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Mohsin S, Irfan M, Saeed A, Malik KA, Maqbool A. Enhanced expression of PDX1 accumulates vitamin B6 in transgenic wheat seeds. J Cereal Sci 2022. [DOI: 10.1016/j.jcs.2022.103502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mangel N, Fudge JB, Gruissem W, Fitzpatrick TB, Vanderschuren H. Natural Variation in Vitamin B 1 and Vitamin B 6 Contents in Rice Germplasm. FRONTIERS IN PLANT SCIENCE 2022; 13:856880. [PMID: 35444674 PMCID: PMC9014206 DOI: 10.3389/fpls.2022.856880] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 02/24/2022] [Indexed: 05/03/2023]
Abstract
Insufficient dietary intake of micronutrients contributes to the onset of deficiencies termed hidden hunger-a global health problem affecting approximately 2 billion people. Vitamin B1 (thiamine) and vitamin B6 (pyridoxine) are essential micronutrients because of their roles as enzymatic cofactors in all organisms. Metabolic engineering attempts to biofortify rice endosperm-a poor source of several micronutrients leading to deficiencies when consumed monotonously-have led to only minimal improvements in vitamin B1 and B6 contents. To determine if rice germplasm could be exploited for biofortification of rice endosperm, we screened 59 genetically diverse accessions under greenhouse conditions for variation in vitamin B1 and vitamin B6 contents across three tissue types (leaves, unpolished and polished grain). Accessions from low, intermediate and high vitamin categories that had similar vitamin levels in two greenhouse experiments were chosen for in-depth vitamer profiling and selected biosynthesis gene expression analyses. Vitamin B1 and B6 contents in polished seeds varied almost 4-fold. Genes encoding select vitamin B1 and B6 biosynthesis de novo enzymes (THIC for vitamin B1, PDX1.3a-c and PDX2 for vitamin B6) were differentially expressed in leaves across accessions contrasting in their respective vitamin contents. These expression levels did not correlate with leaf and unpolished seed vitamin contents, except for THIC expression in leaves that was positively correlated with total vitamin B1 contents in polished seeds. This study expands our knowledge of diversity in micronutrient traits in rice germplasm and provides insights into the expression of genes for vitamin B1 and B6 biosynthesis in rice.
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Affiliation(s)
- Nathalie Mangel
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Jared B. Fudge
- Vitamin & Environmental Stress Responses in Plants, Department of Botany and Plant Biology, Université de Genève, Geneva, Switzerland
| | - Wilhelm Gruissem
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland
- Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
- *Correspondence: Wilhelm Gruissem,
| | - Teresa B. Fitzpatrick
- Vitamin & Environmental Stress Responses in Plants, Department of Botany and Plant Biology, Université de Genève, Geneva, Switzerland
- Teresa B. Fitzpatrick,
| | - Hervé Vanderschuren
- Plant Biotechnology, Department of Biology, ETH Zurich, Zurich, Switzerland
- Plant Genetics Laboratory, TERRA Teaching and Research Center, Gembloux Agro-Bio Tech, Université de Liège, Gembloux, Belgium
- Hervé Vanderschuren,
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Hellmann H, Goyer A, Navarre DA. Antioxidants in Potatoes: A Functional View on One of the Major Food Crops Worldwide. Molecules 2021; 26:2446. [PMID: 33922183 PMCID: PMC8122721 DOI: 10.3390/molecules26092446] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/07/2021] [Accepted: 04/19/2021] [Indexed: 12/14/2022] Open
Abstract
With a growing world population, accelerating climate changes, and limited arable land, it is critical to focus on plant-based resources for sustainable food production. In addition, plants are a cornucopia for secondary metabolites, of which many have robust antioxidative capacities and are beneficial for human health. Potato is one of the major food crops worldwide, and is recognized by the United Nations as an excellent food source for an increasing world population. Potato tubers are rich in a plethora of antioxidants with an array of health-promoting effects. This review article provides a detailed overview about the biosynthesis, chemical and health-promoting properties of the most abundant antioxidants in potato tubers, including several vitamins, carotenoids and phenylpropanoids. The dietary contribution of diverse commercial and primitive cultivars are detailed and document that potato contributes much more than just complex carbohydrates to the diet. Finally, the review provides insights into the current and future potential of potato-based systems as tools and resources for healthy and sustainable food production.
