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Najeebullah S, Umer N, Zahra Naqvi R, Arshad M, Jander G, Asad S, Mukhtar Z, Asif M. Transgenic cotton expressing Allium sativum leaf agglutinin exhibits resistance to whiteflies and aphids without negative effects on ladybugs. Gene 2024; 933:148926. [PMID: 39255858 DOI: 10.1016/j.gene.2024.148926] [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: 04/30/2024] [Revised: 08/26/2024] [Accepted: 09/04/2024] [Indexed: 09/12/2024]
Abstract
Cotton (Gossypium hirsutum L.) is of great economic importance as a cultivated crop in many parts of the world. In addition to being a pillar of the textile industry, cotton and its byproducts are used for livestock feed, seed oil, and other products. Bacillus thuringiensis crystal toxin (Bt) expression in cotton provides effective protection against chewing insects but does not defend plants from piercing/sucking insect pests. With the aim to create transgenic plants with resistance against piercing/sucking pests, we used Agrobacterium-mediated genetic transformation of cotton cultivar Coker 312 to express the Allium sativum leaf agglutinin (ASLA) gene from the phloem-specific rolC promoter. The ASLA transgene was stably inherited and showed Mendelian segregation in the T1 generation. Transgenic lines, expressing the ASLA gene, showed explicit resistance against major sap-sucking pests. Green peach aphid (Myzus persicae Sulzer) choice assays showed that 75% of aphids preferred untransformed cotton plants relative to those expressing the ASLA gene. In detached leaf bioassays, plants expressing ASLA caused 82% aphid mortality and 44-53% reduction in fecundity. Clip cage bioassays with whiteflies (Bemisia tabaci Gennadius) showed 74-82% mortality and 44-60% decrease in fecundity due to ASLA gene expression. In whole plant bioassays, whiteflies showed 77% mortality and a 54% decrease in fecundity on ASLA transgenics. Importantly, we did not observe a negative effect of the ASLA gene on ladybugs (Coccinella septempunctata) that consumed these whiteflies. Together, our findings demonstrate the potential of ASLA-transgenic cotton for providing protection against two devastating insect pests, whiteflies and aphids. The ASLA-transgenic cotton appears promising for direct commercial cultivation besides serving as a potential genetic resource in recombination breeding.
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Affiliation(s)
- Syed Najeebullah
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan; Boyce Thompson Institute, Ithaca, NY 14853, USA
| | - Noroza Umer
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan
| | - Rubab Zahra Naqvi
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan
| | - Muhammad Arshad
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan
| | | | - Shaheen Asad
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan
| | - Zahid Mukhtar
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan
| | - Muhammad Asif
- National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad 38000, Pakistan.
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Wang YR, Yao Y, Chen YH, Huang C, Guo YF, Fang Y, Gao SJ, Hou YM, Wang JD. A ScWIP5 gene confers fall armyworm resistance by reducing digestive enzyme activities in sugarcane. PEST MANAGEMENT SCIENCE 2024; 80:1930-1939. [PMID: 38072905 DOI: 10.1002/ps.7925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/24/2023] [Accepted: 12/11/2023] [Indexed: 01/30/2024]
Abstract
BACKGROUND The fall armyworm, Spodoptera frugiperda, is one of the most dangerous pests to various crops. As the most crucial sugar crop, sugarcane is also constantly threatened by these pests. Plant wound-induced proteinase inhibitors (WIP) are natural defense proteins that play important roles in the defense system against insect attack. Breeding for resistance would be the best way to improve the variety characteristics and productivity of sugarcane. Screening and verification for potential plant endogenous insect-resistant genes would greatly improve the insect-resistant breeding progress of sugarcane. RESULTS A sugarcane WIP5 gene (ScWIP5) was up-regulated 536 times after insect feeding treatment on previous published transcriptome databases. ScWIP5 was then cloned and its potential role in sugarcane resistance to fall armyworm evaluated by construction of transgenic Nicotiana benthamiana. The toxicity of ScWIP5 transgenic N. benthamiana to fall armyworm showed lower weight gain and higher mortality compared to wild-type N. benthamiana feeding group. Furthermore, the concentration of JA and NbAOC, NbAOS, and NbLOX from the Jasmin acid biosynthesis pathway was significantly induced in ScWIP5 transgenic N. benthamiana compared to the control. In addition, digestive enzyme actives from the insect gut were also evaluated, and trypsin and cathepsin were significantly lower in insects fed with ScWIP5 transgenic N. benthamiana. CONCLUSION These results indicate that ScWIP5 might enhance insect resistance by increasing JA signal transduction processes and reducing insect digestive enzyme activities, thus impacting insect growth and development. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Ya-Ru Wang
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
