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Liang F, Wei S, Ji L, Yan S. A potential CO 2 carrier to improve the utilization of HCO 3- by plant-soil ecosystem for carbon sink enhancement. J Adv Res 2024:S2090-1232(24)00365-5. [PMID: 39154803 DOI: 10.1016/j.jare.2024.08.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 07/19/2024] [Accepted: 08/15/2024] [Indexed: 08/20/2024] Open
Abstract
INTRODUCTION Improving the rhizospheric HCO3- utilization of plant-soil ecosystem could increase the carbon sink effect of terrestrial ecosystem. However, to avoid its physiological stress on the crop growth, the dosage of HCO3- allowed to add into the rhizosphere soil was always low (i.e., <5-20 mol/m3). OBJECTIVES To facilitate the utilization of relatively high concentrations of HCO3- by plants in the pursuit of achieving terrestrial carbon sink enhancement. METHODS In this study, the feasibility of directly supplementing a high concentration HCO3- carried by the biogas slurry to the plant rhizosphere was investigated using the tomato as a model plant. RESULTS The CO2-rich biogas slurry was verified as a potential CO2 carrier to increase the rhizospheric HCO3- concentration to 36 mol/m3 without causing a physiological stress. About 88.3 % of HCO3- carried by biogas slurry was successfully fixed by tomato-soil ecosystem, in which 43.8 % of HCO3- was assimilated by tomato roots for the metabolism, 0.5 ‰ of HCO3- was used by microorganisms for substances synthesis of cell structure through dark fixation, and 44.4 % of HCO3- was retained in the soil. The rest of HCO3- (∼11.7 %) might escape into the atmosphere through the reaction with H+. Correspondingly, the carbon fixation of tomato-soil ecosystem increased by 150.1 g-CO2/m2-soil during a tomato growth cycle. As for the global countries that would adopt the strategy proposed in this study to cultivate the tomato, an extra carbon sink of soil with about 1031.1 kt-C per year (i.e., an additional 0.21 tons of carbon per hectare soil) could be obtained. CONCLUSION This would be consistent with the goal of soil carbon sink enhancement launched at COP21. Furthermore, the regions with low GDP per capita may easily achieve a high reduction potential of CO2 emissions from the agricultural land after adopting the irrigation of CO2-rich biogas slurry.
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Affiliation(s)
- Feihong Liang
- Technology & Equipment Center for Carbon Neutrality in Agriculture, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China; College of Life Science, Yulin University, Yilin 719000, PR China; Division of Soil and Water Management, Department of Earth and Environmental Sciences, KU Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium
| | - Shihui Wei
- Technology & Equipment Center for Carbon Neutrality in Agriculture, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Long Ji
- Technology & Equipment Center for Carbon Neutrality in Agriculture, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Shuiping Yan
- Technology & Equipment Center for Carbon Neutrality in Agriculture, College of Engineering, Huazhong Agricultural University, Wuhan 430070, PR China.
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Somsri A, Chu SH, Nawade B, Lee CY, Park YJ. Harnessing γ-TMT Genetic Variations and Haplotypes for Vitamin E Diversity in the Korean Rice Collection. Antioxidants (Basel) 2024; 13:234. [PMID: 38397832 PMCID: PMC10886147 DOI: 10.3390/antiox13020234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/31/2024] [Accepted: 02/10/2024] [Indexed: 02/25/2024] Open
Abstract
Gamma-tocopherol methyltransferase (γ-TMT), a key gene in the vitamin E biosynthesis pathway, significantly influences the accumulation of tocochromanols, thereby determining rice nutritional quality. In our study, we analyzed the γ-TMT gene in 475 Korean rice accessions, uncovering 177 genetic variants, including 138 SNPs and 39 InDels. Notably, two functional SNPs, tmt-E2-28,895,665-G/A and tmt-E4-28,896,689-A/G, were identified, causing substitutions from valine to isoleucine and arginine to glycine, respectively, across 93 accessions. A positive Tajima's D value in the indica group suggests a signature of balancing selection. Haplotype analysis revealed 27 haplotypes, with two shared between cultivated and wild accessions, seven specific to cultivated accessions, and 18 unique to wild types. Further, profiling of vitamin E isomers in 240 accessions and their association with haplotypes revealed that Hap_2, distinguished by an SNP in the 3' UTR (tmt-3UTR-28,897,360-T/A) exhibited significantly lower α-tocopherol (AT), α-tocotrienol (AT3), total tocopherol, and total tocotrienol, but higher γ-tocopherol (GT) in the japonica group. Additionally, in the indica group, Hap_2 showed significantly higher AT, AT3, and total tocopherol, along with lower GT and γ-tocotrienol, compared to Hap_19, Hap_20, and Hap_21. Overall, this study highlights the genetic landscape of γ-TMT and provides a valuable genetic resource for haplotype-based breeding programs aimed at enhancing nutritional profiles.
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Affiliation(s)
- Aueangporn Somsri
- Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 32439, Republic of Korea; (A.S.); (S.-H.C.); (B.N.)
| | - Sang-Ho Chu
- Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 32439, Republic of Korea; (A.S.); (S.-H.C.); (B.N.)
| | - Bhagwat Nawade
- Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 32439, Republic of Korea; (A.S.); (S.-H.C.); (B.N.)
| | - Chang-Yong Lee
- Department of Industrial and Systems Engineering, College of Engineering, Kongju National University, Cheonan 31080, Republic of Korea;
| | - Yong-Jin Park
- Department of Plant Resources, College of Industrial Sciences, Kongju National University, Yesan 32439, Republic of Korea; (A.S.); (S.-H.C.); (B.N.)
