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Woldetsadik D, Sims DB, Herrera Huerta E, Nelson T, Garner MC, Monk J, Hudson AC, Schlick K. Elemental profile of wheat in the las vegas market: Geographic origin discrimination and probabilistic health risk assessment. Food Chem Toxicol 2024; 191:114862. [PMID: 38986833 DOI: 10.1016/j.fct.2024.114862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/27/2024] [Accepted: 07/07/2024] [Indexed: 07/12/2024]
Abstract
This study investigates concentrations of toxic and potentially toxic elements (PTEs) in organic and conventional wheat flour and grains marketed in Las Vegas. Geographic origins of the samples were evaluated using Linear Discriminant Analysis (LDA). Monte Carlo Simulation technique was also employed to evaluate non-carcinogenic risk in four life stages. Concentrations of Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se, Sr, and Zn were determined using inductively coupled plasma mass spectrometry (ICP-MS) following hot block-assisted digestion. Obtained results showed non-significant differences in contents of toxic and PTEs between conventional and organic wheat grains/flour. Using LDA, metal (loid)s were found to be indicative of geographical origin. The LDA produced a total correct classification rate of 95.8% and 100% for US and West Pacific Region samples, respectively. The results of the present study indicate that the estimated non-carcinogenic risk associated with toxic element intakes across the four life stages were far lower than the threshold value (Target Hazard Quotient (THQ) > 1). However, the probability of exceeding the threshold value for Mn is approximately 32% in children aged between 5 and 8 years. The findings of this study can aid in understanding dietary Mn exposure in children in Las Vegas.
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Affiliation(s)
| | | | | | | | | | - Joshua Monk
- College of Southern Nevada, Las Vegas, NV, USA.
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Panda SK, Gupta D, Patel M, Vyver CVD, Koyama H. Functionality of Reactive Oxygen Species (ROS) in Plants: Toxicity and Control in Poaceae Crops Exposed to Abiotic Stress. PLANTS (BASEL, SWITZERLAND) 2024; 13:2071. [PMID: 39124190 PMCID: PMC11313751 DOI: 10.3390/plants13152071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/12/2024]
Abstract
Agriculture and changing environmental conditions are closely related, as weather changes could adversely affect living organisms or regions of crop cultivation. Changing environmental conditions trigger different abiotic stresses, which ultimately cause the accumulation of reactive oxygen species (ROS) in plants. Common ROS production sites are the chloroplast, endoplasmic reticulum, plasma membrane, mitochondria, peroxisomes, etc. The imbalance in ROS production and ROS detoxification in plant cells leads to oxidative damage to biomolecules such as lipids, nucleic acids, and proteins. At low concentrations, ROS initiates signaling events related to development and adaptations to abiotic stress in plants by inducing signal transduction pathways. In plants, a stress signal is perceived by various receptors that induce a signal transduction pathway that activates numerous signaling networks, which disrupt gene expression, impair the diversity of kinase/phosphatase signaling cascades that manage the stress response in the plant, and result in changes in physiological responses under various stresses. ROS production also regulates ABA-dependent and ABA-independent pathways to mitigate drought stress. This review focuses on the common subcellular location of manufacturing, complex signaling mechanisms, and networks of ROS, with an emphasis on cellular effects and enzymatic and non-enzymatic antioxidant scavenging mechanisms of ROS in Poaceae crops against drought stress and how the manipulation of ROS regulates stress tolerance in plants. Understanding ROS systems in plants could help to create innovative strategies to evolve paths of cell protection against the negative effects of excessive ROS in attempts to improve crop productivity in adverse environments.
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Affiliation(s)
- Sanjib Kumar Panda
- Department of Biochemistry, Central University of Rajasthan, Ajmer 305817, India; (S.K.P.); (D.G.); (M.P.)
| | - Divya Gupta
- Department of Biochemistry, Central University of Rajasthan, Ajmer 305817, India; (S.K.P.); (D.G.); (M.P.)
| | - Mayur Patel
- Department of Biochemistry, Central University of Rajasthan, Ajmer 305817, India; (S.K.P.); (D.G.); (M.P.)
| | - Christell Van Der Vyver
- Institute of Plant Biotechnology, Stellenbosch University, Private Bag X1, Stellenbosch 7601, South Africa;
| | - Hiroyuki Koyama
- Faculty of Applied Biology, Gifu University, Gifu 501-1193, Japan
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3
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Kumar J, Saini DK, Kumar A, Kumari S, Gahlaut V, Rahim MS, Pandey AK, Garg M, Roy J. Biofortification of Triticum species: a stepping stone to combat malnutrition. BMC PLANT BIOLOGY 2024; 24:668. [PMID: 39004715 PMCID: PMC11247745 DOI: 10.1186/s12870-024-05161-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: 03/02/2023] [Accepted: 05/16/2024] [Indexed: 07/16/2024]
Abstract
BACKGROUND Biofortification represents a promising and sustainable strategy for mitigating global nutrient deficiencies. However, its successful implementation poses significant challenges. Among staple crops, wheat emerges as a prime candidate to address these nutritional gaps. Wheat biofortification offers a robust approach to enhance wheat cultivars by elevating the micronutrient levels in grains, addressing one of the most crucial global concerns in the present era. MAIN TEXT Biofortification is a promising, but complex avenue, with numerous limitations and challenges to face. Notably, micronutrients such as iron (Fe), zinc (Zn), selenium (Se), and copper (Cu) can significantly impact human health. Improving Fe, Zn, Se, and Cu contents in wheat could be therefore relevant to combat malnutrition. In this review, particular emphasis has been placed on understanding the extent of genetic variability of micronutrients in diverse Triticum species, along with their associated mechanisms of uptake, translocation, accumulation and different classical to advanced approaches for wheat biofortification. CONCLUSIONS By delving into micronutrient variability in Triticum species and their associated mechanisms, this review underscores the potential for targeted wheat biofortification. By integrating various approaches, from conventional breeding to modern biotechnological interventions, the path is paved towards enhancing the nutritional value of this vital crop, promising a brighter and healthier future for global food security and human well-being.
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Affiliation(s)
- Jitendra Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali-140306, Mohali, Punjab, India.
| | - Dinesh Kumar Saini
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, 141004, India
| | - Ashish Kumar
- National Agri-Food Biotechnology Institute (NABI), Mohali-140306, Mohali, Punjab, India
| | - Supriya Kumari
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India
| | - Vijay Gahlaut
- Department of Biotechnology, University Center for Research and Development Chandigarh University, Gharuan, Mohali, Punjab, 140413, India
| | - Mohammed Saba Rahim
- CSIR - Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176061, India
| | - Ajay Kumar Pandey
- National Agri-Food Biotechnology Institute (NABI), Mohali-140306, Mohali, Punjab, India
| | - Monika Garg
- National Agri-Food Biotechnology Institute (NABI), Mohali-140306, Mohali, Punjab, India
| | - Joy Roy
- National Agri-Food Biotechnology Institute (NABI), Mohali-140306, Mohali, Punjab, India.
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Imran M, Shafiq S, Widemann E. SPOTLIGHT: NAC transcription factor elevates iron content in maize: A promising solution to combat iron deficiency. JOURNAL OF PLANT PHYSIOLOGY 2024; 294:154194. [PMID: 38364452 DOI: 10.1016/j.jplph.2024.154194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/11/2024] [Accepted: 02/11/2024] [Indexed: 02/18/2024]
Affiliation(s)
- Muhammad Imran
- Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China; Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| | - Sarfraz Shafiq
- Department of Crop Science and Technology, College of Agriculture, South China Agricultural University, Guangzhou, China; Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Emilie Widemann
- Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China; Institut de Biologie Moléculaire des Plantes, CNRS-Université de Strasbourg, 67084, Strasbourg, France.
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5
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Zulfiqar U, Khokhar A, Maqsood MF, Shahbaz M, Naz N, Sara M, Maqsood S, Sahar S, Hussain S, Ahmad M. Genetic biofortification: advancing crop nutrition to tackle hidden hunger. Funct Integr Genomics 2024; 24:34. [PMID: 38365972 DOI: 10.1007/s10142-024-01308-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/18/2024]
Abstract
Malnutrition, often termed "hidden hunger," represents a pervasive global issue carrying significant implications for health, development, and socioeconomic conditions. Addressing the challenge of inadequate essential nutrients, despite sufficient caloric intake, is crucial. Biofortification emerges as a promising solution by enhance the presence of vital nutrients like iron, zinc, iodine, and vitamin A in edible parts of different crop plants. Crop biofortification can be attained through either agronomic methods or genetic breeding techniques. Agronomic strategies for biofortification encompass the application of mineral fertilizers through foliar or soil methods, as well as leveraging microbe-mediated mechanisms to enhance nutrient uptake. On the other hand, genetic biofortification involves the strategic crossing of plants to achieve a desired combination of genes, promoting balanced nutrient uptake and bioavailability. Additionally, genetic biofortification encompasses innovative methods such as speed breeding, transgenic approaches, genome editing techniques, and integrated omics approaches. These diverse strategies collectively contribute to enhancing the nutritional profile of crops. This review highlights the above-said genetic biofortification strategies and it also covers the aspect of reduction in antinutritional components in food through genetic biofortification.
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Affiliation(s)
- Usman Zulfiqar
- Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
| | - Amman Khokhar
- Department of Botany, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - Muhammad Shahbaz
- Department of Botany, University of Agriculture, Faisalabad, Pakistan
| | - Nargis Naz
- Department of Botany, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Maheen Sara
- Department of Nutritional Sciences, Government College Women University, Faisalabad, Pakistan
| | - Sana Maqsood
- Department of Botany, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Sajila Sahar
- Department of Plant Breeding & Genetics, University of Agriculture, Faisalabad, Pakistan
| | - Saddam Hussain
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Ahmad
- Department of Agronomy, University of Agriculture, Faisalabad, Pakistan
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6
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Yan P, Du Q, Chen H, Guo Z, Wang Z, Tang J, Li WX. Biofortification of iron content by regulating a NAC transcription factor in maize. Science 2023; 382:1159-1165. [PMID: 38060668 DOI: 10.1126/science.adf3256] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 11/06/2023] [Indexed: 12/18/2023]
Abstract
Iron (Fe) deficiency remains widespread among people in developing countries. To help solve this problem, breeders have been attempting to develop maize cultivars with high yields and high Fe concentrations in the kernels. We conducted a genome-wide association study and identified a gene, ZmNAC78 (NAM/ATAF/CUC DOMAIN TRANSCRIPTION FACTOR 78), that regulates Fe concentrations in maize kernels. We cultivated maize varieties with both high yield and high Fe concentrations in their kernels by using a molecular marker developed from a 42-base pair insertion or deletion (indel) in the promoter of ZmNAC78. ZmNAC78 expression is enriched in the basal endosperm transfer layer of kernels, and the ZmNAC78 protein directly regulates messenger RNA abundance of Fe transporters. Our results thus provide an approach to develop maize varieties with Fe-enriched kernels.