- Xianghu Laboratory, Hangzhou, People's Republic of China
| | - Yang Yao
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - Yao-Hui Chen
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - Cheng Huang
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - Yan-Fang Guo
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - Yong Fang
- Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agriculture science, Changsha, People's Republic of China
| | - San-Ji Gao
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - You-Ming Hou
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
| | - Jin-da Wang
- National Engineering Research Center of Sugarcane, State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agricultural and Forestry University, Fuzhou, People's Republic of China
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Arsov A, Gerginova M, Paunova-Krasteva T, Petrov K, Petrova P. Multiple cry Genes in Bacillus thuringiensis Strain BTG Suggest a Broad-Spectrum Insecticidal Activity. Int J Mol Sci 2023; 24:11137. [PMID: 37446315 DOI: 10.3390/ijms241311137] [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: 06/05/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
The properties of Bacillus thuringiensis strains as a biopesticide with potent action against moths, beetles, and mosquitoes have been known for decades, with individual subspecies showing specific activity against a particular pest. The aim of the present work is to characterize strains that can be used for broad-spectrum pest control in agriculture. Twenty strains of B. thuringiensis were isolated from Bulgarian soil habitats. The strains were screened for genes encoding 12 different crystal (Cry) endotoxins by PCR with specific primer pairs. Seven of the isolates contained cry genes in their genomes. B. thuringiensis strains PL1, PL3, and PL20 contained at least three different cry genes, while B. thuringiensis serovar galleriae BTG contained at least four. Moreover, scanning electron microscopy (SEM) investigation revealed the production of bipyramidal (PL1, PL3, PL20), polygonal (PL1), cubic (BTG), and spherical crystals (BTG and PL20). Potentially containing the most cry genes, the BTG genome was sequenced and annotated. It comprises 6,275,416 base pairs, does not contain plasmids, has a GC content of 35.05%, and contained 7 genes encoding crystal toxins: cry1Ab35, cry1Db, cry1Fb, cry1Ib, cry2Ab, cry8Ea1, and cry9Ba. This unique combination would possibly enable the simultaneous pesticidal action against pest species from orders Lepidoptera, Coleoptera, Diptera, and Hemiptera, as well as class Gastropoda. Whole-genome sequencing provided accurate information about the presence, localization, and classification of Cry toxins in B. thuringiensis BTG, revealing the great potential of the strain for the development of new broad-spectrum bio-insecticides.
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Affiliation(s)
- Alexander Arsov
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Maria Gerginova
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | | | - Kaloyan Petrov
- Institute of Chemical Engineering, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Penka Petrova
- Institute of Microbiology, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Liu F, Liu Y, Zou J, Zhang L, Zheng H, Luo Y, Wang X, Wang L. Molecular Characterization and Efficacy Evaluation of Transgenic Maize Harboring cry2Ab- vip3A- cp4epsps for Insect Resistance and Herbicide Tolerance. PLANTS (BASEL, SWITZERLAND) 2023; 12:612. [PMID: 36771697 PMCID: PMC9919038 DOI: 10.3390/plants12030612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/18/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Insect infestation and weed interference have a seriously negative impact on the growth, yield, and grain quality of maize. In this study, transgenic maize plants harboring three exogenous genes, cry2Ab, vip3A, and cp4epsps, that were constructed into a single T-DNA were developed for protection against insects and weeds. The transgene integration sites on the chromosomes in two transgenic maize events, CVC-1 and CVC-2, were determined using whole genome sequencing and specific PCR detection. As revealed by laboratory insect bioassays, these two transgenic events exhibited strong insecticidal toxicity against three major species of Lepidoptera insects, including Mythimna separata, Helicoverpa armigera, and Spodoptera frugiperda, with mortality rates exceeding 96%, 100%, and 100%, respectively, after six days of infestation. In addition, CVC-1 exhibited a high tolerance to glyphosate under field conditions. The successful expressions of cry2Ab, vip3A, and cp4epsps in various tissues at different developmental stages of CVC-1 were validated at the transcriptional and translational levels using quantitative real-time reverse transcription PCR (qRT-PCR) and enzyme-linked immunosorbent assay (ELISA), respectively. These findings demonstrated that the transgenic maize CVC-1 developed using this triple gene construct has excellent insect resistance and herbicide tolerance, which may provide a valuable germplasm resource and data support for future maize breeding of insect and weed control.
