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Sahu A, Verma R, Gupta U, Kashyap S, Sanyal I. An Overview of Targeted Genome Editing Strategies for Reducing the Biosynthesis of Phytic Acid: an Anti-nutrient in Crop Plants. Mol Biotechnol 2024; 66:11-25. [PMID: 37061991 DOI: 10.1007/s12033-023-00722-1] [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: 01/26/2023] [Accepted: 03/11/2023] [Indexed: 04/17/2023]
Abstract
Anti-nutrients are substances either found naturally or are of synthetic origin, which leads to the inactivation of nutrients and limits their utilization in metabolic processes. Phytic acid is classified as an anti-nutrient, as it has a strong binding affinity with most minerals like Fe, Zn, Mg, Ca, Mn, and Cd and impairs their proper metabolism. Removing anti-nutrients from cereal grains may enable the bioavailability of both macro- and micronutrients which is the desired goal of genetic engineering tools for the betterment of agronomic traits. Several strategies have been adopted to minimize phytic acid content in plants. Pursuing the molecular strategies, there are several studies, which result in the decrement of the total phytic acid content in grains of major as well as minor crops. Biosynthesis of phytic acid mainly takes place in the seed comprising lipid-dependent and lipid-independent pathways, involving various enzymes. Furthermore, some studies show that interruption of these enzymes may involve the pleiotropic effect. However, using modern biotechnological approaches, undesirable agronomic traits can be removed. This review presents an overview of different genes encoding the various enzymes involved in the biosynthetic pathway of phytic acid which is being targeted for its reduction. It also, highlights and enumerates the variety of potential applications of genome editing tools such as TALEN, ZFN, and CRISPR/Cas9 to knock out the desired genes, and RNAi for their silencing.
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Affiliation(s)
- Anshu Sahu
- Plant Transgenic Laboratory, Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P, 226001, India
| | - Rita Verma
- Plant Transgenic Laboratory, Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P, 226001, India
| | - Uma Gupta
- Plant Transgenic Laboratory, Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P, 226001, India
| | - Shashi Kashyap
- Plant Transgenic Laboratory, Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P, 226001, India
| | - Indraneel Sanyal
- Plant Transgenic Laboratory, Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, U.P, 226001, India.
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Pullagurla NJ, Shome S, Yadav R, Laha D. ITPK1 Regulates Jasmonate-Controlled Root Development in Arabidopsis thaliana. Biomolecules 2023; 13:1368. [PMID: 37759768 PMCID: PMC10526342 DOI: 10.3390/biom13091368] [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: 07/01/2023] [Revised: 08/26/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Jasmonic acid (JA) is a plant hormone that regulates a plethora of physiological processes including immunity and development and is perceived by the F-Box protein, Coronatine-insensitive protein 1 (COI1). The discovery of inositol phosphates (InsPs) in the COI1 receptor complex highlights their role in JAperception. InsPs are phosphate-rich signaling molecules that control many aspects of plant physiology. Inositol pyrophosphates (PP-InsPs) are diphosphate containing InsP species, of which InsP7 and InsP8 are the best characterized ones. Different InsP and PP-InsP species are linked with JA-related plant immunity. However, role of PP-InsP species in regulating JA-dependent developmental processes are poorly understood. Recent identification of ITPK1 kinase, responsible for the production of 5-InsP7 from InsP6in planta, provides a platform to investigate the possible involvement of ITPK-derived InsP species in JA-related plant development. Here, in this study, we report that ITPK1-defective plants exhibit increased root growth inhibition to bioactive JA treatment. The itpk1 plants also show increased lateral root density when treated with JA. Notably, JA treatment does not increase ITPK1 protein levels. Gene expression analyses revealed that JA-biosynthetic genes are not differentially expressed in ITPK1-deficient plants. We further demonstrate that genes encoding different JAZ repressor proteins are severely down-regulated in ITPK1-defective plants. Taken together, our study highlights the role of ITPK1 in regulating JA-dependent root architecture development through controlling the expression of different JAZ repressor proteins.
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Affiliation(s)
| | | | | | - Debabrata Laha
- Department of Biochemistry, Division of Biological Sciences, Indian Institute of Science (IISc), Bengaluru 560012, India; (N.J.P.); (S.S.); (R.Y.)
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Ito M, Fujii N, Kohara S, Hori S, Tanaka M, Wittwer C, Kikuchi K, Iijima T, Kakimoto Y, Hirabayashi K, Kurotaki D, Jessen HJ, Saiardi A, Nagata E. Inositol pyrophosphate profiling reveals regulatory roles of IP6K2-dependent enhanced IP 7 metabolism in the enteric nervous system. J Biol Chem 2023; 299:102928. [PMID: 36681123 PMCID: PMC9957762 DOI: 10.1016/j.jbc.2023.102928] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 01/20/2023] Open
Abstract
Inositol pyrophosphates regulate diverse physiological processes; to better understand their functional roles, assessing their tissue-specific distribution is important. Here, we profiled inositol pyrophosphate levels in mammalian organs using an originally designed liquid chromatography-mass spectrometry (LC-MS) protocol and discovered that the gastrointestinal tract (GIT) contained the highest levels of diphosphoinositol pentakisphosphate (IP7) and its precursor inositol hexakisphosphate (IP6). Although their absolute levels in the GIT are diet dependent, elevated IP7 metabolism still exists under dietary regimens devoid of exogenous IP7. Of the major GIT cells, enteric neurons selectively express the IP7-synthesizing enzyme IP6K2. We found that IP6K2-knockout mice exhibited significantly impaired IP7 metabolism in the various organs including the proximal GIT. In addition, our LC-MS analysis displayed that genetic ablation of IP6K2 significantly impaired IP7 metabolism in the gut and duodenal muscularis externa containing myenteric plexus. Whole transcriptome analysis of duodenal muscularis externa further suggested that IP6K2 inhibition significantly altered expression levels of the gene sets associated with mature neurons, neural progenitor/stem cells, and glial cells, as well as of certain genes modulating neuronal differentiation and functioning, implying critical roles of the IP6K2-IP7 axis in developmental and functional regulation of the enteric nervous system. These results collectively reveal an unexpected role of mammalian IP7-a highly active IP6K2-IP7 pathway is conducive to the enteric nervous system.
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Affiliation(s)
- Masatoshi Ito
- Support Center for Medical Research and Education, Tokai University, Isehara, Japan.
| | - Natsuko Fujii
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan
| | - Saori Kohara
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan
| | - Shuho Hori
- Support Center for Medical Research and Education, Tokai University, Isehara, Japan
| | - Masayuki Tanaka
- Support Center for Medical Research and Education, Tokai University, Isehara, Japan
| | | | - Kenta Kikuchi
- Laboratory of Chromatin Organization in Immune Cell Development, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takatoshi Iijima
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Japan
| | - Yu Kakimoto
- Department of Forensic Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Kenichi Hirabayashi
- Department of Pathology, Tokai University School of Medicine, Isehara, Japan
| | - Daisuke Kurotaki
- Laboratory of Chromatin Organization in Immune Cell Development, International Research Center for Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Henning J Jessen
- Institute of Organic Chemistry, University of Freiburg, Freiburg, Germany
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology, University College London, London, United Kingdom
| | - Eiichiro Nagata
- Department of Neurology, Tokai University School of Medicine, Isehara, Japan.
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Meng G, Rasmussen SK, Christensen CSL, Fan W, Torp AM. Molecular breeding of barley for quality traits and resilience to climate change. Front Genet 2023; 13:1039996. [PMID: 36685930 PMCID: PMC9851277 DOI: 10.3389/fgene.2022.1039996] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 12/19/2022] [Indexed: 01/06/2023] Open
Abstract
Barley grains are a rich source of compounds, such as resistant starch, beta-glucans and anthocyanins, that can be explored in order to develop various products to support human health, while lignocellulose in straw can be optimised for feed in husbandry, bioconversion into bioethanol or as a starting material for new compounds. Existing natural variations of these compounds can be used to breed improved cultivars or integrated with a large number of mutant lines. The technical demands can be in opposition depending on barley's end use as feed or food or as a source of biofuel. For example beta-glucans are beneficial in human diets but can lead to issues in brewing and poultry feed. Barley breeders have taken action to integrate new technologies, such as induced mutations, transgenics, marker-assisted selection, genomic selection, site-directed mutagenesis and lastly machine learning, in order to improve quality traits. Although only a limited number of cultivars with new quality traits have so far reached the market, research has provided valuable knowledge and inspiration for future design and a combination of methodologies to achieve the desired traits. The changes in climate is expected to affect the quality of the harvested grain and it is already a challenge to mitigate the unpredictable seasonal and annual variations in temperature and precipitation under elevated [CO2] by breeding. This paper presents the mutants and encoded proteins, with a particular focus on anthocyanins and lignocellulose, that have been identified and characterised in detail and can provide inspiration for continued breeding to achieve desired grain and straw qualities.
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Affiliation(s)
- Geng Meng
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark,College of Horticulture, Henan Agricultural University, Zhengzhou, China
| | - Søren K. Rasmussen
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark,*Correspondence: Søren K. Rasmussen,
| | | | - Weiyao Fan
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Anna Maria Torp
- Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
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Laha NP, Giehl RFH, Riemer E, Qiu D, Pullagurla NJ, Schneider R, Dhir YW, Yadav R, Mihiret YE, Gaugler P, Gaugler V, Mao H, Zheng N, von Wirén N, Saiardi A, Bhattacharjee S, Jessen HJ, Laha D, Schaaf G. INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1-dependent inositol polyphosphates regulate auxin responses in Arabidopsis. PLANT PHYSIOLOGY 2022; 190:2722-2738. [PMID: 36124979 PMCID: PMC9706486 DOI: 10.1093/plphys/kiac425] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
The combinatorial phosphorylation of myo-inositol results in the generation of different inositol phosphates (InsPs), of which phytic acid (InsP6) is the most abundant species in eukaryotes. InsP6 is also an important precursor of the higher phosphorylated inositol pyrophosphates (PP-InsPs), such as InsP7 and InsP8, which are characterized by a diphosphate moiety and are also ubiquitously found in eukaryotic cells. While PP-InsPs regulate various cellular processes in animals and yeast, their biosynthesis and functions in plants has remained largely elusive because plant genomes do not encode canonical InsP6 kinases. Recent work has shown that Arabidopsis (Arabidopsis thaliana) INOSITOL (1,3,4) TRIPHOSPHATE 5/6 KINASE1 (ITPK1) and ITPK2 display in vitro InsP6 kinase activity and that, in planta, ITPK1 stimulates 5-InsP7 and InsP8 synthesis and regulates phosphate starvation responses. Here we report a critical role of ITPK1 in auxin-related processes that is independent of the ITPK1-controlled regulation of phosphate starvation responses. Those processes include primary root elongation, root hair development, leaf venation, thermomorphogenic and gravitropic responses, and sensitivity to exogenously applied auxin. We found that the recombinant auxin receptor complex, consisting of the F-Box protein TRANSPORT INHIBITOR RESPONSE1 (TIR1), ARABIDOPSIS SKP1 HOMOLOG 1 (ASK1), and the transcriptional repressor INDOLE-3-ACETIC ACID INDUCIBLE 7 (IAA7), binds to anionic inositol polyphosphates with high affinity. We further identified a physical interaction between ITPK1 and TIR1, suggesting a localized production of 5-InsP7, or another ITPK1-dependent InsP/PP-InsP isomer, to activate the auxin receptor complex. Finally, we demonstrate that ITPK1 and ITPK2 function redundantly to control auxin responses, as deduced from the auxin-insensitive phenotypes of itpk1 itpk2 double mutant plants. Our findings expand the mechanistic understanding of auxin perception and suggest that distinct inositol polyphosphates generated near auxin receptors help to fine-tune auxin sensitivity in plants.
