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Kumar T, Wang JG, Xu CH, Lu X, Mao J, Lin XQ, Kong CY, Li CJ, Li XJ, Tian CY, Ebid MHM, Liu XL, Liu HB. Genetic Engineering for Enhancing Sugarcane Tolerance to Biotic and Abiotic Stresses. PLANTS (BASEL, SWITZERLAND) 2024; 13:1739. [PMID: 38999579 PMCID: PMC11244436 DOI: 10.3390/plants13131739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 06/18/2024] [Accepted: 06/18/2024] [Indexed: 07/14/2024]
Abstract
Sugarcane, a vital cash crop, contributes significantly to the world's sugar supply and raw materials for biofuel production, playing a significant role in the global sugar industry. However, sustainable productivity is severely hampered by biotic and abiotic stressors. Genetic engineering has been used to transfer useful genes into sugarcane plants to improve desirable traits and has emerged as a basic and applied research method to maintain growth and productivity under different adverse environmental conditions. However, the use of transgenic approaches remains contentious and requires rigorous experimental methods to address biosafety challenges. Clustered regularly interspaced short palindromic repeat (CRISPR) mediated genome editing technology is growing rapidly and may revolutionize sugarcane production. This review aims to explore innovative genetic engineering techniques and their successful application in developing sugarcane cultivars with enhanced resistance to biotic and abiotic stresses to produce superior sugarcane cultivars.
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Affiliation(s)
- Tanweer Kumar
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
- Sugar Crops Research Institute, Agriculture, Fisheries and Co-Operative Department, Charsadda Road, Mardan 23210, Khyber Pakhtunkhwa, Pakistan
| | - Jun-Gang Wang
- National Key Laboratory for Tropical Crop Breeding, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Sanya 572024, China
| | - Chao-Hua Xu
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Xin Lu
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Jun Mao
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Xiu-Qin Lin
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Chun-Yan Kong
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Chun-Jia Li
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Xu-Juan Li
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Chun-Yan Tian
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Mahmoud H. M. Ebid
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
- Sugar Crops Research Institute, Agricultural Research Center, Giza 12619, Egypt
| | - Xin-Long Liu
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
| | - Hong-Bo Liu
- National Key Laboratory for Tropical Crop Breeding, Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Yunnan Key Laboratory of Sugarcane Genetic Improvement, Kaiyuan 661699, China; (T.K.)
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Verma KK, Song XP, Budeguer F, Nikpay A, Enrique R, Singh M, Zhang BQ, Wu JM, Li YR. Genetic engineering: an efficient approach to mitigating biotic and abiotic stresses in sugarcane cultivation. PLANT SIGNALING & BEHAVIOR 2022; 17:2108253. [PMID: 35959678 PMCID: PMC9377231 DOI: 10.1080/15592324.2022.2108253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/27/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
Abiotic stresses are the foremost limiting factors for crop productivity. Crop plants need to cope with adverse external pressure caused by various environmental conditions with their intrinsic biological mechanisms to keep their growth, development, and productivity. Climate-resilient, high-yielding crops need to be developed to maintain sustainable food supply. Over the last decade, understanding of the genetic complexity of agronomic traits in sugarcane has prompted the integrated application of genetic engineering to address specific biological questions. Genes for adaptation to environmental stress and yield enhancement traits are being determined and introgressed to develop elite sugarcane cultivars with improved characteristics through genetic engineering approaches. Here, we discuss the advancement to provide a reference for future sugarcane (Saccharum spp.) genetic engineering.