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Sudan J, Urwat U, Farooq A, Pakhtoon MM, Zaffar A, Naik ZA, Batool A, Bashir S, Mansoor M, Sofi PA, Sofi NUR, Shikari AB, Khan MK, Hossain MA, Henry RJ, Zargar SM. Explicating genetic architecture governing nutritional quality in pigmented rice. PeerJ 2023; 11:e15901. [PMID: 37719119 PMCID: PMC10501373 DOI: 10.7717/peerj.15901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 07/25/2023] [Indexed: 09/19/2023] Open
Abstract
Rice is one of the most important staple plant foods that provide a major source of calories and nutrients for tackling the global hunger index especially in developing countries. In terms of nutritional profile, pigmented rice grains are favoured for their nutritional and health benefits. The pigmented rice varieties are rich sources of flavonoids, anthocyanin and proanthocyanidin that can be readily incorporated into diets to help address various lifestyle diseases. However, the cultivation of pigmented rice is limited due to low productivity and unfavourable cooking qualities. With the advances in genome sequencing, molecular breeding, gene expression analysis and multi-omics approaches, various attempts have been made to explore the genetic architecture of rice grain pigmentation. In this review, we have compiled the current state of knowledge of the genetic architecture and nutritional value of pigmentation in rice based upon the available experimental evidence. Future research areas that can help to deepen our understanding and help in harnessing the economic and health benefits of pigmented rice are also explored.
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Affiliation(s)
- Jebi Sudan
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Uneeb Urwat
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Asmat Farooq
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Mohammad Maqbool Pakhtoon
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Aaqif Zaffar
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir (J&K), Srinagar, Jammu and Kashmir, India
| | - Zafir Ahmad Naik
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir (J&K), Srinagar, Jammu and Kashmir, India
| | - Aneesa Batool
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Saika Bashir
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Madeeha Mansoor
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Parvaze A. Sofi
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir (J&K), Srinagar, Jammu and Kashmir, India
| | - Najeebul Ul Rehman Sofi
- Mountain Research Centre for Field Crops, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Khudwani, Jammu and Kashmir, India
| | - Asif B. Shikari
- Division of Genetics and Plant Breeding, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir (J&K), Srinagar, Jammu and Kashmir, India
| | - Mohd. Kamran Khan
- Department of Soil Sciences and Plant Nutrition, Faculty of Agriculture, Selcuk University, Konya, Turkey
| | - Mohammad Anwar Hossain
- Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Robert J. Henry
- Queensland Alliance for Agriculture and Food Innovation, Queensland University, Brisbane, Australia
| | - Sajad Majeed Zargar
- Proteomics Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, Jammu and Kashmir, India
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Huang Q, Lu L, Xu Y, Tu M, Chen X, Jiang L. Genotypic variation of tocopherol content in a representative genetic population and genome-wide association study on tocopherol in rapeseed ( Brassica napus). MOLECULAR BREEDING : NEW STRATEGIES IN PLANT IMPROVEMENT 2023; 43:50. [PMID: 37313221 PMCID: PMC10248655 DOI: 10.1007/s11032-023-01394-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 05/10/2023] [Indexed: 06/15/2023]
Abstract
Tocopherols (Tocs) are a kind of lipid-soluble substance required for the normal physiological function of mammals, particularly their antioxidant capacity. Rapeseed (Brassica napus) oil is an important source of exogenous Tocs. However, the genotypic differences in the total Toc contents, the Toc composition in the seeds, and the molecular markers associated with the seed Toc remain largely unknown. Here, we selected 290 rapeseed accessions based on the resequencing of 991 genomes in a worldwide collection of rapeseed germplasm. The contents of the four Toc isoforms, namely, α-, β-, γ-, and δ-Tocs, were also measured. Results show that the total Toc content and the γ-/α-Toc ratio varied greatly across the accessions from 85.34 to 387.00 mg/mg and 0.65 to 5.03, respectively. Furthermore, we conducted genome-wide association studies on the Tocs, which identified 28 and 73 single nucleotide polymorphisms significantly associated with the variation of total Toc content and γ-/α-Toc ratio, respectively. Bna.C02.VTE4, a putative orthologue of Arabidopsis VITAMIN E DEFICIENT 4, was tightly associated with the γ-/α-Toc ratio. This study recommends specific genetic materials with particularly high total Toc and/or low γ-/α-Toc ratio and the molecular markers and haplotypes associated with these quality traits for rapeseed breeding. Supplementary Information The online version contains supplementary material available at 10.1007/s11032-023-01394-0.
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Affiliation(s)
- Qi Huang
- Institute of Crop Science, Zhejiang University, Yu-Hang-Tang Road 866, Hangzhou, 310058 China
| | - Lingzhi Lu
- Institute of Crop Science, Zhejiang University, Yu-Hang-Tang Road 866, Hangzhou, 310058 China
| | - Ying Xu
- Institute of Crop Science, Zhejiang University, Yu-Hang-Tang Road 866, Hangzhou, 310058 China
| | - Mengxin Tu
- Institute of Crop Science, Zhejiang University, Yu-Hang-Tang Road 866, Hangzhou, 310058 China
| | - Xiaoyang Chen
- Institute of Crop Science, Jinhua Academy of Agricultural Sciences, Shuang-Long Street 828, Jinhua, 321017 China
| | - Lixi Jiang
- Institute of Crop Science, Zhejiang University, Yu-Hang-Tang Road 866, Hangzhou, 310058 China
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Abstract
In contrast to traditional breeding, which relies on the identification of mutants, metabolic engineering provides a new platform to modify the oil composition in oil crops for improved nutrition. By altering endogenous genes involved in the biosynthesis pathways, it is possible to modify edible plant oils to increase the content of desired components or reduce the content of undesirable components. However, introduction of novel nutritional components such as omega-3 long-chain polyunsaturated fatty acids needs transgenic expression of novel genes in crops. Despite formidable challenges, significant progress in engineering nutritionally improved edible plant oils has recently been achieved, with some commercial products now on the market.
