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Huang J, Li G, Liu B, Gao Y, Wu K, Feng H. Field evaluation the effect of two transgenic Bt maize events on predatory arthropods in the Huang-Huai-Hai summer maize-growing region of China. ENVIRONMENTAL ENTOMOLOGY 2024; 53:398-405. [PMID: 38513706 DOI: 10.1093/ee/nvae021] [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: 07/25/2023] [Revised: 02/18/2024] [Accepted: 03/05/2024] [Indexed: 03/23/2024]
Abstract
To illustrate the impact of genetically modified (GM) Bt maize on the natural enemy communities in the Huang-Huai-Hai summer maize-growing region in China, the abundance of 7 common predator taxa (Geocoris pallidipennis Costa, Harmonia axyridis (Pallas), lacewings, Orius sauteri (Poppius), Propylea japonica (Thunberg), spiders, and Staphylinidae) was quantitatively evaluated by comparing Bt-Cry1Ab DBN9936 and Bt-Cry1Ab/Cry2Aj Ruifeng 125 events to their near non-Bt isolines during the growing season from 2016 to 2019. A total of 10,302, 19,793, 13,536, and 5,672 individuals were observed during 4 years, and the abundance of each taxa on Bt maize varied between sample dates among those arthropod taxa. Shannon-Wiener diversity index of predator communities from 7 taxa showed very similar temporal dynamics and principal response curve analyses to examine community-level effects showed no significant differences in predator abundance in Bt maize compared with non-Bt maize. We conclude that the 2 Bt maize hybrids did not adversely affect the predator community in the Huang-Huai-Hai summer maize-growing region of China.
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Affiliation(s)
- Jianrong Huang
- Henan Key Laboratory of Crop Pest Control, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, International Joint Research Laboratory for Crop Protection of Henan, No. 0 Entomological Radar Field Scientific Observation and Research Station of Henan Province, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002 Henan, China
| | - Guoping Li
- Henan Key Laboratory of Crop Pest Control, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, International Joint Research Laboratory for Crop Protection of Henan, No. 0 Entomological Radar Field Scientific Observation and Research Station of Henan Province, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002 Henan, China
| | - Bing Liu
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yu Gao
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Kongming Wu
- State Key Laboratory of Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hongqiang Feng
- Henan Key Laboratory of Crop Pest Control, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, International Joint Research Laboratory for Crop Protection of Henan, No. 0 Entomological Radar Field Scientific Observation and Research Station of Henan Province, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou, 450002 Henan, China
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Diao F, Li Y, Gao X, Luo J, Zhu X, Wang L, Zhang K, Li D, Ji J, Cui J. Response of the Propylea japonica Microbiota to Treatment with Cry1B Protein. Genes (Basel) 2023; 14:2008. [PMID: 38002951 PMCID: PMC10671136 DOI: 10.3390/genes14112008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/26/2023] Open
Abstract
Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) is a dominant natural enemy of insect pests in farmland ecosystems. It also serves as an important non-target insect for environmental safety evaluations of transgenic crops. Widespread planting of transgenic crops may result in direct or indirect exposure of P. japonica to recombinant Bacillus thuringiensis (Bt) protein, which may in turn affect the biological performance of this natural enemy by affecting the P. japonica microflora. However, the effects of Bt proteins (such as Cry1B) on the P. japonica microbiota are currently unclear. Here, we used a high-throughput sequencing method to investigate differences in the P. japonica microbiota resulting from treatment with Cry1B compared to a sucrose control. The results demonstrated that the P. japonica microbiome was dominated by Firmicutes at the phylum level and by Staphylococcus at the genus level. Within-sample (α) diversity indices demonstrated a high degree of consistency between the microbial communities of P. japonica treated with the sucrose control and those treated with 0.25 or 0.5 mg/mL Cry1B. Furthermore, there were no significant differences in the abundance of any taxa after treatment with 0.25 mg/mL Cry1B for 24 or 48 h, and treatment with 0.5 mg/mL Cry1B for 24 or 48 h led to changes only in Staphylococcus, a member of the phylum Firmicutes. Treatment with a high Cry1B concentration (1.0 mg/mL) for 24 or 48 h caused significant changes in the abundance of specific taxa (e.g., Gemmatimonades, Patescibacteria, Thauera, and Microbacterium). However, compared with the control, most taxa remained unchanged. The statistically significant differences may have been due to the stimulatory effects of treatment with a high concentration of Cry1B. Overall, the results showed that Cry1B protein could alter endophytic bacterial community abundance, but not composition, in P. japonica. The effects of Bt proteins on endophytes and other parameters in non-target insects require further study. This study provides data support for the safety evaluation of transgenic plants.
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Affiliation(s)
- Fengchao Diao
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (F.D.); (X.G.); (J.L.); (J.J.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Yarong Li
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Xueke Gao
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (F.D.); (X.G.); (J.L.); (J.J.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Junyu Luo
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (F.D.); (X.G.); (J.L.); (J.J.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Xiangzhen Zhu
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Li Wang
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Kaixin Zhang
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Dongyang Li
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Jichao Ji
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (F.D.); (X.G.); (J.L.); (J.J.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
| | - Jinjie Cui
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (F.D.); (X.G.); (J.L.); (J.J.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton, Chinese Academy of Agricultural Sciences, Anyang 455000, China; (Y.L.); (X.Z.); (L.W.); (K.Z.); (D.L.)