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Affiliation(s)
- Krishan K. Verma
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/ Sugarcane Research Center, Chinese Academy of Agricultural Sciences/ Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/ Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, China
| | - Xiu-Peng Song
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/ Sugarcane Research Center, Chinese Academy of Agricultural Sciences/ Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/ Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, China
| | - Florencia Budeguer
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estacion Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Amin Nikpay
- Department of Plant Protection, Sugarcane and By-Products Development Company, Salman Farsi Agroindustry, AhwazIran
| | - Ramon Enrique
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estacion Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Munna Singh
- Department of Botany, University of Lucknow, Lucknow–India
| | - Bao-Qing Zhang
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/ Sugarcane Research Center, Chinese Academy of Agricultural Sciences/ Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/ Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, China
| | - Jian-Ming Wu
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/ Sugarcane Research Center, Chinese Academy of Agricultural Sciences/ Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/ Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, China
| | - Yang-Rui Li
- Sugarcane Research Institute, Guangxi Academy of Agricultural Sciences/ Sugarcane Research Center, Chinese Academy of Agricultural Sciences/ Key Laboratory of Sugarcane Biotechnology and Genetic Improvement (Guangxi), Ministry of Agriculture and Rural Affairs/ Guangxi Key Laboratory of Sugarcane Genetic Improvement, Nanning, China
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LAJOLO FM, YOKOYAMA SM, CHEAVEGATTI GIANOTTO A. Sugar derived from genetically modified sugarcane. FOOD SCIENCE AND TECHNOLOGY 2021. [DOI: 10.1590/fst.30619] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Calderan-Rodrigues MJ, de Barros Dantas LL, Cheavegatti Gianotto A, Caldana C. Applying Molecular Phenotyping Tools to Explore Sugarcane Carbon Potential. FRONTIERS IN PLANT SCIENCE 2021; 12:637166. [PMID: 33679852 PMCID: PMC7935522 DOI: 10.3389/fpls.2021.637166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/27/2021] [Indexed: 05/21/2023]
Abstract
Sugarcane (Saccharum spp.), a C4 grass, has a peculiar feature: it accumulates, gradient-wise, large amounts of carbon (C) as sucrose in its culms through a complex pathway. Apart from being a sustainable crop concerning C efficiency and bioenergetic yield per hectare, sugarcane is used as feedstock for producing ethanol, sugar, high-value compounds, and products (e.g., polymers and succinate), and bioelectricity, earning the title of the world's leading biomass crop. Commercial cultivars, hybrids bearing high levels of polyploidy, and aneuploidy, are selected from a large number of crosses among suitable parental genotypes followed by the cloning of superior individuals among the progeny. Traditionally, these classical breeding strategies have been favoring the selection of cultivars with high sucrose content and resistance to environmental stresses. A current paradigm change in sugarcane breeding programs aims to alter the balance of C partitioning as a means to provide more plasticity in the sustainable use of this biomass for metabolic engineering and green chemistry. The recently available sugarcane genetic assemblies powered by data science provide exciting perspectives to increase biomass, as the current sugarcane yield is roughly 20% of its predicted potential. Nowadays, several molecular phenotyping tools can be applied to meet the predicted sugarcane C potential, mainly targeting two competing pathways: sucrose production/storage and biomass accumulation. Here we discuss how molecular phenotyping can be a powerful tool to assist breeding programs and which strategies could be adopted depending on the desired final products. We also tackle the advances in genetic markers and mapping as well as how functional genomics and genetic transformation might be able to improve yield and saccharification rates. Finally, we review how "omics" advances are promising to speed up plant breeding and reach the unexplored potential of sugarcane in terms of sucrose and biomass production.
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Affiliation(s)
| | | | | | - Camila Caldana
- Max Planck Institute of Molecular Plant Physiology, Potsdam, Germany
- *Correspondence: Camila Caldana,
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Budeguer F, Enrique R, Perera MF, Racedo J, Castagnaro AP, Noguera AS, Welin B. Genetic Transformation of Sugarcane, Current Status and Future Prospects. FRONTIERS IN PLANT SCIENCE 2021; 12:768609. [PMID: 34858464 PMCID: PMC8632530 DOI: 10.3389/fpls.2021.768609] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/11/2021] [Indexed: 05/13/2023]
Abstract
Sugarcane (Saccharum spp.) is a tropical and sub-tropical, vegetative-propagated crop that contributes to approximately 80% of the sugar and 40% of the world's biofuel production. Modern sugarcane cultivars are highly polyploid and aneuploid hybrids with extremely large genomes (>10 Gigabases), that have originated from artificial crosses between the two species, Saccharum officinarum and S. spontaneum. The genetic complexity and low fertility of sugarcane under natural growing conditions make traditional breeding improvement extremely laborious, costly and time-consuming. This, together with its vegetative propagation, which allows for stable transfer and multiplication of transgenes, make sugarcane a good candidate for crop improvement through genetic engineering. Genetic transformation has the potential to improve economically important properties in sugarcane as well as diversify sugarcane beyond traditional applications, such as sucrose production. Traits such as herbicide, disease and insect resistance, improved tolerance to cold, salt and drought and accumulation of sugar and biomass have been some of the areas of interest as far as the application of transgenic sugarcane is concerned. Although there have been much interest in developing transgenic sugarcane there are only three officially approved varieties for commercialization, all of them expressing insect-resistance and recently released in Brazil. Since the early 1990's, different genetic transformation systems have been successfully developed in sugarcane, including electroporation, Agrobacterium tumefaciens and biobalistics. However, genetic transformation of sugarcane is a very laborious process, which relies heavily on intensive and sophisticated tissue culture and plant generation procedures that must be optimized for each new genotype to be transformed. Therefore, it remains a great technical challenge to develop an efficient transformation protocol for any sugarcane variety that has not been previously transformed. Additionally, once a transgenic event is obtained, molecular studies required for a commercial release by regulatory authorities, which include transgene insertion site, number of transgenes and gene expression levels, are all hindered by the genomic complexity and the lack of a complete sequenced reference genome for this crop. The objective of this review is to summarize current techniques and state of the art in sugarcane transformation and provide information on existing and future sugarcane improvement by genetic engineering.