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Affiliation(s)
- Pengshuai Yan
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
| | - Qingguo Du
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Huan Chen
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zifeng Guo
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Zhonghua Wang
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jihua Tang
- National Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China
- Shennong Laboratory, Zhengzhou 450002, China
| | - Wen-Xue Li
- State Key Laboratory of Crop Gene Resources and Breeding, National Engineering Laboratory for Crop Molecular Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
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Verbeecke V, Custódio L, Strobbe S, Van Der Straeten D. The role of orphan crops in the transition to nutritional quality-oriented crop improvement. Biotechnol Adv 2023; 68:108242. [PMID: 37640278 DOI: 10.1016/j.biotechadv.2023.108242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 08/09/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
Micronutrient malnutrition is a persisting problem threatening global human health. Biofortification via metabolic engineering has been proposed as a cost-effective and short-term means to alleviate this burden. There has been a recent rise in the recognition of potential that underutilized, orphan crops can hold in decreasing malnutrition concerns. Here, we illustrate how orphan crops can serve as a medium to provide micronutrients to populations in need, whilst promoting and maintaining dietary diversity. We provide a roadmap, illustrating which aspects to be taken into consideration when evaluating orphan crops. Recent developments have shown successful biofortification via metabolic engineering in staple crops. This review provides guidance in the implementation of these successes to relevant orphan crop species, with a specific focus on the relevant micronutrients iron, zinc, provitamin A and folates.
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Affiliation(s)
- Vincent Verbeecke
- Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - Laura Custódio
- Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - Simon Strobbe
- Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium
| | - Dominique Van Der Straeten
- Laboratory of Functional Plant Biology, Department of Biology, Ghent University, K.L. Ledeganckstraat 35, 9000 Ghent, Belgium.
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8
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Avnee, Sood S, Chaudhary DR, Jhorar P, Rana RS. Biofortification: an approach to eradicate micronutrient deficiency. Front Nutr 2023; 10:1233070. [PMID: 37789898 PMCID: PMC10543656 DOI: 10.3389/fnut.2023.1233070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 08/21/2023] [Indexed: 10/05/2023] Open
Abstract
Micronutrient deficiency also known as "hidden hunger" refers to a condition that occurs when the body lacks essential vitamins and minerals that are required in small amounts for proper growth, development and overall health. These deficiencies are particularly common in developing countries, where a lack of access to a varied and nutritious diet makes it difficult for people to get the micronutrients they need. Micronutrient supplementation has been a topic of interest, especially during the Covid-19 pandemic, due to its potential role in supporting immune function and overall health. Iron (Fe), zinc (Zn), iodine (I), and selenium (Se) deficiency in humans are significant food-related issues worldwide. Biofortification is a sustainable strategy that has been developed to address micronutrient deficiencies by increasing the levels of essential vitamins and minerals in staple crops that are widely consumed by people in affected communities. There are a number of agricultural techniques for biofortification, including selective breeding of crops to have higher levels of specific nutrients, agronomic approach using fertilizers and other inputs to increase nutrient uptake by crops and transgenic approach. The agronomic approach offers a temporary but speedy solution while the genetic approach (breeding and transgenic) is the long-term solution but requires time to develop a nutrient-rich variety.
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Affiliation(s)
- Avnee
- Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
| | - Sonia Sood
- Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
| | - Desh Raj Chaudhary
- Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
| | - Pooja Jhorar
- Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
| | - Ranbir Singh Rana
- Department of Agronomy, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur, India
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9
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Zhang H, Song J, Dong F, Li Y, Ge S, Wei B, Liu Y. Multiple roles of wheat ferritin genes during stress treatment and TaFER5D-1 as a positive regulator in response to drought and salt tolerance. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 202:107921. [PMID: 37544121 DOI: 10.1016/j.plaphy.2023.107921] [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: 03/20/2023] [Revised: 05/25/2023] [Accepted: 07/28/2023] [Indexed: 08/08/2023]
Abstract
Ferritin not only regulates the plant's iron content but also plays a significant role in the plant's development and resistance to oxidative damage. However, the role of the FER family in wheat has not been systematically elucidated. In this study, 39 FERs identified from wheat and its ancestral species were clustered into two subgroups, and gene members from the same group contain relatively conservative protein models. The structural analyses indicated that the gene members from the same group contained relatively conserved protein models. The cis-acting elements and expression patterns analysis suggested that TaFERs might play an important role combating to abiotic and biotic stresses. In the transcriptional analysis, the TaFER5D-1 gene was found to be significantly up-regulated under drought and salt stresses and was, therefore, selected to further explore the biological functions Moreover, the GFP expression assay revealed the subcellular localization of TaFER5D-1 proteins in the chloroplast, nucleus, membrane and cytoplasm. Over-expression of TaFER5D-1 in transgenic Arabidopsis lines conferred greater tolerance to drought and salt stress. According to the qRT-PCR data, TaFER5D-1 gene over-expression increased the expression of genes related to root development (Atsweet-17 and AtRSL4), iron storage (AtVIT1 and AtYSL1), and stress response (AtGolS1 and AtCOR47). So it is speculated that TaFER5D-1 could improve stress tolerance by promoting root growth, iron storage, and stress-response ability. Thus, the current study provides insight into the role of TaFER genes in wheat.
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Affiliation(s)
- Huadong Zhang
- Institute of Food Crops, Hubei Academy of Agricultural Sciences/Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan, 430064, China
| | - Jinghan Song
- National Key Laboratory of Rice Biology/Institute of Crop Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Feiyan Dong
- Institute of Food Crops, Hubei Academy of Agricultural Sciences/Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan, 430064, China
| | - Yaqian Li
- Institute of Food Crops, Hubei Academy of Agricultural Sciences/Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan, 430064, China
| | - Shijie Ge
- Institute of Food Crops, Hubei Academy of Agricultural Sciences/Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan, 430064, China
| | - Bo Wei
- Peking University Institute of Advanced Agricultural Sciences/National Key Laboratory of Wheat Improvement, Weifang, Shandong, 261325, China.
| | - Yike Liu
- Institute of Food Crops, Hubei Academy of Agricultural Sciences/Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs/Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Wuhan, 430064, China.
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10
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Sultan AAYA, Gebreel HM, Youssef HIA. Biofertilizer effect of some zinc dissolving bacteria free and encapsulated on Zea mays growth. Arch Microbiol 2023; 205:202. [PMID: 37084028 PMCID: PMC10121707 DOI: 10.1007/s00203-023-03537-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 04/22/2023]
Abstract
Crop nutrition depends on zinc for enzymatic, oxidative, and metabolic processes. In the current study 20 different bacteria were isolated from five soil samples collected from different fields in Egypt. Bacterial isolates were screened for their ability to solubilize insoluble zinc oxide and zinc carbonate. The ability of selected isolates to tolerate soluble zinc was determined using different concentrations of (ZnSO4). Three bacterial isolates were selected with efficiency in solubilizing zinc oxide and zinc carbonate while tolerating high levels of soluble zinc. Molecular identification by 16S rRNA sequencing of the chosen isolates identified them as B3 (Acinetobacter calcoaceticus), B5 (Bacillus proteolyticus) and C6 (Stenotrophomonas pavanii). Sodium alginate beads formulated with the isolated bacteria were tested for stability under different storage conditions for 3 months. A pot experiment was conducted to study and compare the effect of using chosen isolates as an in vivo Zn solubilizer with amended ZnCO3 either alone or embedded in beads as carrier in the soil and its effect on growth parameters of Zea mays after 2 months. There was an increase in Zn uptake in all treatments compared to the control. However, plants grown in a pot treated with ZnCO3 and Acinetobacter calcoaceticus showed the highest zinc content and plant dry weight as compared to the control. Finally, selected isolates in both free and encapsulated forms showed improved plant growth parameters and higher zinc content and can be applied as biofertilizers to enhance soil fertility.
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Affiliation(s)
| | - Hassan Mahmoud Gebreel
- Department of Microbiology, Faculty of Science, Ain Shams University, El-Khalyfa El-Mamoun Street Abbasya, Cairo, Egypt
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11
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Harrington SA, Connorton JM, Nyangoma NIM, McNelly R, Morgan YML, Aslam MF, Sharp PA, Johnson AAT, Uauy C, Balk J. A two-gene strategy increases iron and zinc concentrations in wheat flour, improving mineral bioaccessibility. PLANT PHYSIOLOGY 2023; 191:528-541. [PMID: 36308454 PMCID: PMC9806615 DOI: 10.1093/plphys/kiac499] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/13/2022] [Indexed: 05/09/2023]
Abstract
Dietary deficiencies of iron and zinc cause human malnutrition that can be mitigated by biofortified staple crops. Conventional breeding approaches to increase grain mineral concentrations in wheat (Triticum aestivum L.) have had only limited success, and our understanding of the genetic and physiological barriers to altering this trait is incomplete. Here we demonstrate that a transgenic approach combining endosperm-specific expression of the wheat VACUOLAR IRON TRANSPORTER gene TaVIT2-D with constitutive expression of the rice (Oryza sativa) NICOTIANAMINE SYNTHASE gene OsNAS2 significantly increases the total concentration of zinc and relocates iron to white-flour fractions. In two distinct bread wheat cultivars, we show that the so called VIT-NAS construct led to a two-fold increase in zinc in wholemeal flour, to ∼50 µg g-1. Total iron was not significantly increased, but redistribution within the grain resulted in a three-fold increase in iron in highly pure, roller-milled white flour, to ∼25 µg g-1. Interestingly, expression of OsNAS2 partially restored iron translocation to the aleurone, which is iron depleted in grain overexpressing TaVIT2 alone. A greater than three-fold increase in the level of the natural plant metal chelator nicotianamine in the grain of VIT-NAS lines corresponded with improved iron and zinc bioaccessibility in white flour. The growth of VIT-NAS plants in the greenhouse was indistinguishable from untransformed controls. Our results provide insights into mineral translocation and distribution in wheat grain and demonstrate that the individual and combined effects of the two transgenes can enhance the nutritional quality of wheat beyond what is possible by conventional breeding.
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Affiliation(s)
| | - James M Connorton
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | | | - Rose McNelly
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | - Yvie M L Morgan
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | - Mohamad F Aslam
- Department of Nutritional Sciences, King’s College London, London SE1 9NH, UK
| | - Paul A Sharp
- Department of Nutritional Sciences, King’s College London, London SE1 9NH, UK
| | | | - Cristobal Uauy
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
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12
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Nguyen M, Knowling M, Tran NN, Burgess A, Fisk I, Watt M, Escribà-Gelonch M, This H, Culton J, Hessel V. Space farming: Horticulture systems on spacecraft and outlook to planetary space exploration. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 194:708-721. [PMID: 36566710 DOI: 10.1016/j.plaphy.2022.12.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 11/24/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
Successful human space exploration requires more products than can be taken as payload. There is a need, therefore, for in-space circular manufacturing. Requirements for this include limited resource inflow, from either Earth or other planets and the generation of minimal waste. The provision of nutritious food is a clear need for human survival on the Moon or Mars and is one of the most complex to solve. Demand in large quantities, constant and reliable provision of food requires the development of specialist agricultural technologies. Here, we first review the history of space farming over the past five decades. This survey assesses the technologies which have been tested under the harsh conditions of space, identifying which modern horticultural components are applicable for in-space plant growth. We then outline which plants have been grown and under what conditions, and speculate upon the types of plants that could be selected to best nourish astronauts. Current systems are focussed on experimentation and exploration, but do not yet provide turn-key solutions for efficient food production within a long-term space exploration scenario. With that take, this review aims to provide a perspective on how an engineered closed circular environmental life-support system (ECCLES) might be constructed. To exemplify the latter, nutrient auto accumulation by biofortification is proposed through the integration of space farming and space mining, which is uncharted on Earth.