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Naing ZL, Soe ET, Zhang C, Niu L, Tang J, Ding Z, Yu S, Lu J, Fang F, Liang G. Cadherin Is a Binding Protein but Not a Functional Receptor of Bacillus thuringiensis Cry2Ab in Helicoverpa armigera. Appl Environ Microbiol 2023; 89:e0062523. [PMID: 37378519 PMCID: PMC10370303 DOI: 10.1128/aem.00625-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
Midgut receptors play a critical role in the specificity of Cry toxins for individual insect species. Cadherin proteins are essential putative receptors of Cry1A toxins in lepidopteran larvae. Cry2A family members share common binding sites in Helicoverpa armigera, and one of them, Cry2Aa, has been widely reported to interact with midgut cadherin. Here, we studied the binding interaction and functional role of H. armigera cadherin in the mechanism of Cry2Ab toxicity. A region spanning from cadherin repeat 6 (CR6) to the membrane-proximal region (MPR) of cadherin protein was produced as six overlapping peptides to identify the specific binding regions of Cry2Ab. Binding assays showed that Cry2Ab binds nonspecifically to peptides containing CR7 and CR11 regions in a denatured state but binds specifically only to CR7-containing peptides in the native state. The peptides CR6-11 and CR6-8 were transiently expressed in Sf9 cells to assess the functional role of cadherin. Cytotoxicity assays showed that Cry2Ab is not toxic to the cells expressing any of the cadherin peptides. However, ABCA2-expressing cells showed high sensitivity to Cry2Ab toxin. Neither increased nor decreased sensitivity to Cry2Ab was observed when the peptide CR6-11 was coexpressed with the ABCA2 gene in Sf9 cells. Instead, treating ABCA2-expressing cells with a mixture of Cry2Ab and CR6-8 peptides resulted in significantly reduced cell death compared with treatment with Cry2Ab alone. Moreover, silencing of the cadherin gene in H. armigera larvae showed no significant effect on Cry2Ab toxicity, in contrast to the reduced mortality in ABCA2-silenced larvae. IMPORTANCE To improve the efficiency of production of a single toxin in crops and to delay the evolution of insect resistance to the toxin, the second generation of Bt cotton, expressing Cry1Ac and Cry2Ab, was introduced. Understanding the mode action of the Cry proteins in the insect midgut and the mechanisms insects use to overcome these toxins plays a crucial role in developing measures to counter them. Extensive studies have been conducted on the receptors of Cry1A toxins, but relatively little has been done about those of Cry2Ab. By showing the nonfunctional binding of cadherin protein with Cry2Ab, we have furthered the understanding of Cry2Ab receptors.
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Affiliation(s)
- Zaw Lin Naing
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Ei Thinzar Soe
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Caihong Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Linlin Niu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Jinrong Tang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Zhongwei Ding
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Siqi Yu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Jie Lu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Fengyun Fang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
| | - Gemei Liang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, People’s Republic of China
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Feng H, Chen W, Hussain S, Shakir S, Tzin V, Adegbayi F, Ugine T, Fei Z, Jander G. Horizontally transferred genes as RNA interference targets for aphid and whitefly control. PLANT BIOTECHNOLOGY JOURNAL 2023; 21:754-768. [PMID: 36577653 PMCID: PMC10037149 DOI: 10.1111/pbi.13992] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/14/2022] [Accepted: 12/22/2022] [Indexed: 06/01/2023]
Abstract
RNA interference (RNAi)-based technologies are starting to be commercialized as a new approach for agricultural pest control. Horizontally transferred genes (HTGs), which have been transferred into insect genomes from viruses, bacteria, fungi or plants, are attractive targets for RNAi-mediated pest control. HTGs are often unique to a specific insect family or even genus, making it unlikely that RNAi constructs targeting such genes will have negative effects on ladybugs, lacewings and other beneficial predatory insect species. In this study, we sequenced the genome of a red, tobacco-adapted isolate of Myzus persicae (green peach aphid) and bioinformatically identified 30 HTGs. We then used plant-mediated virus-induced gene silencing (VIGS) to show that several HTGs of bacterial and plant origin are important for aphid growth and/or survival. Silencing the expression of fungal-origin HTGs did not affect aphid survivorship but decreased aphid reproduction. Importantly, although there was uptake of plant-expressed RNA by Coccinella septempunctata (seven-spotted ladybugs) via the aphids that they consumed, we did not observe negative effects on ladybugs from aphid-targeted VIGS constructs. To demonstrate that this approach is more broadly applicable, we also targeted five Bemisia tabaci (whitefly) HTGs using VIGS and demonstrated that knockdown of some of these genes affected whitefly survival. As functional HTGs have been identified in the genomes of numerous pest species, we propose that these HTGs should be explored further as efficient and safe targets for control of insect pests using plant-mediated RNA interference.