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Affiliation(s)
- Florencia Budeguer
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Ramón Enrique
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - María Francisca Perera
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Josefina Racedo
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Atilio Pedro Castagnaro
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
- Centro Cientifico Tecnológico (CCT) CONICET NOA Sur, San Miguel de Tucumán, Argentina
| | - Aldo Sergio Noguera
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
| | - Bjorn Welin
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Estación Experimental Agroindustrial Obispo Colombres (EEAOC) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Las Talitas, Argentina
- *Correspondence: Bjorn Welin,
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Sereno ML, Infante S, Cheavegatti-Gianotto A, Hjelle K, Lirette R, Cutri L, Sarto Rocha M, Hjelle J, Cullis C. Evaluation of the effects of sugarcane processing on the presence of GM DNA and protein in sugar. GM CROPS & FOOD 2020; 11:171-183. [PMID: 32522061 PMCID: PMC7518765 DOI: 10.1080/21645698.2020.1771134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 06/11/2023]
Abstract
The Brazilian Sucro-energy Sector produces both energy, in the form of ethanol fuel, industrial steam and electricity, and sugar. Centro de Tecnologia Canavieira (CTC), the leading Brazilian sugarcane breeding company, has developed a pipeline of insect-protected sugarcane varieties to control sugarcane borer damage. The goal of this manuscript is to present the results of studies with three genetically modified (GM) sugarcane varieties and to evaluate the published literature regarding the possible presence of GM sugarcane DNA or protein in raw or refined sugar. Specifically, two varieties of approved GM sugarcane, CTC91087-6 and CTC175-A, and an experimental CTC variety, were grown in four individual plots to produce four batches each of processed raw sugar using standard smaller-scale laboratory processing methods resulting in a total of 12 independent batches of raw sugar. Herein, we report the development of event-specific probes and DNA detection methods, designed to detect the junction of sugarcane genomic DNA and the inserted DNA of the two approved GM varieties. An identical approach was used for the testing of sugar made from the experimental CTC variety. The methodology used TaqMan® real-time PCR and ELISA assays validated for the four GM proteins expressed by these three events (Cry1Ab, Cry1Ac, NPTII, and PAT (bar)). The developed assays had very low limits of detection (LODs) for the various event-specific DNA probes (7.2-25 ng/g sugar) and insecticidal and selectable marker proteins (2.9-10.9 ng/g sugar). No event-specific DNA and no GM proteins were detectable in the 12 independent batches of raw sugar produced from these three GM sugarcane events. The results of this study, using very sensitive methods and testing several sugar batches, extend the conclusions of previous studies, reviewed herein, that showed the extensive degradation and removal of DNA and protein during sugarcane processing. Overall, these results indicate that there are no distinguishable differences between the highly purified, chemically defined sugar produced from conventional or GM varieties.
