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Kakar KU, Nawaz Z, Cui Z, Ahemd N, Ren X. Molecular breeding approaches for production of disease-resilient commercially important tobacco. Brief Funct Genomics 2020; 19:10-25. [PMID: 31942928 DOI: 10.1093/bfgp/elz038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/15/2019] [Accepted: 11/21/2019] [Indexed: 12/26/2022] Open
Abstract
Tobacco is one of the most widely cultivated nonfood cash crops, a source of income, model organism for plant molecular research, a natural pesticide and of pharmaceutical importance. First domesticated in South Americas, the modern-day tobacco (Nicotiana tabacum) is now cultivated in more than 125 countries to generate revenues worth billions of dollars each year. However, the production of this crop is highly threatened by the global presence of devastating infectious agents, which cause huge fiscal loss. These threats have been battled through breeding for acquiring disease resilience in tobacco plants, first, via conventional and now with the use of modern molecular breeding approaches. For efficacy and precision, the characterization of the genetic components underlying disease resistance is the key tool in tobacco for resistance breeding programs. The past few decades have witnessed significant progress in resilience breeding through advanced molecular techniques. The current review discusses history of tobacco breeding since its time of origin till date, highlighting the most widely used techniques and recent advances in molecular research and strategies for resistance breeding. In addition, we narrate the budding possibilities for the future. This review will provide a comprehensive and valuable information for the tobacco growers and researchers to deal with the destructive infectious diseases.
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Liu MM, Zhang XJ, Gao Y, Shen ZC, Lin CY. Molecular characterization and efficacy evaluation of a transgenic corn event for insect resistance and glyphosate tolerance. J Zhejiang Univ Sci B 2018; 19:610-619. [PMID: 30070084 PMCID: PMC6102185 DOI: 10.1631/jzus.b1700345] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 10/02/2017] [Accepted: 10/02/2017] [Indexed: 11/11/2022]
Abstract
A transgenic maize event ZD12-6 expressing a Bacillus thuringiensis (Bt) fusion protein Cry1Ab/Cry2Aj and a modified 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) protein G10 was characterized and evaluated. Southern blot analysis indicated that ZD12-6 is a single copy integration event. The insert site was determined to be at chromosome 1 by border sequence analysis. Expression analyses of Bt fusion protein Cry1Ab/Cry2Aj and the EPSPS protein G10 suggested that they are both expressed stably in different generations. Insect bioassays demonstrated that the transgenic plants are highly resistant to Asian corn borer (Ostrinia furnacalis), cotton boll worm (Helicoverpa armigera), and armyworm (Mythimna separata). This study suggested that ZD12-6 has the potential to be developed into a commercial transgenic line.
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Bakhsh A, Dinç T, Hussain T, Demirel U, Aasim M, Çalişkan ME. Development of transgenic tobacco lines with pyramided insect resistant genes. Turk J Biol 2018; 42:174-186. [PMID: 30814879 DOI: 10.3906/biy-1710-71] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Insect pests are among the major constraints rendering drastic decreases in crop yield. The expression of stacked insecticidal genes in crops can lead to resistance durability and can delay the development of resistance in target insect pests. The present study was designed to introduce an insect resistance trait in locally cultivated Turkish tobacco cultivars (Basma and Nail) with pyramided insecticidal genes. Agrobacterium strain LBA4404 harboring plasmid pKGH4 with cry1Ac and cry2A genes under the control of 35S promoter was used to infect leaf discs of both cultivars; plasmid also contained uidA within the T-DNA region for earlier screening of putative transformants. The overall transformation efficiency was calculated as 30.7% and 18.8% in Basma and Nail, respectively. PCR results confirmed the integration of cry1Ac, cry2A, uidA, and nptII genes in 40 plants of Basma and 16 plants of Nail. ELISA results showed variation in expression of cry1Ac protein among transgenic plants varying from 0.017 to 0.607 µg/g of fresh tissue. Bioassay results with potato tuber moth (Phthorimea operculella Zeller) showed significant mortality of the targeted pest on primary transformants. Furthermore, T1 transgenic progeny exhibited the inheritance of T-DNA in Mendelian as well as non-Mendelian fashion. The results revealed that lines can serve as a source of germplasm in tobacco breeding programs.
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Affiliation(s)
- Allah Bakhsh
- Department of Agricultural Genetic Engineering, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University , Niğde , Turkey
| | - Tolga Dinç
- Department of Agricultural Genetic Engineering, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University , Niğde , Turkey
| | - Tahira Hussain
- Department of Agricultural Genetic Engineering, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University , Niğde , Turkey
| | - Ufuk Demirel
- Department of Agricultural Genetic Engineering, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University , Niğde , Turkey
| | - Muhammad Aasim
- Department of Biotechnology, Faculty of Science, Necmettin Erbakan University , Konya , Turkey
| | - Mehmet Emin Çalişkan
- Department of Agricultural Genetic Engineering, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University , Niğde , Turkey
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Naqvi RZ, Asif M, Saeed M, Asad S, Khatoon A, Amin I, Mukhtar Z, Bashir A, Mansoor S. Development of a Triple Gene Cry1Ac- Cry2Ab- EPSPS Construct and Its Expression in Nicotiana benthamiana for Insect Resistance and Herbicide Tolerance in Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:55. [PMID: 28174591 PMCID: PMC5259679 DOI: 10.3389/fpls.2017.00055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 01/10/2017] [Indexed: 06/06/2023]
Abstract
Insect pest complex, cotton leaf curl disease and weeds pose major threat to crop production worldwide, including Pakistan. To address these problems, in the present study a triple gene construct harboring Cry1Ac, Cry2Ab, and EPSPS cassettes has been developed for plant specifically in cotton transformation against lepidopteron insect-pests and weeds. Nicotiana benthamiana (tobacco) was used as a model system for characterization of this triple gene construct. The construct has been assembled in plant expression vector and transformed in N. benthamiana. In six transgenic tobacco lines the integration of Cry1Ac-Cry2Ab-EPSPS in tobacco genome was checked by PCR, while successful protein expression of all the three genes was confirmed through immunostrip assay. Efficacy of Cry1Ac and Cry2Ab was evaluated through insect bioassay using armyworm (Spodoptera littoralis). These transgenic tobacco plants showed significant insect mortality as compared to control plants during insect bioassay. Three out of six tested transgenic lines L3, L5, and L9 exhibited 100% mortality of armyworm, while three other lines L1, L10, and L7 showed 86, 80, and 40% mortality, respectively. This construct can readily be used with confidence to transform cotton and other crops for the development of insect resistant and herbicide tolerant transgenic plants. The transgenic crop plants developed using this triple gene construct will provide an excellent germplasm resource for the breeders to improve their efficiency in developing stable homozygous lines as all the three genes being in a single T-DNA border will inherit together.