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Affiliation(s)
| | - Wenbo Chen
- Boyce Thompson InstituteIthacaNYUSA
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Sonia Hussain
- Boyce Thompson InstituteIthacaNYUSA
- Present address:
National Institute for Biotechnology and Genetic Engineering CollegePakistan Institute of Engineering and Applied SciencesFaisalabadPakistan
| | - Sara Shakir
- Boyce Thompson InstituteIthacaNYUSA
- Present address:
Gembloux Agro‐Bio Tech InstituteThe University of LiegeGemblouxBelgium
| | - Vered Tzin
- Boyce Thompson InstituteIthacaNYUSA
- Present address:
Jacob Blaustein Institutes for Desert ResearchBen‐Gurion University of the NegevSede BoqerIsrael
| | - Femi Adegbayi
- Boyce Thompson InstituteIthacaNYUSA
- Present address:
Drexel University College of MedicinePhiladelphiaPAUSA
| | - Todd Ugine
- Department of EntomologyCornell UniversityIthacaNYUSA
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Soe ET, Naing ZL, Zhang C, Niu LL, Tang J, Yu S, Ding Z, Liang G. Cry51Aa Proteins Are Active against Apolygus lucorum and Show a Mechanism Similar to Pore Formation Model. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2279-2289. [PMID: 36710440 DOI: 10.1021/acs.jafc.2c07244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Reduced insecticide spray in crop fields due to the widespread adoption of Bacillus thuringiensis (Bt) crops has favored the population increases of mirid bugs. Cry51Aa proteins are new types of Bt proteins that belong to aerolysin-like β pore-forming proteins with insecticidal activity against hemipteran and coleopteran pests. Here, we studied the activity of Bt Cry51Aa1 and Cry51Aa2 against Apolygus lucorum, an emerging pest in cotton, and their mechanism of action. Cry51Aa1 exhibited almost 5-fold higher toxicity than Cry51Aa2 with LC50 of 11.87 and 61.34 μg/mL, respectively. Protoxins could be activated both in vitro, by trypsin and midgut contents, and in vivo, by A. lucorum midgut. Both Cry51Aa protoxins were processed in two steps, producing pre-activated (∼30 kDa) and final activated (∼25-28 kDa) proteins. Cry51Aa proteins bound to a 25 kDa midgut protein, and Cry51Aa2 showed 2 times higher binding affinity than Cry51Aa1. Incubating Cry51Aa proteins with midgut homogenate resulted in toxin oligomers of 150-200 kDa. Our findings provide a theoretical basis for using Cry51Aa proteins to control A. lucorum and a better understanding of their mode of action.
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Affiliation(s)
- Ei Thinzar Soe
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Zaw Lin Naing
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Caihong Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Lin Lin Niu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Jinrong Tang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Siqi Yu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Zhongwei Ding
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
| | - Gemei Liang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, West Yuanmingyuan Road, Beijing 100193, People Republic of China
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Cappa F, Baracchi D, Cervo R. Biopesticides and insect pollinators: Detrimental effects, outdated guidelines, and future directions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155714. [PMID: 35525339 DOI: 10.1016/j.scitotenv.2022.155714] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/29/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
As synthetic pesticides play a major role in pollinator decline worldwide, biopesticides have been gaining increased attention to develop more sustainable methods for pest management in agriculture. These biocontrol agents are usually considered as safe for non-target species, such as pollinators. Unfortunately, when it comes to non-target insects, only the acute or chronic effects on survival following exposure to biopesticides are tested. Although international boards have highlighted the need to include also behavioral and morphophysiological traits when assessing risks of plant protection products on pollinators, no substantial concerns have been raised about the risks associated with sublethal exposure to these substances. Here, we provide a comprehensive review of the studies investigating the potential adverse effects of biopesticides on different taxa of pollinators (bees, butterflies, moths, beetles, flies, and wasps). We highlight the fragmentary knowledge on this topic and the lack of a systematic investigation of these negative effects of biopesticides on insect pollinators. We show that all the major classes of biopesticides, besides their direct toxicity, can also cause a plethora of more subtle detrimental effects in both solitary and social species of pollinators. Although research in this field is growing, the current risk assesment approach does not suffice to properly assess all the potential side-effects that these agents of control may have on pollinating insects. Given the urgent need for a sustainable agriculture and wildlife protection, it appears compelling that these so far neglected detrimental effects should be thoroughly assessed before allegedly safe biopesticides can be used in the field and, in this view, we provide a perspective for future directions.