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Affiliation(s)
| | - Ricardo F H Giehl
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, Gatersleben 06466, Germany
| | - Esther Riemer
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Danye Qiu
- Department of Chemistry and Pharmacy & CIBSS–The Center for Biological Signalling Studies, University of Freiburg, Freiburg 79104, Germany
| | - Naga Jyothi Pullagurla
- Department of Biochemistry, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Robin Schneider
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | | | - Ranjana Yadav
- Department of Biochemistry, Indian Institute of Science, Bengaluru 560012, Karnataka, India
| | - Yeshambel Emewodih Mihiret
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Philipp Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Verena Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn 53115, Germany
| | - Haibin Mao
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA
| | - Ning Zheng
- Department of Pharmacology, Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, USA
| | - Nicolaus von Wirén
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, Gatersleben 06466, Germany
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology (MRC-LMCB), University College London, London WC1E 6BT, UK
| | - Saikat Bhattacharjee
- Laboratory of Signal Transduction and Plant Resistance, Regional Centre for Biotechnology, NCR-Biotech Science Cluster, Faridabad 121001, Haryana, India
| | - Henning J Jessen
- Department of Chemistry and Pharmacy & CIBSS–The Center for Biological Signalling Studies, University of Freiburg, Freiburg 79104, Germany
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Tp MA, Kumar A, Anilkumar C, Sah RP, Behera S, Marndi BC. Understanding natural genetic variation for grain phytic acid content and functional marker development for phytic acid-related genes in rice. BMC PLANT BIOLOGY 2022; 22:446. [PMID: 36114452 PMCID: PMC9482188 DOI: 10.1186/s12870-022-03831-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND The nutritional value of rice can be improved by developing varieties with optimum levels of grain phytic acid (PA). Artificial low-PA mutants with impaired PA biosynthesis have been developed in rice through induced mutagenesis. However, low-PA mutant stocks with drastically reduced grain PA content have poor breeding potential, and their use in rice breeding is restricted due to their detrimental pleiotropic effects, which include decreased seed viability, low grain weight, and low seed yield. Therefore, it is necessary to take advantage of the natural variation in grain PA content in order to reduce the PA content to an ideal level without compromising the crop's agronomic performance. Natural genetic diversity in grain PA content has not been thoroughly examined among elite genetic stocks. Additionally, given grain PA content as a quantitative trait driven by polygenes, DNA marker-assisted selection may be required for manipulation of such a trait; however, informative DNA markers for PA content have not yet been identified in rice. Here we investigated and dissected natural genetic variation and genetic variability components for grain PA content in rice varieties cultivated in Eastern and North-Eastern India during the last 50 years. We developed novel gene-based markers for the low-PA-related candidate genes in rice germplasm, and their allelic diversity and association with natural variation in grain PA content were studied. RESULTS A wide (0.3-2.8%), significant variation for grain PA content, with decade-wise and ecology-wise differences, was observed among rice varieties. Significant genotype x environment interaction suggested polygenic inheritance. The novel candidate gene-based markers detected 43 alleles in the rice varieties. The new markers were found highly informative as indicated by PIC values (0.11-0.65; average: 0.34) and coverage of total diversity. Marker alleles developed from two putative transporter genes viz., SPDT and OsPT8 were significantly associated with grain PA variation assayed on the panel. A 201 bp allele at the 3' UTR of SPDT gene was negatively associated with grain PA content and explained 7.84% of the phenotypic variation. A rare allele in the coding sequence of OsPT8 gene was positively associated with grain PA content which explained phenotypic variation of 18.49%. CONCLUSION Natural variation in grain PA content is substantial and is mostly controlled by genetic factors. The unique DNA markers linked with PA content have significant potential as genomic resources for the development of low-PA rice varieties through genomics-assisted breeding procedures.
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Affiliation(s)
| | - Awadhesh Kumar
- Crop Physiology and Biochemistry Division, ICAR-National Rice Research Institute, Cuttack, India
| | - Chandrappa Anilkumar
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, India
| | - Rameswar Prasad Sah
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, India.
| | - Sasmita Behera
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, India
| | - Bishnu Charan Marndi
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, India
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geng L, Li M, Zhang G, Ye L. Barley: a potential cereal for producing healthy and functional foods. FOOD QUALITY AND SAFETY 2022. [DOI: 10.1093/fqsafe/fyac012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Barley is the fourth largest cereal crop in the world. It is mainly used for feeding, beer production and food. Barley is receiving more attention from both agricultural and food scientists because of its special chemical composition and health benefits. In comparison with other cereal crops, including wheat, rice and maize, barley grains are rich in dietary fiber (such as β-glucan) and tocols, which are beneficial to human health. It is well proved that diets rich in those chemicals can provide protection against hypertension, cardiovascular disease, and diabetes. Barley has been widely recognized to be great potential as a healthy or functional food. In this review, we present the information about the studies on physical structure of barley grain and the distribution of main chemical components, nutrient and functional composition of barley grain and their health benefits, and the approaches of improving and utilizing the nutrient and functional chemicals in barley grain. With the development of processing technologies, functional components in barley grains, especially β-glucan, can be efficiently extracted and concentrated. Moreover, nutrient and functional components in barley grains can be efficiently improved by precise breeding and agronomic approaches. The review highlights the great potential of barley used as healthy and functional foods, and may be instructive for better utilization of barley in food processing.
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Affiliation(s)
- La geng
- Agronomy Department, Zhejiang University, Hangzhou 310058, China
| | - Mengdi Li
- Agronomy Department, Zhejiang University, Hangzhou 310058, China
| | - Guoping Zhang
- Agronomy Department, Zhejiang University, Hangzhou 310058, China
| | - Lingzhen Ye
- Agronomy Department, Zhejiang University, Hangzhou 310058, China
- Zhejiang University Zhongyuan Institute, Zhengzhou 450000, China
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Shukla A, Kaur M, Kanwar S, Kaur G, Sharma S, Ganguli S, Kumari V, Mazumder K, Pandey P, Rouached H, Rishi V, Bhandari R, Pandey AK. Wheat inositol pyrophosphate kinase TaVIH2-3B modulates cell-wall composition and drought tolerance in Arabidopsis. BMC Biol 2021; 19:261. [PMID: 34895221 PMCID: PMC8665518 DOI: 10.1186/s12915-021-01198-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 11/22/2021] [Indexed: 02/08/2023] Open
Abstract
Background Inositol pyrophosphates (PP-InsPs) are high-energy derivatives of inositol, involved in different signalling and regulatory responses of eukaryotic cells. Distinct PP-InsPs species are characterized by the presence of phosphate at a variable number of the 6-carbon inositol ring backbone, and two distinct classes of inositol phosphate kinases responsible for their synthesis have been identified in Arabidopsis, namely ITPKinase (inositol 1,3,4 trisphosphate 5/6 kinase) and PP-IP5Kinase (diphosphoinositol pentakisphosphate kinases). Plant PP-IP5Ks are capable of synthesizing InsP8 and were previously shown to control defense against pathogens and phosphate response signals. However, other potential roles of plant PP-IP5Ks, especially towards abiotic stress, remain poorly understood. Results Here, we characterized the physiological functions of two Triticum aestivum L. (hexaploid wheat) PPIP5K homologs, TaVIH1 and TaVIH2. We demonstrate that wheat VIH proteins can utilize InsP7 as the substrate to produce InsP8, a process that requires the functional VIH-kinase domains. At the transcriptional level, both TaVIH1 and TaVIH2 are expressed in different wheat tissues, including developing grains, but show selective response to abiotic stresses during drought-mimic experiments. Ectopic overexpression of TaVIH2-3B in Arabidopsis confers tolerance to drought stress and rescues the sensitivity of Atvih2 mutants. RNAseq analysis of TaVIH2-3B-expressing transgenic lines of Arabidopsis shows genome-wide reprogramming with remarkable effects on genes involved in cell-wall biosynthesis, which is supported by the observation of enhanced accumulation of polysaccharides (arabinogalactan, cellulose, and arabinoxylan) in the transgenic plants. Conclusions Overall, this work identifies a novel function of VIH proteins, implicating them in modulation of the expression of cell-wall homeostasis genes, and tolerance to water-deficit stress. This work suggests that plant VIH enzymes may be linked to drought tolerance and opens up the possibility of future research into using plant VIH-derived products to generate drought-resistant plants. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01198-8.
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Affiliation(s)
- Anuj Shukla
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India.,Regional Centre for Biotechnology, Faridabad - 121001 Haryana (NCR), Delhi, India
| | - Mandeep Kaur
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Swati Kanwar
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Gazaldeep Kaur
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Shivani Sharma
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Shubhra Ganguli
- Laboratory of Cell Signalling, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, 500039, India.,Graduate Studies, Manipal Academy of Higher Education, Manipal, 576104, India
| | - Vandana Kumari
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Koushik Mazumder
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Pratima Pandey
- Department of Biological Sciences, Indian Institute of Education and Research, Mohali, 140306, India
| | - Hatem Rouached
- Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI, 48824, USA.,Plant Resilience Institute, Michigan State University, East Lansing, MI, 48824, USA
| | - Vikas Rishi
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India
| | - Rashna Bhandari
- Laboratory of Cell Signalling, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, 500039, India
| | - Ajay Kumar Pandey
- National Agri-Food Biotechnology Institute (Department of Biotechnology), Sector 81, Knowledge City, S.A.S. Nagar, Mohali-140306, Punjab, India.
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Aiqing Z, Zhang L, Ning P, Chen Q, Wang B, Zhang F, Yang X, Zhang Y. Zinc in cereal grains: Concentration, distribution, speciation, bioavailability, and barriers to transport from roots to grains in wheat. Crit Rev Food Sci Nutr 2021; 62:7917-7928. [PMID: 34224281 DOI: 10.1080/10408398.2021.1920883] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Zinc (Zn) is an essential micro-nutrient for humans, and Zn deficiency is of global concern. In addition to inherited and pathological Zn deficiencies, insufficient dietary intake is leading cause, especially in those consuming cereal grains as a stable food, in which Zn concentration and bioavailability are relatively low. To improve Zn levels in the human body, it is important to understand the accumulation and bioavailability of Zn in cereal grains. In recent years, knowledge on the molecular mechanisms underlying Zn uptake, transport, homeostasis, and deposition within cereal crops has been accumulating, paving the way for a more targeted approach to improving the nutrient status of crop plants. In this paper, we briefly review existing studies on the distribution and transport pathways of Zn in major small-grained cereals, using wheat as a case study. The findings confirm that Zn transport in plants is a complex physiological process mainly governed by Zn transporters and metal chelators. This work reviews studies on Zn uptake, transport, and deposition in wheat plants, summarizes the possible barriers impairing Zn deposition in wheat grains, and describes strategies for increasing Zn concentration in wheat grains.