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Affiliation(s)
| | - Qing Liu
- CSIRO Agriculture & Food, Canberra, Australia;
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Effect of Overexpression of γ-Tocopherol Methyltransferase on α-Tocopherol and Fatty Acid Accumulation and Tolerance to Salt Stress during Seed Germination in Brassica napus L. Int J Mol Sci 2022; 23:ijms232415933. [PMID: 36555573 PMCID: PMC9784450 DOI: 10.3390/ijms232415933] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Rapeseed (Brassica napus L.) is an important oil crop and a major source of tocopherols, also known as vitamin E, in human nutrition. Enhancing the quality and composition of fatty acids (FAs) and tocopherols in seeds has long been a target for rapeseed breeding. The gene γ-Tocopherol methyltransferase (γ-TMT) encodes an enzyme catalysing the conversion of γ-tocopherol to α-tocopherol, which has the highest biological activity. However, the genetic basis of γ-TMT in B. napus seeds remains unclear. In the present study, BnaC02.TMT.a, one paralogue of Brassica napus γ-TMT, was isolated from the B. napus cultivar "Zhongshuang11" by nested PCR, and two homozygous transgenic overexpression lines were further characterised. Our results demonstrated that the overexpression of BnaC02.TMT.a mediated an increase in the α- and total tocopherol content in transgenic B. napus seeds. Interestingly, the FA composition was also altered in the transgenic plants; a reduction in the levels of oleic acid and an increase in the levels of linoleic acid and linolenic acid were observed. Consistently, BnaC02.TMT.a promoted the expression of BnFAD2 and BnFAD3, which are involved in the biosynthesis of polyunsaturated fatty acids during seed development. In addition, BnaC02.TMT.a enhanced the tolerance to salt stress by scavenging reactive oxygen species (ROS) during seed germination in B. napus. Our results suggest that BnaC02.TMT.a could affect the tocopherol content and FA composition and play a positive role in regulating the rapeseed response to salt stress by modulating the ROS scavenging system. This study broadens our understanding of the function of the Bnγ-TMT gene and provides a novel strategy for genetic engineering in rapeseed breeding.
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7
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Analysis of metabolites of coix seed fermented by Monascus purpureus. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Zhou Z, Li H, Wei R, Li D, Lu W, Weng Z, Yang Z, Guo Y, Lin Y, Chen H. RNA-seq reveals transcriptional differences in anthocyanin and vitamin biosynthetic pathways between black and white rice. Gene X 2022; 844:146845. [PMID: 36038026 DOI: 10.1016/j.gene.2022.146845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 08/08/2022] [Accepted: 08/23/2022] [Indexed: 11/30/2022] Open
Abstract
Anthocyanins and vitamins in black rice are the micronutrients vital to human health, both of which predominantly accumulate in the bran fraction. Some studies have demonstrated that black rice contains more vitamins compared with common white rice, indicating potential association between anthocyanin and vitamin accumulation. In this study, transcriptomes of pericarps collected from 27 black rice accessions and 49 white rice accessions at 10 days after flowering (DAF) were sequenced and analyzed. We identified 830 differentially expressed genes (DEGs) including 58 transcription factors (TFs) between black and white rice. Among 58 differentially expressed transcription factors, OsTTG1 was confirmed to be the one and only WD40 repeat protein regulating anthocyanin biosynthesis in the pericarp. Moreover, we identified 53 differentially expressed synthetic-related genes among 42 main synthesis enzymes in the biosynthesis pathway of seven vitamins including β-carotene, vitamin B1, vitamin B2, vitamin B5, vitamin B7, vitamin B9 and vitamin E. Collectively, our results provide valuable insights into the molecular mechanism of biosynthesis of anthocyanins and vitamins and the potential effect of anthocyanin biosynthesis on vitamin biosynthesis in black rice.
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Affiliation(s)
- Zaihui Zhou
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Han Li
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Ruixue Wei
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Dianwei Li
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Lu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Zijin Weng
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Zenan Yang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Yongmei Guo
- Food Crops Institute, Yunnan Academy of Agricultural Sciences, Kunming, 650205, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Chen
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China.
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Variation in the Content and Composition of Tocols in a Wheat Population. Foods 2022; 11:foods11091343. [PMID: 35564066 PMCID: PMC9105132 DOI: 10.3390/foods11091343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/27/2022] [Accepted: 04/29/2022] [Indexed: 12/10/2022] Open
Abstract
Wheat is a well-known source of B vitamins but also contains significant amounts of vitamin E and related tocols, which have a number of positive health benefits. However, there are no reports on increasing the tocol content of wheat. A prerequisite for increasing the tocol content is the identification of variation in its amount within wheat and related cereals. We therefore determined the tocol content and composition in the grain of 230 recombinant inbred lines (RILs) of a diverse biparental wheat population (Mv Toborzó/Tommi), showing variation in the total content from 13.69 to 45.18 μg/g d.m. The total content also showed transgressive segregation in the population. The effect of the genotype on the variance components of tocols was studied, and the broad-sense heritability was calculated to be 0.71. The lines were also grouped based on their tocol content and analyzed for their chemical composition and breadmaking quality. The high heritability value and the wide variation found in the total amount indicate that increasing the content of tocols is a possible breeding strategy.