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Affiliation(s)
- Federico Cappa
- Department of Biology, University of Florence, Via Madonna del Piano, 6, 50019 Sesto Fiorentino, Italy.
| | - David Baracchi
- Department of Biology, University of Florence, Via Madonna del Piano, 6, 50019 Sesto Fiorentino, Italy
| | - Rita Cervo
- Department of Biology, University of Florence, Via Madonna del Piano, 6, 50019 Sesto Fiorentino, Italy
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Chengrong N, Jianwu W, Shiming L, Peng Z, Guo J, Xin M. Spatial and temporal distribution of Bt proteins in Bt maize leaves. FOOD AGR IMMUNOL 2021. [DOI: 10.1080/09540105.2021.1960956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- Nie Chengrong
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou, People’s Republic of China
- Institute of Crop Genetics and Breeding, Foshan University, Foshan, People’s Republic of China
- South China Research and Development Center for food safety, Foshan University, Foshan, People’s Republic of China
| | - Wang Jianwu
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou, People’s Republic of China
| | - Luo Shiming
- Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou, People’s Republic of China
| | - Zhenshan Peng
- Institute of Crop Genetics and Breeding, Foshan University, Foshan, People’s Republic of China
| | - Jingwen Guo
- Institute of Crop Genetics and Breeding, Foshan University, Foshan, People’s Republic of China
| | - Meiguo Xin
- Institute of Crop Genetics and Breeding, Foshan University, Foshan, People’s Republic of China
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Marques LH, Lepping M, Castro BA, Santos AC, Rossetto J, Nunes MZ, Silva OABN, Moscardini VF, de Sá VGM, Nowatzki T, Dahmer ML, Gontijo PC. Field efficacy of Bt cotton containing events DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 against lepidopteran pests and impact on the non-target arthropod community in Brazil. PLoS One 2021; 16:e0251134. [PMID: 33945577 PMCID: PMC8096009 DOI: 10.1371/journal.pone.0251134] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 04/21/2021] [Indexed: 11/19/2022] Open
Abstract
The efficacy and non-target arthropod effects of transgenic DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 Bt cotton, expressing proteins Cry1Ac, Cry1F and Vip3Aa19, was examined through field trials in Brazil. Fifteen field efficacy experiments were conducted from 2014 through the 2020 growing season across six different states in Brazil to evaluate performance against key lepidopteran pests through artificial infestations of Chrysodeixis includens (Walker), Spodoptera frugiperda (J.E. Smith,1797), Spodoptera cosmioides (Walker, 1858) and Chloridea virescens (F., 1781), and natural infestations of Alabama argillacea (Hübner) and S. frugiperda. The impact of this Bt cotton technology on the non-target arthropod community in Brazilian cotton production systems was also assessed in a multi-site experiment. DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 cotton significantly reduced the feeding damage caused by S. frugiperda, S. cosmioides, C. includens, C. virescens and A. argillacea, causing high levels of mortality (greater than 99%) to all target lepidopteran pests evaluated during vegetative and/or reproductive stages of crop development. Non-target arthropod community-level analyses confirmed no unintended effects on the arthropod groups monitored. These results demonstrate the value of transgenic Bt cotton containing event DAS-21023-5 × DAS-24236-5 × SYN-IR102-7 for consideration as part of an integrated approach for managing key lepidopteran pests in Brazilian cotton production systems.
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Affiliation(s)
| | - Miles Lepping
- Corteva Agriscience, Indianapolis, Indiana, United States of America
| | - Boris A. Castro
- Corteva Agriscience, Indianapolis, Indiana, United States of America
| | | | | | | | | | | | | | | | - Mark L. Dahmer
- Corteva Agriscience, Johnston, Iowa, United States of America
| | - Pablo C. Gontijo
- Instituto Federal Goiano, Campus Rio Verde, Rio Verde, Goiás, Brazil
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Souza CSF, Silveira LCP, Souza BHS, Nascimento PT, Damasceno NCR, Mendes SM. Efficiency of biological control for fall armyworm resistant to the protein Cry1F. BRAZ J BIOL 2020; 81:154-163. [PMID: 32159617 DOI: 10.1590/1519-6984.224774] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Accepted: 10/08/2019] [Indexed: 11/22/2022] Open
Abstract
Understanding the ecological and toxicological relationship between genetically modified cultivars (GM) and biological control agents is of great importance for discussions related to the compatability of GM cultivars and integrated management strategies for pest resistance. The present study evaluated the search behavior and predatory capacity of Orius insidiosus (Say) (Hemiptera: Anthocoridae) and Doru luteipes (Scudder) (Dermaptera: Forficulidae) on eggs and caterpillars of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) resistant or not to the protein Cry1F expressed in Bt corn. To determine the search time, a stopwatch was run until the capture of the first prey, predation capacity was evaluated by counting the prey remaining after 24 hours of infestation. The injuries of S. frugiperda in genetically modified and conventional corn in the presence and absence of predators was also evaluated. The predators were not able to distinguish between resistant and susceptible prey (eggs or caterpillars), given the predatory behaviour observed. There was no difference in searching time or predatory capacity between the predators for eggs and caterpillars of either resistant or susceptible S. frugiperda. In the presence of predators, the injury scores for resistant S. frugiperda on the Bt corn plants were lower. It was concluded that O. insidiosus and D. luteipes did not notice the presence of the protein Cry1F in the prey S. frugiperda, which may facilitate the combined use of GM corn and biological control in integrated management programs and for management of pest resistance.