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Affiliation(s)
- Rubab Z. Naqvi
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
- Pakistan Institute of Engineering and Applied SciencesNilore, Pakistan
| | - Muhammad Asif
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Muhammad Saeed
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Shaheen Asad
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Asia Khatoon
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Imran Amin
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Zahid Mukhtar
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
| | - Aftab Bashir
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
- Department of Biological Sciences, Forman Christian CollegeLahore, Pakistan
| | - Shahid Mansoor
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic EngineeringFaisalabad, Pakistan
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Qiu L, Zhang B, Liu L, Ma W, Wang X, Lei C, Chen L. Proteomic analysis of Cry2Aa-binding proteins and their receptor function in Spodoptera exigua. Sci Rep 2017; 7:40222. [PMID: 28067269 PMCID: PMC5220377 DOI: 10.1038/srep40222] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 12/01/2016] [Indexed: 01/09/2023] Open
Abstract
The bacterium Bacillus thuringiensis produces Crystal (Cry) proteins that are toxic to a diverse range of insects. Transgenic crops that produce Bt Cry proteins are grown worldwide because of their improved resistance to insect pests. Although Bt "pyramid" cotton that produces both Cry1A and Cry2A is predicted to be more resistant to several lepidopteran pests, including Spodoptera exigua, than plants that produce Cry1Ac alone, the mechanisms responsible for the toxicity of Cry2Aa in S. exigua are not well understood. We identified several proteins that bind Cry2Aa (polycalin, V-ATPase subunits A and B, actin, 4-hydroxybutyrate CoA-transferase [4-HB-CoAT]), and a receptor for activated protein kinase C (Rack), in S. exigua. Recombinant, expressed versions of these proteins were able to bind the Cry2Aa toxin in vitro assays. RNA interference gene knockdown of the Se-V-ATPase subunit B significantly decreased the susceptibility of S. exigua larvae to Cry2Aa, whereas knockdown of the other putative binding proteins did not. Moreover, an in vitro homologous competition assay demonstrated that the Se-V-ATPase subunit B binds specifically to the Cry2Aa toxin, suggesting that this protein acts as a functional receptor of Cry2Aa in S. exigua. This the first Cry2Aa toxin receptor identified in S. exigua brush-border membrane vesicles.
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Affiliation(s)
- Lin Qiu
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Boyao Zhang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Lang Liu
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Weihua Ma
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Xiaoping Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Chaoliang Lei
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
| | - Lizhen Chen
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
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Improved Insecticidal Toxicity by Fusing Cry1Ac of Bacillus thuringiensis with Av3 of Anemonia viridis. Curr Microbiol 2013; 68:604-9. [DOI: 10.1007/s00284-013-0516-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 11/30/2013] [Indexed: 12/31/2022]
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Hernandez D, Rodriguez- L, Valdes R, Moran I, Tellez P, Riveron A, Ramos Y, Gomez L, Ayra-Pardo C. Bacillus thuringiensis Vip3Aa1 Expression and Purification from E.
coli to be Determined in Seeds and Leaves of Genetically-Modified Corn Plants. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/ja.2013.153.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Karimi SM, Sohail MN, Amin I, Mansoor S, Mukhtar Z. Molecular characterization of a new synthetic cry2ab gene in Nicotiana tabacum. Biotechnol Lett 2013; 35:969-74. [PMID: 23397269 DOI: 10.1007/s10529-013-1153-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 01/23/2013] [Indexed: 11/29/2022]
Abstract
A newly-synthesized cry2Ab gene was characterized in Nicotiana tabacum, before its further transformation in cotton. Synthetic cry2Ab gene was cloned in pGreen0029 and its expression was transiently analyzed at mRNA level through agroinfiltration in tobacco. The mRNA of cry2Ab was detected after 72 h agroinfiltration through PCR using total plant RNA. This construct was then transformed into N. tabacum through Agrobacterium. Insect bioassays were conducted on detached leaves using first instar Spodoptera exigua larvae; after 96 h significant insect mortality was recorded. This newly synthesized gene was effective in controlling S. exigua first instar larvae. It can be used in combinations with other Bt genes like cry1Ac for developing resistance against major insect pests of cotton and further widening the insect control spectrum.
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Affiliation(s)
- Sohail Mehmood Karimi
- National Institute for Biotechnology and Genetic Engineering, P.O. Box 577, Jhang Road, Faisalabad, Pakistan.
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