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Affiliation(s)
- Zhao Aiqing
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Liansheng Zhang
- National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Peng Ning
- National Academy of Agriculture Green Development, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions (Ministry of Education), China Agricultural University, Beijing, China
| | - Qin Chen
- Northwest Land and Resources Research Center, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Bini Wang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Fuxin Zhang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Xingbin Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi Province, China
| | - Youlin Zhang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi Province, China
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Silva VM, Putti FF, White PJ, Reis ARD. Phytic acid accumulation in plants: Biosynthesis pathway regulation and role in human diet. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 164:132-146. [PMID: 33991859 DOI: 10.1016/j.plaphy.2021.04.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
Phytate or phytic acid (PA), is a phosphorus (P) containing compound generated by the stepwise phosphorylation of myo-inositol. It forms complexes with some nutrient cations, such as Ca, Fe and Zn, compromising their absorption and thus acting as an anti-nutrient in the digestive tract of humans and monogastric animals. Conversely, PAs are an important form of P storage in seeds, making up to 90% of total seed P. Phytates also play a role in germination and are related to the synthesis of abscisic acid and gibberellins, the hormones involved in seed germination. Decreasing PA content in plants is desirable for human dietary. Therefore, low phytic acid (lpa) mutants might present some negative pleiotropic effects, which could impair germination and seed viability. In the present study, we review current knowledge of the genes encoding enzymes that function in different stages of PA synthesis, from the first phosphorylation of myo-inositol to PA transport into seed reserve tissues, and the application of this knowledge to reduce PA concentrations in edible crops to enhance human diet. Finally, phylogenetic data for PA concentrations in different plant families and distributed across several countries under different environmental conditions are compiled. The results of the present study help explain the importance of PA accumulation in different plant families and the distribution of PA accumulation in different foods.
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Affiliation(s)
| | | | - Philip J White
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, UK
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11
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Kumar A, Nayak S, Ngangkham U, Sah RP, Lal MK, Tp A, Behera S, Swain P, Behera L, Sharma S. A single nucleotide substitution in the SPDT transporter gene reduced phytic acid and increased mineral bioavailability from Rice grain (Oryza sativa L.). J Food Biochem 2021; 45:e13822. [PMID: 34121203 DOI: 10.1111/jfbc.13822] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/21/2021] [Accepted: 05/29/2021] [Indexed: 11/26/2022]
Abstract
Phosphorus (P) flow in agricultural land depends on the P taken off from harvested product, its losses through runoff and fertilizer applied to balance the removed P. Phytic acid (PA), the major storage form of phosphorus (P) in cereal grains is a key anti-nutrient for human and non-ruminants leads to eutrophication of waterways. As the natural non-renewable P reserves are limited, enhancing P use efficiency is needed for field crops. SULTR-like phosphorus distribution transporter (SPDT) is a novel rice transporter transfer P to the grain. Any alteration in transporter gene reduce grain P with concomitant rise in the leaves. A low PA (3.0 g/kg) rice Khira was identified where a single nucleotide mutation in LOC_Os06g05160 gene encoding SPDT showed low P transportation to grain. An amino acid change was detected as Valine-330 to Alanine at the 3' end of fifth exon. Highest expression of SPDT was observed in node I of rice as compared to low PA genotype. The mutation in SPDT could significantly affect P and PA accumulation in the grains with increased mineral bioavailability. PRACTICAL APPLICATIONS: Excessive P application in crop leads to higher production cost as well as rapid depletion of limited rock phosphate. Alteration of P transporter function in the rice lower PA and total P accumulation in the grains with increased mineral bioavailability. The re-distributed P in the straw can be applied as manure to the rice field. Thus, less P will be removed from the field, result in the decreased requirement for P fertilizer.
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Affiliation(s)
- Awadhesh Kumar
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Sarangadhar Nayak
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Umakanta Ngangkham
- ICAR-Research Complex for NEH Region, Manipur Centre, Imphal, Manipur, India
| | - Rameswar Prasad Sah
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Milan Kumar Lal
- Division of Crop Physiology, Biochemistry and Post-Harvest Technology, ICAR-Central Potato Research Institute (ICAR-CPRI), Shimla, Himachal Pradesh, India
| | - Azharudheen Tp
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Sasmita Behera
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Padmini Swain
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Lambodar Behera
- Division of Crop Physiology and Biochemistry, ICAR- National Rice Research Institute (ICAR-NRRI), Cuttack, Odisha, India
| | - Srigopal Sharma
- Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
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12
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An ATP-responsive metabolic cassette comprised of inositol tris/tetrakisphosphate kinase 1 (ITPK1) and inositol pentakisphosphate 2-kinase (IPK1) buffers diphosphosphoinositol phosphate levels. Biochem J 2021; 477:2621-2638. [PMID: 32706850 PMCID: PMC7115839 DOI: 10.1042/bcj20200423] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/29/2020] [Accepted: 07/06/2020] [Indexed: 12/27/2022]
Abstract
Inositol polyphosphates are ubiquitous molecular signals in metazoans, as are their pyrophosphorylated derivatives that bear a so-called ‘high-energy’ phosphoanhydride bond. A structural rationale is provided for the ability of Arabidopsis inositol tris/tetrakisphosphate kinase 1 to discriminate between symmetric and enantiomeric substrates in the production of diverse symmetric and asymmetric myo-inositol phosphate and diphospho-myo-inositol phosphate (inositol pyrophosphate) products. Simple tools are applied to chromatographic resolution and detection of known and novel diphosphoinositol phosphates without resort to radiolabeling approaches. It is shown that inositol tris/tetrakisphosphate kinase 1 and inositol pentakisphosphate 2-kinase comprise a reversible metabolic cassette converting Ins(3,4,5,6)P4 into 5-InsP7 and back in a nucleotide-dependent manner. Thus, inositol tris/tetrakisphosphate kinase 1 is a nexus of bioenergetics status and inositol polyphosphate/diphosphoinositol phosphate metabolism. As such, it commands a role in plants that evolution has assigned to a different class of enzyme in mammalian cells. The findings and the methods described will enable a full appraisal of the role of diphosphoinositol phosphates in plants and particularly the relative contribution of reversible inositol phosphate hydroxykinase and inositol phosphate phosphokinase activities to plant physiology.
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13
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Laha D, Kamleitner M, Johnen P, Schaaf G. Analyses of Inositol Phosphates and Phosphoinositides by Strong Anion Exchange (SAX)-HPLC. Methods Mol Biol 2021; 2295:365-378. [PMID: 34047987 DOI: 10.1007/978-1-0716-1362-7_20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
The phosphate esters of myo-inositol (Ins) occur ubiquitously in biology. These molecules exist as soluble or membrane-resident derivatives and regulate a plethora of cellular functions including phosphate homeostasis, DNA repair, vesicle trafficking, metabolism, cell polarity, tip-directed growth, and membrane morphogenesis. Phosphorylation of all inositol hydroxyl groups generates phytic acid (InsP6), the most abundant inositol phosphate present in eukaryotic cells. However, phytic acid is not the most highly phosphorylated naturally occurring inositol phosphate. Specialized small molecule kinases catalyze the formation of the so-called myo-inositol pyrophosphates (PP-InsPs), such as InsP7 and InsP8. These molecules are characterized by one or several "high-energy" diphosphate moieties and are ubiquitous in eukaryotic cells. In plants, PP-InsPs play critical roles in immune responses and nutrient sensing. The detection of inositol derivatives in plants is challenging. This is particularly the case for inositol pyrophosphates because diphospho bonds are labile in plant cell extracts due to high amounts of acid phosphatase activity. We present two steady-state inositol labeling-based techniques coupled with strong anion exchange (SAX)-HPLC analyses that allow robust detection and quantification of soluble and membrane-resident inositol polyphosphates in plant extracts. These techniques will be instrumental to uncover the cellular and physiological processes controlled by these intriguing regulatory molecules in plants.
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Affiliation(s)
- Debabrata Laha
- Department of Biochemistry, Indian Institute of Science, Bangalore, India
| | - Marília Kamleitner
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-University Bonn, Bonn, Germany
| | - Philipp Johnen
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-University Bonn, Bonn, Germany.,BASF SE, Limburgerhof, Germany
| | - Gabriel Schaaf
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-University Bonn, Bonn, Germany.
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14
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Rix GD, Todd JD, Neal AL, Brearley CA. Improved sensitivity, accuracy and prediction provided by a high-performance liquid chromatography screen for the isolation of phytase-harbouring organisms from environmental samples. Microb Biotechnol 2020; 14:1409-1421. [PMID: 33347708 PMCID: PMC8313252 DOI: 10.1111/1751-7915.13733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/22/2020] [Accepted: 11/28/2020] [Indexed: 11/30/2022] Open
Abstract
HPLC methods are shown to be of predictive value for classification of phytase activity of aggregate microbial communities and pure cultures. Applied in initial screens, they obviate the problems of ‘false‐positive’ detection arising from impurity of substrate and imprecision of methodologies that rely on phytate‐specific media. In doing so, they simplify selection of candidates for biotechnological applications. Combined with 16S sequencing and simple bioinformatics, they reveal diversity of the histidine phosphatase class of phytases most commonly exploited for biotechnological use. They reveal contribution of multiple inositol‐polyphosphate phosphatase (MINPP) activity to aggregate soil phytase activity, and they identity Acinetobacter spp. as harbouring this prevalent soil phytase activity. Previously, among bacteria MINPP was described exclusively as an activity of gut commensals. HPLC methods have also identified, in a facile manner, a known commercially successful histidine (acid) phosphatase enzyme. The methods described afford opportunity for isolation of phytases for biotechnological use from other environments. They reveal the position of attack on phytate by diverse histidine phosphatases, something that other methods lack.
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Affiliation(s)
- Gregory D Rix
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norfolk, NR4 7TJ, UK
| | - Jonathan D Todd
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norfolk, NR4 7TJ, UK
| | - Andrew L Neal
- Department of Sustainable Agriculture Science, Rothamsted Research, Devon, EX20 2SB, UK
| | - Charles A Brearley
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norfolk, NR4 7TJ, UK
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15
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Abstract
The specific non-invasive control of intracellular signaling events requires advanced tools that enter cells by diffusion and are controllable by light. Here, we detail the synthesis and application of membrane-permeant caged inositol pyrophosphates with respect to cell entry and cell distribution. We recently published the synthesis of these tools as well as their effect on PH-domain localization in HeLa cells and oscillations of the intracellular calcium concentration in β-cells, which are known to drive insulin secretion. In this chapter, we discuss the possibilities and limitations when using cell-penetrating inositol pyrophosphates. We provide a detailed protocol for the application in live mouse β-cells and we discuss the image analysis needed for following effects on calcium signaling.
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Raboy V, Gibson RS, Bailey KB, King JC. Comparison of four methods for phytate analysis in plant-based foods. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103481] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Fukushima A, Perera I, Hosoya K, Akabane T, Hirotsu N. Genotypic Differences in the Effect of P Fertilization on Phytic Acid Content in Rice Grain. PLANTS 2020; 9:plants9020146. [PMID: 31979223 PMCID: PMC7076419 DOI: 10.3390/plants9020146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 11/25/2022]
Abstract
Phytic acid (PA) prevents the absorption of minerals in the human intestine, and it is regarded as an antinutrient. Low PA rice is beneficial because of its higher Zn bioavailability and it is suggested that the gene expression level of myo-inositol 3-phosphate synthase 1 (INO1) in developing grain is a key factor to explain the genotypic difference in PA accumulation among natural variants of rice. P fertilization is also considered to affect the PA content, but it is not clear how it affects INO1 gene expression and the PA content in different genotypes. Here, we investigated the effect of P fertilization on the PA content in two contrasting rice genotypes, with low and high PA accumulation, respectively. Based on the results of the analysis of the PA content, inorganic P content, INO1 gene expression, and xylem sap inorganic P content, we concluded that the effect of P fertilization on PA accumulation in grain differed with the genotype, and it was regulated by multiple mechanisms.