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Single nucleotide polymorphisms in oil palm HOMOGENTISATE GERANYL-GERANYL TRANSFERASE promoter for species differentiation and TOCOTRIENOL improvement. Meta Gene 2021. [DOI: 10.1016/j.mgene.2020.100818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Ram H, Gandass N, Sharma A, Singh A, Sonah H, Deshmukh R, Pandey AK, Sharma TR. Spatio-temporal distribution of micronutrients in rice grains and its regulation. Crit Rev Biotechnol 2020; 40:490-507. [DOI: 10.1080/07388551.2020.1742647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hasthi Ram
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Nishu Gandass
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Ankita Sharma
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Anmol Singh
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Humira Sonah
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Rupesh Deshmukh
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Ajay Kumar Pandey
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
| | - Tilak Raj Sharma
- Department of Agri-Biotechnology, National Agri-Food Biotechnology Institute (NABI), Mohali, India
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Bollinedi H, Singh AK, Singh N, S GK, Bhowmick PK, K K V, M N, R K E. Genetic and genomic approaches to address rapid rancidity of rice bran. Crit Rev Food Sci Nutr 2020; 61:75-84. [PMID: 31997650 DOI: 10.1080/10408398.2020.1718598] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Rice bran is an invaluable by-product of paddy processing industry. It is rich in minerals, protein, lipids, and crude fiber. In addition, it also possesses compounds with anti-oxidant, anti-allergic, anti-diabetic, and anti-cancer properties. It forms a basis for the extraction of rice bran oil and preparation of various functional foods with health benefits and potential to prevent chronic health issues. Nevertheless, the rapid deterioration of bran upon storage acts as a major limitation in exploiting the full potential of rice bran. In this review, we have discussed three strategies to address rapid rancidity of rice bran and enhance its shelf life and storability vis-a-vis emphasizing the importance of rice bran in terms of its nutritional composition. One strategy is through exploitation of the null mutations in the genes governing lipases and lipoxygenases leading to nonfunctional enzymes (enzyme deficient approach), another strategy is through reducing the PUFA content that is more prone to oxidation (substrate deficient approach) and a third strategy is through enhancing the antioxidant content that effectively terminate the lipid peroxidation by donating the hydrogen atom.
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Affiliation(s)
- Haritha Bollinedi
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - A K Singh
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - Neha Singh
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - Gopala Krishnan S
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - Prolay K Bhowmick
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - Vinod K K
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
| | - Nagarajan M
- ICAR - IARI and Genetics Research Centre, Aduthurai, Tamil Nadu, India
| | - Ellur R K
- Division of Genetics, ICAR - Indian Agriculture Research Institute (IARI), New Delhi, India
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Strobbe S, De Lepeleire J, Van Der Straeten D. From in planta Function to Vitamin-Rich Food Crops: The ACE of Biofortification. FRONTIERS IN PLANT SCIENCE 2018; 9:1862. [PMID: 30619424 PMCID: PMC6305313 DOI: 10.3389/fpls.2018.01862] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/03/2018] [Indexed: 05/11/2023]
Abstract
Humans are highly dependent on plants to reach their dietary requirements, as plant products contribute both to energy and essential nutrients. For many decades, plant breeders have been able to gradually increase yields of several staple crops, thereby alleviating nutritional needs with varying degrees of success. However, many staple crops such as rice, wheat and corn, although delivering sufficient calories, fail to satisfy micronutrient demands, causing the so called 'hidden hunger.' Biofortification, the process of augmenting nutritional quality of food through the use of agricultural methodologies, is a pivotal asset in the fight against micronutrient malnutrition, mainly due to vitamin and mineral deficiencies. Several technical advances have led to recent breakthroughs. Nutritional genomics has come to fruition based on marker-assisted breeding enabling rapid identification of micronutrient related quantitative trait loci (QTL) in the germplasm of interest. As a complement to these breeding techniques, metabolic engineering approaches, relying on a continuously growing fundamental knowledge of plant metabolism, are able to overcome some of the inevitable pitfalls of breeding. Alteration of micronutrient levels does also require fundamental knowledge about their role and influence on plant growth and development. This review focuses on our knowledge about provitamin A (beta-carotene), vitamin C (ascorbate) and the vitamin E group (tocochromanols). We begin by providing an overview of the functions of these vitamins in planta, followed by highlighting some of the achievements in the nutritional enhancement of food crops via conventional breeding and genetic modification, concluding with an evaluation of the need for such biofortification interventions. The review further elaborates on the vast potential of creating nutritionally enhanced crops through multi-pathway engineering and the synergistic potential of conventional breeding in combination with genetic engineering, including the impact of novel genome editing technologies.
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Sathish S, Preethy KS, Venkatesh R, Sathishkumar R. Rapid enhancement of α-tocopherol content in Nicotiana benthamiana by transient expression of Arabidopsis thaliana Tocopherol cyclase and Homogentisate phytyl transferase genes. 3 Biotech 2018; 8:485. [PMID: 30498659 DOI: 10.1007/s13205-018-1496-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 11/01/2018] [Indexed: 12/18/2022] Open
Abstract
Agrobacterium-mediated transient gene expression have become a method of choice over stable plant genetic transformation. Tocopherols are a family of vitamin E compounds, which are categorized along with tocotrienols occurring naturally in vegetable oils, nuts and leafy green vegetables. This is the first report involving AtTC and AtHPT transient expression in Nicotiana benthamiana and this system can be used efficiently for large scale production of vitamin E. Agroinfiltration studies were carried out in N.benthamiana for the expression of Arabidopsis thaliana (At) genes encoding homogentisate phytyltransferase (HPT) and tocopherol cyclase (TC) individually and in combination (HPT + TC). The transgene presence was analyzed by reverse transcription PCR, which showed the presence of both the vitamin E biosynthetic pathway genes. The gene expression analysis was carried out by (reverse transcription quantitative real-time polymerase chain reaction) RT-qPCR and α-tocopherol content was quantified using high performance liquid chromatography (HPLC). The relative gene expression analysis by RT-qPCR confirmed an increased expression pattern where TC + HPT combination recorded the highest of 231 fold, followed by TC gene with 186 fold, whereas the HPT gene recorded 178 fold. The α-tocopherol content in leaves expressing HPT, TC, and HPT + TC was increased by 4.2, 5.9 and 11.3 fold, respectively, as compared to the control. These results indicate that the transient expression of HPT and TC genes has enhanced the vitamin E levels and stable expression of both A. thaliana genes could be an efficient strategy to enhance vitamin E biosynthesis in agricultural crop breeding.
