease or cardiomyopathy (CM). We observe increased mitochondrial iron in mice after ischemia/reperfusion (I/R) and in human hearts with ischemic CM, and hypothesize that decreasing mitochondrial iron protects against I/R damage and the development of CM. Reducing mitochondrial iron genetically through cardiac-specific overexpression of a mitochondrial iron export protein or pharmacologically using a mitochondria-permeable iron chelator protects mice against I/R injury. Furthermore, decreasing mitochondrial iron protects the murine hearts in a model of spontaneous CM with mitochondrial iron accumulation. Reduced mitochondrial ROS that is independent of alterations in the electron transport chain's ROS producing capacity contributes to the protective effects. Overall, our findings suggest that mitochondrial iron contributes to cardiac ischemic damage, and may be a novel therapeutic target against ischemic heart disease.
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Affiliation(s)
- Hsiang-Chun Chang
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Rongxue Wu
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Meng Shang
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Tatsuya Sato
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Chunlei Chen
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Jason S Shapiro
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Ting Liu
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Anita Thakur
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Konrad T Sawicki
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Sathyamangla V N Prasad
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Hossein Ardehali
- Feinberg Cardiovascular Research Institute (FCVRI), Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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18
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Agafonov O, Selstø CH, Thorsen K, Xu XM, Drengstig T, Ruoff P. The Organization of Controller Motifs Leading to Robust Plant Iron Homeostasis. PLoS One 2016; 11:e0147120. [PMID: 26800438 PMCID: PMC4723245 DOI: 10.1371/journal.pone.0147120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 12/29/2015] [Indexed: 01/01/2023] Open
Abstract
Iron is an essential element needed by all organisms for growth and development. Because iron becomes toxic at higher concentrations iron is under homeostatic control. Plants face also the problem that iron in the soil is tightly bound to oxygen and difficult to access. Plants have therefore developed special mechanisms for iron uptake and regulation. During the last years key components of plant iron regulation have been identified. How these components integrate and maintain robust iron homeostasis is presently not well understood. Here we use a computational approach to identify mechanisms for robust iron homeostasis in non-graminaceous plants. In comparison with experimental results certain control arrangements can be eliminated, among them that iron homeostasis is solely based on an iron-dependent degradation of the transporter IRT1. Recent IRT1 overexpression experiments suggested that IRT1-degradation is iron-independent. This suggestion appears to be misleading. We show that iron signaling pathways under IRT1 overexpression conditions become saturated, leading to a breakdown in iron regulation and to the observed iron-independent degradation of IRT1. A model, which complies with experimental data places the regulation of cytosolic iron at the transcript level of the transcription factor FIT. Including the experimental observation that FIT induces inhibition of IRT1 turnover we found a significant improvement in the system’s response time, suggesting a functional role for the FIT-mediated inhibition of IRT1 degradation. By combining iron uptake with storage and remobilization mechanisms a model is obtained which in a concerted manner integrates iron uptake, storage and remobilization. In agreement with experiments the model does not store iron during its high-affinity uptake. As an iron biofortification approach we discuss the possibility how iron can be accumulated even during high-affinity uptake.
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Affiliation(s)
- Oleg Agafonov
- Centre for Organelle Research, University of Stavanger, Stavanger, Norway
| | | | - Kristian Thorsen
- Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway
| | - Xiang Ming Xu
- Centre for Organelle Research, University of Stavanger, Stavanger, Norway
| | - Tormod Drengstig
- Department of Electrical Engineering and Computer Science, University of Stavanger, Stavanger, Norway
| | - Peter Ruoff
- Centre for Organelle Research, University of Stavanger, Stavanger, Norway
- * E-mail:
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19
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Murgia I, Vigani G. Analysis of Arabidopsis thaliana atfer4-1, atfh and atfer4-1/atfh mutants uncovers frataxin and ferritin contributions to leaf ionome homeostasis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 94:65-72. [PMID: 26042547 DOI: 10.1016/j.plaphy.2015.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 05/22/2015] [Accepted: 05/22/2015] [Indexed: 05/09/2023]
Abstract
Ferritins are iron-storage proteins involved in the environmental and developmental control of the free iron pool within cells. Plant ferritins are targeted to mitochondria as well as to chloroplasts. AtFer4 is the Arabidopsis thaliana ferritin isoform that can be also targeted to mitochondria. Frataxin is a mitochondrial protein whose role is essential for plants; lack of AtFH frataxin causes early embryo-lethality in Arabidopsis. Because of that, the Arabidopsis atfh KO mutant is propagated in heterozygosis. For exploring the functional interaction between frataxin and ferritin, Arabidopsis double mutant atfer4-1/atfh was isolated and its physiological parameters were measured, as well as its ionome profile, together with those of both atfer4 and atfh single mutants, in different conditions of Fe supply. Impairment of both ferritin and frataxin did not lead to any effect on mitochondrial respiration. However, ionomics revealed that the content of macro- and microelements, occurring when the nutritional Fe supply changes, were altered in the mutants analysed. These results suggest that both ferritin and frataxin can contribute to the composition of the leaf ionome and also confirm ionomics as an excellent tool for detecting alterations in the plant's physiology.
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Affiliation(s)
| | - Gianpiero Vigani
- Dept. Agricultural and Environmental Sciences - Production, Landscape, Agroenergy, University of Milano, Italy
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20
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Vigani G, Zocchi G, Bashir K, Philippar K, Briat JF. Cellular iron homeostasis and metabolism in plant. FRONTIERS IN PLANT SCIENCE 2013; 4:490. [PMID: 24348493 PMCID: PMC3847546 DOI: 10.3389/fpls.2013.00490] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 11/14/2013] [Indexed: 05/07/2023]
Affiliation(s)
- Gianpiero Vigani
- Dipartimento di Scienze Agrarie e Ambientali-Produzione, Territorio e Agroenergia, Università degli Studi di MilanoMilano, Italy
- *Correspondence: ; ; ; ;
| | - Graziano Zocchi
- Dipartimento di Scienze Agrarie e Ambientali-Produzione, Territorio e Agroenergia, Università degli Studi di MilanoMilano, Italy
- *Correspondence: ; ; ; ;
| | - Khurram Bashir
- Center for Sustainable Resource Sciences, RIKEN Yokohama campus, RIKENYokohama, Japan
- *Correspondence: ; ; ; ;
| | - Katrin Philippar
- Department Biology I-Plant Biochemistry and Physiology, Ludwig-Maximilians-University MunichMunich, Germany
- *Correspondence: ; ; ; ;
| | - Jean François Briat
- Biochimie and Physiologie Moléculaire des Plantes, Centre National de la Recherche Scientifique, Institut National de la Recherche Agronomique, Université Montpellier 2Montpellier, France
- *Correspondence: ; ; ; ;
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