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Affiliation(s)
- Hanjo Hellmann
- School of Biological Sciences, Washington State University, Pullman, WA 99164, USA
| | - Aymeric Goyer
- Hermiston Agricultural Research and Extension Center, Department of Botany and Plant Pathology, Oregon State University, Hermiston, OR 97838, USA;
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Zhu Q, Wang B, Tan J, Liu T, Li L, Liu YG. Plant Synthetic Metabolic Engineering for Enhancing Crop Nutritional Quality. PLANT COMMUNICATIONS 2020; 1:100017. [PMID: 33404538 PMCID: PMC7747972 DOI: 10.1016/j.xplc.2019.100017] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 12/05/2019] [Accepted: 12/17/2019] [Indexed: 05/08/2023]
Abstract
Nutrient deficiencies in crops are a serious threat to human health, especially for populations in poor areas. To overcome this problem, the development of crops with nutrient-enhanced traits is imperative. Biofortification of crops to improve nutritional quality helps combat nutrient deficiencies by increasing the levels of specific nutrient components. Compared with agronomic practices and conventional plant breeding, plant metabolic engineering and synthetic biology strategies are more effective and accurate in synthesizing specific micronutrients, phytonutrients, and/or bioactive components in crops. In this review, we discuss recent progress in the field of plant synthetic metabolic engineering, specifically in terms of research strategies of multigene stacking tools and engineering complex metabolic pathways, with a focus on improving traits related to micronutrients, phytonutrients, and bioactive components. Advances and innovations in plant synthetic metabolic engineering would facilitate the development of nutrient-enriched crops to meet the nutritional needs of humans.
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Affiliation(s)
- Qinlong Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Bin Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Jiantao Tan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Taoli Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Li Li
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY 14850, USA
- Plant Breeding and Genetics Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14850, USA
| | - Yao-Guang Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources; College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- Corresponding author
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Mangel N, Fudge JB, Li K, Wu T, Tohge T, Fernie AR, Szurek B, Fitzpatrick TB, Gruissem W, Vanderschuren H. Enhancement of vitamin B 6 levels in rice expressing Arabidopsis vitamin B 6 biosynthesis de novo genes. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 99:1047-1065. [PMID: 31063672 PMCID: PMC6852651 DOI: 10.1111/tpj.14379] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 03/19/2019] [Accepted: 04/10/2019] [Indexed: 05/06/2023]
Abstract
Vitamin B6 (pyridoxine) is vital for key metabolic reactions and reported to have antioxidant properties in planta. Therefore, enhancement of vitamin B6 content has been hypothesized to be a route to improve resistance to biotic and abiotic stresses. Most of the current studies on vitamin B6 in plants are on eudicot species, with monocots remaining largely unexplored. In this study, we investigated vitamin B6 biosynthesis in rice, with a view to examining the feasibility and impact of enhancing vitamin B6 levels. Constitutive expression in rice of two Arabidopsis thaliana genes from the vitamin B6 biosynthesis de novo pathway, AtPDX1.1 and AtPDX2, resulted in a considerable increase in vitamin B6 in leaves (up to 28.3-fold) and roots (up to 12-fold), with minimal impact on general growth. Rice lines accumulating high levels of vitamin B6 did not display enhanced tolerance to abiotic stress (salt) or biotic stress (resistance to Xanthomonas oryzae infection). While a significant increase in vitamin B6 content could also be achieved in rice seeds (up to 3.1-fold), the increase was largely due to its accumulation in seed coat and embryo tissues, with little enhancement observed in the endosperm. However, seed yield was affected in some vitamin B6 -enhanced lines. Notably, expression of the transgenes did not affect the expression of the endogenous rice PDX genes. Intriguingly, despite transgene expression in leaves and seeds, the corresponding proteins were only detectable in leaves and could not be observed in seeds, possibly pointing to a mode of regulation in this organ.