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Affiliation(s)
- Fantao Liu
- Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province, Harbin Normal University, Harbin 150025, China
| | - Yuan Liu
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
| | - Junjie Zou
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
| | - Lan Zhang
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
| | - Hongyan Zheng
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
| | - Yanzhong Luo
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
| | - Xiaoping Wang
- Key Laboratory of Molecular Cytogenetics and Genetic Breeding of Heilongjiang Province, Harbin Normal University, Harbin 150025, China
| | - Lei Wang
- CAAS/Key Laboratory of Agricultural Genomics (Beijing), Biotechnology Research Institute, Ministry of Agriculture, Beijing 100081, China
- National Nanfan Research Institute (Sanya), Sanya 572022, China
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Siddiqui HA, Asad S, Naqvi RZ, Asif M, Liu C, Liu X, Farooq M, Abro S, Rizwan M, Arshad M, Sarwar M, Amin I, Mukhtar Z, Mansoor S. Development and evaluation of triple gene transgenic cotton lines expressing three genes (Cry1Ac-Cry2Ab-EPSPS) for lepidopteran insect pests and herbicide tolerance. Sci Rep 2022; 12:18422. [PMID: 36319662 PMCID: PMC9626562 DOI: 10.1038/s41598-022-22209-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 10/11/2022] [Indexed: 12/02/2022] Open
Abstract
Cotton is an international agricultural commodity and the main cash crop of Pakistan of which quality and quantity are subject to various whims of nature. Climate change, insect pest complex, and weeds are reducing its productivity. Here, we have developed triple gene cotton containing EPSPS gene along with two Bt toxin genes Cry1Ac and Cry2Ab using a strategy where all three genes are cloned in the same T-DNA, followed by successful cotton transformation via Agrobacterium-mediated transformation. This strategy has been developed to help cotton breeders in developing new cultivars by incorporating these genes into the non-transgenic or single Bt (Cry1Ac) gene cotton background where all three genes will inherit together. The expression of all three proteins was confirmed through immunostrips and was quantified through enzyme-linked immunosorbent assay (ELISA). The spatio-temporal expression of Bt protein in different parts of triple gene NIBGE cotton plants was determined. Maximum expression was found in leaves followed by seeds and boll rinds. Insect bioassays with cotton bollworms (Helicoverpa armigera), armyworms (Spodoptera litura), and pink bollworms (Pectinophora gossypiella) showed more than 90% mortality. The best performing line (NIBGE-E2) on the basis of spatiotemporal expression, glyphosate assays, and insect mortality data, was used for event characterization by using the genome sequencing approach. The event was successfully characterized and named NIBGE 20-01. A diagnostics test based on event-specific PCR was developed and its ability to distinguish NIBGE 20-01 event from other commercial transgenic cotton events was confirmed. To confirm stable expression of all three proteins in the field conditions, homozygous transgenic lines were grown in the field and the expression was confirmed through immunostrip assays. It was found that all three genes are expressed under field conditions. To show that all three genes are inherited together upon crossing with local elite cotton lines, the F1 generation was grown under glasshouse and field conditions. The expression of all three genes was confirmed under field conditions. Our results showed that transgenic cotton with three genes cloned in the same T-DNA can express all genes and can be conveniently transferred into elite cotton lines through a single cross.