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Affiliation(s)
- Melinda Nguyen
- School of Chemical Engineering and Advanced Materials, University of Adelaide, Adelaide, Australia; Andy Thomas Centre of Space Resources, University of Adelaide, Adelaide, Australia; School of Agriculture, Food and Wine, University of Adelaide, Adelaide, Australia
| | - Matthew Knowling
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, Australia
| | - Nam N Tran
- School of Chemical Engineering and Advanced Materials, University of Adelaide, Adelaide, Australia; Department of Chemical Engineering, Can Tho University, Can Tho, Viet Nam
| | - Alexandra Burgess
- School of Biosciences, Sutton Bonington Campus, University of Nottingham, Sutton Bonington, United Kingdom
| | - Ian Fisk
- School of Biosciences, Sutton Bonington Campus, University of Nottingham, Sutton Bonington, United Kingdom
| | - Michelle Watt
- Faculty of Sciences, University of Melbourne, Melbourne, Australia
| | | | - Herve This
- INRA Team of Molecular Gastronomy, INRA/ AgroParisTech, Paris, France
| | - John Culton
- Andy Thomas Centre of Space Resources, University of Adelaide, Adelaide, Australia; School of Agriculture, Food and Wine, University of Adelaide, Adelaide, Australia
| | - Volker Hessel
- School of Chemical Engineering and Advanced Materials, University of Adelaide, Adelaide, Australia; Andy Thomas Centre of Space Resources, University of Adelaide, Adelaide, Australia.
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13
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Ofori KF, Antoniello S, English MM, Aryee ANA. Improving nutrition through biofortification-A systematic review. Front Nutr 2022; 9:1043655. [PMID: 36570169 PMCID: PMC9784929 DOI: 10.3389/fnut.2022.1043655] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 09/30/2022] [Indexed: 12/14/2022] Open
Abstract
Nutritious foods are essential for human health and development. However, malnutrition and hidden hunger continue to be a challenge globally. In most developing countries, access to adequate and nutritious food continues to be a challenge. Although hidden hunger is less prevalent in developed countries compared to developing countries where iron (Fe) and zinc (Zn) deficiencies are common. The United Nations (UN) 2nd Sustainable Development Goal was set to eradicate malnutrition and hidden hunger. Hidden hunger has led to numerous cases of infant and maternal mortalities, and has greatly impacted growth, development, cognitive ability, and physical working capacity. This has influenced several countries to develop interventions that could help combat malnutrition and hidden hunger. Interventions such as dietary diversification and food supplementation are being adopted. However, fortification but mainly biofortification has been projected to be the most sustainable solution to malnutrition and hidden hunger. Plant-based foods (PBFs) form a greater proportion of diets in certain populations; hence, fortification of PBFs is relevant in combating malnutrition and hidden hunger. Agronomic biofortification, plant breeding, and transgenic approaches are some currently used strategies in food crops. Crops such as cereals, legumes, oilseeds, vegetables, and fruits have been biofortified through all these three strategies. The transgenic approach is sustainable, efficient, and rapid, making it suitable for biofortification programs. Omics technology has also been introduced to improve the efficiency of the transgenic approach.
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Affiliation(s)
- Kelvin F. Ofori
- Department of Human Ecology, Delaware State University, Dover, DE, United States
| | - Sophia Antoniello
- Department Human Nutrition, Saint Francis Xavier University, Antigonish, NS, Canada
| | - Marcia M. English
- Department Human Nutrition, Saint Francis Xavier University, Antigonish, NS, Canada
| | - Alberta N. A. Aryee
- Department of Human Ecology, Delaware State University, Dover, DE, United States,*Correspondence: Alberta N. A. Aryee,
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Roy C, Kumar S, Ranjan RD, Kumhar SR, Govindan V. Genomic approaches for improving grain zinc and iron content in wheat. Front Genet 2022; 13:1045955. [PMID: 36437911 PMCID: PMC9683485 DOI: 10.3389/fgene.2022.1045955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 10/24/2022] [Indexed: 09/29/2023] Open
Abstract
More than three billion people worldwide suffer from iron deficiency associated anemia and an equal number people suffer from zinc deficiency. These conditions are more prevalent in Sub-Saharan Africa and South Asia. In developing countries, children under the age of five with stunted growth and pregnant or lactating women were found to be at high risk of zinc and iron deficiencies. Biofortification, defined as breeding to develop varieties of staple food crops whose grain contains higher levels of micronutrients such as iron and zinc, are one of the most promising, cost-effective and sustainable ways to improve the health in resource-poor households, particularly in rural areas where families consume some part of what they grow. Biofortification through conventional breeding in wheat, particularly for grain zinc and iron, have made significant contributions, transferring important genes and quantitative trait loci (QTLs) from wild and related species into cultivated wheat. Nonetheless, the quantitative, genetically complex nature of iron and zinc levels in wheat grain limits progress through conventional breeding, making it difficult to attain genetic gain both for yield and grain mineral concentrations. Wheat biofortification can be achieved by enhancing mineral uptake, source-to-sink translocation of minerals and their deposition into grains, and the bioavailability of the minerals. A number of QTLs with major and minor effects for those traits have been detected in wheat; introducing the most effective into breeding lines will increase grain zinc and iron concentrations. New approaches to achieve this include marker assisted selection and genomic selection. Faster breeding approaches need to be combined to simultaneously increase grain mineral content and yield in wheat breeding lines.
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Affiliation(s)
- Chandan Roy
- Department of Genetics and Plant Breeding, Agriculture University, Jodhpur, Rajasthan, India
| | - Sudhir Kumar
- Department of Plant Breeding and Genetics, Bihar Agricultural University, Bhagalpur, Bihar, India
| | - Rakesh Deo Ranjan
- Department of Plant Breeding and Genetics, Bihar Agricultural University, Bhagalpur, Bihar, India
| | - Sita Ram Kumhar
- Department of Genetics and Plant Breeding, Agriculture University, Jodhpur, Rajasthan, India
| | - Velu Govindan
- International Maize and Wheat Improvement Center (CIMMYT), Mexico City, Mexico
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15
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Gupta OP, Singh AK, Singh A, Singh GP, Bansal KC, Datta SK. Wheat Biofortification: Utilizing Natural Genetic Diversity, Genome-Wide Association Mapping, Genomic Selection, and Genome Editing Technologies. Front Nutr 2022; 9:826131. [PMID: 35938135 PMCID: PMC9348810 DOI: 10.3389/fnut.2022.826131] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 06/06/2022] [Indexed: 01/11/2023] Open
Abstract
Alleviating micronutrients associated problems in children below five years and women of childbearing age, remains a significant challenge, especially in resource-poor nations. One of the most important staple food crops, wheat attracts the highest global research priority for micronutrient (Fe, Zn, Se, and Ca) biofortification. Wild relatives and cultivated species of wheat possess significant natural genetic variability for these micronutrients, which has successfully been utilized for breeding micronutrient dense wheat varieties. This has enabled the release of 40 biofortified wheat cultivars for commercial cultivation in different countries, including India, Bangladesh, Pakistan, Bolivia, Mexico and Nepal. In this review, we have systematically analyzed the current understanding of availability and utilization of natural genetic variations for grain micronutrients among cultivated and wild relatives, QTLs/genes and different genomic regions regulating the accumulation of micronutrients, and the status of micronutrient biofortified wheat varieties released for commercial cultivation across the globe. In addition, we have also discussed the potential implications of emerging technologies such as genome editing to improve the micronutrient content and their bioavailability in wheat.
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Affiliation(s)
- Om Prakash Gupta
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Amit Kumar Singh
- ICAR-National Bureau of Plant Genetic Resources, New Delhi, India
| | - Archana Singh
- Department of Botany, Hansraj College, University of Delhi, New Delhi, India
| | | | | | - Swapan K. Datta
- Department of Botany, University of Calcutta, Kolkata, India
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Kenzhebayeva S, Atabayeva S, Sarsu F, Abekova A, Shoinbekova S, Omirbekova N, Doktyrbay G, Beisenova A, Shavrukov Y. Organ-specific expression of genes involved in iron homeostasis in wheat mutant lines with increased grain iron and zinc content. PeerJ 2022; 10:e13515. [PMID: 35707120 PMCID: PMC9190668 DOI: 10.7717/peerj.13515] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 05/09/2022] [Indexed: 01/17/2023] Open
Abstract
Background Iron deficiency is a well-known nutritional disorder, and the imbalance of trace-elements, specifically iron, is the most common nutrient deficiency of foods across the world, including in Kazakhstan. Wheat has significant nutritional relevance, especially in the provision of iron, however many bread wheat varieties have low iron despite the need for human nourishment. In this study, the expression profiles of wheat homologous genes related to iron homeostasis were investigated. The work resulted in the development of two new M5 mutant lines of spring bread wheat through gamma-irradiation (200 Gy) with higher grain iron and zinc content, lower phytic acid content, and enhanced iron bioavailability compared to the parent variety. Mutant lines were also characterized by higher means of yield associated traits such as grain number per main spike, grain weight per main spike, grain weight per plant, and thousand-grain weight. Methods The homologous genes of bread wheat from several groups were selected for gene expression studies exploring the tight control of iron uptake, translocation rate and accumulation in leaves and roots, and comprised the following: (1) S-adenosylmethionine synthase (SAMS), nicotianamine synthase (NAS1), nicotianamine aminotransferase (NAAT), deoxymugineic acid synthetase (DMAS), involved in the synthesis and release of phytosiderophores; (2) transcription factor basic helix-loop-helix (bHLH); (3) transporters of mugineic acid (TOM), involved in long-distance iron transport; (4) yellow stripe-like (YSlA), and the vacuolar transporter (VIT2), involved in intracellular iron transport and storage; and lastly (5) natural resistance-associated macrophage protein (NRAMP) and ferritin (Fer1A). Results The wheat homologous genes TaSAMS, TaNAS1, and TaDMAS, were significantly up-regulated in the roots of both mutant lines by 2.1-4.7-fold compared to the parent variety. The combined over-expression of TaYSlA and TaVIT2 was also revealed in the roots of mutant lines by 1.3-2.7-fold. In one of the mutant lines, genes encoding intracellular iron transport and storage genes TaNRAMP and TaFer1A-D showed significant up-regulation in roots and leaves (by 1.4- and 3.5-fold, respectively). The highest expression was recorded in the transcription factor TabHLH, which was expressed 13.1- and 30.2-fold in the roots of mutant lines. Our research revealed that genotype-dependent and organ-specific gene expression profiles can provide new insights into iron uptake, translocation rate, storage, and regulation in wheat which aid the prioritization of gene targets for iron biofortification and bioavailability.