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Affiliation(s)
- Maria Lorena Sereno
- Regulatory Department, Centro Tecnologia Canavieira (CTC), Piracicaba, brazil
| | | | | | | | | | - Lucas Cutri
- Regulatory Department, Centro Tecnologia Canavieira (CTC), Piracicaba, brazil
| | - Moisés Sarto Rocha
- Regulatory Department, Centro Tecnologia Canavieira (CTC), Piracicaba, brazil
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Bressan EA, de Carvalho IAS, Borges MTMR, Carneiro MS, da Silva EF, Gazaffi R, Shirasuna RT, Abreu V, Popin RV, Figueira A, Oliveira GCX. Assessment of Gene Flow to Wild Relatives and Nutritional Composition of Sugarcane in Brazil. Front Bioeng Biotechnol 2020; 8:598. [PMID: 32637401 PMCID: PMC7317034 DOI: 10.3389/fbioe.2020.00598] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 05/15/2020] [Indexed: 11/13/2022] Open
Abstract
The commercial release of genetically modified organisms (GMO) requires a prior environmental and human/animal health risk assessment. In Brazil, the National Biotechnology Technical Commission (CTNBio) requires a survey of the area of natural occurrence of wild relatives of the GMO in the Brazilian ecosystems to evaluate the possibility of introgressive hybridization between sexually compatible species. Modern sugarcane cultivars, the focus of this study, derive from a series of hybridization and backcrossing events among Saccharum species. The so-called "Saccharum broad sense" group includes around 40 species from a few genera, including Erianthus, found in various tropical regions, particularly South-Eastern Asia. In Brazil, three native species, originally considered to belong to Erianthus, were reclassified as S. angustifolium (Nees) Trin., S. asperum (Nees) Steud., and S. villosum Steud., based on inflorescence morphology. Thus, we have investigated the potential occurrence of gene flow among the Brazilian Saccharum native species and commercial hybrids as a requisite for GMO commercial release. A comprehensive survey was carried out to map the occurrence of the three native Saccharum species in Brazil, concluding that they are sympatric with sugarcane cultivation only from around 14°S southwards, which precludes most Northeastern sugarcane-producing states from undergoing introgression. Based on phenology, we concluded that the Brazilian Saccharum species are unable to outcross naturally with commercial sugarcane since the overlap between the flowering periods of sugarcane and the native species is limited. A phylogenomic reconstruction based on the full plastid genome sequence showed that the three native Saccharum species are the taxa closest to sugarcane in Brazil, being closer than introduced Erianthus or Miscanthus. A 2-year study on eight nutritional composition traits of the 20 main sugarcane cultivars cultivated in Brazil was carried out in six environments. The minimum and maximum values obtained were, in percent: moisture (62.6-82.5); sucrose (9.65-21.76); crude fiber (8.06-21.03); FDN (7.20-20.68); FDA (4.55-16.90); lipids (0.06-1.59); ash (0.08-2.67); and crude protein (0.18-1.18). Besides a considerable amount of genetic variation and plastic responses, many instances of genotype-by-environment interaction were detected.
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Affiliation(s)
- Eduardo Andrade Bressan
- Evolution Laboratory, Department of Genetics, “Luiz de Queiroz” Agricultural College, University of São Paulo, Piracicaba, Brazil
| | - Igor Araújo Santos de Carvalho
- Evolution Laboratory, Department of Genetics, “Luiz de Queiroz” Agricultural College, University of São Paulo, Piracicaba, Brazil
| | - Maria Teresa Mendes Ribeiro Borges
- Technological Analysis and Simulation Laboratory, Department of Agroindustrial Technology and Rural Socioeconomics, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
| | - Monalisa Sampaio Carneiro
- Plant Biotechnology Laboratory, Department of Biotechnology, Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
| | - Edson Ferreira da Silva
- Plant Breeding Laboratory, Biology Department, Federal Rural University of Pernambuco, Recife, Brazil
| | - Rodrigo Gazaffi
- Department of Biotechnology, Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
| | - Regina Tomoko Shirasuna
- Herbarium Curatorship Research Nucleus, Vascular Plants Research Center, Institute of Botany, São Paulo, Brazil
| | - Vinícius Abreu
- Laboratory of Cell and Molecular Biology, Center of Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Rafael V. Popin
- Laboratory of Cell and Molecular Biology, Center of Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Antonio Figueira
- Plant Breeding Laboratory, Center of Nuclear Energy in Agriculture, University of São Paulo, Piracicaba, Brazil
| | - Giancarlo Conde Xavier Oliveira
- Evolution Laboratory, Department of Genetics, “Luiz de Queiroz” Agricultural College, University of São Paulo, Piracicaba, Brazil
