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Cai Z, Zhao X, Qian Y, Zhang K, Guo S, Kan Y, Wang Y, Ayra-Pardo C, Li D. Transcriptomic and Metatranscriptomic Analyses Provide New Insights into the Response of the Pea Aphid Acyrthosiphon pisum (Hemiptera: Aphididae) to Acetamiprid. Insects 2024; 15:274. [PMID: 38667404 PMCID: PMC11050337 DOI: 10.3390/insects15040274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/07/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024]
Abstract
Acetamiprid is a broad-spectrum neonicotinoid insecticide used in agriculture to control aphids. While recent studies have documented resistance to acetamiprid in several aphid species, the underlying mechanisms are still not fully understood. In this study, we analyzed the transcriptome and metatranscriptome of a laboratory strain of the pea aphid, Acyrthosiphon pisum (Harris, 1776), with reduced susceptibility to acetamiprid after nine generations of exposure to identify candidate genes and the microbiome involved in the adaptation process. Sequencing of the transcriptome of both selected (RS) and non-selected (SS) strains allowed the identification of 14,858 genes and 4938 new transcripts. Most of the differentially expressed genes were associated with catalytic activities and metabolic pathways involving carbon and fatty acids. Specifically, alcohol-forming fatty acyl-CoA reductase (FAR) and acyl-CoA synthetase (ACSF2), both involved in the synthesis of epidermal wax layer components, were significantly upregulated in RS, suggesting that adaptation to acetamiprid involves the synthesis of a thicker protective layer. Metatranscriptomic analyses revealed subtle shifts in the microbiome of RS. These results contribute to a deeper understanding of acetamiprid adaptation by the pea aphid and provide new insights for aphid control strategies.
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Affiliation(s)
- Zhiyan Cai
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
| | - Xuhui Zhao
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
| | - Yuxin Qian
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
| | - Kun Zhang
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
| | - Shigang Guo
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
| | - Yunchao Kan
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 East of Hualan Avenue, Xinxiang 453003, China
| | - Yuqing Wang
- Scientific Research Center, Nanyang Medical College, Nanyang 473061, China;
| | - Camilo Ayra-Pardo
- CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, University of Porto, Avda. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
| | - Dandan Li
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (Z.C.); (X.Z.); (Y.Q.); (K.Z.); (S.G.); (Y.K.)
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Zhang B, Ayra-Pardo C, Liu X, Song M, Li D, Kan Y. siRNA-Mediated BmAurora B Depletion Impedes the Formation of Holocentric Square Spindles in Silkworm Metaphase BmN4 Cells. Insects 2024; 15:72. [PMID: 38276821 PMCID: PMC10817069 DOI: 10.3390/insects15010072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
Silkworm ovary-derived BmN4 cells rely on chromatin-induced spindle assembly to form microtubule-based square mitotic spindles that ensure accurate segregation of holocentric chromosomes during cell division. The chromosome passenger protein Aurora B regulates chromosomal condensation and segregation, spindle assembly checkpoint activation, and cytokinesis; however, its role in holocentric organisms needs further clarification. This study examined the architecture and dynamics of spindle microtubules during prophase and metaphase in BmN4 cells and those with siRNA-mediated BmAurora B knockdown using immunofluorescence labeling. Anti-α-tubulin and anti-γ-tubulin antibodies revealed faint γ-tubulin signals colocalized with α-tubulin in early prophase during nuclear membrane rupture, which intensified as prophase progressed. At this stage, bright regions of α-tubulin around and on the nuclear membrane surrounding the chromatin suggested the start of microtubules assembling in the microtubule-organizing centers (MTOCs). In metaphase, fewer but larger γ-tubulin foci were detected on both sides of the chromosomes. This resulted in a distinctive multipolar square spindle with holocentric chromosomes aligned at the metaphase plate. siRNA-mediated BmAurora B knockdown significantly reduced the γ-tubulin foci during prophase, impacting microtubule nucleation and spindle structure in metaphase. Spatiotemporal BmAurora B expression analysis provided new insights into the regulation of this mitotic kinase in silkworm larval gonads during gametogenesis. Our results suggest that BmAurora B is crucial for the formation of multipolar square spindles in holocentric insects, possibly through the activation of γ-tubulin ring complexes in multiple centrosome-like MTOCs.