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Affiliation(s)
- Hamid Anees Siddiqui
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
- Department of Biotechnology, University of Sialkot, Sialkot, Pakistan
| | - Shaheen Asad
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Rubab Zahra Naqvi
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Muhammad Asif
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | | | - Xin Liu
- Beijing Genomics Institute Shenzhen, Shenzhen, China
| | - Muhammad Farooq
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Saifullah Abro
- Plant Breeding and Genetics Division, Nuclear Institute of Agriculture (NIA), Tando Jam, Pakistan
| | - Muhammad Rizwan
- Plant Breeding and Genetics Division, Nuclear Institute of Agriculture (NIA), Tando Jam, Pakistan
| | - Muhammad Arshad
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Muhammad Sarwar
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Imran Amin
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan
| | - Zahid Mukhtar
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan.
| | - Shahid Mansoor
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, College Pakistan Institute of Engineering and Applied Sciences (NIBGE-C, PIEAS), Faisalabad, Punjab, Pakistan.
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P07-45 Toxicity assessment of transgenic cotton containing double gene (Cry1Ac and Cry2Ab) and triple gene (Cry1Ac, Cry2Ab, and EPSPS) as plant incorporated protectants against insects and weed. Toxicol Lett 2022. [DOI: 10.1016/j.toxlet.2022.07.388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jiang L, Chen J, Yang YZ, Li R, Li S, Wang ZQ, Jiang T. Functional analysis of a viral promoter from a strawberry vein banding virus isolate from China. Virol J 2022; 19:60. [PMID: 35361243 PMCID: PMC8974135 DOI: 10.1186/s12985-022-01778-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 03/08/2022] [Indexed: 11/10/2022] Open
Abstract
Background Promoters are important factors affecting gene expression in cells. The driven activities of viral promoters were generally assessed to screen available promoters for transgenic and research and biotech industries. In this study, we cloned a full-length promoter from a Chinese isolate of strawberry vein banding virus (SVBV) and produced several deletion mutants for evaluation of applications in production of reporter proteins in stable transgenic plants. Methods The full-length promoter of SVBV (SP1) and its three deletion mutants (SP2, SP3, and SP4) were amplified using polymerase chain reaction. The effects of SVBV SP1, SP2, SP3, and SP4 on gene expression were evaluated using β-glucuronidase (GUS) and green fluorescent protein (GFP) reporter genes. Results Transient expression assays showed that the SVBV SP1 promoter and its three deletion mutants all expressed the reporter genes, albeit at very different levels. Interestingly, transcriptional activity driven by the SP1 promoter was much higher than that of the cauliflower mosaic virus (CaMV) 35S promoter. After stable transformation of the GUS gene into Nicotiana tabacum plants, SVBV SP1-driven transgene expression was approximately 2.6-fold higher than CaMV 35S promoter-driven transgene expression. In addition, GUS gene expression levels were enhanced by co-inoculation of the plants with the SP1 promoter-driven vector carrying the GUS gene and the vector expressing SVBV open reading frame (ORF) V or ORF VI. Conclusions The SVBV SP1 promoter from the Chinese isolate evaluated in this study could successfully drive transient and stable expression in plants, it was a stronger promoter than the CaMV 35S and FLt-US promoters and may be more useful for the production of stable transgenic plants. Supplementary Information The online version contains supplementary material available at 10.1186/s12985-022-01778-2.
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Affiliation(s)
- Lei Jiang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China.,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China.,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Jing Chen
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China.,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China.,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - You-Zhi Yang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China.,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China.,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Rui Li
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China.,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China.,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Shuang Li
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China.,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China.,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China
| | - Zhan-Qi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000, People's Republic of China.
| | - Tong Jiang
- School of Plant Protection, Anhui Agricultural University, Hefei, 230036, People's Republic of China. .,Anhui Province Key Laboratory of Integrated Pest Management on Crops, Hefei, 230036, People's Republic of China. .,Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei, 230036, People's Republic of China.