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Affiliation(s)
- Nathalie Mangel
- Plant Biotechnology, Department of BiologyETH ZürichZürichSwitzerland
| | - Jared B. Fudge
- Department of Botany and Plant BiologyUniversity of GenevaGeneva1211Switzerland
| | - Kuan‐Te Li
- Plant Biotechnology, Department of BiologyETH ZürichZürichSwitzerland
| | - Ting‐Ying Wu
- Plant Biotechnology, Department of BiologyETH ZürichZürichSwitzerland
| | - Takayuki Tohge
- Max‐Planck‐Institute for Molecular Plant PhysiologyPotsdam‐Gölm14476Germany
- Present address:
Graduate School of Biological SciencesNara Institute of Science and TechnologyIkomaNara630‐0192Japan
| | - Alisdair R. Fernie
- Max‐Planck‐Institute for Molecular Plant PhysiologyPotsdam‐Gölm14476Germany
| | - Boris Szurek
- IRDCiradUniversity of MontpellierIPMEMontpellier34394France
| | | | - Wilhelm Gruissem
- Plant Biotechnology, Department of BiologyETH ZürichZürichSwitzerland
- Advanced Plant Biotechnology CenterNational Chung Hsing UniversityTaichung City40227Taiwan
| | - Hervé Vanderschuren
- Plant Biotechnology, Department of BiologyETH ZürichZürichSwitzerland
- Plant Genetics LabTERRA Research and Teaching CentreGembloux Agro BioTechUniversity of LiègeGembloux5030Belgium
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Bagri DS, Upadhyaya DC, Kumar A, Upadhyaya CP. Overexpression of PDX-II gene in potato (Solanum tuberosum L.) leads to the enhanced accumulation of vitamin B6 in tuber tissues and tolerance to abiotic stresses. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 272:267-275. [PMID: 29807600 DOI: 10.1016/j.plantsci.2018.04.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/24/2018] [Accepted: 04/28/2018] [Indexed: 05/21/2023]
Abstract
Vitamin B6 is a vital metabolite required for living organisms as a cofactor in several metabolic biochemical reactions and recognized as a potent antioxidant molecule which modulates the expression of the proteins responsible for the scavenging of cellular reactive oxygen species. It is well established that the microorganisms and plants can synthesize the B6 de novo, therefore, all the animals including humans must acquire it from the plant dietary resources. However, the bioavailability of the vitamin in the edible portions of the commonly consumed plants is insufficient to meet the daily recommended doses. Genetic engineering techniques have proven successful in increasing the vitamin B6 content in the model plants. Present study describe the development of transgenic potato (Solanum tuberosum L. cv. Kufri chipsona) overexpressing key vitamin B6 pathway gene, the PDXII (NCBI database Ref. ID- NM_125447.2) isolated from Arabidopsis thaliana under the control of CaMV 35S constitutive promoter. The stable integration and expression of transgene in the transgenic lines were confirmed by PCR, Southern blot and RT-PCR analysis. Transgenic tubers exhibited considerably improved vitamin B6 accumulation (up to 107-150%) in comparison to the untransformed controls potato. This increase in vitamin B6 was also correlated with the increased mRNA expression of PDXII gene. The prominent increase in the B6 content of transgenic potato was also associated with the capability to survive under abiotic stresses, therefore, the transgenic lines were able to withstand various abiotic stresses imposed by salinity (NaCl) or methyl viologen (MV). We thus demonstrated that overexpression of PDXII gene under the control of a constitutive promoter enhanced the accumulation of the vitamin B6 which also augmented the tolerance under various abiotic stresses in potato (Solanum tuberosum L.).
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Affiliation(s)
- Deepak Singh Bagri
- Plant Molecular Biology Laboratory, Department of Biotechnology, Dr Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India
| | - Devanshi Chandel Upadhyaya
- Plant Molecular Biology Laboratory, Department of Biotechnology, Dr Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India
| | - Ashwani Kumar
- Metagenomics and Secretomics Research laboratory, Department of Botany, Dr Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India
| | - Chandrama Prakash Upadhyaya
- Plant Molecular Biology Laboratory, Department of Biotechnology, Dr Harisingh Gour Central University, Sagar, 470003, Madhya Pradesh, India.