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Affiliation(s)
- Saule Kenzhebayeva
- Department of Biotechnology/Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Saule Atabayeva
- Department of Biotechnology/Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Fatma Sarsu
- Plant Breeding and Genetics Section, General Directorate of Agricultural Research and Policies, Ankara, Turkey
| | - Alfiya Abekova
- Kazakh Research Institute of Agriculture and Plant Growing, Almaty Region, Kazakhstan
| | - Sabina Shoinbekova
- Department of Biotechnology/Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Nargul Omirbekova
- Department of Biotechnology/Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Gulina Doktyrbay
- Department of Biotechnology/Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| | - Aizhan Beisenova
- Department of Molecular Biology, Asfendiyarov Kazakh National Medical University, Almaty, Kazakhstan
| | - Yuri Shavrukov
- College of Science and Engineering (Biological Sciences), Flinders University of South Australia, Adelaide, Australia
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17
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Wani SH, Gaikwad K, Razzaq A, Samantara K, Kumar M, Govindan V. Improving Zinc and Iron Biofortification in Wheat through Genomics Approaches. Mol Biol Rep 2022; 49:8007-8023. [PMID: 35661970 PMCID: PMC9165711 DOI: 10.1007/s11033-022-07326-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 02/09/2022] [Accepted: 03/02/2022] [Indexed: 11/27/2022]
Abstract
Globally, about 20% of calories (energy) come from wheat. In some countries, it is more than 70%. More than 2 billion people are at risk for zinc deficiency and even more, people are at risk of iron deficiency, nearly a quarter of all children underage group of 5 are physically and cognitively stunted, and lack of dietary zinc is a major contributing factor. Biofortified wheat with elevated levels of zinc and iron has several potential advantages as a delivery vehicle for micronutrients in the diets of resource-poor consumers who depend on cereal-based diets. The conventional breeding strategies have been successful in the introduction of novel alleles for grain Zn and Fe that led to the release of competitive Zn enriched wheat varieties in South Asia. The major challenge over the next few decades will be to maintain the rates of genetic gains for grain yield along with increased grain Zn/Fe concentration to meet the food and nutritional security challenges. Therefore, to remain competitive, the performance of Zn-enhanced lines/varieties must be equal or superior to that of current non-biofortified elite lines/varieties. Since both yield and Zn content are invisible and quantitatively inherited traits except few intermediate effect QTL regions identified for grain Zn, increased breeding efforts and new approaches are required to combine them at high frequency, ensuring that Zn levels are steadily increased to the required levels across the breeding pipelines. The current review article provides a comprehensive list of genomic regions for enhancing grain Zn and Fe concentrations in wheat including key candidate gene families such NAS, ZIP, VLT, ZIFL, and YSL. Implementing forward breeding by taking advantage of the rapid cycling trait pipeline approaches would simultaneously introgress high Zn and Fe QTL into the high Zn and normal elite lines, further increasing Zn and Fe concentrations.
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Affiliation(s)
- Shabir Hussain Wani
- Mountain Research Centre for Field Crops, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, 192102 Khudwani, J&K India
| | - Kiran Gaikwad
- ICAR-Indian Agricultural Research Institute, Pusa Campus, 110012 New Delhi, India
| | - Ali Razzaq
- Centre of Agricultural Biochemistry and Biotechnology, University of Agriculture Faisalabad, 38040 Faisalabad, Pakistan
| | - Kajal Samantara
- Department of Genetics and Plant Breeding, Centurion University of Technology and Management, 761211 Odisha, India
| | - Manjeet Kumar
- ICAR-Indian Agricultural Research Institute, Pusa Campus, 110012 New Delhi, India
| | - Velu Govindan
- Global Wheat Program International Maize and Wheat Improvement Center Texcoco Mexico, Texcoco, Mexico
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18
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Kong D, Khan SA, Wu H, Liu Y, Ling HQ. Biofortification of iron and zinc in rice and wheat. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2022; 64:1157-1167. [PMID: 35396901 DOI: 10.1111/jipb.13262] [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: 03/09/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Iron and zinc are critical micronutrients for human health. Approximately two billion people suffer from iron and zinc deficiencies worldwide, most of whom rely on rice (Oryza sativa) and wheat (Triticum aestivum) as staple foods. Therefore, biofortifying rice and wheat with iron and zinc is an important and economical approach to ameliorate these nutritional deficiencies. In this review, we provide a brief introduction to iron and zinc uptake, translocation, storage, and signaling pathways in rice and wheat. We then discuss current progress in efforts to biofortify rice and wheat with iron and zinc. Finally, we provide future perspectives for the biofortification of rice and wheat with iron and zinc.
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Affiliation(s)
- Danyu Kong
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, 332900, Jiangxi, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, the Chinese Academy of Sciences, Beijing, 100101, China
| | - Sabaz Ali Khan
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, the Chinese Academy of Sciences, Beijing, 100101, China
- Department of Biotechnology, COMSATS University Islamabad-Abbottabad Campus, University Road, Abbottabad, 22060, Pakistan
| | - Huilan Wu
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, the Chinese Academy of Sciences, Beijing, 100101, China
| | - Yi Liu
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, 332900, Jiangxi, China
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, the Chinese Academy of Sciences, Beijing, 100101, China
| | - Hong-Qing Ling
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, the Chinese Academy of Sciences, Beijing, 100101, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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19
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Kumar A, Kaur G, Singh P, Meena V, Sharma S, Tiwari M, Bauer P, Pandey AK. Strategies and Bottlenecks in Hexaploid Wheat to Mobilize Soil Iron to Grains. FRONTIERS IN PLANT SCIENCE 2022; 13:863849. [PMID: 35574143 PMCID: PMC9100831 DOI: 10.3389/fpls.2022.863849] [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: 01/27/2022] [Accepted: 03/22/2022] [Indexed: 06/15/2023]
Abstract
Our knowledge of iron (Fe) uptake and mobilization in plants is mainly based on Arabidopsis and rice. Although multiple players of Fe homeostasis have been elucidated, there is a significant gap in our understanding of crop species, such as wheat. It is, therefore, imperative not only to understand the different hurdles for Fe enrichment in tissues but also to address specifically the knowns/unknowns involved in the plausible mechanism of Fe sensing, signaling, transport, and subsequent storage in plants. In the present review, a unique perspective has been described in light of recent knowledge generated in wheat, an economically important crop. The strategies to boost efficient Fe uptake, transcriptional regulation, and long-distance mobilization in grains have been discussed, emphasizing recent biotechnological routes to load Fe in grains. This article also highlights the new elements of physiological and molecular genetics that underpin the mechanistic insight for the identified Fe-related genes and discusses the bottlenecks in unloading the Fe in grains. The information presented here will provide much-needed resources and directions to overcome challenges and design efficient strategies to enhance the Fe density in wheat grains.
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Affiliation(s)
- Anil Kumar
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Gazaldeep Kaur
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Palvinder Singh
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Varsha Meena
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Shivani Sharma
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Manish Tiwari
- CSIR-National Botanical Research Institute, Lucknow, India
| | - Petra Bauer
- Institute of Botany, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- Cluster of Excellence on Plant Sciences, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Ajay Kumar Pandey
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
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20
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Current Status and Potential of Biofortification to Enhance Crop Nutritional Quality: An Overview. SUSTAINABILITY 2022. [DOI: 10.3390/su14063301] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Around 2 billion people are suffering from chronic malnutrition or “hidden hunger”, which is the result of many diseases and disorders, including cognitive degeneration, stunting growth, and mortality. Thus, biofortification of staple food crops enriched with micronutrients is a more sustainable option for providing nutritional supplements and managing malnutrition in a society. Since 2001, when the concept of biofortification came to light, different research activities have been carried out, like the development of target populations, breeding or genetic engineering, and the release of biofortified cultivars, in addition to conducting nutritional efficacy trials and delivery plan development. Although, being a cost-effective intervention, it still faces many challenges, like easy accessibility of biofortified cultivars, stakeholders’ acceptance, and the availability of biofortified germplasm in the public domain, which varies from region to region. Hence, this review is focused on the recent potential, efforts made to crop biofortification, impacts analysis on human health, cost-effectiveness, and future perspectives to further strengthen biofortification programs. Through regular interventions of sustainable techniques and methodologies, biofortification holds huge potential to solve the malnutrition problem through regular interventions of nutrient-enriched staple food options for billions of people globally.
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21
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Harnessing the Wild Relatives and Landraces for Fe and Zn Biofortification in Wheat through Genetic Interventions—A Review. SUSTAINABILITY 2021. [DOI: 10.3390/su132312975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Micronutrient deficiencies, particularly iron (Fe) and zinc (Zn), in human diets are affecting over three billion people globally, especially in developing nations where diet is cereal-based. Wheat is one of several important cereal crops that provide food calories to nearly one-third of the population of the world. However, the bioavailability of Zn and Fe in wheat is inherently low, especially under Zn deficient soils. Although various fortification approaches are available, biofortification, i.e., development of mineral-enriched cultivars, is an efficient and sustainable approach to alleviate malnutrition. There is enormous variability in Fe and Zn in wheat germplasm, especially in wild relatives, but this is not utilized to the full extent. Grain Fe and Zn are quantitatively inherited, but high-heritability and genetic correlation at multiple locations indicate the high stability of Fe and Zn in wheat. In the last decade, pre-breeding activities have explored the potential of wild relatives to develop Fe and Zn rich wheat varieties. Furthermore, recent advances in molecular biology have improved the understanding of the uptake, storage, and bioavailability of Fe and Zn. Various transportation proteins encoding genes like YSL 2, IRT 1, OsNAS 3, VIT 1, and VIT 2 have been identified for Fe and Zn uptake, transfer, and accumulation at different developing stages. Hence, the availability of major genomic regions for Fe and Zn content and genome editing technologies are likely to result in high-yielding Fe and Zn biofortified wheat varieties. This review covers the importance of wheat wild relatives for Fe and Zn biofortification, progress in genomics-assisted breeding, and transgenic breeding for improving Fe and Zn content in wheat.
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22
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Scharff LB, Saltenis VLR, Jensen PE, Baekelandt A, Burgess AJ, Burow M, Ceriotti A, Cohan J, Geu‐Flores F, Halkier BA, Haslam RP, Inzé D, Klein Lankhorst R, Murchie EH, Napier JA, Nacry P, Parry MAJ, Santino A, Scarano A, Sparvoli F, Wilhelm R, Pribil M. Prospects to improve the nutritional quality of crops. Food Energy Secur 2021. [DOI: 10.1002/fes3.327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Lars B. Scharff
- Department of Plant and Environmental Sciences Copenhagen Plant Science Centre University of Copenhagen Frederiksberg Denmark
| | - Vandasue L. R. Saltenis
- Department of Plant and Environmental Sciences Copenhagen Plant Science Centre University of Copenhagen Frederiksberg Denmark
| | - Poul Erik Jensen
- Department of Food Science University of Copenhagen Frederiksberg Denmark
| | - Alexandra Baekelandt
- Department of Plant Biotechnology and Bioinformatics Ghent University Ghent Belgium
- VIB Center for Plant Systems Biology Ghent Belgium
| | | | - Meike Burow
- DynaMo Center Copenhagen Plant Science Centre Department of Plant and Environmental Sciences University of Copenhagen Frederiksberg Denmark
| | - Aldo Ceriotti
- Institute of Agricultural Biology and Biotechnology National Research Council (CNR) Milan Italy
| | | | - Fernando Geu‐Flores
- Department of Plant and Environmental Sciences Copenhagen Plant Science Centre University of Copenhagen Frederiksberg Denmark
| | - Barbara Ann Halkier
- DynaMo Center Copenhagen Plant Science Centre Department of Plant and Environmental Sciences University of Copenhagen Frederiksberg Denmark
| | | | - Dirk Inzé
- Department of Plant Biotechnology and Bioinformatics Ghent University Ghent Belgium
| | - René Klein Lankhorst
- Wageningen Plant Research Wageningen University & Research Wageningen The Netherlands
| | - Erik H. Murchie
- School of Biosciences University of Nottingham Loughborough UK
| | | | - Philippe Nacry
- BPMPUniv MontpellierINRAECNRSMontpellier SupAgro Montpellier France
| | | | - Angelo Santino
- Institute of Sciences of Food Production (ISPA) National Research Council (CNR) Lecce Italy
| | - Aurelia Scarano
- Institute of Sciences of Food Production (ISPA) National Research Council (CNR) Lecce Italy
| | - Francesca Sparvoli
- DynaMo Center Copenhagen Plant Science Centre Department of Plant and Environmental Sciences University of Copenhagen Frederiksberg Denmark
| | - Ralf Wilhelm
- Institute for Biosafety in Plant Biotechnology Julius Kühn‐Institut – Federal Research Centre for Cultivated Plants Quedlinburg Germany
| | - Mathias Pribil
- Department of Plant and Environmental Sciences Copenhagen Plant Science Centre University of Copenhagen Frederiksberg Denmark
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Shahzad R, Jamil S, Ahmad S, Nisar A, Khan S, Amina Z, Kanwal S, Aslam HMU, Gill RA, Zhou W. Biofortification of Cereals and Pulses Using New Breeding Techniques: Current and Future Perspectives. Front Nutr 2021; 8:721728. [PMID: 34692743 PMCID: PMC8528959 DOI: 10.3389/fnut.2021.721728] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 08/23/2021] [Indexed: 12/25/2022] Open
Abstract
Cereals and pulses are consumed as a staple food in low-income countries for the fulfillment of daily dietary requirements and as a source of micronutrients. However, they are failing to offer balanced nutrition due to deficiencies of some essential compounds, macronutrients, and micronutrients, i.e., cereals are deficient in iron, zinc, some essential amino acids, and quality proteins. Meanwhile, the pulses are rich in anti-nutrient compounds that restrict the bioavailability of micronutrients. As a result, the population is suffering from malnutrition and resultantly different diseases, i.e., anemia, beriberi, pellagra, night blindness, rickets, and scurvy are common in the society. These facts highlight the need for the biofortification of cereals and pulses for the provision of balanced diets to masses and reduction of malnutrition. Biofortification of crops may be achieved through conventional approaches or new breeding techniques (NBTs). Conventional approaches for biofortification cover mineral fertilization through foliar or soil application, microbe-mediated enhanced uptake of nutrients, and conventional crossing of plants to obtain the desired combination of genes for balanced nutrient uptake and bioavailability. Whereas, NBTs rely on gene silencing, gene editing, overexpression, and gene transfer from other species for the acquisition of balanced nutritional profiles in mutant plants. Thus, we have highlighted the significance of conventional and NBTs for the biofortification of cereals and pulses. Current and future perspectives and opportunities are also discussed. Further, the regulatory aspects of newly developed biofortified transgenic and/or non-transgenic crop varieties via NBTs are also presented.