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Affiliation(s)
- Ayaka Fukushima
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0193, Japan;
| | - Ishara Perera
- Grain Legumes and Oil Crops Research and Development Centre, Department of Agriculture, Angunakolapelessa 82220, Sri Lanka;
| | - Koki Hosoya
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0193, Japan; (K.H.); (T.A.)
| | - Tatsuki Akabane
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0193, Japan; (K.H.); (T.A.)
| | - Naoki Hirotsu
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0193, Japan;
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma 374-0193, Japan; (K.H.); (T.A.)
- Correspondence: ; Tel.: +81-276-82-9027
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18
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Low phytic acid Crops: Observations Based On Four Decades of Research. PLANTS 2020; 9:plants9020140. [PMID: 31979164 PMCID: PMC7076677 DOI: 10.3390/plants9020140] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/16/2020] [Accepted: 01/17/2020] [Indexed: 02/06/2023]
Abstract
The low phytic acid (lpa), or "low-phytate" seed trait can provide numerous potential benefits to the nutritional quality of foods and feeds and to the sustainability of agricultural production. Major benefits include enhanced phosphorus (P) management contributing to enhanced sustainability in non-ruminant (poultry, swine, and fish) production; reduced environmental impact due to reduced waste P in non-ruminant production; enhanced "global" bioavailability of minerals (iron, zinc, calcium, magnesium) for both humans and non-ruminant animals; enhancement of animal health, productivity and the quality of animal products; development of "low seed total P" crops which also can enhance management of P in agricultural production and contribute to its sustainability. Evaluations of this trait by industry and by advocates of biofortification via breeding for enhanced mineral density have been too short term and too narrowly focused. Arguments against breeding for the low-phytate trait overstate the negatives such as potentially reduced yields and field performance or possible reductions in phytic acid's health benefits. Progress in breeding or genetically-engineering high-yielding stress-tolerant low-phytate crops continues. Perhaps due to the potential benefits of the low-phytate trait, the challenge of developing high-yielding, stress-tolerant low-phytate crops has become something of a holy grail for crop genetic engineering. While there are widely available and efficacious alternative approaches to deal with the problems posed by seed-derived dietary phytic acid, such as use of the enzyme phytase as a feed additive, or biofortification breeding, if there were an interest in developing low-phytate crops with good field performance and good seed quality, it could be accomplished given adequate time and support. Even with a moderate reduction in yield, in light of the numerous benefits of low-phytate types as human foods or animal feeds, should one not grow a nutritionally-enhanced crop variant that perhaps has 5% to 10% less yield than a standard variant but one that is substantially more nutritious? Such crops would be a benefit to human nutrition especially in populations at risk for iron and zinc deficiency, and a benefit to the sustainability of agricultural production.
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Cominelli E, Pilu R, Sparvoli F. Phytic Acid and Transporters: What Can We Learn from low phytic acid Mutants. PLANTS 2020; 9:plants9010069. [PMID: 31948109 PMCID: PMC7020491 DOI: 10.3390/plants9010069] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/23/2019] [Accepted: 01/01/2020] [Indexed: 01/22/2023]
Abstract
Phytic acid has two main roles in plant tissues: Storage of phosphorus and regulation of different cellular processes. From a nutritional point of view, it is considered an antinutritional compound because, being a cation chelator, its presence reduces mineral bioavailability from the diet. In recent decades, the development of low phytic acid (lpa) mutants has been an important goal for nutritional seed quality improvement, mainly in cereals and legumes. Different lpa mutations affect phytic acid biosynthetic genes. However, other lpa mutations isolated so far, affect genes coding for three classes of transporters: A specific group of ABCC type vacuolar transporters, putative sulfate transporters, and phosphate transporters. In the present review, we summarize advances in the characterization of these transporters in cereals and legumes. Particularly, we describe genes, proteins, and mutants for these different transporters, and we report data of in silico analysis aimed at identifying the putative orthologs in some other cereal and legume species. Finally, we comment on the advantage of using such types of mutants for crop biofortification and on their possible utility to unravel links between phosphorus and sulfur metabolism (phosphate and sulfate homeostasis crosstalk).
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Affiliation(s)
- Eleonora Cominelli
- Institute of Agricultural Biology and Biotechnology, Consiglio Nazionale delle Ricerche, Via E. Bassini 15, 20133 Milan, Italy;
- Correspondence: ; Tel.: +39-022-369-9421
| | - Roberto Pilu
- Department of Agricultural and Environmental Sciences—Production Landscape, Agroenergy Università degli Studi di Milano, Via G. Celoria 2, 20133 Milan, Italy;
| | - Francesca Sparvoli
- Institute of Agricultural Biology and Biotechnology, Consiglio Nazionale delle Ricerche, Via E. Bassini 15, 20133 Milan, Italy;
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Sashidhar N, Harloff HJ, Jung C. Knockout of MULTI-DRUG RESISTANT PROTEIN 5 Genes Lead to Low Phytic Acid Contents in Oilseed Rape. FRONTIERS IN PLANT SCIENCE 2020; 11:603. [PMID: 32528494 PMCID: PMC7264376 DOI: 10.3389/fpls.2020.00603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/21/2020] [Indexed: 05/08/2023]
Abstract
Understanding phosphate uptake and storage is interesting to optimize the plant performance to phosphorus fluctuations. Phytic acid (PA) is the major source of inorganic phosphorus (Pi) in plants. Genetic analyses of PA pathway transporter genes (BnMRP5) and their functional characterization might provide clues in better utilizing the available phosphate resources. Furthermore, the failure to assimilate PA by monogastric animals results in its excess accumulation in manure, which ultimately causes groundwater eutrophication. As a first step toward breeding low PA mutants in oilseed rape (Brassica napus L.), we identified knockout mutants in PA biosynthesis and transporter genes. The obtained M3 single mutants of Bn.MRP5.A10 and Bn.MRP5.C09 were combined by crossing to produce double mutants. Simultaneously, crosses were performed with the non-mutagenized EMS donor genotype to reduce the background mutation load. Double mutants identified from the F2 progeny of direct M3 crosses and BC1 plants showed 15% reduction in PA contents with no significant differences in Pi. We are discussing the function of BnMRP5 paralogs and the benefits for breeding Bnmrp5 mutants in respect to low PA, yield, and stress tolerances.
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Grases F, Costa-Bauza A. Key Aspects of Myo-Inositol Hexaphosphate (Phytate) and Pathological Calcifications. Molecules 2019; 24:molecules24244434. [PMID: 31817119 PMCID: PMC6943413 DOI: 10.3390/molecules24244434] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/21/2019] [Accepted: 12/02/2019] [Indexed: 11/16/2022] Open
Abstract
Phytate (myo-inositol hexaphosphate, InsP6) is an important component of seeds, legumes, nuts, and whole cereals. Although this molecule was discovered in 1855, its biological effects as an antinutrient was first described in 1940. The antinutrient effect of phytate results because it can decrease the bioavailability of important minerals under certain circumstances. However, during the past 30 years, researchers have identified many important health benefits of phytate. Thus, 150 years have elapsed since the discovery of phytate to the first descriptions of its beneficial effects. This long delay may be due to the difficulty in determining phytate in biological media, and because phytate dephosphorylation generates many derivatives (InsPs) that also have important biological functions. This paper describes the role of InsP6 in blocking the development of pathological calcifications. Thus, in vitro studies have shown that InsP6 and its hydrolysates (InsPs), as well as pyrophosphate, bisphosphonates, and other polyphosphates, have high capacity to inhibit calcium salt crystallization. Oral or topical administration of phytate in vivo significantly decreases the development of pathological calcifications, although the details of the underlying mechanism are uncertain. Moreover, oral or topical administration of InsP6 also leads to increased urinary excretion of mixtures of different InsPs; in the absence of InsP6 administration, only InsP2 occurs at detectable levels in urine.
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Watson FT, Smernik RJ, Doolette AL. Thermal degradation of phytate produces all four possible inositol pentakisphosphates as determined by ion chromatography and 1H and 31P NMR spectroscopy. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2019.1633317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Flynn T. Watson
- The Australian Wine Research Institute, Glen Osmond, SA, Australia
- School of Agriculture, Food and Wine, The University of Adelaide, Waite Research Institute, Glen Osmond, SA, Australia
| | - Ronald J. Smernik
- School of Agriculture, Food and Wine, The University of Adelaide, Waite Research Institute, Glen Osmond, SA, Australia
| | - Ashlea L. Doolette
- School of Agriculture, Food and Wine, The University of Adelaide, Waite Research Institute, Glen Osmond, SA, Australia
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Qamar ZU, Hameed A, Ashraf M, Rizwan M, Akhtar M. Development and Molecular Characterization of Low Phytate Basmati Rice Through Induced Mutagenesis, Hybridization, Backcross, and Marker Assisted Breeding. FRONTIERS IN PLANT SCIENCE 2019; 10:1525. [PMID: 31850026 PMCID: PMC6901921 DOI: 10.3389/fpls.2019.01525] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 11/01/2019] [Indexed: 06/10/2023]
Abstract
Breeding low phytate crops is the most viable solution to tackle mineral deficiencies. The objective of the present study was to develop high yielding, low phytate (lpa) basmati rice cultivars. Three homozygous lpa mutants, Lpa5, Lpa9, and Lpa59, were developed through induced mutations (gamma rays 60Co) and identified by colorimetric and High Performance Liquid Chromatography (HPLC) analysis. These mutants showed 54%-63% reduction in phytic acid but had poor germination and yield. To improve these traits, hybridization and back cross breeding involving Lpa5, Lpa59, and parent cultivar Super Basmati were performed and F2:3, F3:4, BC1F2:3, and BC1F3:4 generations were developed and screened to target the objective. Within the F2:3, homozygous (226), heterozygous (65), and wild type (46) lpa recombinants were identified. Within the homozygous lpa category, four recombinants (Lpa5, Lpa6, Lpa7, and Lpa30) showed improved germination. Within the F3:4 generation, 86 homozygous lpa recombinants were identified. Further selection, on the basis of better plant type and the low phytate trait resulted in the selection of 38 recombinants. Grain quality and cooking characteristics of these selected recombinants were comparable as compared to parent cultivar. Within the BC1F2:3 generations, two homozygous Lpa recombinant lines, Lpa141, and Lpa205, were selected out of 220. Screening of the BC1F3:4 generation for the desirable agronomic and low phytate trait also resulted in the selection of two homozygous lines. Finally, seven recombinants i.e. Lpa12-3, Lpa111-1, Lpa141, Lpa56-3, Lpa53-4, Lpa99-2, and Lpa205-4 out of 42 homozygous low phytate lines were selected on the basis of yield improvement (4%-18%) as compared to parent cultivar. Association analysis suggested that further selection based on primary branches per plant, panicle length and productive tillers per plant would further improve the paddy yield. For molecular characterization of the Lpa trait, previously reported Lpa1-CAPS and Lpa1-InDel and functional molecular markers were applied. Results indicated the absence of the Z9B-Lpa allele and XS-Lpa mutation in the OsMRP5 gene in tested mutants, possibly suggesting that there may be new mutations or novel alleles in tested mutants that need to be identified and then fine mapped for subsequent utilization. To our knowledge, this is the first report of low phytic acid rice mutant development and their improved germination and yield through backcross breeding in basmati rice.