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Asif M, Siddiqui HA, Naqvi RZ, Amin I, Asad S, Mukhtar Z, Bashir A, Mansoor S. Development of event-specific detection method for identification of insect resistant NIBGE-1601 cotton harboring double gene Cry1Ac-Cry2Ab construct. Sci Rep 2021; 11:3479. [PMID: 33568702 PMCID: PMC7876094 DOI: 10.1038/s41598-021-82798-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 01/07/2021] [Indexed: 11/09/2022] Open
Abstract
Bt cotton expressing Cry1Ac is being cultivated in Pakistan. It has been observed that pink bollworm may have developed resistance against single Bt gene (Cry1Ac). For durable resistance, insect resistant NIBGE-1601 cotton harboring double gene Cry1Ac-Cry2Ab construct was developed. There was a need to characterize NIBGE-1601 event for intellectual property rights protection. The Presence of NIBGE Cry1Ac and NIBGE Cry2Ab genes was checked in NIBGE-1601 cotton plants through PCR, while there was no amplification using primers specific for Monsanto events (MON531, MON15985, MON1445). Using genome walking technology, NIBGE-601 event has been characterized. Event-specific primers of NIBGE-1601 were designed and evaluated to differentiate it from other cotton events mentioned above. NIBGE-1601 event detection primers are highly specific, therefore, can detect NIBGE 1601 event at different conditions using single or multiplex PCR. In the qualitative PCR, using NIBGE-1601 event specific primers, 0.05 ng was the limit of detection for NIBGE-1601double gene cotton genomic DNA. Thus event characterization and development of event-specific diagnostics will help in breeding new cotton varieties resistant to cotton bollworms.
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Affiliation(s)
- Muhammad Asif
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan
| | - Hamid Anees Siddiqui
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan.,Pakistan Institute of Engineering and Applied Sciences, Nilore, Pakistan
| | - Rubab Zahra Naqvi
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan
| | - Imran Amin
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan
| | - Shaheen Asad
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan
| | - Zahid Mukhtar
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan
| | - Aftab Bashir
- Department of Biological Sciences, Forman Christian College, Lahore, Pakistan
| | - Shahid Mansoor
- Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic, Engineering, Faisalabad, Pakistan.
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Khan MH, Jander G, Mukhtar Z, Arshad M, Sarwar M, Asad S. Comparison of in Vitro and in Planta Toxicity of Vip3A for Lepidopteran Herbivores. JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:2959-2971. [PMID: 33080004 DOI: 10.1093/jee/toaa211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Indexed: 06/11/2023]
Abstract
Agricultural pest infestation is as old as domestication of food crops and contributes a major share to the cost of crop production. In a transgenic pest control approach, plant production of Vip3A, an insecticidal protein from Bacillus thuringiensis, is effective against lepidopteran pests. A synthetic Vip3A gene was evaluated for efficacy against Spodoptera litura Fabricius (Lepidoptera: Noctuidae; cotton leafworm), Spodoptera exigua Hübner (Lepidoptera: Noctuidae; beet armyworm), Spodoptera frugiperda Smith (Lepidoptera: Noctuidae; fall armyworm), Helicoverpa armigera Hübner (Lepidoptera: Noctuidae; cotton bollworm), Helicoverpa zea Boddie (Lepidoptera: Noctuidae; corn earworm), Heliothis virescens Fabricius (Lepidoptera: Noctuidae; tobacco budworm), and Manduca sexta L. (Lepidoptera: Sphingidae; tobacco hornworm) in tobacco. In artificial diet assays, the concentration required to achieve 50% mortality was highest for H. zea followed by H. virescens > S. exigua > H. armigera > M. sexta > S. frugiperda > S. litura. By contrast, in bioassays with detached leaves from Vip3A transgenic tobacco, the time until 50% lethality was M. sexta > H. virescens > S. litura > H. zea > H. armigera > S. exigua. There was no significant correlation between the artificial diet and transgenic plant bioassay results. Notably, the two insect species that are best-adapted for growth on tobacco, M. sexta and H. virescens, showed the greatest time to 50% mortality on Vip3A-transgenic tobacco. Together, our results suggest that artificial diet assays may be a poor predictor of Vip3A efficacy in transgenic plants, lepidopteran species vary in their sensitivity to Vip3A in diet-dependent manner, and host plant adaptation of the targeted herbivores should be considered when designing transgenic plants for pest control.