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Affiliation(s)
- Rahil Shahzad
- Agricultural Biotechnology Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Shakra Jamil
- Agricultural Biotechnology Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Shakeel Ahmad
- Maize Research Station, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | - Amina Nisar
- Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan
| | - Sipper Khan
- Tropics and Subtropics Group, Institute of Agricultural Engineering, University of Hohenheim, Stuttgart, Germany
| | - Zarmaha Amina
- Tropics and Subtropics Group, Institute of Agricultural Engineering, University of Hohenheim, Stuttgart, Germany
| | - Shamsa Kanwal
- Agricultural Biotechnology Research Institute, Ayub Agricultural Research Institute, Faisalabad, Pakistan
| | | | - Rafaqat Ali Gill
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, The Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Weijun Zhou
- Key Laboratory of Spectroscopy Sensing, The Ministry of Agriculture and Rural Affairs, Institute of Crop Science, Zhejiang University, Hangzhou, China
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Wang W, Guo H, Wu C, Yu H, Li X, Chen G, Tian J, Deng Z. Identification of novel genomic regions associated with nine mineral elements in Chinese winter wheat grain. BMC PLANT BIOLOGY 2021; 21:311. [PMID: 34210282 PMCID: PMC8252321 DOI: 10.1186/s12870-021-03105-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/14/2021] [Indexed: 05/08/2023]
Abstract
BACKGROUND Mineral elements are important for maintaining good human health besides heavy metals. Mining genes that control mineral elements are paramount for improving their accumulation in the wheat grain. Although previous studies have reported some loci for beneficial trace elements, they have mainly focused on Zn and Fe content. However, little information is available regarding the genetic loci differences in dissecting synchronous accumulation of multiple mineral elements in wheat grains, including beneficial and heavy elements. Therefore, a genome-wide association study (GWAS) was conducted on 205 wheat accessions with 24,355 single nucleotide polymorphisms (SNPs) to identify important loci and candidate genes for controlling Ca, Fe, Zn, Se, Cu, Mn, Cd, As, and Pb accumulation in wheat grains. RESULTS A total of 101 marker-trait associations (MTAs) (P < 10-5) loci affecting the content of nine mineral elements was identified on chromosomes 1B, 1D, 2A, 2B, 3A, 3B, 3D, 4A, 4B, 5A, 5B, 5D, 6B, 7A, 7B, and 7D. Among these, 17 major MTAs loci for the nine mineral elements were located, and four MTAs loci (P < 10-5) were found on chromosomes 1B, 6B, 7B, and 7D. Eight multi-effect MTAs loci were detected that are responsible for the control of more than one trait, mainly distributed on chromosomes 3B, 7B, and 5A. Furthermore, sixteen candidate genes controlling Ca, Fe, Zn, Se, Cd, and Pb were predicted, whose functions were primarily related to ion binding, including metals, Fe, Ca, Cu, Mg, and Zn, ATP binding, ATPase activity, DNA binding, RNA binding, and protein kinase activity. CONCLUSIONS Our study indicated the existence of gene interactions among mineral elements based on multi-effect MTAs loci and candidate genes. Meanwhile this study provided new insights into the genetic control of mineral element concentrations, and the important loci and genes identified may contribute to the rapid development of beneficial mineral elements and a reduced content of harmful heavy metals in wheat grain.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China
| | - Hong Guo
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China
| | - Chongning Wu
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China
| | - Hui Yu
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China
| | - Xiaokang Li
- Handan Academy of Agricultural Sciences, Handan, Hebei, 056000, P.R. China
| | - Guangfeng Chen
- College of Ecology and Garden Architecture, Dezhou University, Dezhou, Shandong, 253023, P.R. China
| | - Jichun Tian
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China
| | - Zhiying Deng
- State Key Laboratory of Crop Biology, Key Laboratory of Crop Biology of Shandong Province, Group of Wheat Quality and Molecular Breeding, College of Agronomy, Shandong Agricultural University, Tai'an, Shandong, 271000, P.R. China.
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Przybyla-Toscano J, Boussardon C, Law SR, Rouhier N, Keech O. Gene atlas of iron-containing proteins in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2021; 106:258-274. [PMID: 33423341 DOI: 10.1111/tpj.15154] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 12/17/2020] [Accepted: 01/04/2021] [Indexed: 05/27/2023]
Abstract
Iron (Fe) is an essential element for the development and physiology of plants, owing to its presence in numerous proteins involved in central biological processes. Here, we established an exhaustive, manually curated inventory of genes encoding Fe-containing proteins in Arabidopsis thaliana, and summarized their subcellular localization, spatiotemporal expression and evolutionary age. We have currently identified 1068 genes encoding potential Fe-containing proteins, including 204 iron-sulfur (Fe-S) proteins, 446 haem proteins and 330 non-Fe-S/non-haem Fe proteins (updates of this atlas are available at https://conf.arabidopsis.org/display/COM/Atlas+of+Fe+containing+proteins). A fourth class, containing 88 genes for which iron binding is uncertain, is indexed as 'unclear'. The proteins are distributed in diverse subcellular compartments with strong differences per category. Interestingly, analysis of the gene age index showed that most genes were acquired early in plant evolutionary history and have progressively gained regulatory elements, to support the complex organ-specific and development-specific functions necessitated by the emergence of terrestrial plants. With this gene atlas, we provide a valuable and updateable tool for the research community that supports the characterization of the molecular actors and mechanisms important for Fe metabolism in plants. This will also help in selecting relevant targets for breeding or biotechnological approaches aiming at Fe biofortification in crops.
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Affiliation(s)
| | - Clément Boussardon
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, S-90187, Sweden
| | - Simon R Law
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, S-90187, Sweden
| | | | - Olivier Keech
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, Umeå, S-90187, Sweden
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Kawakami Y, Bhullar NK. Delineating the future of iron biofortification studies in rice: challenges and future perspectives. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:2099-2113. [PMID: 32974681 DOI: 10.1093/jxb/eraa446] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 06/11/2023]
Abstract
Iron (Fe) deficiency in humans is a widespread problem worldwide. Fe biofortification of rice (Oryza sativa) is a promising approach to address human Fe deficiency. Since its conceptualization, various biofortification strategies have been developed, some of which have resulted in significant increases in grain Fe concentration. However, there are still many aspects that have not yet been addressed in the studies to date. In this review, we first overview the important rice Fe biofortification strategies reported to date and the complications associated with them. Next, we highlight the key outstanding questions and hypotheses related to rice Fe biofortification. Finally, we make suggestions for the direction of future rice biofortification studies.
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Affiliation(s)
- Yuta Kawakami
- Plant Biotechnology, Department of Biology, ETH Zurich, Universitätstrasse 2, Zurich, Switzerland
| | - Navreet K Bhullar
- Plant Biotechnology, Department of Biology, ETH Zurich, Universitätstrasse 2, Zurich, Switzerland
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Food fortification technologies: Influence on iron, zinc and vitamin A bioavailability and potential implications on micronutrient deficiency in sub-Saharan Africa. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2020.e00667] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Gupta PK, Balyan HS, Sharma S, Kumar R. Biofortification and bioavailability of Zn, Fe and Se in wheat: present status and future prospects. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2021; 134:1-35. [PMID: 33136168 DOI: 10.1007/s00122-020-03709-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/13/2020] [Indexed: 05/02/2023]
Abstract
Knowledge of genetic variation, genetics, physiology/molecular basis and breeding (including biotechnological approaches) for biofortification and bioavailability for Zn, Fe and Se will help in developing nutritionally improved wheat. Biofortification of wheat cultivars for micronutrients is a priority research area for wheat geneticists and breeders. It is known that during breeding of wheat cultivars for productivity and quality, a loss of grain micronutrient contents occurred, leading to decline in nutritional quality of wheat grain. Keeping this in view, major efforts have been made during the last two decades for achieving biofortification and bioavailability of wheat grain for micronutrients including Zn, Fe and Se. The studies conducted so far included evaluation of gene pools for contents of not only grain micronutrients as above, but also for phytic acid (PA) or phytate and phytase, so that, while breeding for the micronutrients, bioavailability is also improved. For this purpose, QTL interval mapping and GWAS were carried out to identify QTLs/genes and associated markers that were subsequently used for marker-assisted selection (MAS) during breeding for biofortification. Studies have also been conducted to understand the physiology and molecular basis of biofortification, which also allowed identification of genes for uptake, transport and storage of micronutrients. Transgenics using transgenes have also been produced. The breeding efforts led to the development of at least a dozen cultivars with improved contents of grain micronutrients, although land area occupied by these biofortified cultivars is still marginal. In this review, the available information on different aspects of biofortification and bioavailability of micronutrients including Zn, Fe and Se in wheat has been reviewed for the benefit of those, who plan to start work or already conducting research in this area.