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Affiliation(s)
- Bing Zhang
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (X.L.); (M.S.); (D.L.)
| | - Camilo Ayra-Pardo
- CIIMAR–Interdisciplinary Centre of Marine and Environmental Research, Terminal de Cruzeiros do Porto de Leixões, University of Porto, Avda. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal;
| | - Xiaoning Liu
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (X.L.); (M.S.); (D.L.)
| | - Meiting Song
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (X.L.); (M.S.); (D.L.)
| | - Dandan Li
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (X.L.); (M.S.); (D.L.)
| | - Yunchao Kan
- Henan Key Laboratory of Insect Biology in Funiu Mountain, Henan International Joint Laboratory of Insect Biology, College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, China; (X.L.); (M.S.); (D.L.)
- School of Life Science and Technology, Henan Institute of Science and Technology, 90 East of Hualan Avenue, Xinxiang 453003, China
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Tao A, Wang T, Pang F, Zheng X, Ayra-Pardo C, Huang S, Xu R, Liu F, Li J, Wei Y, Wang Z, Niu Q, Li D. Characterization of a novel chitinolytic Serratia marcescens strain TC-1 with broad insecticidal spectrum. AMB Express 2022; 12:100. [PMID: 35907065 PMCID: PMC9339060 DOI: 10.1186/s13568-022-01442-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 07/22/2022] [Indexed: 12/03/2022] Open
Abstract
The Gram-negative rod-shaped bacterium Serratia marcescens is an opportunistic pathogen of many organisms, including insects. We report the identification and optimal in vitro chitinase production conditions of a novel chitinolytic S. marcescens strain TC-1 isolated from a naturally infected white grub (Anomala corpulenta) collected from a peanut field at Nanyang city, Henan province, China. Strain identification was conducted by morphological, physiological, biochemical and molecular analyses. The amplified 16S rRNA gene of TC-1 showed a similarity greater than 99% with multiple strains of S. marcescens. Based on Neighbor-joining phylogenetic tree analysis of bacterial 16S rRNA gene sequences, TC-1 formed a clade with S. marcescens, clearly separated from other Serratia spp. The strain TC-1 showed larvicidal activities against five insect species (A. corpulenta, Plutella xylostella, Spodoptera exigua, Helicoverpa armigera, Bombyx mori) and the nematode Caenorhabditis elegans, but not against S. litura. The operating parameters of chitinase production by TC-1 were optimized by response surface methodology using a three-factor, three-level Box-Behnken experimental design. The effects of three independent variables i.e. colloidal chitin concentration (7–13 g l−1), incubation time (24–72 h) and incubation temperature (24–32 °C) on chitinase production by TC-1 were investigated. A regression model was proposed to correlate the independent variables for an optimal chitinase activity predicted as 20.946 U ml−1, using a combination of colloidal chitin concentration, incubation time and incubation temperature of 9.06 g l−1, 63.83 h and 28.12 °C, respectively. The latter agreed well with a mean chitinase activity of 20.761 ± 0.102 U ml−1 measured in the culture supernatants of TC-1 grown under similar conditions with a colloidal chitin concentration, incubation time and incubation temperature of 9 g l−1, 64 h and 28 °C, respectively. Our study revealed the S. marcescens strain TC-1 with potential as a biocontrol agent of insect pests and nematodes and demonstrated the proposed regression model's potential to guide chitinase production by this strain.