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Affiliation(s)
- Muhammad Hassaan Khan
- Agricultural Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Pakistan Institute for Engineering and Applied Sciences (PIEAS), Nilore Islamabad, Pakistan
| | | | - Zahid Mukhtar
- Agricultural Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Pakistan Institute for Engineering and Applied Sciences (PIEAS), Nilore Islamabad, Pakistan
| | - Muhammad Arshad
- Agricultural Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Pakistan Institute for Engineering and Applied Sciences (PIEAS), Nilore Islamabad, Pakistan
| | - Muhammad Sarwar
- Agricultural Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Pakistan Institute for Engineering and Applied Sciences (PIEAS), Nilore Islamabad, Pakistan
| | - Shaheen Asad
- Agricultural Biotechnology Division, National Institute for Biotechnology & Genetic Engineering (NIBGE), Faisalabad, Pakistan
- Pakistan Institute for Engineering and Applied Sciences (PIEAS), Nilore Islamabad, Pakistan
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10
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Shehryar K, Khan RS, Iqbal A, Hussain SA, Imdad S, Bibi A, Hamayun L, Nakamura I. Transgene Stacking as Effective Tool for Enhanced Disease Resistance in Plants. Mol Biotechnol 2020; 62:1-7. [PMID: 31538309 DOI: 10.1007/s12033-019-00213-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Introduction of more than one gene into crop plants simultaneously or sequentially, called transgene stacking, has been a more effective strategy for conferring higher and durable insect and disease resistance in transgenic plants than single-gene technology. Transgenes can be stacked against one or more pathogens or for traits such as herbicide tolerance or anthocyanin pigmentation. Polygenic agronomic traits can be improved by multiple gene transformation. The most widely engineered stacked traits are insect resistance and herbicide tolerance as these traits may lead to lesser use of pesticides, higher yield, and efficient control of weeds. In this review, we summarize transgene stacking of two or more transgenes into crops for different agronomic traits, potential applications of gene stacking, its limitations and future prospects.
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Affiliation(s)
- Kashmala Shehryar
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Raham Sher Khan
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan.
| | - Aneela Iqbal
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | | | - Sawera Imdad
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Anam Bibi
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Laila Hamayun
- Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Ikuo Nakamura
- Graduate School of Horticulture, Chiba University Japan, Matsudo, Chiba, Japan
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Katta S, Talakayala A, Reddy MK, Addepally U, Garladinne M. Development of transgenic cotton (Narasimha) using triple gene Cry2Ab-Cry1F-Cry1Ac construct conferring resistance to lepidopteran pest. J Biosci 2020. [DOI: 10.1007/s12038-020-0006-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Katta S, Talakayala A, Reddy MK, Addepally U, Garladinne M. Development of transgenic cotton (Narasimha) using triple gene Cry2Ab-Cry1F-Cry1Ac construct conferring resistance to lepidopteran pest. J Biosci 2020; 45:31. [PMID: 32020913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-yielding Indian cotton varieties are not amenable for regeneration and transformation because they are recalcitrant in nature. In this work, we have developed Narasimha (NA1325) cotton variety by introducing three Cry genes driven by three different promoters conferring insect resistance. The meristematic region of embryo axis explants were infected and co-cultivated with Agrobacterium tumefacience (LBA4404) harbouring pMDC100 vector with three Cry gene cassettes (alpha-globulin : Cry2Ab, DECaMV35s : Cry1F and nodulin : Cry1Ac) with Npt II as a selectable marker gene. Out of 1010 embryo axes explants infected, 121 (T0) regenerated under two rounds of kanamycin selectionmedium.About 2551T1 seedswere collected from111T0 plants and these seeds screened again with kanamycin at seedling stage. The transgenic plants were characterized by PCR, real time quantitative PCR, lateral flow strip protein assay and insect bioassay. Out of 145 kanamycin resistant plants (T1), twelve showed amplification of all four transgenes: Npt II, Cry2Ab, Cry1F and Cry1Ac through PCR with expected amplicons as 395, 870, 840 and 618 bp, respectively. Further, lateral flow strip test revealed Cry1F and Cry1Ac proteins accumulated in 12 plants, whereas Cry2Ab protein was detected in eight only. The transcripts of all three Cry genes were accumulated significantly higher in transgenic plants at T2 generation. The transgenic lines showed effective resistance againstHelicoverpa armigera and Spodoptera litura larvae. The T2 line L-3 exhibited highest percentage of insect mortality, in which transcripts of all cry genes were accumulated higher than other plants. The transgenic cotton plants carrying triple Cry genes could be an excellent germplasmresource for the breeders for introgressions.