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Affiliation(s)
- Sundararajan Sathish
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641 046 India
| | - Kuppuraj Sree Preethy
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641 046 India
| | - Rajendran Venkatesh
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641 046 India
| | - Ramalingam Sathishkumar
- Plant Genetic Engineering Laboratory, Department of Biotechnology, Bharathiar University, Coimbatore, 641 046 India
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Zhu C, Kobayashi K, Loladze I, Zhu J, Jiang Q, Xu X, Liu G, Seneweera S, Ebi KL, Drewnowski A, Fukagawa NK, Ziska LH. Carbon dioxide (CO 2) levels this century will alter the protein, micronutrients, and vitamin content of rice grains with potential health consequences for the poorest rice-dependent countries. SCIENCE ADVANCES 2018; 4:eaaq1012. [PMID: 29806023 PMCID: PMC5966189 DOI: 10.1126/sciadv.aaq1012] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 04/06/2018] [Indexed: 05/19/2023]
Abstract
Declines of protein and minerals essential for humans, including iron and zinc, have been reported for crops in response to rising atmospheric carbon dioxide concentration, [CO2]. For the current century, estimates of the potential human health impact of these declines range from 138 million to 1.4 billion, depending on the nutrient. However, changes in plant-based vitamin content in response to [CO2] have not been elucidated. Inclusion of vitamin information would substantially improve estimates of health risks. Among crop species, rice is the primary food source for more than 2 billion people. We used multiyear, multilocation in situ FACE (free-air CO2 enrichment) experiments for 18 genetically diverse rice lines, including Japonica, Indica, and hybrids currently grown throughout Asia. We report for the first time the integrated nutritional impact of those changes (protein, micronutrients, and vitamins) for the 10 countries that consume the most rice as part of their daily caloric supply. Whereas our results confirm the declines in protein, iron, and zinc, we also find consistent declines in vitamins B1, B2, B5, and B9 and, conversely, an increase in vitamin E. A strong correlation between the impacts of elevated [CO2] on vitamin content based on the molecular fraction of nitrogen within the vitamin was observed. Finally, potential health risks associated with anticipated CO2-induced deficits of protein, minerals, and vitamins in rice were correlated to the lowest overall gross domestic product per capita for the highest rice-consuming countries, suggesting potential consequences for a global population of approximately 600 million.
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Affiliation(s)
- Chunwu Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
| | | | - Irakli Loladze
- Bryan College of Health Sciences, Bryan Medical Center, Lincoln, NE 68506, USA
| | - Jianguo Zhu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
| | - Qian Jiang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
| | - Xi Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
| | - Gang Liu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, P. R. China
| | - Saman Seneweera
- Centre for Crop Health, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
| | - Kristie L. Ebi
- Center for Health and the Global Environment (CHanGE), University of Washington, Seattle, WA 98198, USA
| | - Adam Drewnowski
- Center for Public Health Nutrition, University of Washington, Seattle, WA 98195, USA
| | - Naomi K. Fukagawa
- U.S. Department of Agriculture–Agricultural Research Service (USDA-ARS), Beltsville Human Nutrition Center, Beltsville, MD 20705, USA
| | - Lewis H. Ziska
- USDA-ARS, Adaptive Cropping Systems Laboratory, Beltsville, MD 20705, USA
- Corresponding author.
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Hunter CT, Saunders JW, Magallanes-Lundback M, Christensen SA, Willett D, Stinard PS, Li QB, Lee K, DellaPenna D, Koch KE. Maize w3 disrupts homogentisate solanesyl transferase (ZmHst) and reveals a plastoquinone-9 independent path for phytoene desaturation and tocopherol accumulation in kernels. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 93:799-813. [PMID: 29315977 DOI: 10.1111/tpj.13821] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 12/12/2017] [Indexed: 06/07/2023]
Abstract
Maize white seedling 3 (w3) has been used to study carotenoid deficiency for almost 100 years, although the molecular basis of the mutation has remained unknown. Here we show that the w3 phenotype is caused by disruption of the maize gene for homogentisate solanesyl transferase (HST), which catalyzes the first and committed step in plastoquinone-9 (PQ-9) biosynthesis in the plastid. The resulting PQ-9 deficiency prohibits photosynthetic electron transfer and eliminates PQ-9 as an oxidant in the enzymatic desaturation of phytoene during carotenoid synthesis. As a result, light-grown w3 seedlings are albino, deficient in colored carotenoids and accumulate high levels of phytoene. However, despite the absence of PQ-9 for phytoene desaturation, dark-grown w3 seedlings can produce abscisic acid (ABA) and homozygous w3 kernels accumulate sufficient carotenoids to generate ABA needed for seed maturation. The presence of ABA and low levels of carotenoids in w3 nulls indicates that phytoene desaturase is able to use an alternate oxidant cofactor, albeit less efficiently than PQ-9. The observation that tocopherols and tocotrienols are modestly affected in w3 embryos and unaffected in w3 endosperm indicates that, unlike leaves, grain tissues deficient in PQ-9 are not subject to severe photo-oxidative stress. In addition to identifying the molecular basis for the maize w3 mutant, we: (1) show that low levels of phytoene desaturation can occur in w3 seedlings in the absence of PQ-9; and (2) demonstrate that PQ-9 and carotenoids are not required for vitamin E accumulation.