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Resistance to Chilo infuscatellus (Lepidoptera: Pyraloidea) in transgenic lines of sugarcane expressing Bacillus thuringiensis derived Vip3A protein. Mol Biol Rep 2020; 47:2649-2658. [PMID: 32128710 DOI: 10.1007/s11033-020-05355-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 02/26/2020] [Indexed: 10/24/2022]
Abstract
Sustainable agriculture requires management of insect pests through resistance development. The biological potential of Cry toxins and Vip protein, derived from Bacillus species, is widely recognized in this context. The identification, evaluation of new insecticidal protein genes with different mode of action and entomotoxicity against sugarcane stem borer (Chilo infuscatellus) is important to overcome evolved insect resistance. In this study, we reported the generation of transgenic sugarcane lines expressing Vip3A toxin driven by polyubiquitin promoter for resistance against sugarcane stem borer. The V0 transgenic sugarcane plants were initially characterized by GUS histochemical staining, PCR and Southern blot assays that confirmed genetic transformation of twelve independent sugarcane lines. Variable transgene expression was found among transgenic sugarcane lines when revealed through Realtime quantitative PCR (RT-qPCR) with highest in S10 line while minimum was observed in V5 line. A similar expression pattern was observed in transgenic sugarcane lines for Vip3A protein concentration which ranged from 5.35 to 8.89 µg/mL. A direct correlation was observed between the Vip3A protein and Vip3A transgene expression in the transgenic sugarcane lines. In in-vitro insect bioassay on V1, Vip3A transgenic sugarcane lines exhibited high resistance to C. infuscatellus with upto 100% mortality compared to the control sugarcane line. Our findings suggest that a single copy insertion of Vip3A gene in transgenic sugarcane lines render them resistant to borer and these lines can be potentially used for generation of insect resistant transgenic sugarcane and could also be employed in gene pyramiding with Bt toxin to prolong resistance.
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Gianotto AC, Rocha MS, Cutri L, Lopes FC, Dal'Acqua W, Hjelle JJ, Lirette RP, Oliveira WS, Sereno ML. The insect-protected CTC91087-6 sugarcane event expresses Cry1Ac protein preferentially in leaves and presents compositional equivalence to conventional sugarcane. GM CROPS & FOOD 2019; 10:208-219. [PMID: 31431143 PMCID: PMC6927693 DOI: 10.1080/21645698.2019.1651191] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A Cry1Ac-expressing sugarcane cultivar, CTC91087-6, has been developed by Centro de Tecnologia Canavieira (CTC) to be resistant to the sugarcane borer (Diatraea saccharalis). This genetically modified event was developed using Agrobacterium-mediated transformation and the help of the selectable marker phosphinothricin N-acetyltransferase (PAT) expressed from bar gene. We describe here a detailed characterization of CTC91087-6 event with respect to protein expression, nutritional composition, and assessment of its derived DNA and proteins in raw sugar. Expression of the Cry1Ac and PAT (bar) proteins produced by CTC91087-6 was evaluated in different tissues and at different times during the growing season. The new proteins are preferentially expressed in leaves, are produced at low levels in stalks, and are near the limits of detection in root tissues. The levels of Cry1Ac were much higher than PAT in all evaluated tissues. Furthermore, Cry1Ac levels in CTC91087-6 leaves are stable at various times during sugarcane cultivation cycle, assuring borer control throughout the complete crop cycle. Assessment of CTC91087-6 tissues for key food and feed nutrients as recommended by OECD to assess the safety of new varieties of sugarcane showed compositional equivalence to the conventional counterpart CTC9001 and to other commercial sugarcane varieties used as references. Raw sugar samples produced from CTC91087-6 did not contain DNA corresponding to cry1Ac and bar genes nor DNA specifically derived from CTC91087-6. In a similar way, there is no detection of Cry1Ac and PAT proteins in raw sugar produced from CTC91087-6. Taken together these results show that CTC91087-6 stably expresses Cry1Ac and PAT proteins and is substantially equivalent to the conventional counterpart CTC9001.
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Affiliation(s)
- Adriana C Gianotto
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | - Moisés S Rocha
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | - Lucas Cutri
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | - Francisco C Lopes
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | - William Dal'Acqua
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | | | | | - Wladecir S Oliveira
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
| | - Maria L Sereno
- Regulatory Department, Centro de Tecnologia Canavieira (CTC), Piracicaba, Brazil
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