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Affiliation(s)
- Zia-ul- Qamar
- Plant Breeding and Genetics Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
| | - Amjad Hameed
- Plant Breeding and Genetics Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
| | - Muhammad Ashraf
- Plant Breeding and Genetics Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
| | - Muhammad Rizwan
- Plant Breeding and Genetics Division, Nuclear Institute of Agriculture (NIA), Tando Jam (Sindh), Pakistan
| | - Muhammad Akhtar
- Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan
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Perera I, Fukushima A, Akabane T, Horiguchi G, Seneweera S, Hirotsu N. Expression regulation of myo-inositol 3-phosphate synthase 1 (INO1) in determination of phytic acid accumulation in rice grain. Sci Rep 2019; 9:14866. [PMID: 31619750 PMCID: PMC6795888 DOI: 10.1038/s41598-019-51485-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/02/2019] [Indexed: 01/07/2023] Open
Abstract
Phytic acid (PA) is the primary phosphorus (P) storage compound in the seeds of cereals and legumes. Low PA crops, which are considered an effective way to improve grain nutrient availability and combat environmental issues relating to seed P have been developed using mutational and reverse genetics approaches. Here, we identify molecular mechanism regulating PA content among natural rice variants. First, we performed genome-wide association (GWA) mapping of world rice core collection (WRC) accessions to understand the genetic determinants underlying PA trait in rice. Further, a comparative study was undertaken to identify the differences in PA accumulation, protein profiles, and gene expression in low (WRC 5) and high PA (WRC 6) accessions. GWA results identified myo-inositol 3-phosphate synthase 1 (INO1) as being closely localized to a significant single nucleotide polymorphism. We found high rates of PA accumulation 10 days after flowering, and our results indicate that INO1 expression was significantly higher in WRC 6 than in WRC 5. Seed proteome assays found that the expression of INO1 was significantly higher in WRC 6. These results suggest that not only the gene itself but regulation of INO1 gene expression at early developmental stages is important in determining PA content in rice.
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Affiliation(s)
- Ishara Perera
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
- Grain Legumes and Oil Crops Research and Development Centre, Department of Agriculture, Angunakolapelessa, Sri Lanka
| | - Ayaka Fukushima
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Tatsuki Akabane
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Genki Horiguchi
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan
| | - Saman Seneweera
- National Institute of Fundamental Studies, Hantana Road, Kandy, Sri Lanka
- Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD, 4350, Australia
| | - Naoki Hirotsu
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan.
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193, Japan.
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Gibson RS, Raboy V, King JC. Implications of phytate in plant-based foods for iron and zinc bioavailability, setting dietary requirements, and formulating programs and policies. Nutr Rev 2019; 76:793-804. [PMID: 30010865 DOI: 10.1093/nutrit/nuy028] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Plant-based diets in low-income countries (LICs) have a high content of phytic acid (myo-inositol hexaphosphate [InsP6]) and associated magnesium, potassium, and calcium salts. Together, InsP6 acid and its salts are termed "phytate" and are potent inhibitors of iron and zinc absorption. Traditional food processing can reduce the InsP6 content through loss of water-soluble phytate or through phytase hydrolysis to lower myo-inositol phosphate forms that no longer inhibit iron and zinc absorption. Hence, some processing practices can reduce the need for high-dose iron fortificants in plant-based diets and alleviate safety concerns. Dietary phytate-to-iron and phytate-to-zinc molar ratios are used to estimate iron and zinc bioavailability and to identify dietary iron and zinc requirements according to diet type. The European Food Safety Authority has set adult dietary zinc requirements for 4 levels of phytate intake, highlighting the urgent need for phytate food composition data. Such data will improve the ability to estimate the prevalence of inadequate zinc intakes in vulnerable groups in LICs, which will facilitate implementation of targeted policies to alleviate zinc deficiency.
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Affiliation(s)
- Rosalind S Gibson
- Department of Human Nutrition, University of Otago, Dunedin, New Zealand
| | - Victor Raboy
- United States Department of Agriculture-Agricultural Research Service, Aberdeen, Idaho, USA
| | - Janet C King
- Children's Hospital Oakland Research Institute, Oakland, California, USA
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Rollán GC, Gerez CL, LeBlanc JG. Lactic Fermentation as a Strategy to Improve the Nutritional and Functional Values of Pseudocereals. Front Nutr 2019; 6:98. [PMID: 31334241 PMCID: PMC6617224 DOI: 10.3389/fnut.2019.00098] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 06/14/2019] [Indexed: 12/15/2022] Open
Abstract
One of the greatest challenges is to reduce malnutrition worldwide while promoting sustainable agricultural and food systems. This is a daunting task due to the constant growth of the population and the increasing demands by consumers for functional foods with higher nutritional values. Cereal grains are the most important dietary energy source globally; wheat, rice, and maize currently provide about half of the dietary energy source of humankind. In addition, the increase of celiac patients worldwide has motivated the development of gluten-free foods using alternative flour types to wheat such as rice, corn, cassava, soybean, and pseudocereals (amaranth, quinoa, and buckwheat). Amaranth and quinoa have been cultivated since ancient times and were two of the major crops of the Pre-Colombian cultures in Latin- America. In recent years and due to their well-known high nutritional value and potential health benefits, these pseudocereals have received much attention as ideal candidates for gluten-free products. The importance of exploiting these grains for the elaboration of healthy and nutritious foods has forced food producers to develop novel adequate strategies for their processing. Fermentation is one of the most antique and economical methods of producing and preserving foods and can be easily employed for cereal processing. The nutritional and functional quality of pseudocereals can be improved by fermentation using Lactic Acid Bacteria (LAB). This review provides an overview on pseudocereal fermentation by LAB emphasizing the capacity of these bacteria to decrease antinutritional factors such as phytic acid, increase the functional value of phytochemicals such as phenolic compounds, and produce nutritional ingredients such as B-group vitamins. The numerous beneficial effects of lactic fermentation of pseudocereals can be exploited to design novel and healthier foods or grain ingredients destined to general population and especially to patients with coeliac disease.
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Affiliation(s)
- Graciela C. Rollán
- Centro de Referencia para Lactobacilos (CERELA) - CONICET, San Miguel de Tucumán, Argentina
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Kishor DS, Lee C, Lee D, Venkatesh J, Seo J, Chin JH, Jin Z, Hong SK, Ham JK, Koh HJ. Novel allelic variant of Lpa1 gene associated with a significant reduction in seed phytic acid content in rice (Oryza sativa L.). PLoS One 2019; 14:e0209636. [PMID: 30870429 PMCID: PMC6417671 DOI: 10.1371/journal.pone.0209636] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/19/2019] [Indexed: 01/26/2023] Open
Abstract
In plants, myo-inositol-1,2,3,4,5,6-hexakisphosphate (InsP6), also known as phytic acid (PA), is a major component of organic phosphorus (P), and accounts for up to 85% of the total P in seeds. In rice (Oryza sativa L.), PA mainly accumulates in rice bran, and chelates mineral cations, resulting in mineral deficiencies among brown rice consumers. Therefore, considerable efforts have been focused on the development of low PA (LPA) rice cultivars. In this study, we performed genetic and molecular analyses of OsLpa1, a major PA biosynthesis gene, in Sanggol, a low PA mutant variety developed via chemical mutagenesis of Ilpum rice cultivar. Genetic segregation and sequencing analyses revealed that a recessive allele, lpa1-3, at the OsLpa1 locus (Os02g0819400) was responsible for a significant reduction in seed PA content in Sanggol. The lpa1-3 gene harboured a point mutation (C623T) in the fourth exon of the predicted coding region, resulting in threonine (Thr) to isoleucine (Ile) amino acidsubstitution at position 208 (Thr208Ile). Three-dimensional analysis of Lpa1 protein structure indicated that myo-inositol 3-monophosphate [Ins(3)P1] could bind to the active site of Lpa1, with ATP as a cofactor for catalysis. Furthermore, the presence of Thr208 in the loop adjacent to the entry site of the binding pocket suggests that Thr208Ile substitution is involved in regulating enzyme activity via phosphorylation. Therefore, we propose that Thr208Ile substitution in lpa1-3 reduces Lpa1 enzyme activity in Sanggol, resulting in reduced PA biosynthesis.
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Affiliation(s)
- D. S. Kishor
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Choonseok Lee
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Dongryung Lee
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Jelli Venkatesh
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Jeonghwan Seo
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Joong Hyoun Chin
- Graduate School of Integrated Bioindustry, Sejong University, Seoul, Republic of Korea
| | - Zhuo Jin
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - Soon-Kwan Hong
- Division of Biotechnology, Kangwon National University, Chuncheon, Gangwon-do, Republic of Korea
| | - Jin-Kwan Ham
- Gangwon provincial Agricultural Research & Extension Services, Chuncheon, Gangwon-do, Republic of Korea
| | - Hee Jong Koh
- Department of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
- * E-mail:
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Younessi-Hamzekhanlu M, Izadi-Darbandi A, Malboobi MA, Ebrahimi M, Abdipour M, Sparvoli F, Paolo D. Agrobacterium rhizogenes transformed soybeans with AtPAP18 gene show enhanced phosphorus uptake and biomass production. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1473053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022] Open
Affiliation(s)
- Mehdi Younessi-Hamzekhanlu
- Department of Forestry and Medicinal Plants, Ahar Faculty of Agriculture and Natural Resources, University of Tabriz, Ahar, Iran
| | - Ali Izadi-Darbandi
- Department of Agronomy and Plant Breeding Sciences, University of Tehran, College of Aburaihan, Tehran, Iran
| | - Mohammad Ali Malboobi
- Department of Plant Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Mohsen Ebrahimi
- Department of Agronomy and Plant Breeding Sciences, University of Tehran, College of Aburaihan, Tehran, Iran
| | - Moslem Abdipour
- Kohgiluyeh and Boyerahmad Agricultural and Natural Resources, Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Yasouj, Kohgiluyeh and Boyerahmad, Iran
| | - Francesca Sparvoli
- CNR – National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Milan, Italy
| | - Dario Paolo
- Food technology research unit (CRA-IAA) Council For Agricultural Research and Agricultural Economics Analysis, Rome, Italy
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29
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Edney MJ, Rossnagel BG, Raboy V. Effect of Low-Phytate Barley on Malt Quality, Including Mineral Loss, during Fermentation. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-2007-0305-01] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- M. J. Edney
- Grain Research Laboratory, Canadian Grain Commission, Winnipeg, MB, Canada
| | - B. G. Rossnagel
- Crop Development Centre, University of Saskatchewan, Saskatoon, SK, Canada
| | - V. Raboy
- United States Department of Agriculture-Agricultural Research Service, Aberdeen, ID
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30
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Perera I, Seneweera S, Hirotsu N. Manipulating the Phytic Acid Content of Rice Grain Toward Improving Micronutrient Bioavailability. RICE (NEW YORK, N.Y.) 2018; 11:4. [PMID: 29327163 PMCID: PMC5764899 DOI: 10.1186/s12284-018-0200-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 01/05/2018] [Indexed: 05/18/2023]
Abstract
Myo-inositol hexaphosphate, also known as phytic acid (PA), is the most abundant storage form of phosphorus in seeds. PA acts as a strong chelator of metal cations to form phytate and is considered an anti-nutrient as it reduces the bioavailability of important micronutrients. Although the major nutrient source for more than one-half of the global population, rice is a poor source of essential micronutrients. Therefore, biofortification and reducing the PA content of rice have arisen as new strategies for increasing micronutrient bioavailability in rice. Furthermore, global climate change effects, particularly rising atmospheric carbon dioxide concentration, are expected to increase the PA content and reduce the concentrations of most of the essential micronutrients in rice grain. Several genes involved in PA biosynthesis have been identified and characterized in rice. Proper understanding of the genes related to PA accumulation during seed development and creating the means to suppress the expression of these genes should provide a foundation for manipulating the PA content in rice grain. Low-PA rice mutants have been developed that have a significantly lower grain PA content, but these mutants also had reduced yields and poor agronomic performance, traits that challenge their effective use in breeding programs. Nevertheless, transgenic technology has been effective in developing low-PA rice without hampering plant growth or seed development. Moreover, manipulating the micronutrient distribution in rice grain, enhancing micronutrient levels and reducing the PA content in endosperm are possible strategies for increasing mineral bioavailability. Therefore, a holistic breeding approach is essential for developing successful low-PA rice lines. In this review, we focus on the key determinants for PA concentration in rice grain and discuss the possible molecular methods and approaches for manipulating the PA content to increase micronutrient bioavailability.