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Fudge J, Mangel N, Gruissem W, Vanderschuren H, Fitzpatrick TB. Rationalising vitamin B6 biofortification in crop plants. Curr Opin Biotechnol 2017; 44:130-137. [DOI: 10.1016/j.copbio.2016.12.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/17/2016] [Accepted: 12/19/2016] [Indexed: 12/31/2022]
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Jiang L, Wang W, Lian T, Zhang C. Manipulation of Metabolic Pathways to Develop Vitamin-Enriched Crops for Human Health. FRONTIERS IN PLANT SCIENCE 2017; 8:937. [PMID: 28634484 PMCID: PMC5460589 DOI: 10.3389/fpls.2017.00937] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 05/19/2017] [Indexed: 05/22/2023]
Abstract
Vitamin deficiencies are major forms of micronutrient deficiencies, and are associated with huge economic losses as well as severe physical and intellectual damages to humans. Much evidence has demonstrated that biofortification plays an important role in combating vitamin deficiencies due to its economical and effective delivery of nutrients to populations in need. Biofortification enables food plants to be enriched with vitamins through conventional breeding and/or biotechnology. Here, we focus on the progress in the manipulation of the vitamin metabolism, an essential part of biofortification, by the genetic modification or by the marker-assisted selection to understand mechanisms underlying metabolic improvement in food plants. We also propose to integrate new breeding technologies with metabolic pathway modification to facilitate biofortification in food plants and, thereby, to benefit human health.
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Affiliation(s)
- Ling Jiang
- Biotechnology Research Institute, Chinese Academy of Agricultural SciencesBeijing, China
- National Key Facility for Crop Gene Resources and Genetic ImprovementBeijing, China
- *Correspondence: Ling Jiang, Chunyi Zhang,
| | - Weixuan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural SciencesBeijing, China
- National Key Facility for Crop Gene Resources and Genetic ImprovementBeijing, China
| | - Tong Lian
- Biotechnology Research Institute, Chinese Academy of Agricultural SciencesBeijing, China
| | - Chunyi Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural SciencesBeijing, China
- National Key Facility for Crop Gene Resources and Genetic ImprovementBeijing, China
- *Correspondence: Ling Jiang, Chunyi Zhang,
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Blancquaert D, De Steur H, Gellynck X, Van Der Straeten D. Metabolic engineering of micronutrients in crop plants. Ann N Y Acad Sci 2016; 1390:59-73. [DOI: 10.1111/nyas.13274] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 09/01/2016] [Accepted: 09/16/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Dieter Blancquaert
- Laboratory of Functional Plant Biology, Department of Physiology; Ghent University; Ghent Belgium
| | - Hans De Steur
- Division Agri-Food Marketing & Chain Management, Department of Agricultural Economics; Ghent University; Ghent Belgium
| | - Xavier Gellynck
- Division Agri-Food Marketing & Chain Management, Department of Agricultural Economics; Ghent University; Ghent Belgium
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Li KT, Moulin M, Mangel N, Albersen M, Verhoeven-Duif NM, Ma Q, Zhang P, Fitzpatrick TB, Gruissem W, Vanderschuren H. Increased bioavailable vitamin B6 in field-grown transgenic cassava for dietary sufficiency. Nat Biotechnol 2015; 33:1029-32. [DOI: 10.1038/nbt.3318] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bhullar NK, Gruissem W. Nutritional enhancement of rice for human health: the contribution of biotechnology. Biotechnol Adv 2012; 31:50-7. [PMID: 22343216 DOI: 10.1016/j.biotechadv.2012.02.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 01/25/2012] [Accepted: 02/01/2012] [Indexed: 11/19/2022]
Abstract
Micronutrient malnutrition is widespread, especially in poor populations across the globe where daily caloric intake is confined mainly to staple cereals. Rice, which is a staple food for over half of the world's population, is low in bioavailable micronutrients required for the daily diet. Improvements of the plant-based diets are therefore critical and of high economic value in order to achieve a healthy nutrition of a large segment of the human population. Rice grain biofortification has emerged as a strategic priority for alleviation of micronutrient malnutrition. Nutritional enhancement of crops through conventional breeding is often limited by the low genetic variability for required dietary micronutrient levels. In this case, biotechnology strategies offer effective and efficient perspectives. In this review, we discuss genetic engineering approaches that have been successful in the nutritional enhancement of rice endosperm. These advancements will make substantial contributions to crop improvement and human nutrition. Their practical application, however, also demands visionary changes in regulatory policies and a broader consumer acceptance.