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Affiliation(s)
- P K Gupta
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, U.P, 250004, India.
| | - H S Balyan
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, U.P, 250004, India
| | - Shailendra Sharma
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, U.P, 250004, India
| | - Rahul Kumar
- Department of Genetics and Plant Breeding, Chaudhary Charan Singh University, Meerut, U.P, 250004, India
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Tong J, Sun M, Wang Y, Zhang Y, Rasheed A, Li M, Xia X, He Z, Hao Y. Dissection of Molecular Processes and Genetic Architecture Underlying Iron and Zinc Homeostasis for Biofortification: From Model Plants to Common Wheat. Int J Mol Sci 2020; 21:E9280. [PMID: 33291360 PMCID: PMC7730113 DOI: 10.3390/ijms21239280] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 11/28/2020] [Accepted: 12/01/2020] [Indexed: 02/07/2023] Open
Abstract
The micronutrients iron (Fe) and zinc (Zn) are not only essential for plant survival and proliferation but are crucial for human health. Increasing Fe and Zn levels in edible parts of plants, known as biofortification, is seen a sustainable approach to alleviate micronutrient deficiency in humans. Wheat, as one of the leading staple foods worldwide, is recognized as a prioritized choice for Fe and Zn biofortification. However, to date, limited molecular and physiological mechanisms have been elucidated for Fe and Zn homeostasis in wheat. The expanding molecular understanding of Fe and Zn homeostasis in model plants is providing invaluable resources to biofortify wheat. Recent advancements in NGS (next generation sequencing) technologies coupled with improved wheat genome assembly and high-throughput genotyping platforms have initiated a revolution in resources and approaches for wheat genetic investigations and breeding. Here, we summarize molecular processes and genes involved in Fe and Zn homeostasis in the model plants Arabidopsis and rice, identify their orthologs in the wheat genome, and relate them to known wheat Fe/Zn QTL (quantitative trait locus/loci) based on physical positions. The current study provides the first inventory of the genes regulating grain Fe and Zn homeostasis in wheat, which will benefit gene discovery and breeding, and thereby accelerate the release of Fe- and Zn-enriched wheats.
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Affiliation(s)
- Jingyang Tong
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Mengjing Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Yue Wang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Yong Zhang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Awais Rasheed
- International Maize and Wheat Improvement Center (CIMMYT) China Office, c/o CAAS, 12 Zhongguancun South Street, Beijing 100081, China;
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Ming Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Xianchun Xia
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
| | - Zhonghu He
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
- International Maize and Wheat Improvement Center (CIMMYT) China Office, c/o CAAS, 12 Zhongguancun South Street, Beijing 100081, China;
| | - Yuanfeng Hao
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing 100081, China; (J.T.); (M.S.); (Y.W.); (Y.Z.); (M.L.); (X.X.)
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31
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Ali MW, Borrill P. Applying genomic resources to accelerate wheat biofortification. Heredity (Edinb) 2020; 125:386-395. [PMID: 32528079 DOI: 10.1038/s41437-020-0326-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 02/06/2023] Open
Abstract
Wheat has low levels of the micronutrients iron and zinc in the grain, which contributes to 2 billion people suffering from micronutrient deficiency globally. While wheat flour is commonly fortified during processing, an attractive and more sustainable solution is biofortification, which could improve micronutrient content in the human diet, without the sustainability issues and costs associated with conventional fortification. Although many studies have used quantitative trait loci mapping and genome-wide association to identify genetic loci to improve micronutrient contents, recent developments in genomics offer an opportunity to accelerate marker discovery and use gene-focussed approaches to engineer improved micronutrient content in wheat. The recent publication of a high-quality wheat genome sequence, alongside gene expression atlases, variation datasets and sequenced mutant populations, provides a foundation to identify genetic loci and genes controlling micronutrient content in wheat. We discuss how novel genomic resources can identify candidate genes for biofortification, integrating knowledge from other cereal crops, and how these genes can be tested using gene editing, transgenic and TILLING approaches. Finally, we highlight key challenges remaining to develop wheat cultivars with high levels of iron and zinc.
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Affiliation(s)
- Muhammad Waqas Ali
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Philippa Borrill
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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32
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Kawakami Y, Bhullar NK. Potential Implications of Interactions between Fe and S on Cereal Fe Biofortification. Int J Mol Sci 2020; 21:E2827. [PMID: 32325653 PMCID: PMC7216021 DOI: 10.3390/ijms21082827] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 01/17/2023] Open
Abstract
Iron (Fe) and sulfur (S) are two essential elements for plants, whose interrelation is indispensable for numerous physiological processes. In particular, Fe homeostasis in cereal species is profoundly connected to S nutrition because phytosiderophores, which are the metal chelators required for Fe uptake and translocation in cereals, are derived from a S-containing amino acid, methionine. To date, various biotechnological cereal Fe biofortification strategies involving modulation of genes underlying Fe homeostasis have been reported. Meanwhile, the resultant Fe-biofortified crops have been minimally characterized from the perspective of interaction between Fe and S, in spite of the significance of the crosstalk between the two elements in cereals. Here, we intend to highlight the relevance of Fe and S interrelation in cereal Fe homeostasis and illustrate the potential implications it has to offer for future cereal Fe biofortification studies.
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Affiliation(s)
| | - Navreet K. Bhullar
- Plant Biotechnology, Department of Biology, ETH Zurich, Universitätstrasse 2, 8092 Zurich, Switzerland;
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33
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Zhu Q, Wang B, Tan J, Liu T, Li L, Liu YG. Plant Synthetic Metabolic Engineering for Enhancing Crop Nutritional Quality. PLANT COMMUNICATIONS 2020; 1:100017. [PMID: 33404538 PMCID: PMC7747972 DOI: 10.1016/j.xplc.2019.100017] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/05/2019] [Accepted: 12/17/2019] [Indexed: 05/08/2023]
Abstract
Nutrient deficiencies in crops are a serious threat to human health, especially for populations in poor areas. To overcome this problem, the development of crops with nutrient-enhanced traits is imperative. Biofortification of crops to improve nutritional quality helps combat nutrient deficiencies by increasing the levels of specific nutrient components. Compared with agronomic practices and conventional plant breeding, plant metabolic engineering and synthetic biology strategies are more effective and accurate in synthesizing specific micronutrients, phytonutrients, and/or bioactive components in crops. In this review, we discuss recent progress in the field of plant synthetic metabolic engineering, specifically in terms of research strategies of multigene stacking tools and engineering complex metabolic pathways, with a focus on improving traits related to micronutrients, phytonutrients, and bioactive components. Advances and innovations in plant synthetic metabolic engineering would facilitate the development of nutrient-enriched crops to meet the nutritional needs of humans.
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Affiliation(s)
- Qinlong Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Bin Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Jiantao Tan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Taoli Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Li Li
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14850, USA
- Plant Breeding and Genetics Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14850, USA
| | - Yao-Guang Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- Corresponding author
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Chandra AK, Kumar A, Bharati A, Joshi R, Agrawal A, Kumar S. Microbial-assisted and genomic-assisted breeding: a two way approach for the improvement of nutritional quality traits in agricultural crops. 3 Biotech 2020; 10:2. [PMID: 31824813 DOI: 10.1007/s13205-019-1994-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 11/18/2019] [Indexed: 12/19/2022] Open
Abstract
Both human and animals, for their nutritional requirements, mainly rely on the plant-based foods, which provide a wide range of nutrients. Minerals, proteins, vitamins are among the nutrients which are essential and need to be available in adequate amount in edible portion of the staple crops. Increasing nutritional content in staple crops either through agronomic biofortification or through conventional plant-breeding strategies continue to be a huge task for scientists around the globe. Although some success has been achieved in recent past, in most cases, we have fallen short of expected targets. To maximize the nutrient uptake and partitioning to different economic part of plants, scientists have employed and tailored several biofortification strategies. But in present agricultural and environmental concerns, these approaches are not much effective. Henceforth, we are highlighting the recent developments and promising aspects of microbial-assisted and genomic-assisted breeding as candidate biofortification approach, that have contributed significantly in increasing nutritional content in grains of different crops. The methods used to date to accomplish nutrient enrichment with recently emerging strategies that we believe could be the most promising and holistic approach for future biofortification program. Results are encouraging, but for future perspective, the existing knowledge about the strategies needs to be confined. Concerted scientific investment are required to widen up these biofortification strategies, so that it could play an important role in ensuring nutritional security of ever-growing population in growing agricultural and environmental constraints.
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Wang M, Kawakami Y, Bhullar NK. Molecular Analysis of Iron Deficiency Response in Hexaploid Wheat. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2019. [DOI: 10.3389/fsufs.2019.00067] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Khan S, Anwar S, Yu S, Sun M, Yang Z, Gao ZQ. Development of Drought-Tolerant Transgenic Wheat: Achievements and Limitations. Int J Mol Sci 2019; 20:E3350. [PMID: 31288392 PMCID: PMC6651533 DOI: 10.3390/ijms20133350] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 01/25/2023] Open
Abstract
Crop yield improvement is necessary to keep pace with increasing demand for food. Due to climatic variability, the incidence of drought stress at crop growth stages is becoming a major hindering factor to yield improvement. New techniques are required to increase drought tolerance along with improved yield. Genetic modification for increasing drought tolerance is highly desirable, and genetic engineering for drought tolerance requires the expression of certain stress-related genes. Genes have been identified which confer drought tolerance and improve plant growth and survival in transgenic wheat. However, less research has been conducted for the development of transgenic wheat as compared to rice, maize, and other staple food. Furthermore, enhanced tolerance to drought without any yield penalty is a major task of genetic engineering. In this review, we have focused on the progress in the development of transgenic wheat cultivars for improving drought tolerance and discussed the physiological mechanisms and testing of their tolerance in response to inserted genes under control or field conditions.
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Affiliation(s)
- Shahbaz Khan
- College of Agriculture, Shanxi Agricultural University, Taigu 030801, China
| | - Sumera Anwar
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
| | - Shaobo Yu
- College of Agriculture, Shanxi Agricultural University, Taigu 030801, China
| | - Min Sun
- College of Agriculture, Shanxi Agricultural University, Taigu 030801, China
| | - Zhenping Yang
- College of Agriculture, Shanxi Agricultural University, Taigu 030801, China
| | - Zhi-Qiang Gao
- College of Agriculture, Shanxi Agricultural University, Taigu 030801, China.
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Connorton JM, Balk J. Iron Biofortification of Staple Crops: Lessons and Challenges in Plant Genetics. PLANT & CELL PHYSIOLOGY 2019; 60:1447-1456. [PMID: 31058958 PMCID: PMC6619672 DOI: 10.1093/pcp/pcz079] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/23/2019] [Indexed: 05/19/2023]
Abstract
Plants are the ultimate source of iron in our diet, either directly as staple crops and vegetables or indirectly via animal fodder. Increasing the iron concentration of edible parts of plants, known as biofortification, is seen as a sustainable approach to alleviate iron deficiency which is a major global health issue. Advances in sequencing and gene technology are accelerating both forward and reverse genetic approaches. In this review, we summarize recent progress in iron biofortification using conventional plant breeding or transgenics. Interestingly, some of the gene targets already used for transgenic approaches are also identified as genetic factors for high iron in genome-wide association studies. Several quantitative trait loci and transgenes increase both iron and zinc, due to overlap in transporters and chelators for these two mineral micronutrients. Research efforts are predominantly aimed at increasing the total concentration of iron but enhancing its bioavailability is also addressed. In particular, increased biosynthesis of the metal chelator nicotianamine increases iron and zinc levels and improves bioavailability. The achievements to date are very promising in being able to provide sufficient iron in diets with less reliance on meat to feed a growing world population.