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Affiliation(s)
- Aili Tao
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Tan Wang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Fahu Pang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Xueling Zheng
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Camilo Ayra-Pardo
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Siliang Huang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China.
| | - Ruxin Xu
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Fengqin Liu
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Jiakang Li
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Yibin Wei
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Zhiqing Wang
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Qiuhong Niu
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
| | - Dandan Li
- School of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, China
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Yang L, Sun Y, Chang M, Zhang Y, Qiao H, Huang S, Kan Y, Yao L, Li D, Ayra-Pardo C. RNA Interference-Mediated Knockdown of Bombyx mori Haemocyte-Specific Cathepsin L ( Cat L)-Like Cysteine Protease Gene Increases Bacillus thuringiensis kurstaki Toxicity and Reproduction in Insect Cadavers. Toxins (Basel) 2022; 14:toxins14060394. [PMID: 35737055 PMCID: PMC9230843 DOI: 10.3390/toxins14060394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/31/2022] [Accepted: 06/03/2022] [Indexed: 12/10/2022] Open
Abstract
The silkworm’s Cat L-like gene, which encodes a lysosomal cathepsin L-like cysteine protease, is thought to be part of the insect’s innate immunity via an as-yet-undetermined mechanism. Assuming that the primary function of Cat L-like is microbial degradation in mature phagosomes, we hypothesise that the suppression of the Cat L-like gene expression would increase Bacillus thuringiensis (Bt) bacteraemia and toxicity in knockdown insects. Here, we performed a functional analysis of Cat L-like in larvae that were fed mulberry leaves contaminated with a commercial biopesticide formulation based on Bt kurstaki (Btk) (i.e., Dipel) to investigate its role in insect defence against a known entomopathogen. Exposure to sublethal doses of Dipel resulted in overexpression of the Cat L-like gene in insect haemolymph 24 and 48 h after exposure. RNA interference (RNAi)-mediated suppression of Cat L-like expression significantly increased the toxicity of Dipel to exposed larvae. Moreover, Btk replication was higher in RNAi insects, suggesting that Cat L-like cathepsin may be involved in a bacterial killing mechanism of haemocytes. Finally, our results confirm that Cat L-like protease is part of the antimicrobial defence of insects and suggest that it could be used as a target to increase the insecticidal efficacy of Bt-based biopesticides.
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Affiliation(s)
- Linlin Yang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Yanyan Sun
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Meiling Chang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Yun Zhang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Huili Qiao
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Siliang Huang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Yunchao Kan
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
- School of Life Science, Henan University, Jin Ming Avenue, Kaifeng 475004, China
| | - Lunguang Yao
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
| | - Dandan Li
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
- Correspondence: (D.L.); (C.A.-P.)
| | - Camilo Ayra-Pardo
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Henan Key Laboratory of Insect Biology in Funiu Mountain, School of Life Sciences and Agricultural Engineering, Nanyang Normal University (NYNU), Nanyang 473061, China; (L.Y.); (Y.S.); (M.C.); (Y.Z.); (H.Q.); (S.H.); (Y.K.); (L.Y.)
- Correspondence: (D.L.); (C.A.-P.)