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Affiliation(s)
- Ishara Perera
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193 Japan
| | - Saman Seneweera
- Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD 4350 Australia
| | - Naoki Hirotsu
- Graduate School of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193 Japan
- Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD 4350 Australia
- Faculty of Life Sciences, Toyo University, 1-1-1 Izumino, Itakura-machi, Oura-gun, Gunma, 374-0193 Japan
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31
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Pandey V, Krishnan V, Basak N, Marathe A, Thimmegowda V, Dahuja A, Jolly M, Sachdev A. Molecular modeling and in silico characterization of GmABCC5: a phytate transporter and potential target for low-phytate crops. 3 Biotech 2018; 8:54. [PMID: 29354365 DOI: 10.1007/s13205-017-1053-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 12/17/2017] [Indexed: 02/06/2023] Open
Abstract
Designing low-phytate crops without affecting the developmental process in plants had led to the identification of ABCC5 gene in soybean. The GmABCC5 gene was identified and a partial gene sequence was cloned from popular Indian soybean genotype Pusa16. Conserved domains and motifs unique to ABC transporters were identified in the 30 homologous sequences retrieved by BLASTP analysis. The homologs were analyzed for their evolutionary relationship and physiochemical properties. Conserved domains, transmembrane architecture and secondary structure of GmABCC5 were predicted with the aid of computational tools. Analysis identified 53 alpha helices and 31 beta strands, predicting 60% residues in alpha conformation. A three-dimensional (3D) model for GmABCC5 was developed based on 5twv.1.B (Homo sapiens) template homology to gain better insight into its molecular mechanism of transport and sequestration. Spatio-temporal real-time PCR analysis identified mid-to-late seed developmental stages as the time window for the maximum GmABCC5 gene expression, a potential target stage for phytate reduction. Results of this study provide valuable insights into the structural and functional characteristics of GmABCC5, which may be further utilized for the development of nutritionally enriched low-phytate soybean with improved mineral bioavailability.
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Affiliation(s)
- Vanita Pandey
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
- Quality and Basic Sciences, ICAR-Indian Institute of Wheat and Barley Research, Karnal, New Delhi 132 001 India
| | - Veda Krishnan
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Nabaneeta Basak
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
- Crop Physiology and Biochemistry, ICAR-National Rice Research Institute, Cuttack, 753006 India
| | - Ashish Marathe
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Vinutha Thimmegowda
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Anil Dahuja
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Monica Jolly
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Archana Sachdev
- 1Division of Biochemistry, ICAR-Indian Agricultural Research Institute, New Delhi, 110012 India
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Aggarwal S, Kumar A, Bhati KK, Kaur G, Shukla V, Tiwari S, Pandey AK. RNAi-Mediated Downregulation of Inositol Pentakisphosphate Kinase ( IPK1) in Wheat Grains Decreases Phytic Acid Levels and Increases Fe and Zn Accumulation. FRONTIERS IN PLANT SCIENCE 2018; 9:259. [PMID: 29559984 PMCID: PMC5845732 DOI: 10.3389/fpls.2018.00259] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/14/2018] [Indexed: 05/18/2023]
Abstract
Enhancement of micronutrient bioavailability is crucial to address the malnutrition in the developing countries. Various approaches employed to address the micronutrient bioavailability are showing promising signs, especially in cereal crops. Phytic acid (PA) is considered as a major antinutrient due to its ability to chelate important micronutrients and thereby restricting their bioavailability. Therefore, manipulating PA biosynthesis pathway has largely been explored to overcome the pleiotropic effect in different crop species. Recently, we reported that functional wheat inositol pentakisphosphate kinase (TaIPK1) is involved in PA biosynthesis, however, the functional roles of the IPK1 gene in wheat remains elusive. In this study, RNAi-mediated gene silencing was performed for IPK1 transcripts in hexaploid wheat. Four non-segregating RNAi lines of wheat were selected for detailed study (S3-D-6-1; S6-K-3-3; S6-K-6-10 and S16-D-9-5). Homozygous transgenic RNAi lines at T4 seeds with a decreased transcript of TaIPK1 showed 28-56% reduction of the PA. Silencing of IPK1 also resulted in increased free phosphate in mature grains. Although, no phenotypic changes in the spike was observed but, lowering of grain PA resulted in the reduced number of seeds per spikelet. The lowering of grain PA was also accompanied by a significant increase in iron (Fe) and zinc (Zn) content, thereby enhancing their molar ratios (Zn:PA and Fe:PA). Overall, this work suggests that IPK1 is a promising candidate for employing genome editing tools to address the mineral accumulation in wheat grains.
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Affiliation(s)
- Sipla Aggarwal
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Anil Kumar
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Kaushal K. Bhati
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
- Copenhagen Plant Science Centre, PLEN, University of Copenhagen, Copenhagen, Denmark
| | - Gazaldeep Kaur
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Vishnu Shukla
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Siddharth Tiwari
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
| | - Ajay K. Pandey
- Department of Biotechnology, National Agri-Food Biotechnology Institute, Mohali, India
- *Correspondence: Ajay K. Pandey, ;
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33
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Evaluation of Simple and Inexpensive High-Throughput Methods for Phytic Acid Determination. J AM OIL CHEM SOC 2017. [DOI: 10.1007/s11746-016-2946-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hui Q, Yang R, Shen C, Zhou Y, Gu Z. Mechanism of Calcium Lactate Facilitating Phytic Acid Degradation in Soybean during Germination. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:5564-73. [PMID: 27324823 DOI: 10.1021/acs.jafc.6b01598] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Calcium lactate facilitates the growth and phytic acid degradation of soybean sprouts, but the mechanism is unclear. In this study, calcium lactate (Ca) and calcium lactate with lanthanum chloride (Ca+La) were used to treat soybean sprouts to reveal the relevant mechanism. Results showed that the phytic acid content decreased and the availability of phosphorus increased under Ca treatment. This must be due to the enhancement of enzyme activity related to phytic acid degradation. In addition, the energy metabolism was accelerated by Ca treatment. The energy status and energy metabolism-associated enzyme activity also increased. However, the transmembrane transport of calcium was inhibited by La(3+) and concentrated in intercellular space or between the cell wall and cell membrane; thus, Ca+La treatment showed reverse results compared with those of Ca treatment. Interestingly, gene expression did not vary in accordance with their enzyme activity. These results demonstrated that calcium lactate increased the rate of phytic acid degradation by enhancing growth, phosphorus metabolism, and energy metabolism.
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Affiliation(s)
- Qianru Hui
- College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China
| | - Runqiang Yang
- College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China
| | - Chang Shen
- College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China
| | - Yulin Zhou
- College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China
| | - Zhenxin Gu
- College of Food Science and Technology, Nanjing Agricultural University , Nanjing, Jiangsu 210095, People's Republic of China
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Bhati KK, Alok A, Kumar A, Kaur J, Tiwari S, Pandey AK. Silencing of ABCC13 transporter in wheat reveals its involvement in grain development, phytic acid accumulation and lateral root formation. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:4379-89. [PMID: 27342224 PMCID: PMC5301939 DOI: 10.1093/jxb/erw224] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Low phytic acid is a trait desired in cereal crops and can be achieved by manipulating the genes involved either in its biosynthesis or its transport in the vacuoles. Previously, we have demonstrated that the wheat TaABCC13 protein is a functional transporter, primarily involved in heavy metal tolerance, and a probable candidate gene to achieve low phytate wheat. In the current study, RNA silencing was used to knockdown the expression of TaABCC13 in order to evaluate its functional importance in wheat. Transgenic plants with significantly reduced TaABCC13 transcripts in either seeds or roots were selected for further studies. Homozygous RNAi lines K1B4 and K4G7 exhibited 34-22% reduction of the phytic acid content in the mature grains (T4 seeds). These transgenic lines were defective for spike development, as characterized by reduced grain filling and numbers of spikelets. The seeds of transgenic wheat had delayed germination, but the viability of the seedlings was unaffected. Interestingly, early emergence of lateral roots was observed in TaABCC13-silenced lines as compared to non-transgenic lines. In addition, these lines also had defects in metal uptake and development of lateral roots in the presence of cadmium stress. Our results suggest roles of TaABCC13 in lateral root initiation and enhanced sensitivity towards heavy metals. Taken together, these data demonstrate that wheat ABCC13 is functionally important for grain development and plays an important role during detoxification of heavy metals.
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Affiliation(s)
- Kaushal Kumar Bhati
- National Agri-Food Biotechnology Institute (Department of Biotechnology), C-127, Industrial Area, Phase VIII, S.A.S. Nagar, Mohali-160071, Punjab, India
| | - Anshu Alok
- National Agri-Food Biotechnology Institute (Department of Biotechnology), C-127, Industrial Area, Phase VIII, S.A.S. Nagar, Mohali-160071, Punjab, India
| | - Anil Kumar
- National Agri-Food Biotechnology Institute (Department of Biotechnology), C-127, Industrial Area, Phase VIII, S.A.S. Nagar, Mohali-160071, Punjab, India
| | - Jagdeep Kaur
- Department of Biotechnology, Panjab University, Chandigarh, Punjab, India
| | - Siddharth Tiwari
- National Agri-Food Biotechnology Institute (Department of Biotechnology), C-127, Industrial Area, Phase VIII, S.A.S. Nagar, Mohali-160071, Punjab, India
| | - Ajay Kumar Pandey
- National Agri-Food Biotechnology Institute (Department of Biotechnology), C-127, Industrial Area, Phase VIII, S.A.S. Nagar, Mohali-160071, Punjab, India
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36
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Veum TL, Raboy V. Hulled and hull-less barley grains with the genetic trait for low-phytic acid increased the apparent total-tract digestibility of phosphorus and calcium in diets for young swine. J Anim Sci 2016; 94:1000-11. [PMID: 27065262 DOI: 10.2527/jas.2015-9994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A 35-d experiment was conducted using 63 crossbred pigs (35 barrows and 28 gilts) with an initial average BW of 7.0 kg and age of 28 d to evaluate the efficacy of the low-phytic acid (LPA) genetic trait in hulled or hull-less barley in isocaloric diets. Hulled barleys were the normal barley (NB) cultivar Harrington and the near-isogenic LPA mutant 955 (M955) with P availabilities of 36 and 95%, respectively. Hull-less lines were produced by crossing NB and the LPA mutant 422 line with a hull-less line, producing hull-less NB (HNB) and hull-less mutant 422 (HM422) with P availabilities of 41 and 66%, respectively. Pigs were in individual metabolism cages or pens for Phase 1 (d 0 to 14) and Phase 2 (d 14 to 35). Diets defined as NB, HNB, HM422, or M955 with no added inorganic P (iP) had available P (aP) concentrations of 0.27, 0.28, 0.35, and 0.40% for Phase 1 and 0.15, 0.17, 0.23, and 0.31% for Phase 2, respectively. Only diet M955 was adequate in aP. Therefore, iP was added to the P-deficient diets to make diets NB + iP, HNB + iP, and HM422 + iP with aP equal to that in diet M955. Overall (d 0 to 35), ADG and G:F were greater ( < 0.01) for pigs fed diet M955 or the diets with added iP than for pigs fed the NB diet. Serum tartrate-resistant acid phosphatase activity on d 34 was greater ( < 0.01) for pigs fed the NB or HNB diets than for pigs fed the other diets. Bone breaking strength and P absorption (g/d) were greater ( < 0.01) for pigs fed diet M955 or the diets with iP than for pigs fed the NB or HNB diets. Pigs fed diet M955 absorbed greater ( < 0.01) percentages of P and Ca and had less ( < 0.01) fecal excretion of P (g/d and %) and Ca (%) than pigs fed the other diets. In conclusion, the LPA genetic trait was effective in hulled and hull-less barley in isocaloric diets fed to young pigs. Pigs fed the diet with LPA M955 consumed 31% less P and excreted 78% less fecal P and 30% less fecal Ca than pigs fed the diet with NB + iP that was equal to diet M955 in aP. Therefore, LPA barley, especially M955 with 95% aP, will reduce the use of iP in swine diets, reduce P pollution from swine manure, and support the goal of achieving global P sustainability.