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Affiliation(s)
- Sumalatha Katta
- Plant Molecular Biology Laboratory, Agri Biotech Foundation, Rajendranagar, Hyderabad 500 030, India
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13
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Development and evaluation of double gene transgenic cotton lines expressing Cry toxins for protection against chewing insect pests. Sci Rep 2019; 9:11774. [PMID: 31409859 PMCID: PMC6692333 DOI: 10.1038/s41598-019-48188-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 07/09/2019] [Indexed: 11/18/2022] Open
Abstract
Cotton is the main fiber producing crop globally, with a significant impact on the economy of Pakistan. Bt cotton expressing a Cry1Ac gene is grown over a large area in Pakistan, however, there is a major concern that bollworms may develop resistance. Here we have used a durable resistance strategy against bollworms by developing a double gene construct containing Cry1Ac and Cry2Ab (pGA482-12R) for cotton transformation. Both Cry toxin genes have been cloned in the same T-DNA borders and transferred successfully into cotton via Agrobacterium-mediated transformation. Both genes are expressed in transgenic cotton plants and is likely to help breeders in developing new cotton cultivars by incorporating these genes in cotton lines having no Bt genes or expressing Cry1Ac gene (Mon 531). Positive transgenic cotton was identified by PCR using specific primers for the amplification of both Cry1Ac and Cry2Ab genes. Cry1Ac and Cry2Ab expression was confirmed with an immunostrip test and quantified using ELISA that showed significant spatio-temporal expression of Cry2Ab ranging from 3.28 to 7.72 µg/g of the tissue leaf. Insect bioassay with army worm (Spodoptera litura) was performed to check the efficacy of NIBGE (National Institute for Biotechnology and Genetic Engineering) double gene transgenic cotton plants and up to 93% insect mortality was observed.
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Boonmee K, Thammasittirong SNR, Thammasittirong A. Molecular characterization of lepidopteran-specific toxin genes in Bacillus thuringiensis strains from Thailand. 3 Biotech 2019; 9:117. [PMID: 30854277 DOI: 10.1007/s13205-019-1646-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 02/21/2019] [Indexed: 01/14/2023] Open
Abstract
A total of 511 local isolates of Bacillus thuringiensis from different geographical regions of Thailand were analyzed for the presence of the cry1A, cry1B, cry2A, cry9, and vip3A genes encoding for lepidopteran-specific toxins. PCR results revealed that 94.32% (482/511) of B. thuringiensis isolates harbored at least one of the detected genes, of which the cry1A, cry1B, cry2A, cry9, and vip3A genes were detected at frequencies of 90.61%, 89.63%, 76.32%, 40.70%, and 48.18%, respectively. Nineteen gene-combination profiles were discovered among 482 B. thuringiensis isolates, of which the most frequently detected profile contained the cry1A, cry1B, cry2A, and vip3A genes. Sixty-one isolates (12.66%), which harbored all of the detected insecticidal toxin genes, were further detected for the exochitinase (chi36) gene and chitinase activity. The results revealed that all 61 isolates contained the chi36 gene and exhibited chitinase activity. Insect bioassays showed that five isolates were highly toxic (more than 80% mortality) against second instar larvae of Spodoptera litura, of which the highest insect mortality (93%) was obtained from the B. thuringiensis isolates 225-15 and 417-1. Scanning electron microscopy revealed that the crystal morphologies of the five effective isolates were bipyramidal and cuboidal shapes. SDS-PAGE analysis of the spore-crystal mixture showed major bands of approximately 65 and 130 kDa. These five effective strains are alternative candidates for use as a microbial insecticide for the control of the S. litura pest.
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Affiliation(s)
- Kesorn Boonmee
- 1Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand
| | - Sutticha Na-Ranong Thammasittirong
- 1Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand
- 2Microbial Biotechnology Unit, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand
| | - Anon Thammasittirong
- 1Department of Microbiology, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand
- 2Microbial Biotechnology Unit, Faculty of Liberal Arts and Science, Kasetsart University, Nakhon Pathom, 73140 Thailand
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