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Pang F, Tao A, Ayra-Pardo C, Wang T, Yu Z, Huang S. Plant organ- and growth stage-diversity of endophytic bacteria with potential as biofertilisers isolated from wheat (Triticum aestivum L.). BMC Plant Biol 2022; 22:276. [PMID: 35659526 PMCID: PMC9169407 DOI: 10.1186/s12870-022-03615-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 04/21/2022] [Indexed: 05/31/2023]
Abstract
BACKGROUND Chemical fertilisers are extensively used for crop production, which may cause soil deterioration and water pollution. Endophytic bacteria with plant-growth-promoting (PGP) activities may provide a solution to sustainably improve crop yields, including in-demand staples such as wheat. However, the diversity of the PGP endophytic bacteria in wheat across plant organs and growth stages has not been thoroughly characterised. RESULTS Here, we report the isolation of endophytic bacteria from root, stem, leaf and seed of three winter wheat varieties at tillering, jointing, heading and seed-filling growth stages that were identified via 16S rRNA gene sequence analysis. Strains were screened for indole-3-acetic acid (IAA) production, potassium and phosphate solubilisation and the ability to grow on a nitrogen-free medium. Strain's capacity to stimulate various plant growth parameters, such as dry root weight, dry above-ground parts weight and plant height, was evaluated in pot trials. A total of 127 strains were randomly selected from 610 isolated endophytic bacterial cultures, representing ten genera and 22 taxa. Some taxa were organ-specific; others were growth-stage-specific. Bacillus aryabhattai, B. stratosphericus, Leclercia adecarboxylata and Pseudomonas oryzihabitans were detected as wheat endophytes for the first time. The IAA production, inorganic phosphorous solubilisation, organic phosphorus solubilisation, potassium solubilisation and growth on N-free medium were detected in 45%, 29%, 37%, 2.4% and 37.8% of the 127 strains, respectively. In pot trials, each strain showed variable effects on inoculated wheat plants regarding the evaluated growth parameters. CONCLUSIONS Wheat endophytic bacteria showed organ- and growth-stage diversity, which may reflect their adaptations to different plant tissues and seasonal variations, and differed in their PGP abilities. Bacillus was the most predominant bacterial taxa isolated from winter wheat plants. Our study confirmed wheat root as the best reservoir for screening endophytic bacteria with potential as biofertilisers.
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Affiliation(s)
- Fahu Pang
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China
| | - Aili Tao
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China
| | - Camilo Ayra-Pardo
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China
| | - Tan Wang
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China
| | - Ziwei Yu
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China
| | - Siliang Huang
- School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, 473061, Henan, People's Republic of China.
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Moran-Bertot I, Rodríguez-Cabrera L, Borras-Hidalgo O, Huang S, Kan Y, Wright DJ, Ayra-Pardo C. Correction to: Potato virus X-mediated constitutive expression of Plutella xylostella PxSDF2L1 gene in Nicotiana benthamiana confers resistance to Phytophthora parasitica var. nicotianae. BMC Plant Biol 2021; 21:554. [PMID: 34814843 PMCID: PMC8609884 DOI: 10.1186/s12870-021-03341-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Ivis Moran-Bertot
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), 10600, Havana, Cuba
| | | | - Orlando Borras-Hidalgo
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), 10600, Havana, Cuba
- Shandong Provincial Key Laboratory of Microbial Engineering, School of Biotechnology, Qi Lu University of Technology, Jinan, 250353, Shandong, People's Republic of China
| | - Siliang Huang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China
| | - Yunchao Kan
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China
| | - Denis J Wright
- Department of Life Sciences, Imperial College London, Silwood Park campus, Ascot, Berkshire, SL5 7PY, UK.
| | - Camilo Ayra-Pardo
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China.
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Moran-Bertot I, Rodríguez-Cabrera L, Borras-Hidalgo O, Huang S, Kan Y, Wright DJ, Ayra-Pardo C. Potato virus X-mediated constitutive expression of Plutella xylostella PxSDF2L1 gene in Nicotiana benthamiana confers resistance to Phytophthora parasitica var. nicotianae. BMC Plant Biol 2021; 21:78. [PMID: 33546586 PMCID: PMC7866777 DOI: 10.1186/s12870-021-02854-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/25/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The Plutella xylostella PxSDF2L1 gene was previously reported to enhance insect resistance to pathogen at high basal transcription rate. PxSDF2L1 shows similitude with the stromal cell-derived factor 2 (SDF2), an ER stress-induced chaperon protein that is highly conserved throughout animals and plants. The precise biological function of SDF2 is not clear, but its expression is required for innate immunity in plants. Here, we investigate whether a continuous expression of PxSDF2L1 in Nicotiana benthamiana can similarly confer resistance to plant pathogen, particularly, the black shank Phytophthora parasitica var. nicotianae. RESULTS The N. benthamiana plants were inoculated with agrobacteria transformed with a PVX-based binary vector carrying the PxSDF2L1 gene; similar agroinoculation experiments with a PVX vector carrying the GFP gene were used for controls. In pot trials, agroinfected N. benthamiana plants constitutively expressing PxSDF2L1 showed a significant reduction of stem disease symptoms caused by the inoculation with P. parasitica, compared with controls. CONCLUSIONS We confirm a role of PxSDF2L1 in resistance to black shank, with a potential application to engineering active resistance against this oomycete in the commercial N. tabacum species and propose its evaluation in other crop families and plant pathogens.