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Affiliation(s)
- C S F Souza
- Departamento de Entomologia, Universidade Federal de Lavras - UFLA, Campus Universitario, CP 3037, CEP 37200-000, Lavras, MG, Brasil
| | - L C P Silveira
- Departamento de Entomologia, Universidade Federal de Lavras - UFLA, Campus Universitario, CP 3037, CEP 37200-000, Lavras, MG, Brasil
| | - B H S Souza
- Departamento de Entomologia, Universidade Federal de Lavras - UFLA, Campus Universitario, CP 3037, CEP 37200-000, Lavras, MG, Brasil
| | - P T Nascimento
- Departamento de Entomologia, Universidade Federal de Lavras - UFLA, Campus Universitario, CP 3037, CEP 37200-000, Lavras, MG, Brasil
| | - N C R Damasceno
- Centro Universitário de Sete Lagoas - UNIFEMM, Av. Marechal Castelo Branco, 2765, Santo Antonio, CEP 35701-242, Sete Lagoas, MG, Brasil
| | - S M Mendes
- Centro Nacional de Pesquisa de Milho e Sorgo - CNPMS, Rodovia MG 424, Km 45, CP 285, CEP 35701-970, Sete Lagoas, MG, Brasil
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10
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Akbar W, Gowda A, Ahrens JE, Stelzer JW, Brown RS, Bollman SL, Greenplate JT, Gore J, Catchot AL, Lorenz G, Stewart SD, Kerns DL, Greene JK, Toews MD, Herbert DA, Reisig DD, Sword GA, Ellsworth PC, Godfrey LD, Clark TL. First transgenic trait for control of plant bugs and thrips in cotton. PEST MANAGEMENT SCIENCE 2019; 75:867-877. [PMID: 30324740 PMCID: PMC6590345 DOI: 10.1002/ps.5234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 10/01/2018] [Accepted: 10/08/2018] [Indexed: 05/10/2023]
Abstract
BACKGROUND Plant bugs (Lygus spp.) and thrips (Thrips spp.) are two of the most economically important insect pest groups impacting cotton production in the USA today, but are not controlled by current transgenic cotton varieties. Thus, seed or foliar-applied chemical insecticides are typically required to protect cotton from these pest groups. Currently, these pests are resistant to several insecticides, resulting in fewer options for economically viable management. Previous publications documented the efficacy of transgenic cotton event MON 88702 against plant bugs and thrips in limited laboratory and field studies. Here, we report results from multi-location and multi-year field studies demonstrating efficacy provided by MON 88702 against various levels of these pests. RESULTS MON 88702 provided a significant reduction in numbers of Lygus nymphs and subsequent yield advantage. MON 88702 also had fewer thrips and minimal injury. The level of control demonstrated by this transgenic trait was significantly better compared with its non-transgenic near-isoline, DP393, receiving insecticides at current commercial rates. CONCLUSION The level of efficacy demonstrated here suggests that MON 88702, when incorporated into existing IPM programs, could become a valuable additional tool for management of Lygus and thrips in cotton agroecosystems experiencing challenges of resistance to existing chemical control strategies. © 2018 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | | | | | | | | | | | | | - Jeffrey Gore
- The Department of Biochemistry, Molecular Biology, Entomology, & Plant PathologyMississippi State UniversityStonevilleMSUSA
| | - Angus L Catchot
- The Department of Biochemistry, Molecular Biology, Entomology, & Plant PathologyMississippi State UniversityStonevilleMSUSA
| | - Gus Lorenz
- Department of EntomologyUniversity of ArkansasFayatvilleNCUSA
| | - Scott D Stewart
- Department of Entomology and Plant PathologyUniversity of TennesseeJacksonTNUSA
| | - David L Kerns
- Department of EntomologyLouisiana State UniversityWinnsboroLAUSA
| | - Jeremy K Greene
- Department of Plant and Environmental SciencesClemson UniversityClemsonSAUSA
| | | | - David A Herbert
- Department of EntomologyVirginia Tech UniversitySuffolkVAUSA
| | - Dominic D Reisig
- Department of Entomology and Plant PathologyNorth Carolina State UniversityPlymouthNCUSA
| | - Gregory A Sword
- Department of EntomologyTexas A&M UniversityCollege StationTXUSA
| | | | - Larry D Godfrey
- Department of Entomology and NematologyUniversity of California DavisDavisCAUSA
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11
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Anderson JA, Ellsworth PC, Faria JC, Head GP, Owen MDK, Pilcher CD, Shelton AM, Meissle M. Genetically Engineered Crops: Importance of Diversified Integrated Pest Management for Agricultural Sustainability. Front Bioeng Biotechnol 2019; 7:24. [PMID: 30842944 PMCID: PMC6391707 DOI: 10.3389/fbioe.2019.00024] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 01/30/2019] [Indexed: 11/13/2022] Open
Abstract
As the global population continues to expand, utilizing an integrated approach to pest management will be critically important for food security, agricultural sustainability, and environmental protection. Genetically engineered (GE) crops that provide protection against insects and diseases, or tolerance to herbicides are important tools that complement a diversified integrated pest management (IPM) plan. However, despite the advantages that GE crops may bring for simplifying the approach and improving efficiency of pest and weed control, there are also challenges for successful implementation and sustainable use. This paper considers how several GE traits, including those that confer protection against insects by expression of proteins from Bacillus thuringiensis (Bt), traits that confer tolerance to herbicides, and RNAi-based traits that confer resistance to viral pathogens, can be key elements of a diversified IPM plan for several different crops in both developed and developing countries. Additionally, we highlight the importance of community engagement and extension, strong partnership between industry, regulators and farmers, and education and training programs, for achieving long-term success. By leveraging the experiences gained with these GE crops, understanding the limitations of the technology, and considering the successes and failures of GE traits in IPM plans for different crops and regions, we can improve the sustainability and versatility of IPM plans that incorporate these and future technologies.