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Affiliation(s)
- James M Connorton
- Department of Biological Chemistry, John Innes Centre, Norwich, UK
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Janneke Balk
- Department of Biological Chemistry, John Innes Centre, Norwich, UK
- School of Biological Sciences, University of East Anglia, Norwich, UK
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Kumar S, Palve A, Joshi C, Srivastava RK, Rukhsar. Crop biofortification for iron (Fe), zinc (Zn) and vitamin A with transgenic approaches. Heliyon 2019; 5:e01914. [PMID: 31338452 PMCID: PMC6579847 DOI: 10.1016/j.heliyon.2019.e01914] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/07/2019] [Accepted: 06/03/2019] [Indexed: 11/20/2022] Open
Abstract
Micronutrient malnutrition is an important issue in the developing countries especially in Asia and Africa where millions of school-going children and pregnant women are affected. Poor people are more exposed to risks of malnutrition and hidden hunger due to intake of carbohydrate rich but micronutrient deficient plant based food. The expansion of high yielding but micronutrient poor cultivars further intensified the malnutrition. The existing approaches viz., supplementation and food fortification of staple food with minerals and vitamins can address the issue of adequate nutrition security. But supplementation and fortification is neither feasible for each nutrient specially iron nor viable due to recurrent cost. Recently, genetic bio-fortification of crops is emerged as self-targeted and non-recurrent approach to address the micronutrient malnutrition. Most of the traditional breeding approaches were limited due to non-availability of enough genetic variation in the crossable genepools. Additionally, it also lacks the modulation of target gene expression underlying the micronutrient accumulation. At this juncture, genetic engineering based food biofortification is promising way to address the hidden hunger especially, where breeding is not rewarding due to lack of genetic variability. Genetic modification through gene technology is swift and accurate method to develop nutrient denser crops without any recurrent investment as compared to different strategies.
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Affiliation(s)
- Sushil Kumar
- Centre of Excellence in Agricultural Biotechnology, Anand Agricultural University, Anand, India
| | - Adinath Palve
- Centre of Excellence in Agricultural Biotechnology, Anand Agricultural University, Anand, India
| | - Chitra Joshi
- Centre of Excellence in Agricultural Biotechnology, Anand Agricultural University, Anand, India
| | - Rakesh K. Srivastava
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, India
| | - Rukhsar
- Centre of Excellence in Agricultural Biotechnology, Anand Agricultural University, Anand, India
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Genetic Modification for Wheat Improvement: From Transgenesis to Genome Editing. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6216304. [PMID: 30956982 PMCID: PMC6431451 DOI: 10.1155/2019/6216304] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/08/2019] [Accepted: 02/21/2019] [Indexed: 12/12/2022]
Abstract
To feed the growing human population, global wheat yields should increase to approximately 5 tonnes per ha from the current 3.3 tonnes by 2050. To reach this goal, existing breeding practices must be complemented with new techniques built upon recent gains from wheat genome sequencing, and the accumulated knowledge of genetic determinants underlying the agricultural traits responsible for crop yield and quality. In this review we primarily focus on the tools and techniques available for accessing gene functions which lead to clear phenotypes in wheat. We provide a view of the development of wheat transformation techniques from a historical perspective, and summarize how techniques have been adapted to obtain gain-of-function phenotypes by gene overexpression, loss-of-function phenotypes by expressing antisense RNAs (RNA interference or RNAi), and most recently the manipulation of gene structure and expression using site-specific nucleases, such as CRISPR/Cas9, for genome editing. The review summarizes recent successes in the application of wheat genetic manipulation to increase yield, improve nutritional and health-promoting qualities in wheat, and enhance the crop's resistance to various biotic and abiotic stresses.
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Ludwig Y, Slamet-Loedin IH. Genetic Biofortification to Enrich Rice and Wheat Grain Iron: From Genes to Product. FRONTIERS IN PLANT SCIENCE 2019; 10:833. [PMID: 31379889 PMCID: PMC6646660 DOI: 10.3389/fpls.2019.00833] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/11/2019] [Indexed: 05/02/2023]
Abstract
The micronutrient iron (Fe) is not only essential for plant survival and proliferation but also crucial for healthy human growth and development. Rice and wheat are the two leading staples globally; unfortunately, popular rice and wheat cultivars only have a minuscule amount of Fe content and mainly present in the outer bran layers. Unavailability of considerable Fe-rich rice and wheat germplasms limits the potential of conventional breeding to develop this micronutrient trait in both staples. Agronomic biofortification, defined as soil and foliar fertilizer application, has potential but remains quite challenging to improve grain Fe to the significant level. In contrast, recent accomplishments in genetic biofortification can help to develop Fe-enriched cereal grains to sustainably address the problem of "hidden hunger" when the roadmap from proof of concept to product and adoption can be achieved. Here, we highlight the different genetic biofortification strategies for rice and wheat and path to develop a product.
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Palmer LJ, Stangoulis JCR. Changes in the Elemental and Metabolite Profile of Wheat Phloem Sap during Grain Filling Indicate a Dynamic between Plant Maturity and Time of Day. Metabolites 2018; 8:E53. [PMID: 30235829 PMCID: PMC6160947 DOI: 10.3390/metabo8030053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/12/2018] [Accepted: 09/18/2018] [Indexed: 01/27/2023] Open
Abstract
The long distance transport of Fe and Zn in the phloem sap of wheat (Triticum aestivum L.) is the key route for seed supply, due to wheat having a xylem discontinuity. To date, our knowledge is limited on Fe and Zn homeostasis in the phloem sap during the reproductive and grain filling stages. With the use of aphid stylectomy to collect samples of phloem sap, we explored maturity and morning versus afternoon (within-day) changes in nutrient and metabolite profiles. Phloem exudate was collected from a wheat breeding line, SAMNYT16, at three times during the grain filling period and at both midday and mid-afternoon. There were significant changes in the concentration of Mg, K, Fe and Zn during the course of grain loading and there were also significant within-day differences for Fe and K concentrations in the phloem exudate during the early phases of grain development. We found that, for K and Fe, there was an increase of 1.1- and 1.4-fold, respectively, for samples taken prior to midday to those from mid-afternoon. There was also a significant decrease in K, Fe and Zn phloem sap concentration of 1.5-, 1.4- and 1.1-fold, respectively, from the start of peak grain loading to the end of grain loading. Of the 79 metabolites detected within samples of phloem exudate, 43 had significant maturity differences and 38 had significant within-day variability. Glutamine was found to increase by 3.3⁻5.9-fold from midday to mid-afternoon and citric acid was found to decrease by 1.6-fold from the start of grain loading to the end of grain loading. These two metabolites are of interest as they can complex metal ions and may play a role in long distance transport of metal ions. The work presented here gives further insight into the complex composition of the phloem sap and variability that can occur during the day and also with increasing maturity.
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Affiliation(s)
- Lachlan J Palmer
- Biological Sciences, College of Science and Engineering, Flinders University, Bedford Park 5042, Australia.
| | - James C R Stangoulis
- Biological Sciences, College of Science and Engineering, Flinders University, Bedford Park 5042, Australia.
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Izquierdo P, Astudillo C, Blair MW, Iqbal AM, Raatz B, Cichy KA. Meta-QTL analysis of seed iron and zinc concentration and content in common bean (Phaseolus vulgaris L.). TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2018; 131:1645-1658. [PMID: 29752522 DOI: 10.1007/s00122-018-3104-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 05/02/2018] [Indexed: 05/03/2023]
Abstract
Twelve meta-QTL for seed Fe and Zn concentration and/or content were identified from 87 QTL originating from seven population grown in sixteen field trials. These meta-QTL include 2 specific to iron, 2 specific to zinc and 8 that co-localize for iron and zinc concentrations and/or content. Common bean (Phaseolus vulgaris L.) is the most important legume for human consumption worldwide and it is an important source of microelements, especially iron and zinc. Bean biofortification breeding programs develop new varieties with high levels of Fe and Zn targeted for countries with human micronutrient deficiencies. Biofortification efforts thus far have relied on phenotypic selection of raw seed mineral concentrations in advanced generations. While numerous quantitative trait loci (QTL) studies have been conducted to identify genomic regions associated with increased Fe and Zn concentration in seeds, these results have yet to be employed for marker-assisted breeding. The objective of this study was to conduct a meta-analysis from seven QTL studies in Andean and Middle American intra- and inter-gene pool populations to identify the regions in the genome that control the Fe and Zn levels in seeds. Two meta-QTL specific to Fe and two meta-QTL specific to Zn were identified. Additionally, eight Meta QTL that co-localized for Fe and Zn concentration and/or content were identified across seven chromosomes. The Fe and Zn shared meta-QTL could be useful candidates for marker-assisted breeding to simultaneously increase seed Fe and Zn. The physical positions for 12 individual meta-QTL were identified and within five of the meta-QTL, candidate genes were identified from six gene families that have been associated with transport of iron and zinc in plants.
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Affiliation(s)
- Paulo Izquierdo
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Carolina Astudillo
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Matthew W Blair
- Department of Agricultural and Environmental Sciences, Tennessee State University, Nashville, TN, USA
| | - Asif M Iqbal
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA
| | - Bodo Raatz
- International Center for Tropical Agriculture, Cali, Colombia
| | - Karen A Cichy
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI, USA.
- Sugarbeet and Bean Research Unit, USDA-ARS East Lansing, East Lansing, MI, USA.
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Garnica M, Bacaicoa E, Mora V, San Francisco S, Baigorri R, Zamarreño AM, Garcia-Mina JM. Shoot iron status and auxin are involved in iron deficiency-induced phytosiderophores release in wheat. BMC PLANT BIOLOGY 2018; 18:105. [PMID: 29866051 PMCID: PMC5987636 DOI: 10.1186/s12870-018-1324-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 05/24/2018] [Indexed: 05/22/2023]
Abstract
BACKGROUND The release of phytosiderephores (PS) to the rhizosphere is the main root response to iron (Fe) deficiency in graminaceous plants. We have investigated the role of the Fe status in the shoot as well as of the signaling pathways controlled by three relevant phytoregulators - indolacetic acid (IAA), ethylene and nitric oxide (NO) - in the regulation of this root response in Fe-starved wheat plants. To this end, the PS accumulation in the nutrient solution and the root expression of the genes encoding the nicotianamine aminotransferase (TaNAAT) and ferritin (TaFER) have been evaluated in plants subjected to different treatments. RESULTS The application of Fe to leaves of Fe-deficient plants prevented the increase in both PS root release and TaNAAT gene expression thus showing the relevant role of the shoot to root communication in the regulation of PS root release and some steps of PS biosynthesis. Experiments with specific hormone inhibitors showed that while ethylene and NO did not positively regulate Fe-deficiency induced PS root release, auxin plays an essential role in the regulation of this process. Moreover, the application of IAA to Fe-sufficient plants promoted both PS root release and TaNAAT gene expression thus indicating that auxin might be involved in the shoot to root signaling network regulating Fe-deficiency root responses in wheat. CONCLUSIONS These results therefore indicate that PS root release in Fe-deficient wheat plants is directly modulated by the shoot Fe status through signaling pathways involving, among other possible effectors, auxin.