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Affiliation(s)
- Ivis Moran-Bertot
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), 10600, Havana, Cuba
| | | | - Orlando Borras-Hidalgo
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), 10600, Havana, Cuba
- Shandong Provincial Key Laboratory of Microbial Engineering, School of Biotechnology, Qi Lu University of Technology, Jinan, 250353, Shandong, People's Republic of China
| | - Siliang Huang
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China
| | - Yunchao Kan
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China
| | - Denis J Wright
- Department of Life Sciences, Imperial College London, Silwood Park campus, Ascot, Berkshire, SL5 7PY, UK.
| | - Camilo Ayra-Pardo
- China-UK-NYNU-RRES Joint Laboratory of Insect Biology, Nanyang Normal University (NYNU), Nanyang, 473061, Henan, People's Republic of China.
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Leng C, Ma Y, Yuan Z, Zhai H, Ding Y, Bao Y, Li H, Ayra-Pardo C, Shi H, Qiu R, Zhang H, Chen K, Kan Y, Yao L, Tian Z. Characterization of two newly emerged torque teno sus virus isolates from a large-scale pig farm in China, in 2018. Res Vet Sci 2021; 136:18-24. [PMID: 33578290 DOI: 10.1016/j.rvsc.2021.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 12/30/2020] [Accepted: 01/07/2021] [Indexed: 11/19/2022]
Abstract
Torque teno sus virus (TTSuV) infection is common in China's pig herd. Although of uncertain pathogenicity, TTSuVs have been reported as a worsening factor of other porcine diseases, including porcine circovirus associated disease (PCVAD), porcine respiratory diseases complex (PRDC) or porcine dermatitis and nephropathy syndrome (PDNS). To better understand the genetic diversity in TTSuVs, the complete genomes of two newly emerged isolates, referred to as HeN1-A9 and HeN1-A11, collected from pig samples at a large-scale pig farm in China, were analyzed. Phylogenetic relationships of TTSuV sequences separated TTSuV1 and TTSuVk2a groups and divided TTSuV1 into two major subtypes, including TTSuV1a and TTSuV1b; HeN1-A9 and HeN1-A11 strains classified into the TTSuV1a subtype. Recombination analysis demonstrated HeN1-A9 and HeN1-A11 were generated via recombination in the overlapping ORF1/ORF3 region of TTSuV1a genome, which we report for the first time. Furthermore, we found that HeN1-A9 could be replicated in cultured MARC-145 cells for 18 passages. Our findings may be useful for elucidating the characteristics and epidemic status of TTSuVs in China.
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Affiliation(s)
- Chaoliang Leng
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Yujing Ma
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Zhiqiao Yuan
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Hongyue Zhai
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Yushan Ding
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Yin Bao
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Huimin Li
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Camilo Ayra-Pardo
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Hongfei Shi
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Reng Qiu
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Hongliang Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, PR China
| | - Ke Chen
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Yunchao Kan
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Lunguang Yao
- Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Key Laboratory of Insect Biology in Funiu Mountain, China-UK-NYNU-RRes Joint Laboratory of Insect Biology, Nanyang Normal University, Nanyang, PR China
| | - Zhijun Tian
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, PR China.