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Affiliation(s)
- Jennifer A Anderson
- Corteva Agriscience, Agriculture Division of DowDuPont, Johnston, IA, United States
| | - Peter C Ellsworth
- Department of Entomology, Maricopa Agricultural Center, University of Arizona, Maricopa, AZ, United States
| | - Josias C Faria
- Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Santo Antônio de Goiás, Brazil
| | | | - Micheal D K Owen
- Agronomy Department, Iowa State University, Ames, IA, United States
| | - Clinton D Pilcher
- Corteva Agriscience, Agriculture Division of DowDuPont, Johnston, IA, United States
| | - Anthony M Shelton
- Department of Entomology, New York State Agricultural Experiment Station (NYSAES), Cornell University, Geneva, NY, United States
| | - Michael Meissle
- Research Division Agroecology and Environment, Agroscope, Zurich, Switzerland
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12
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Tian JC, Wang GW, Han HL, Romeis J, Zhang FC, Ye GY, Xie MC, Wang GY, Lu ZX. The rice planthopper parasitoid Anagrus nilaparvatae is not at risk when feeding on honeydew derived from Bacillus thuringiensis (Bt) rice. PEST MANAGEMENT SCIENCE 2018; 74:1854-1860. [PMID: 29427309 DOI: 10.1002/ps.4886] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/29/2018] [Accepted: 02/04/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Honeydew is a sugar-rich excretion produced by sap-feeding Sternorrhyncha and is an important source of carbohydrates for natural enemies, especially for parasitoids. Honeydew derived from genetically modified (GM) crops can contain amounts of the transgene product. Thus, it is a possible route of exposure for natural enemies feeding on honeydew. In the present study, the potential effects of Nilaparvata lugens honeydew derived from Cry1C and Cry2A rice on different life-table parameters and parasitism dynamics of the egg parasitoid Anagrus nilaparvatae were evaluated under laboratory and field conditions. Furthermore, the Bacillus thuringiensis (Bt) levels and the sugar and amino acid composition of honeydew were analyzed. RESULTS Results indicated that A. nilaparvatae was exposed to Bt proteins by feeding on N. lugens honeydew produced from Bt rice. However, honeydew derived from the tested Cry1C and Cry2A rice lines did not affect the development, longevity, emergence rate and fecundity of A. nilaparvatae. Also, the parasitism dynamics in the field remained unaffected. In addition, the sugar and amino acid composition of N. lugens honeydew was not significantly altered for the tested Bt rice lines compared with the parental non-Bt plant. CONCLUSION The quality of honeydew derived from the tested Bt rice lines as a food resource for natural enemies was maintained. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Jun-Ce Tian
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Geng-Wei Wang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Hai-Liang Han
- Experimental Station of Mid-Zhejiang Area, Dongyang Institute of Maize, Zhejiang Academy of Agricultural Sciences, Dongyang, China
| | - Jörg Romeis
- Agroscope, Research Division Agroecology and Environment, Zurich, Switzerland
| | | | - Gong-Yin Ye
- State Key Laboratory of Rice Biology and Ministry of Agriculture Key Laboratory of Agricultural Entomology, Institute of Insect Sciences, Zhejiang University, Hangzhou, China
| | | | - Gui-Yue Wang
- Experimental Station of Mid-Zhejiang Area, Dongyang Institute of Maize, Zhejiang Academy of Agricultural Sciences, Dongyang, China
| | - Zhong-Xian Lu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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13
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Rocha-Munive MG, Soberón M, Castañeda S, Niaves E, Scheinvar E, Eguiarte LE, Mota-Sánchez D, Rosales-Robles E, Nava-Camberos U, Martínez-Carrillo JL, Blanco CA, Bravo A, Souza V. Evaluation of the Impact of Genetically Modified Cotton After 20 Years of Cultivation in Mexico. Front Bioeng Biotechnol 2018; 6:82. [PMID: 29988354 PMCID: PMC6023983 DOI: 10.3389/fbioe.2018.00082] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/31/2018] [Indexed: 11/16/2022] Open
Abstract
For more than 20 years cotton has been the most widely sown genetically modified (GM) crop in Mexico. Its cultivation has fulfilled all requirements and has gone through the different regulatory stages. During the last 20 years, both research-institutions and biotech-companies have generated scientific and technical information regarding GM cotton cultivation in Mexico. In this work, we collected data in order to analyze the environmental and agronomic effects of the use of GM cotton in Mexico. In 1996, the introduction of Bt cotton made it possible to reactivate this crop, which in previous years was greatly reduced due to pest problems, production costs and environmental concerns. Bt cotton is a widely accepted tool for cotton producers and has proven to be efficient for the control of lepidopteran pests. The economic benefits of its use are variable, and depend on factors such as the international cotton-prices and other costs associated with its inputs. So far, the management strategies used to prevent development of insect resistance to GM cotton has been successful, and there are no reports of insect resistance development to Bt cotton in Mexico. In addition, no effects have been observed on non-target organisms. For herbicide tolerant cotton, the prevention of herbicide resistance has also been successful since unlike other countries, the onset of resistance weeds is still slow, apparently due to cultural practices and rotation of different herbicides. Environmental benefits have been achieved with a reduction in chemical insecticide applications and the subsequent decrease in primary pest populations, so that the inclusion of other technologies—e.g., use of non-Bt cotton- can be explored. Nevertheless, control measures need to be implemented during transport of the bolls and fiber to prevent dispersal of volunteer plants and subsequent gene flow to wild relatives distributed outside the GM cotton growing areas. It is still necessary to implement national research programs, so that biotechnology and plant breeding advances can be used in the development of cotton varieties adapted to the Mexican particular environmental conditions and to control insect pests of regional importance.