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Affiliation(s)
- Charles T Hunter
- USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, 1700 SW 23rd Dr, Gainesville, FL 32608, USA
| | - Jonathan W Saunders
- University of Florida, Horticultural Sciences, 2550 Hull Rd, Gainesville, FL 32611, USA
| | - Maria Magallanes-Lundback
- Biochemistry and Molecular Biology, Michigan State University, 603 Wilson Rd, East Lansing, MI 48824, USA
| | - Shawn A Christensen
- USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, 1700 SW 23rd Dr, Gainesville, FL 32608, USA
| | - Denis Willett
- USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, 1700 SW 23rd Dr, Gainesville, FL 32608, USA
| | - Philip S Stinard
- USDA-ARS, Maize Genetics Stock Center, 1102 S. Goodwin Ave, Urbana, IL 61801, USA
| | - Qin-Bao Li
- USDA-ARS, Center for Medical, Agricultural and Veterinary Entomology, 1700 SW 23rd Dr, Gainesville, FL 32608, USA
| | - Kwanghee Lee
- University of Connecticut, Plant Science and Landscape Architecture, 1376 Storrs Rd, Storrs, CT 06269, USA
| | - Dean DellaPenna
- Biochemistry and Molecular Biology, Michigan State University, 603 Wilson Rd, East Lansing, MI 48824, USA
| | - Karen E Koch
- University of Florida, Horticultural Sciences, 2550 Hull Rd, Gainesville, FL 32611, USA
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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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18
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BABURA SR, ABDULLAH SNA, KHAZA′AI H. Advances in Genetic Improvement for Tocotrienol Production: A Review. J Nutr Sci Vitaminol (Tokyo) 2017; 63:215-221. [DOI: 10.3177/jnsv.63.215] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Sulaiman Rufai BABURA
- Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra Malaysia
- Department of Plant Biology, Bayero University Kano
| | - Siti Nor Akmar ABDULLAH
- Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra Malaysia
- Laboratory of Plantation Science and Technology, Institute of Plantation Studies, Universiti Putra Malaysia
| | - Huzwah KHAZA′AI
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia
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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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20
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Jiang J, Jia H, Feng G, Wang Z, Li J, Gao H, Wang X. Overexpression of Medicago sativa TMT elevates the α-tocopherol content in Arabidopsis seeds, alfalfa leaves, and delays dark-induced leaf senescence. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 249:93-104. [PMID: 27297993 DOI: 10.1016/j.plantsci.2016.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/05/2016] [Accepted: 05/07/2016] [Indexed: 05/25/2023]
Abstract
Alfalfa (Medicago sativa L.) is a major forage legume for livestock and a target for improving their dietary quality. Vitamin E is an essential vitamin that animals must obtain from their diet for proper growth and development. γ-tocopherol methyltransferase (γ-TMT), which catalyzes the conversion of δ- and γ-tocopherols (or tocotrienols) to β- and α-tocopherols (or tocotrienols), respectively, is the final enzyme involved in the vitamin E biosynthetic pathway. The overexpression of M. sativa L.'s γ-TMT (MsTMT) increased the α-tocopherol content 10-15 fold above that of wild type Arabidopsis seeds without altering the total content of vitamin E. Additionally, in response to osmotic stress, the biomass and the expression levels of several osmotic marker genes were significantly higher in the transgenic lines compared with wild type. Overexpression of MsTMT in alfalfa led to a modest, albeit significant, increase in α-tocopherol in leaves and was also responsible for a delayed leaf senescence phenotype. Additionally, the crude protein content was increased, while the acid and neutral detergent fiber contents were unchanged in these transgenic lines. Thus, increased α-tocopherol content occurred in transgenic alfalfa without compromising the nutritional qualities. The targeted metabolic engineering of vitamin E biosynthesis through MsTMT overexpression provides a promising approach to improve the α-tocopherol content of forage crops.
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Affiliation(s)
- Jishan Jiang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Huili Jia
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Present address: Animal Husbandry and Veterinary institute, Shanxi Academy of Agricultural Sciences, Taiyuan 030032, China
| | - Guangyan Feng
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Present address: Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang 611130, China
| | - Zan Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jun Li
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Present address: Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Huhhot 010020,China
| | - Hongwen Gao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Xuemin Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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21
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Chen D, Li Y, Fang T, Shi X, Chen X. Specific roles of tocopherols and tocotrienols in seed longevity and germination tolerance to abiotic stress in transgenic rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 244:31-9. [PMID: 26810451 DOI: 10.1016/j.plantsci.2015.12.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 12/17/2015] [Accepted: 12/17/2015] [Indexed: 05/27/2023]
Abstract
Tocopherols and tocotrienols are lipophilic antioxidants that are abundant in plant seeds. Although their roles have been extensively studied, our understanding of their functions in rice seeds is still limited. In this study, on the basis of available RNAi rice plants constitutively silenced for homogentisate phytyltransferase (HPT) and tocopherol cyclase (TC), we developed transgenic plants that silenced homogentisate geranylgeranyl transferase (HGGT). All the RNAi plants showed significantly reduced germination percentages and a higher proportion of abnormal seedlings than the control plants, with HGGT transgenics showing the most severe phenotype. The accelerated aging phenotype corresponded well with the amount of H2O2 accumulated in the embryo, glucose level, and ion leakage, but not with the amount of O(2-) accumulated in the embryo and lipid hydroperoxides levels in these genotypes. Under abiotic stress conditions, HPT and TC transgenics showed lower germination percentage and seedling growth than HGGT transgenics, while HGGT transgenics showed almost the same status as the wild type. Therefore, we proposed that tocopherols in the germ may protect the embryo from reactive oxygen species under both accelerated aging and stress conditions, whereas tocotrienols in the pericarp may exclusively help in reducing the metabolic activity of the seed during accelerated aging.