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Rodríguez-de la Noval C, Rodríguez-Cabrera L, Izquierdo L, Espinosa LA, Hernandez D, Ponce M, Moran-Bertot I, Tellez-Rodríguez P, Borras-Hidalgo O, Huang S, Kan Y, Wright DJ, Ayra-Pardo C. Functional expression of a peritrophin A-like SfPER protein is required for larval development in Spodoptera frugiperda (Lepidoptera: Noctuidae). Sci Rep 2019; 9:2630. [PMID: 30796291 PMCID: PMC6385298 DOI: 10.1038/s41598-019-38734-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 01/04/2019] [Indexed: 01/20/2023] Open
Abstract
Peritrophins are associated with structural and functional integrity of peritrophic membranes (PM), structures composed of chitin and proteins. PM lines the insect midgut and has roles in digestion and protection from toxins. We report the full-length cDNA cloning, molecular characterization and functional analysis of SfPER, a novel PM peritrophin A protein, in Spodoptera frugiperda. The predicted amino acid sequence indicated SfPER's domain structure as a CMCMC-type, consisting of a signal peptide and three chitin-binding (C) domains with two intervening mucin-like (M) domains. Phylogenetic analysis determined a close relationship between SfPER and another S. frugiperda PM peritrophin partial sequence. SfPER transcripts were found in larvae and adults but were absent from eggs and pupae. Chitin affinity studies with a recombinant SfPER-C1 peritrophin A-type domain fused to SUMO/His-tag confirmed that SfPER binds to chitin. Western blots of S. frugiperda larval proteins detected different sized variants of SfPER along the PM, with larger variants found towards the posterior PM. In vivo suppression of SfPER expression did not affect susceptibility of larvae to Bacillus thuringiensis toxin, but significantly decreased pupal weight and adult emergence, possibly due to PM structural alterations impairing digestion. Our results suggest SfPER could be a novel target for insect control.
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Affiliation(s)
- Claudia Rodríguez-de la Noval
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
- Departamento de Imunologia, Instituto de Microbiologia Professor Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | | | - Laurent Izquierdo
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Luis A Espinosa
- Analytical Unit Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Daily Hernandez
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Milagro Ponce
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Ivis Moran-Bertot
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Pilar Tellez-Rodríguez
- Plant Division, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, 10600, Cuba
| | - Orlando Borras-Hidalgo
- Shandong Provincial Key Laboratory of Microbial Engineering, School of Biotechnology, Qi Lu University of Technology, Jinan, 250353, People's Republic of China
| | - Siliang Huang
- China-UK, NYNU-RRES Joint Insect Biology Laboratory, Nanyang Normal University, Henan, 473061, People's Republic of China
| | - Yunchao Kan
- China-UK, NYNU-RRES Joint Insect Biology Laboratory, Nanyang Normal University, Henan, 473061, People's Republic of China
| | - Denis J Wright
- Department of Life Sciences, Imperial College London, Silwood Park campus, Ascot, Berkshire, SL5 7PY, UK
| | - Camilo Ayra-Pardo
- China-UK, NYNU-RRES Joint Insect Biology Laboratory, Nanyang Normal University, Henan, 473061, People's Republic of China.
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10
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Portieles R, Ochagavia ME, Canales E, Silva Y, Chacón O, Hernández I, López Y, Rodríguez M, Terauchi R, Borroto C, Santos R, Bolton MD, Ayra-Pardo C, Borrás-Hidalgo O. High-throughput SuperSAGE for gene expression analysis of Nicotiana tabacum-Rhizoctonia solani interaction. BMC Res Notes 2017; 10:603. [PMID: 29162149 PMCID: PMC5697063 DOI: 10.1186/s13104-017-2934-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 11/14/2017] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVE The ubiquitous soil pathogen Rhizoctonia solani causes serious diseases in different plant species. Despite the importance of this disease, little is known regarding the molecular basis of susceptibility. SuperSAGE technology and next-generation sequencing were used to generate transcript libraries during the compatible Nicotiana tabacum-R. solani interaction. Also, we used the post-transcriptional silencing to evaluate the function of a group of important genes. RESULTS A total of 8960 and 8221 unique Tag sequences identified as differentially up- and down-regulated were obtained. Based on gene ontology classification, several annotated UniTags corresponded to defense response, metabolism and signal transduction. Analysis of the N. tabacum transcriptome during infection identified regulatory genes implicated in a number of hormone pathways. Silencing of an mRNA induced by salicylic acid reduced the susceptibility of N. tabacum to R. solani. We provide evidence that the salicylic acid pathway was involved in disease development. This is important for further development of disease management strategies caused by this pathogen.