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Vandamme E, Wissuwa M, Rose T, Dieng I, Drame KN, Fofana M, Senthilkumar K, Venuprasad R, Jallow D, Segda Z, Suriyagoda L, Sirisena D, Kato Y, Saito K. Genotypic Variation in Grain P Loading across Diverse Rice Growing Environments and Implications for Field P Balances. FRONTIERS IN PLANT SCIENCE 2016; 7:1435. [PMID: 27729916 PMCID: PMC5037189 DOI: 10.3389/fpls.2016.01435] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 09/08/2016] [Indexed: 05/08/2023]
Abstract
More than 60% of phosphorus (P) taken up by rice (Oryza spp.) is accumulated in the grains at harvest and hence exported from fields, leading to a continuous removal of P. If P removed from fields is not replaced by P inputs then soil P stocks decline, with consequences for subsequent crops. Breeding rice genotypes with a low concentration of P in the grains could be a strategy to reduce maintenance fertilizer needs and slow soil P depletion in low input systems. This study aimed to assess variation in grain P concentrations among rice genotypes across diverse environments and evaluate the implications for field P balances at various grain yield levels. Multi-location screening experiments were conducted at different sites across Africa and Asia and yield components and grain P concentrations were determined at harvest. Genotypic variation in grain P concentration was evaluated while considering differences in P supply and grain yield using cluster analysis to group environments and boundary line analysis to determine minimum grain P concentrations at various yield levels. Average grain P concentrations across genotypes varied almost 3-fold among environments, from 1.4 to 3.9 mg g-1. Minimum grain P concentrations associated with grain yields of 150, 300, and 500 g m-2 varied between 1.2 and 1.7, 1.3 and 1.8, and 1.7 and 2.2 mg g-1 among genotypes respectively. Two genotypes, Santhi Sufaid and DJ123, were identified as potential donors for breeding for low grain P concentration. Improvements in P balances that could be achieved by exploiting this genotypic variation are in the range of less than 0.10 g P m-2 (1 kg P ha-1) in low yielding systems, and 0.15-0.50 g P m-2 (1.5-5.0 kg P ha-1) in higher yielding systems. Improved crop management and alternative breeding approaches may be required to achieve larger reductions in grain P concentrations in rice.
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Affiliation(s)
- Elke Vandamme
- Africa Rice CenterDar es Salaam, Tanzania
- *Correspondence: Elke Vandamme
| | - Matthias Wissuwa
- Crop Production and Environment Division, Japan International Research Centre for Agricultural ScienceTsukuba, Japan
| | - Terry Rose
- Southern Cross Plant Science, Southern Cross UniversityLismore, NSW, Australia
- Southern Cross GeoScience, Southern Cross UniversityLismore, NSW, Australia
| | | | | | | | | | | | - Demba Jallow
- National Agricultural Research InstituteBrikama, Gambia
| | - Zacharie Segda
- Programme Riz et Riziculture, CNRST/INERABobo Dioulasso, Burkina Faso
| | - Lalith Suriyagoda
- Department of Crop Science, Faculty of Agriculture, University of PeradeniyaPeradeniya, Sri Lanka
| | | | - Yoichiro Kato
- Crop and Environmental Sciences Division, International Rice Research InstituteMetro Manila, Philippines
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Affiliation(s)
- Karen Cichy
- USDA-ARS Small Grains and Potato Germplasm Research Unit; Aberdeen Idaho
| | - Victor Raboy
- USDA-ARS Small Grains and Potato Germplasm Research Unit; Aberdeen Idaho
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Abstract
One of the many ways that climate change may affect human health is by altering the nutrient content of food crops. However, previous attempts to study the effects of increased atmospheric CO2 on crop nutrition have been limited by small sample sizes and/or artificial growing conditions. Here we present data from a meta-analysis of the nutritional contents of the edible portions of 41 cultivars of six major crop species grown using free-air CO2 enrichment (FACE) technology to expose crops to ambient and elevated CO2 concentrations in otherwise normal field cultivation conditions. This data, collected across three continents, represents over ten times more data on the nutrient content of crops grown in FACE experiments than was previously available. We expect it to be deeply useful to future studies, such as efforts to understand the impacts of elevated atmospheric CO2 on crop macro- and micronutrient concentrations, or attempts to alleviate harmful effects of these changes for the billions of people who depend on these crops for essential nutrients.
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A Substantial Fraction of Barley (Hordeum vulgare L.) Low Phytic Acid Mutations Have Little or No Effect on Yield across Diverse Production Environments. PLANTS 2015; 4:225-39. [PMID: 27135325 PMCID: PMC4844328 DOI: 10.3390/plants4020225] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 04/17/2015] [Accepted: 04/21/2015] [Indexed: 11/17/2022]
Abstract
The potential benefits of the low phytic acid (lpa) seed trait for human and animal nutrition, and for phosphorus management in non-ruminant animal production, are well documented. However, in many cases the lpa trait is associated with impaired seed or plant performance, resulting in reduced yield. This has given rise to the perception that the lpa trait is tightly correlated with reduced yield in diverse crop species. Here we report a powerful test of this correlation. We measured grain yield in lines homozygous for each of six barley (Hordeum vulgare L.) lpa mutations that greatly differ in their seed phytic acid levels. Performance comparisons were between sibling wild-type and mutant lines obtained following backcrossing, and across two years in five Idaho (USA) locations that greatly differ in crop yield potential. We found that one lpa mutation (Hvlpa1-1) had no detectable effect on yield and a second (Hvlpa4-1) resulted in yield losses of only 3.5%, across all locations. When comparing yields in three relatively non-stressful production environments, at least three lpa mutations (Hvlpa1-1, Hvlpa3-1, and Hvlpa4-1) typically had yields similar to or within 5% of the wild-type sibling isoline. Therefore in the case of barley, lpa mutations can be readily identified that when simply incorporated into a cultivar result in adequately performing lines, even with no additional breeding for performance within the lpa line. In conclusion, while some barley lpa mutations do impact field performance, a substantial fraction appears to have little or no effect on yield.
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Williams SP, Gillaspy GE, Perera IY. Biosynthesis and possible functions of inositol pyrophosphates in plants. FRONTIERS IN PLANT SCIENCE 2015; 6:67. [PMID: 25729385 PMCID: PMC4325660 DOI: 10.3389/fpls.2015.00067] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 01/26/2015] [Indexed: 05/24/2023]
Abstract
Inositol phosphates (InsPs) are intricately tied to lipid signaling, as at least one portion of the inositol phosphate signaling pool is derived from hydrolysis of the lipid precursor, phosphatidyl inositol (4,5) bisphosphate. The focus of this review is on the inositol pyrophosphates, which are a novel group of InsP signaling molecules containing diphosphate or triphosphate chains (i.e., PPx) attached to the inositol ring. These PPx-InsPs are emerging as critical players in the integration of cellular metabolism and stress signaling in non-plant eukaryotes. Most eukaryotes synthesize the precursor molecule, myo-inositol (1,2,3,4,5,6)-hexakisphosphate (InsP6), which can serve as a signaling molecule or as storage compound of inositol, phosphorus, and minerals (referred to as phytic acid). Even though plants produce huge amounts of precursor InsP6 in seeds, almost no attention has been paid to whether PPx-InsPs exist in plants, and if so, what roles these molecules play. Recent work has delineated that Arabidopsis has two genes capable of PP-InsP5 synthesis, and PPx-InsPs have been detected across the plant kingdom. This review will detail the known roles of PPx-InsPs in yeast and animal systems, and provide a description of recent data on the synthesis and accumulation of these novel molecules in plants, and potential roles in signaling.
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Affiliation(s)
- Sarah P. Williams
- Biochemistry, Virginia Polytechnic and State UniversityBlacksburg, VA, USA
| | - Glenda E. Gillaspy
- Biochemistry, Virginia Polytechnic and State UniversityBlacksburg, VA, USA
| | - Imara Y. Perera
- Plant and Microbial Biology, North Carolina State UniversityRaleigh, NC, USA
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Graminho ER, Takaya N, Nakamura A, Hoshino T. Purification, biochemical characterization, and genetic cloning of the phytase produced by Burkholderia sp. strain a13. J GEN APPL MICROBIOL 2015; 61:15-23. [DOI: 10.2323/jgam.61.15] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
| | - Naoki Takaya
- Faculty of Life and Environmental Sciences, University of Tsukuba
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, University of Tsukuba
| | - Takayuki Hoshino
- Faculty of Life and Environmental Sciences, University of Tsukuba
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Desai M, Rangarajan P, Donahue JL, Williams SP, Land ES, Mandal MK, Phillippy BQ, Perera IY, Raboy V, Gillaspy GE. Two inositol hexakisphosphate kinases drive inositol pyrophosphate synthesis in plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 80:642-53. [PMID: 25231822 DOI: 10.1111/tpj.12669] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 08/22/2014] [Accepted: 08/27/2014] [Indexed: 05/24/2023]
Abstract
Inositol pyrophosphates are unique cellular signaling molecules with recently discovered roles in energy sensing and metabolism. Studies in eukaryotes have revealed that these compounds have a rapid turnover, and thus only small amounts accumulate. Inositol pyrophosphates have not been the subject of investigation in plants even though seeds produce large amounts of their precursor, myo-inositol hexakisphosphate (InsP6 ). Here, we report that Arabidopsis and maize InsP6 transporter mutants have elevated levels of inositol pyrophosphates in their seed, providing unequivocal identification of their presence in plant tissues. We also show that plant seeds store a little over 1% of their inositol phosphate pool as InsP7 and InsP8 . Many tissues, including, seed, seedlings, roots and leaves accumulate InsP7 and InsP8 , thus synthesis is not confined to tissues with high InsP6 . We have identified two highly similar Arabidopsis genes, AtVip1 and AtVip2, which are orthologous to the yeast and mammalian VIP kinases. Both AtVip1 and AtVip2 encode proteins capable of restoring InsP7 synthesis in yeast mutants, thus AtVip1 and AtVip2 can function as bonafide InsP6 kinases. AtVip1 and AtVip2 are differentially expressed in plant tissues, suggesting non-redundant or non-overlapping functions in plants. These results contribute to our knowledge of inositol phosphate metabolism and will lay a foundation for understanding the role of InsP7 and InsP8 in plants.