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Affiliation(s)
- Defu Chen
- Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yanlan Li
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Tao Fang
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xiaoli Shi
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Xiwen Chen
- Department of Biochemistry and Molecular Biology, College of Life Sciences, Nankai University, Tianjin 300071, China.
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22
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Birla DS, Malik K, Sainger M, Chaudhary D, Jaiwal R, Jaiwal PK. Progress and challenges in improving the nutritional quality of rice (Oryza sativaL.). Crit Rev Food Sci Nutr 2015; 57:2455-2481. [DOI: 10.1080/10408398.2015.1084992] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Deep Shikha Birla
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Kapil Malik
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Manish Sainger
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Darshna Chaudhary
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Ranjana Jaiwal
- Department of Zoology, Maharshi Dayanand University, Rohtak, India
| | - Pawan K. Jaiwal
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
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23
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Woo HJ, Qin Y, Park SY, Park SK, Cho YG, Shin KS, Lim MH, Cho HS. Development of Selectable Marker-Free Transgenic Rice Plants with Enhanced Seed Tocopherol Content through FLP/FRT-Mediated Spontaneous Auto-Excision. PLoS One 2015; 10:e0132667. [PMID: 26172549 PMCID: PMC4501831 DOI: 10.1371/journal.pone.0132667] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 06/17/2015] [Indexed: 12/16/2022] Open
Abstract
Development of marker-free transgenic plants is a technical alternative for avoiding concerns about the safety of selectable marker genes used in genetically modified (GM) crops. Here, we describe the construction of a spontaneous self-excision binary vector using an oxidative stress-inducible modified FLP/FRT system and its successful application to produce marker-free transgenic rice plants with enhanced seed tocopherol content. To generate selectable marker-free transgenic rice plants, we constructed a binary vector using the hpt selectable marker gene and the rice codon-optimized FLP (mFLP) gene under the control of an oxidative stress-inducible promoter between two FRT sites, along with multiple cloning sites for convenient cloning of genes of interest. Using this pCMF binary vector with the NtTC gene, marker-free T1 transgenic rice plants expressing NtTC were produced by Agrobacterium-mediated stable transformation using hygromycin as a selective agent, followed by segregation of selectable marker genes. Furthermore, α-, γ-, and total tocopherol levels were significantly increased in seeds of the marker-free transgenic TC line compared with those of wild-type plants. Thus, this spontaneous auto-excision system, incorporating an oxidative stress-inducible mFLP/FRT system to eliminate the selectable marker gene, can be easily adopted and used to efficiently generate marker-free transgenic rice plants. Moreover, nutritional enhancement of rice seeds through elevation of tocopherol content coupled with this marker-free strategy may improve human health and public acceptance of GM rice.
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Affiliation(s)
- Hee-Jong Woo
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
- * E-mail:
| | - Yang Qin
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
| | - Soo-Yun Park
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
| | - Soon Ki Park
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Yong-Gu Cho
- Department of Crop Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Kong-Sik Shin
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
| | - Myung-Ho Lim
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
| | - Hyun-Suk Cho
- Biosafety Division, National Academy of Agricultural Science, Rural Development Administration (RDA), Jeonju, Republic of Korea
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24
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Zhang GY, Liu RR, Zhang CQ, Tang KX, Sun MF, Yan GH, Liu QQ. Manipulation of the rice L-galactose pathway: evaluation of the effects of transgene overexpression on ascorbate accumulation and abiotic stress tolerance. PLoS One 2015; 10:e0125870. [PMID: 25938231 PMCID: PMC4418601 DOI: 10.1371/journal.pone.0125870] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 03/26/2015] [Indexed: 01/05/2023] Open
Abstract
Ascorbic acid (AsA) is the most abundant water-soluble antioxidant in plants, and it plays a crucial role in plant growth, development and abiotic stress tolerance. In the present study, six key Arabidopsis or rapeseed genes involved in AsA biosynthesis were constitutively overexpressed in an elite Japonica rice cultivar. These genes encoded the GDP-mannose pyrophosphorylase (GMP), GDP-mannose-3',5'-epimerase (GME), GDP-L-galactose phosphorylase (GGP), L-galactose-1-phosphate phosphatase (GPP), L-galactose dehydrogenase (GDH), and L-galactono-1,4-lactone dehydrogenase (GalLDH). The effects of transgene expression on rice leaf AsA accumulation were carefully evaluated. In homozygous transgenic seedlings, AtGGP transgenic lines had the highest AsA contents (2.55-fold greater than the empty vector transgenic control), followed by the AtGME and AtGDH transgenic lines. Moreover, with the exception of the AtGPP lines, the increased AsA content also provoked an increase in the redox state (AsA/DHA ratio). To evaluate salt tolerance, AtGGP and AtGME transgenic seedlings were exposed to salt stress for one week. The relative plant height, root length and fresh weight growth rates were significantly higher for the transgenic lines compared with the control plants. Altogether, our results suggest that GGP may be a key rate-limiting step in rice AsA biosynthesis, and the plants with elevated AsA contents demonstrated enhanced tolerance for salt stress.