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Affiliation(s)
- Navreet K Bhullar
- Department of Biology, Plant Biotechnology, ETH Zurich, Universitätstrasse 2, 8092 Zurich, Switzerland.
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Raschke M, Boycheva S, Crèvecoeur M, Nunes-Nesi A, Witt S, Fernie AR, Amrhein N, Fitzpatrick TB. Enhanced levels of vitamin B(6) increase aerial organ size and positively affect stress tolerance in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2011; 66:414-32. [PMID: 21241390 DOI: 10.1111/j.1365-313x.2011.04499.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Vitamin B₆ is an essential nutrient in the human diet derived primarily from plant sources. While it is well established as a cofactor for numerous metabolic enzymes, more recently, vitamin B₆ has been implicated as a potent antioxidant. The de novo vitamin B₆ biosynthesis pathway in plants has recently been unraveled and involves only two proteins, PDX1 and PDX2. To provide more insight into the effect of the compound on plant development and its role as an antioxidant, we have overexpressed the PDX proteins in Arabidopsis, generating lines with considerably higher levels of the vitamin in comparison with other recent attempts to achieve this goal. Interestingly, it was possible to increase the level of only one of the two catalytically active PDX1 proteins at the protein level, providing insight into the mechanism of vitamin B₆ homeostasis in planta. Vitamin B₆ enhanced lines have considerably larger vegetative and floral organs and although delayed in pre-reproductive development, do not have an altered overall morphology. The vitamin was observed to accumulate in seeds and the enhancement of its levels was correlated with an increase in their size and weight. This phenotype is predominantly a consequence of embryo enlargement as reflected by larger cells. Furthermore, plants that overaccumulate the vitamin have an increased tolerance to oxidative stress providing in vivo evidence for the antioxidant functionality of vitamin B₆. In particular, the plants show an increased resistance to paraquat and photoinhibition, and they attenuate the cell death response observed in the conditional flu mutant.
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Affiliation(s)
- Maja Raschke
- ETH Zurich, Institute of Plant Sciences, 8092 Zurich, Switzerland
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Leuendorf JE, Osorio S, Szewczyk A, Fernie AR, Hellmann H. Complex assembly and metabolic profiling of Arabidopsis thaliana plants overexpressing vitamin B₆ biosynthesis proteins. MOLECULAR PLANT 2010; 3:890-903. [PMID: 20675613 DOI: 10.1093/mp/ssq041] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In plants, vitamin B₆ biosynthesis requires the activity of PDX1 and PDX2 proteins. Arabidopsis thaliana encodes for three PDX1 proteins, named PDX1.1, 1.2, and 1.3, but only one PDX2. Here, we show in planta complex assembly of PDX proteins, based on split-YFP and FPLC assays, and can demonstrate their presence in higher complexes of around 750 kDa. Metabolic profiling of plants ectopically expressing the different PDX proteins indicates a negative influence of PDX1.2 on vitamin B₆ biosynthesis and a correlation between aberrant vitamin B6 content, PDX1 gene expression, and light sensitivity specifically for PDX1.3. These findings provide first insights into in planta vitamin B₆ synthase complex assembly and new information on how the different PDX proteins affect plant metabolism.
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Mooney S, Hellmann H. Vitamin B6: Killing two birds with one stone? PHYTOCHEMISTRY 2010; 71:495-501. [PMID: 20089286 DOI: 10.1016/j.phytochem.2009.12.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 12/23/2009] [Accepted: 12/30/2009] [Indexed: 05/24/2023]
Abstract
Vitamin B6 comprises a group of compounds that are involved in a surprisingly high diversity of biochemical reactions. Actually, most of these reactions are co-catalyzed by a single B6 vitamer, pyridoxal 5'-phosphate, making it a crucial and versatile co-factor in many metabolic processes in the cell. In addition, it has been demonstrated in recent years that vitamin B6 has a second important function by being an effective antioxidant. Because of these two characteristics the vitamin is an interesting compound to study in plants. This review provides a brief overview and update on such important aspects like vitamin B6-dependent enzymes and known biosynthetic pathways in plants, phenotypes of plant mutants affected in vitamin B6 biosynthesis, and the potential benefits of modifying vitamin B6 content in plants.
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Affiliation(s)
- Sutton Mooney
- Washington State University, Pullman, Abelson Hall, WA 99164, USA
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