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Affiliation(s)
- Mintu Desai
- Department of Plant and Microbial Biology, North Carolina State University, Room 4209, Gardner Hall, Raleigh, NC 27695, USA
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Influence of high temperature during filling period on grain phytic acid and its relation to spikelet sterility and grain weight in non-lethal low phytic acid mutations in rice. J Cereal Sci 2014. [DOI: 10.1016/j.jcs.2014.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Raboy V, Cichy K, Peterson K, Reichman S, Sompong U, Srinives P, Saneoka H. Barley (Hordeum vulgare L.) low phytic acid 1-1: an endosperm-specific, filial determinant of seed total phosphorus. J Hered 2014; 105:656-65. [PMID: 25080466 DOI: 10.1093/jhered/esu044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Inositol hexaphosphate (Ins P6 or "phytic acid") typically accounts for 75 (± 10%) of seed total phosphorus (P). In some cases, genetic blocks in seed Ins P6 accumulation can also alter the distribution or total amount of seed P. In nonmutant barley (Hordeum vulgare L.) caryopses, ~80% of Ins P6 and total P accumulate in the aleurone layer, the outer layer of the endosperm, with the remainder in the germ. In barley low phytic acid 1-1 (Hvlpa1-1) seed, both endosperm Ins P6 and total P are reduced (~45% and ~25%, respectively), but germs are phenotypically wild type. This translates into a net reduction in whole-seed total P of ~15%. Nutrient culture studies demonstrate that the reduction in endosperm total P is not due to a reduction in the uptake of P into the maternal plant. Genetic tests (analyses of testcross and F2 seed) reveal that the Hvlpa1-1 genotype of the filial seed conditions the seed total P reduction; sibling seed in the same head of barley that differ in their Hvlpa1-1 genotype (heterozygous vs. homozygous recessive) differ in their total P (normal vs. reduced, respectively). Therefore, Hvlpa1 functions as a seed-specific or filial determinant of barley endosperm total P.
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Affiliation(s)
- Victor Raboy
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka).
| | - Karen Cichy
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
| | - Kevin Peterson
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
| | - Sarah Reichman
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
| | - Utumporn Sompong
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
| | - Peerasak Srinives
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
| | - Hirofumi Saneoka
- From the USDA Agricultural Research Service, Small Grains and Potato Research Unit, 1691 South 2700 West, Aberdeen, ID 83210 (Raboy, Cichy, Peterson, and Reichman); the Department of Agronomy, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, Thailand (Sompong and Srinives); and the Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan (Saneoka)
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Bhati KK, Aggarwal S, Sharma S, Mantri S, Singh SP, Bhalla S, Kaur J, Tiwari S, Roy JK, Tuli R, Pandey AK. Differential expression of structural genes for the late phase of phytic acid biosynthesis in developing seeds of wheat (Triticum aestivum L.). PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2014; 224:74-85. [PMID: 24908508 DOI: 10.1016/j.plantsci.2014.04.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/28/2014] [Accepted: 04/11/2014] [Indexed: 05/04/2023]
Abstract
In cereals, phytic acid (PA) or inositol hexakisphosphate (IP6) is a well-known phosphate storage compound as well as major chelator of important micronutrients (iron, zinc, calcium, etc.). Genes involved in the late phases of PA biosynthesis pathway are known in crops like maize, soybeans and barley but none have been reported from wheat. Our in silico analysis identified six wheat genes that might be involved in the biosynthesis of inositol phosphates. Four of the genes were inositol tetraphosphate kinases (TaITPK1, TaITPK2, TaITPK3, and TaITPK4), and the other two genes encode for inositol triphosphate kinase (TaIPK2) and inositol pentakisphosphate kinase (TaIPK1). Additionally, we identified a homolog of Zmlpa-1, an ABCC subclass multidrug resistance-associated transporter protein (TaMRP3) that is putatively involved in PA transport. Analyses of the mRNA expression levels of these seven genes showed that they are differentially expressed during seed development, and that some are preferentially expressed in aleurone tissue. These results suggest selective roles during PA biosynthesis, and that both lipid-independent and -dependent pathways are active in developing wheat grains. TaIPK1 and TaMRP3 were able to complement the yeast ScΔipk1 and ScΔycf1 mutants, respectively, providing evidence that the wheat genes have the expected biochemical functions. This is the first comprehensive study of the wheat genes involved in the late phase of PA biosynthesis. Knowledge generated from these studies could be utilized to develop strategies for generating low phyate wheat.
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Affiliation(s)
- Kaushal Kumar Bhati
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Sipla Aggarwal
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Shivani Sharma
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Shrikant Mantri
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Sudhir P Singh
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Sherry Bhalla
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Jagdeep Kaur
- Department of Biotechnology, Panjab University, Punjab, India
| | - Siddharth Tiwari
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Joy K Roy
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Rakesh Tuli
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India
| | - Ajay K Pandey
- National Agri-Food Biotechnology Institute, Department of Biotechnology, Government of India, C-127, Industrial Area, S.A.S. Nagar, Phase 8, Mohali 160071, Punjab, India.
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47
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Yu J, Saiardi A, Greenwood JS, Bewley JD. Molecular and biochemical identification of inositol 1,3,4,5,6-pentakisphosphate 2-kinase encoding mRNA variants in castor bean (Ricinus communis L.) seeds. PLANTA 2014; 239:965-77. [PMID: 24463774 DOI: 10.1007/s00425-014-2028-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 01/09/2014] [Indexed: 06/03/2023]
Abstract
During seed development, phytic acid (PA) associated with mineral cations is stored as phytin and mobilized following germination in support of seedling growth. Two parallel biosynthetic pathways for PA have been proposed; yet the pathway is still poorly understood in terms of its regulation and the enzymes involved. Here, the castor bean (Ricinus communis L.) gene for inositol 1,3,4,5,6-pentakisphosphate 2-kinase (RcIPK1) has been identified. This encodes the enzyme implicated in catalyzing the final reaction in PA biosynthesis, and its expression is enhanced in isolated germinated embryos by application of phosphate and myo-inositol (Ins). Even though only one copy of the RcIPK1 gene is present in the genome, numerous RNA variants are present, most likely due to alternative splicing. These are translated into six closely related protein isoforms according to in silico analysis. Functional analyses using yeast ipk1Δ revealed that only three of the mRNA variants can rescue a temperature-sensitive growth phenotype of this strain. High-performance liquid chromatography (HPLC) analysis of the synthesized inositol phosphates demonstrated that the ability to complement the missing yeast IPK1 enzyme is associated with the production of enzyme activity. The three active isoforms possess unique conserved motifs important for IPK1 catalytic activity.
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MESH Headings
- Base Sequence
- Blotting, Southern
- Ricinus communis/enzymology
- Ricinus communis/genetics
- Ricinus communis/growth & development
- Chromatography, High Pressure Liquid
- Cloning, Molecular
- Computer Simulation
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Plant
- Genes, Plant
- Genetic Complementation Test
- Molecular Sequence Data
- Mutation/genetics
- Phenotype
- Phosphotransferases (Alcohol Group Acceptor)/chemistry
- Phosphotransferases (Alcohol Group Acceptor)/genetics
- Phosphotransferases (Alcohol Group Acceptor)/metabolism
- Phytic Acid/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Saccharomyces cerevisiae/metabolism
- Seeds/enzymology
- Seeds/genetics
- Seeds/growth & development
- Sequence Alignment
- Sequence Analysis, DNA
- Structural Homology, Protein
- Substrate Specificity
- Temperature
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Affiliation(s)
- Jaeju Yu
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
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48
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Eckert C, Offenborn JN, Heinz T, Armarego-Marriott T, Schültke S, Zhang C, Hillmer S, Heilmann M, Schumacher K, Bock R, Heilmann I, Kudla J. The vacuolar calcium sensors CBL2 and CBL3 affect seed size and embryonic development in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 78:146-56. [PMID: 24479654 DOI: 10.1111/tpj.12456] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/14/2014] [Accepted: 01/22/2014] [Indexed: 05/04/2023]
Abstract
Stimulus-specific calcium (Ca(2+) ) signals have crucial functions in developmental processes in many organisms, and are deciphered by various Ca(2+) -binding proteins. In Arabidopsis thaliana, a signaling network consisting of calcineurin B-like (CBL) protein calcium sensors and CBL-interacting protein kinases (CIPKs) has been shown to fulfil pivotal functions at the plasma membrane in regulating ion fluxes and abiotic stress responses. However, the role of tonoplast-localized CBL proteins and especially their function in regulating developmental programs remains largely unknown. In this study, we analyzed single and double mutants of the closely related tonoplast-localized calcium sensors CBL2 and CBL3, which show either reduction of function (rf) or complete loss of function (lf). While single cbl2 or cbl3 mutants did not display discernable phenotypes, cbl2/cbl3 mutants exhibited defects in vegetative growth and were severely impaired in seed development and morphology. Seeds of the cbl2/3rf mutant were smaller in size and exhibited reduced weight and fatty acid content compared to wild-type, but accumulation of sucrose was not altered. Moreover, accumulation of inositol hexakisphosphate (InsP6 ), the major storage form of phosphorus in seeds, was significantly reduced in mutant seeds. In addition, complete loss of CBL2 and CBL3 function in cbl2/3lf resulted in a high frequency of severe defects in embryonic development. Together, our findings reveal a crucial function of Ca(2+) -controlled processes at the vacuolar membrane as determinants of seed yield and size, and demonstrate the importance of vacuolar CBL calcium sensors for plant embryogenesis.
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Affiliation(s)
- Christian Eckert
- Institut für Biologie und Biotechnologie der Pflanzen, Universität Münster, Schlossplatz 4, 48149, Münster, Germany
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Im YJ, Smith CM, Phillippy BQ, Strand D, Kramer DM, Grunden AM, Boss WF. Increasing Phosphatidylinositol (4,5)-Bisphosphate Biosynthesis Affects Basal Signaling and Chloroplast Metabolism in Arabidopsis thaliana. PLANTS (BASEL, SWITZERLAND) 2014; 3:27-57. [PMID: 27135490 PMCID: PMC4844314 DOI: 10.3390/plants3010027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/18/2013] [Accepted: 12/20/2013] [Indexed: 01/26/2023]
Abstract
One challenge in studying the second messenger inositol(1,4,5)-trisphosphate (InsP₃) is that it is present in very low amounts and increases only transiently in response to stimuli. To identify events downstream of InsP₃, we generated transgenic plants constitutively expressing the high specific activity, human phosphatidylinositol 4-phosphate 5-kinase Iα (HsPIPKIα). PIP5K is the enzyme that synthesizes phosphatidylinositol (4,5)-bisphosphate (PtdIns(4,5)P₂); this reaction is flux limiting in InsP₃ biosynthesis in plants. Plasma membranes from transgenic Arabidopsis expressing HsPIPKIα had 2-3 fold higher PIP5K specific activity, and basal InsP₃ levels in seedlings and leaves were >2-fold higher than wild type. Although there was no significant difference in photosynthetic electron transport, HsPIPKIα plants had significantly higher starch (2-4 fold) and 20% higher anthocyanin compared to controls. Starch content was higher both during the day and at the end of dark period. In addition, transcripts of genes involved in starch metabolism such as SEX1 (glucan water dikinase) and SEX4 (phosphoglucan phosphatase), DBE (debranching enzyme), MEX1 (maltose transporter), APL3 (ADP-glucose pyrophosphorylase) and glucose-6-phosphate transporter (Glc6PT) were up-regulated in the HsPIPKIα plants. Our results reveal that increasing the phosphoinositide (PI) pathway affects chloroplast carbon metabolism and suggest that InsP₃ is one component of an inter-organelle signaling network regulating chloroplast metabolism.
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Affiliation(s)
- Yang Ju Im
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Caroline M Smith
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Brian Q Phillippy
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Deserah Strand
- DOE-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.
| | - David M Kramer
- DOE-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA.
| | - Amy M Grunden
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
| | - Wendy F Boss
- Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.
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