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Affiliation(s)
- Martha G Rocha-Munive
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Mario Soberón
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Saúl Castañeda
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Esteban Niaves
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Enrique Scheinvar
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Luis E Eguiarte
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - David Mota-Sánchez
- Department of Entomology, Michigan State University, East Lansing, MI, United States
| | | | - Urbano Nava-Camberos
- Facultad de Agricultura y Zootecnia/Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Gómez Palacio, Mexico
| | | | - Carlos A Blanco
- Biology Department, University of New Mexico, Albuquerque, NM, United States
| | - Alejandra Bravo
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Valeria Souza
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
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14
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Zhao M, Li Y, Yuan X, Liang G, Wang B, Liu C, Khaing MM. Establishment of a dietary exposure assay for evaluating the toxicity of insecticidal compounds to Apolygus lucorum (Hemiptera: Miridae). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 237:414-423. [PMID: 29502004 DOI: 10.1016/j.envpol.2018.01.012] [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: 04/01/2017] [Revised: 11/16/2017] [Accepted: 01/05/2018] [Indexed: 06/08/2023]
Abstract
With the commercialization of transgenic cotton that expresses Bt (Bacillus thuringiensis) insecticidal proteins, mirid bugs have become key pests in cotton and maize fields in China. Genetically engineered (GE) crops for controlling mirids are unavailable owing to a lack of suitable insecticidal genes. In this study, we developed and validated a dietary exposure assay for screening insecticidal compounds and for assessing the potential effects of insecticidal proteins produced by GE plants on Apolygus lucorum, one of the main mirid pests of Bt cotton and Bt maize. Diets containing potassium arsenate (PA) or the cysteine protease inhibitor E-64 were used as positive controls for validating the efficacy of the dietary exposure assay. The results showed that with increasing concentrations of PA or E-64, A. lucorum larval development time was prolonged and adult weight and fecundity were decreased, suggesting that the dietary exposure assay was useful for detecting the toxicity of insecticidal compounds to A. lucorum. This assay was then used to assess the toxicity of Cry1Ab, Cry1Ac, Cry1F, Cry2Aa, and Cry2Ab proteins, which have been transformed into several crops, against A. lucorum. The results showed that A. lucorum did not show a negative effect by feeding on an artificial diet containing any of the purified Cry proteins. No significant changes in the activities of digestive, detoxifying, or antioxidant enzymes were detected in A. lucorum that fed on a diet containing Cry proteins, but A. lucorum fitness was reduced when the insect fed on a diet containing E-64 or PA. These results demonstrate that A. lucorum is not sensitive to the tested Cry proteins and that the dietary exposure assay is useful for evaluating the toxicity of insecticidal compounds to this species.
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Affiliation(s)
- Man Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Yunhe Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Xiangdong Yuan
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Gemei Liang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
| | - Bingjie Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Chen Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Myint Myint Khaing
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
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15
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Sakthivel S, Habeeb SKM, Raman C. Screening of broad spectrum natural pesticides against conserved target arginine kinase in cotton pests by molecular modeling. J Biomol Struct Dyn 2018; 37:1022-1042. [DOI: 10.1080/07391102.2018.1447514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Seethalakshmi Sakthivel
- Entomoinformatics Lab, School of Bioengineering, SRM University, Kattankulathur, Tamilnadu 603203, India
- Department of Genetic Engineering, School of Bioengineering, SRM University, Kattankulathur, Tamilnadu 603203, India
| | - S. K. M. Habeeb
- Entomoinformatics Lab, School of Bioengineering, SRM University, Kattankulathur, Tamilnadu 603203, India
- Department of Genetic Engineering, School of Bioengineering, SRM University, Kattankulathur, Tamilnadu 603203, India
| | - Chandrasekar Raman
- Department of Biochemistry and Molecular Biophysics, Kansas State University, Manhattan, KS 66506, USA
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16
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Bt cotton producing Cry1Ac and Cry2Ab does not harm two parasitoids, Cotesia marginiventris and Copidosoma floridanum. Sci Rep 2018; 8:307. [PMID: 29321488 PMCID: PMC5762887 DOI: 10.1038/s41598-017-18620-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 12/06/2017] [Indexed: 11/29/2022] Open
Abstract
Cabbage looper, Trichoplusia ni (Hübner) is an important lepidopteran pest on many vegetable and greenhouse crops, and some field crops. Although there are no commercial transgenic Bt vegetable or greenhouse crops, T. ni is a target of Bollgard II cotton, which produces Cry1Ac and Cry2Ab. We expand on previous work that examined the effect of Bt crops on parasitoids using Bt-resistant lepidopteran populations as hosts. Cry1Ac/Cry2Ab-resistant T. ni larvae were used to eliminate host quality effects and to evaluate the direct effects of Bt cotton on the parasitoids Copidosoma floridanum (Ashmead) and Cotesia marginiventris (Cresson). These tri-trophic studies confirm that Bt cotton had no significant impact on development, success of parasitism, survival and adult longevity of C. marginiventris when using Bt-resistant T. ni fed on Bt cotton. Similarly, this Bt cotton had no significant impact on the development, mummy weight and the number of progeny produced by C. floridanum. Our studies verified that lyophilized Bt crop tissue maintained its insecticidal bioactivity when incorporated into an artificial diet, demonstrating that hosts and parasitoids were exposed to active Cry proteins. The egg-larval parasitoid C. floridanum, or similar species that consume their entire host, should be considered useful surrogates in risk assessment of Bt crops to non-target arthropods.