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Affiliation(s)
- Maria Garnica
- Department of Environmental Biology (BACh Group), School of Sciences, University of Navarra, Pamplona, Navarra Spain
| | - Eva Bacaicoa
- Department of Environmental Biology (BACh Group), School of Sciences, University of Navarra, Pamplona, Navarra Spain
| | - Veronica Mora
- Plant Physiology and Plant-Microorganism Laboratory, University of Rio Cuarto, Río Cuarto, Cordoba Argentina
| | - Sara San Francisco
- Technical and Development Department, Timac Agro Spain, Lodosa, Navarra Spain
| | - Roberto Baigorri
- Department of Environmental Biology (BACh Group), School of Sciences, University of Navarra, Pamplona, Navarra Spain
- Technical and Development Department, Timac Agro Spain, Lodosa, Navarra Spain
| | - Angel Mari Zamarreño
- Department of Environmental Biology (BACh Group), School of Sciences, University of Navarra, Pamplona, Navarra Spain
| | - Jose Maria Garcia-Mina
- Department of Environmental Biology (BACh Group), School of Sciences, University of Navarra, Pamplona, Navarra Spain
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Garg M, Sharma N, Sharma S, Kapoor P, Kumar A, Chunduri V, Arora P. Biofortified Crops Generated by Breeding, Agronomy, and Transgenic Approaches Are Improving Lives of Millions of People around the World. Front Nutr 2018; 5:12. [PMID: 29492405 PMCID: PMC5817065 DOI: 10.3389/fnut.2018.00012] [Citation(s) in RCA: 172] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 01/29/2018] [Indexed: 11/21/2022] Open
Abstract
Biofortification is an upcoming, promising, cost-effective, and sustainable technique of delivering micronutrients to a population that has limited access to diverse diets and other micronutrient interventions. Unfortunately, major food crops are poor sources of micronutrients required for normal human growth. The manuscript deals in all aspects of crop biofortification which includes-breeding, agronomy, and genetic modification. It tries to summarize all the biofortification research that has been conducted on different crops. Success stories of biofortification include lysine and tryptophan rich quality protein maize (World food prize 2000), Vitamin A rich orange sweet potato (World food prize 2016); generated by crop breeding, oleic acid, and stearidonic acid soybean enrichment; through genetic transformation and selenium, iodine, and zinc supplementation. The biofortified food crops, especially cereals, legumes, vegetables, and fruits, are providing sufficient levels of micronutrients to targeted populations. Although a greater emphasis is being laid on transgenic research, the success rate and acceptability of breeding is much higher. Besides the challenges biofortified crops hold a bright future to address the malnutrition challenge.
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Affiliation(s)
- Monika Garg
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Natasha Sharma
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Saloni Sharma
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Payal Kapoor
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | - Aman Kumar
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
| | | | - Priya Arora
- National Agri-Food Biotechnology Institute, Mohali, Punjab, India
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45
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Connorton JM, Balk J, Rodríguez-Celma J. Iron homeostasis in plants - a brief overview. Metallomics 2017; 9:813-823. [PMID: 28686269 PMCID: PMC5708359 DOI: 10.1039/c7mt00136c] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 06/28/2017] [Indexed: 01/04/2023]
Abstract
Iron plays a crucial role in biochemistry and is an essential micronutrient for plants and humans alike. Although plentiful in the Earth's crust it is not usually found in a form readily accessible for plants to use. They must therefore sense and interact with their environment, and have evolved two different molecular strategies to take up iron in the root. Once inside, iron is complexed with chelators and distributed to sink tissues where it is used predominantly in the production of enzyme cofactors or components of electron transport chains. The processes of iron uptake, distribution and metabolism are overseen by tight regulatory mechanisms, at the transcriptional and post-transcriptional level, to avoid iron concentrations building to toxic excess. Iron is also loaded into seeds, where it is stored in vacuoles or in ferritin. This is important for human nutrition as seeds form the edible parts of many crop species. As such, increasing iron in seeds and other tissues is a major goal for biofortification efforts by both traditional breeding and biotechnological approaches.
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Affiliation(s)
- James M Connorton
- John Innes Centre and University of East Anglia, Norwich Research Park, Norwich, NR4 7UH, UK.
| | - Janneke Balk
- John Innes Centre and University of East Anglia, Norwich Research Park, Norwich, NR4 7UH, UK.
| | - Jorge Rodríguez-Celma
- John Innes Centre and University of East Anglia, Norwich Research Park, Norwich, NR4 7UH, UK.
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Singh SP, Keller B, Gruissem W, Bhullar NK. Rice NICOTIANAMINE SYNTHASE 2 expression improves dietary iron and zinc levels in wheat. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2017; 130:283-292. [PMID: 27722771 PMCID: PMC5263203 DOI: 10.1007/s00122-016-2808-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 09/29/2016] [Indexed: 05/18/2023]
Abstract
KEY MESSAGE Iron and zinc deficiencies negatively impact human health worldwide. We developed wheat lines that meet or exceed recommended dietary target levels for iron and zinc in the grains. These lines represent useful germplasm for breeding new wheat varieties that can reduce iron and zinc deficiency-associated health burdens in the affected populations. Micronutrient deficiencies, including iron and zinc deficiencies, have negative impacts on human health globally. Iron-deficiency; anemia affects nearly two billion people worldwide and is the cause of reduced cognitive development, fatigue and overall low productivity. Similarly, zinc deficiency causes stunted growth, decreased immunity and increased risk of respiratory infections. Biofortification of staple crops is a sustainable and effective approach to reduce the burden of health problems associated with micronutrient deficiencies. Here, we developed wheat lines expressing rice NICOTIANAMINE SYNTHASE 2 (OsNAS2) and bean FERRITIN (PvFERRITIN) as single genes as well as in combination. NAS catalyzes the biosynthesis of nicotianamine (NA), which is a precursor of the iron chelator deoxymugeneic acid (DMA) required for long distance iron translocation. FERRITIN is important for iron storage in plants because it can store up to 4500 iron ions. We obtained significant increases of iron and zinc content in wheat grains of plants expressing either OsNAS2 or PvFERRTIN, or both genes. In particular, wheat lines expressing OsNAS2 greatly surpass the HarvestPlus recommended target level of 30 % dietary estimated average requirement (EAR) for iron, and 40 % of EAR for zinc, with lines containing 93.1 µg/g of iron and 140.6 µg/g of zinc in the grains. These wheat lines with dietary significant levels of iron and zinc represent useful germplasm for breeding new wheat varieties that can reduce micronutrient deficiencies in affected populations.
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Affiliation(s)
- Simrat Pal Singh
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Beat Keller
- Institute of Plant Biology, University of Zurich, Zurich, Switzerland
| | - Wilhelm Gruissem
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Navreet K Bhullar
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland.
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Zang X, Geng X, Wang F, Liu Z, Zhang L, Zhao Y, Tian X, Ni Z, Yao Y, Xin M, Hu Z, Sun Q, Peng H. Overexpression of wheat ferritin gene TaFER-5B enhances tolerance to heat stress and other abiotic stresses associated with the ROS scavenging. BMC PLANT BIOLOGY 2017; 17:14. [PMID: 28088182 PMCID: PMC5237568 DOI: 10.1186/s12870-016-0958-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 12/20/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND The yield of wheat (Triticum aestivum L.), an important crop, is adversely affected by heat stress in many regions of the world. However, the molecular mechanisms underlying thermotolerance are largely unknown. RESULTS A novel ferritin gene, TaFER, was identified from our previous heat stress-responsive transcriptome analysis of a heat-tolerant wheat cultivar (TAM107). TaFER was mapped to chromosome 5B and named TaFER-5B. Expression pattern analysis revealed that TaFER-5B was induced by heat, polyethylene glycol (PEG), H2O2 and Fe-ethylenediaminedi(o-hydroxyphenylacetic) acid (Fe-EDDHA). To confirm the function of TaFER-5B in wheat, TaFER-5B was transformed into the wheat cultivar Jimai5265 (JM5265), and the transgenic plants exhibited enhanced thermotolerance. To examine whether the function of ferritin from mono- and dico-species is conserved, TaFER-5B was transformed into Arabidopsis, and overexpression of TaFER-5B functionally complemented the heat stress-sensitive phenotype of a ferritin-lacking mutant of Arabidopsis. Moreover, TaFER-5B is essential for protecting cells against heat stress associated with protecting cells against ROS. In addition, TaFER-5B overexpression also enhanced drought, oxidative and excess iron stress tolerance associated with the ROS scavenging. Finally, TaFER-5B transgenic Arabidopsis and wheat plants exhibited improved leaf iron content. CONCLUSIONS Our results suggest that TaFER-5B plays an important role in enhancing tolerance to heat stress and other abiotic stresses associated with the ROS scavenging.
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Affiliation(s)
- Xinshan Zang
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Xiaoli Geng
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Fei Wang
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Zhenshan Liu
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Liyuan Zhang
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Yue Zhao
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Xuejun Tian
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Zhongfu Ni
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Yingyin Yao
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Mingming Xin
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Zhaorong Hu
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Qixin Sun
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
| | - Huiru Peng
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis and Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Haidian District, Beijing, 100193 China
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Bonneau J, Baumann U, Beasley J, Li Y, Johnson AAT. Identification and molecular characterization of the nicotianamine synthase gene family in bread wheat. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:2228-2239. [PMID: 27155533 PMCID: PMC5103229 DOI: 10.1111/pbi.12577] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/31/2016] [Accepted: 04/28/2016] [Indexed: 05/03/2023]
Abstract
Nicotianamine (NA) is a non-protein amino acid involved in fundamental aspects of metal uptake, transport and homeostasis in all plants and constitutes the biosynthetic precursor of mugineic acid family phytosiderophores (MAs) in graminaceous plant species. Nicotianamine synthase (NAS) genes, which encode enzymes that synthesize NA from S-adenosyl-L-methionine (SAM), are differentially regulated by iron (Fe) status in most plant species and plant genomes have been found to contain anywhere from 1 to 9 NAS genes. This study describes the identification of 21 NAS genes in the hexaploid bread wheat (Triticum aestivum L.) genome and their phylogenetic classification into two distinct clades. The TaNAS genes are highly expressed during germination, seedling growth and reproductive development. Fourteen of the clade I NAS genes were up-regulated in root tissues under conditions of Fe deficiency. Protein sequence analyses revealed the presence of endocytosis motifs in all of the wheat NAS proteins as well as chloroplast, mitochondrial and secretory transit peptide signals in four proteins. These results greatly expand our knowledge of NAS gene families in graminaceous plant species as well as the genetics underlying Fe nutrition in bread wheat.
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Affiliation(s)
- Julien Bonneau
- School of BioSciencesThe University of MelbourneMelbourneVic.Australia
| | - Ute Baumann
- Australian Centre for Plant Functional GenomicsThe University of AdelaideAdelaideSAAustralia
| | - Jesse Beasley
- School of BioSciencesThe University of MelbourneMelbourneVic.Australia
| | - Yuan Li
- Australian Centre for Plant Functional GenomicsThe University of AdelaideAdelaideSAAustralia
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49
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Vasconcelos MW, Gruissem W, Bhullar NK. Iron biofortification in the 21st century: setting realistic targets, overcoming obstacles, and new strategies for healthy nutrition. Curr Opin Biotechnol 2016; 44:8-15. [PMID: 27780080 DOI: 10.1016/j.copbio.2016.10.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/03/2016] [Accepted: 10/04/2016] [Indexed: 12/16/2022]
Abstract
Plant-based foods offer a wide range of nutrients that are essential for human and animal health. Among these nutrients, iron stands out as one of the most important micronutrients. Increasing the iron content in many staple and non-staple plant foods continues to be a goal of many scientists around the world. However, the success of such initiatives has sometimes fallen short of their expected targets. In this review we highlight the most recent and promising results that have contributed to increasing the iron content in different crops. We also discuss methods that to date have been used to reach iron biofortification goals and new strategies that we believe are most promising for crop biofortification in the future. Plant anatomical, physiological and metabolic hurdles still need to be tackled for making progress on further increasing currently reached levels of micronutrient improvements. New strategies need to take into account growing environmental challenges that may constrain biofortification efforts.
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Affiliation(s)
- Marta W Vasconcelos
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobão Vital, Apartado 2511, 4202-401 Porto, Portugal.
| | - Wilhelm Gruissem
- Department of Biology, Plant Biotechnology, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Navreet K Bhullar
- Department of Biology, Plant Biotechnology, ETH Zurich, CH-8092 Zurich, Switzerland.
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50
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O’Neill EC, Kelly S. Engineering biosynthesis of high-value compounds in photosynthetic organisms. Crit Rev Biotechnol 2016; 37:779-802. [DOI: 10.1080/07388551.2016.1237467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Steven Kelly
- Department of Plant Sciences, University of Oxford, Oxford, UK
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