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Affiliation(s)
- Gui-Yun Zhang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
- Agricultural Science Institute of Coastal Region of Jiangsu, Yancheng 224002, Jiangsu, China
| | - Ru-Ru Liu
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
| | - Chang-Quan Zhang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
| | - Ke-Xuan Tang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ming-Fa Sun
- Agricultural Science Institute of Coastal Region of Jiangsu, Yancheng 224002, Jiangsu, China
| | - Guo-Hong Yan
- Agricultural Science Institute of Coastal Region of Jiangsu, Yancheng 224002, Jiangsu, China
| | - Qiao-Quan Liu
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, Jiangsu, China
- * E-mail:
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26
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Farré G, Blancquaert D, Capell T, Van Der Straeten D, Christou P, Zhu C. Engineering complex metabolic pathways in plants. ANNUAL REVIEW OF PLANT BIOLOGY 2014; 65:187-223. [PMID: 24579989 DOI: 10.1146/annurev-arplant-050213-035825] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Metabolic engineering can be used to modulate endogenous metabolic pathways in plants or introduce new metabolic capabilities in order to increase the production of a desirable compound or reduce the accumulation of an undesirable one. In practice, there are several major challenges that need to be overcome, such as gaining enough knowledge about the endogenous pathways to understand the best intervention points, identifying and sourcing the most suitable metabolic genes, expressing those genes in such a way as to produce a functional enzyme in a heterologous background, and, finally, achieving the accumulation of target compounds without harming the host plant. This article discusses the strategies that have been developed to engineer complex metabolic pathways in plants, focusing on recent technological developments that allow the most significant bottlenecks to be overcome.
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Affiliation(s)
- Gemma Farré
- Departament de Producció Vegetal i Ciència Forestal, Universitat de Lleida, Agrotecnio Center, 25198 Lleida, Spain;
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Zhang L, Luo Y, Zhu Y, Zhang L, Zhang W, Chen R, Xu M, Fan Y, Wang L. GmTMT2a from soybean elevates the α-tocopherol content in corn and Arabidopsis. Transgenic Res 2013; 22:1021-8. [PMID: 23645501 DOI: 10.1007/s11248-013-9713-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Accepted: 04/25/2013] [Indexed: 01/09/2023]
Abstract
Tocochromanol, or vitamin E, plays a crucial role in human and animal nutrition and is synthesized only by photosynthetic organisms. γ-Tocopherol methyltransferase (γ-TMT), one of the key enzymes in the tocopherol biosynthetic pathway in plants, converts γ, δ-tocopherols into α-, β-tocopherols. Tocopherol content was investigated in 15 soybean cultivars and GmTMT2 was isolated from five varieties based on tocopherol content. GmTMT2a was expressed in E. coli and the purified protein effectively converted γ-tocopherol into α-tocopherol in vitro. Overexpression of GmTMT2a enhanced α-tocopherol content 4-6-fold in transgenic Arabidopsis, and α-tocopherol content increased 3-4.5-fold in transgenic maize seed, which correlated with the accumulation of GmTMT2a. Transgenic corn that is α-tocopherol-rich may be beneficial for animal health and growth.
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Affiliation(s)
- Lan Zhang
- Biotechnology Research Institute, National Key Facility of Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
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Zhou Y, Gong Z, Yang Z, Yuan Y, Zhu J, Wang M, Yuan F, Wu S, Wang Z, Yi C, Xu T, Ryom M, Gu M, Liang G. Mutation of the light-induced yellow leaf 1 gene, which encodes a geranylgeranyl reductase, affects chlorophyll biosynthesis and light sensitivity in rice. PLoS One 2013; 8:e75299. [PMID: 24058671 PMCID: PMC3769248 DOI: 10.1371/journal.pone.0075299] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/14/2013] [Indexed: 01/28/2023] Open
Abstract
Chlorophylls (Chls) are crucial for capturing light energy for photosynthesis. Although several genes responsible for Chl biosynthesis were characterized in rice (Oryza sativa), the genetic properties of the hydrogenating enzyme involved in the final step of Chl synthesis remain unknown. In this study, we characterized a rice light-induced yellow leaf 1-1 (lyl1-1) mutant that is hypersensitive to high-light and defective in the Chl synthesis. Light-shading experiment suggested that the yellowing of lyl1-1 is light-induced. Map-based cloning of LYL1 revealed that it encodes a geranylgeranyl reductase. The mutation of LYL1 led to the majority of Chl molecules are conjugated with an unsaturated geranylgeraniol side chain. LYL1 is the firstly defined gene involved in the reduction step from Chl-geranylgeranylated (Chl(GG)) and geranylgeranyl pyrophosphate (GGPP) to Chl-phytol (Chl(Phy)) and phytyl pyrophosphate (PPP) in rice. LYL1 can be induced by light and suppressed by darkness which is consistent with its potential biological functions. Additionally, the lyl1-1 mutant suffered from severe photooxidative damage and displayed a drastic reduction in the levels of α-tocopherol and photosynthetic proteins. We concluded that LYL1 also plays an important role in response to high-light in rice.
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Affiliation(s)
- Yong Zhou
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zhiyun Gong
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zefeng Yang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yuan Yuan
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jinyan Zhu
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, China
| | - Man Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Fuhai Yuan
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Shujun Wu
- Shanghai Academy of Agricultural Sciences, Shanghai, China
| | - Zhiqin Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Chuandeng Yi
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Tinghua Xu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - MyongChol Ryom
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Minghong Gu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
| | - Guohua Liang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Key Laboratory of the Ministry of Education for Plant Functional Genomics, Yangzhou University, Yangzhou, Jiangsu, China
- * E-mail:
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