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Martinez M, Santamaria ME, Diaz-Mendoza M, Arnaiz A, Carrillo L, Ortego F, Diaz I. Phytocystatins: Defense Proteins against Phytophagous Insects and Acari. Int J Mol Sci 2016; 17:E1747. [PMID: 27775606 PMCID: PMC5085774 DOI: 10.3390/ijms17101747] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/11/2016] [Accepted: 10/12/2016] [Indexed: 01/31/2023] Open
Abstract
This review deals with phytocystatins, focussing on their potential role as defence proteins against phytophagous arthropods. Information about the evolutionary, molecular and biochemical features and inhibitory properties of phytocystatins are presented. Cystatin ability to inhibit heterologous cysteine protease activities is commented on as well as some approaches of tailoring cystatin specificity to enhance their defence function towards pests. A general landscape on the digestive proteases of phytophagous insects and acari and the remarkable plasticity of their digestive physiology after feeding on cystatins are highlighted. Biotechnological approaches to produce recombinant cystatins to be added to artificial diets or to be sprayed as insecticide-acaricide compounds and the of use cystatins as transgenes are discussed. Multiple examples and applications are included to end with some conclusions and future perspectives.
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Affiliation(s)
- Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
| | - Maria Estrella Santamaria
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
| | - Mercedes Diaz-Mendoza
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
| | - Ana Arnaiz
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
| | - Laura Carrillo
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
| | - Felix Ortego
- Departamento de Biologia Medioambiental, Centro de Investigaciones Biologicas, CSIC, Ramiro de Maeztu, 9, Madrid 28040, Spain.
| | - Isabel Diaz
- Centro de Biotecnologia y Genomica de Plantas, Universidad Politecnica de Madrid (UPM), Instituto Nacional de Investigacion y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo, Pozuelo de Alarcon, Madrid 28223, Spain.
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18
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Trapero C, Wilson IW, Stiller WN, Wilson LJ. Enhancing Integrated Pest Management in GM Cotton Systems Using Host Plant Resistance. FRONTIERS IN PLANT SCIENCE 2016; 7:500. [PMID: 27148323 PMCID: PMC4840675 DOI: 10.3389/fpls.2016.00500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/29/2016] [Indexed: 05/12/2023]
Abstract
Cotton has lost many ancestral defensive traits against key invertebrate pests. This is suggested by the levels of resistance to some pests found in wild cotton genotypes as well as in cultivated landraces and is a result of domestication and a long history of targeted breeding for yield and fiber quality, along with the capacity to control pests with pesticides. Genetic modification (GM) allowed integration of toxins from a bacteria into cotton to control key Lepidopteran pests. Since the mid-1990s, use of GM cotton cultivars has greatly reduced the amount of pesticides used in many cotton systems. However, pests not controlled by the GM traits have usually emerged as problems, especially the sucking bug complex. Control of this complex with pesticides often causes a reduction in beneficial invertebrate populations, allowing other secondary pests to increase rapidly and require control. Control of both sucking bug complex and secondary pests is problematic due to the cost of pesticides and/or high risk of selecting for pesticide resistance. Deployment of host plant resistance (HPR) provides an opportunity to manage these issues in GM cotton systems. Cotton cultivars resistant to the sucking bug complex and/or secondary pests would require fewer pesticide applications, reducing costs and risks to beneficial invertebrate populations and pesticide resistance. Incorporation of HPR traits into elite cotton cultivars with high yield and fiber quality offers the potential to further reduce pesticide use and increase the durability of pest management in GM cotton systems. We review the challenges that the identification and use of HPR against invertebrate pests brings to cotton breeding. We explore sources of resistance to the sucking bug complex and secondary pests, the mechanisms that control them and the approaches to incorporate these defense traits to commercial cultivars.
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