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Affiliation(s)
- Roxana Portieles
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
| | | | - Eduardo Canales
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
| | - Yussuan Silva
- Tobacco Research Institute, Carretera de Tumbadero 8, 6063, San Antonio de los Baños, Havana, Cuba
| | - Osmani Chacón
- Tobacco Research Institute, Carretera de Tumbadero 8, 6063, San Antonio de los Baños, Havana, Cuba
| | - Ingrid Hernández
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
| | - Yunior López
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
| | - Mayra Rodríguez
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
| | - Ryohei Terauchi
- Iwate Biotechnology Research Center, Kitakami, Iwate 024-0003 Japan
| | - Carlos Borroto
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Colonia Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - Ramón Santos
- Universidad Técnica Luis Vargas Torres de Esmeraldas, Av. Kennedy 704, Esmeraldas, Ecuador
| | - Melvin D. Bolton
- USDA-Agricultural Research Service, Northern Crops Science Laboratory, 1605 Albrecht Blvd., Fargo, ND 58102-2765 USA
| | - Camilo Ayra-Pardo
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Nanyang Normal University, Henan, 473061 People’s Republic of China
| | - Orlando Borrás-Hidalgo
- Center for Genetic Engineering and Biotechnology, 10600 Havana, Cuba
- Shandong Provincial Key Laboratory of Microbial Engineering, School of Biotechnology, Qi Lu University of Technology, Jinan, 250353 People’s Republic of China
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11
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Ayra-Pardo C, Raymond B, Gulzar A, Rodríguez-Cabrera L, Morán-Bertot I, Crickmore N, Wright DJ. Novel genetic factors involved in resistance to Bacillus thuringiensis in Plutella xylostella. Insect Mol Biol 2015; 24:589-600. [PMID: 26335439 DOI: 10.1111/imb.12186] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The widespread and sustainable exploitation of the entomopathogen Bacillus thuringiensis (Bt) in pest control is threatened by the evolution of resistance. Although resistance is often associated with loss of binding of the Bt toxins to the insect midgut cells, other factors have been implicated. Here we used suppressive subtractive hybridization and gene expression suppression to identify additional molecular components involved in Bt-resistance in Plutella xylostella. We isolated transcripts from genes that were differentially expressed in the midgut of larvae from a resistant population, following ingestion of a Bt kurstaki HD1 strain-based commercial formulation (DiPel), and compared with a genetically similar susceptible population. Quantitative real-time polymerase-chain reaction (RT-PCR) analysis confirmed the differential basal expression of a subset of these genes. Gene expression suppression of three of these genes (P. xylostella cyclin-dependent kinase 5 regulatory subunit associated protein 1-like 1, stromal cell-derived factor 2-like 1 and hatching enzyme-like 1) significantly increased the pathogenicity of HD1 to the resistant population. In an attempt to link the multitude of factors reportedly influencing resistance to Bt with the well-characterized loss of toxin binding, we also considered Bt-resistance models in P. xylostella and other insects.
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Affiliation(s)
- C Ayra-Pardo
- Environmental Biotechnology Group, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - B Raymond
- Division of Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, UK
| | - A Gulzar
- Division of Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, UK
| | - L Rodríguez-Cabrera
- Environmental Biotechnology Group, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - I Morán-Bertot
- Environmental Biotechnology Group, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
| | - N Crickmore
- School of Life Sciences, University of Sussex, Brighton, UK
| | - D J Wright
- Division of Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire, UK
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12
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Téllez-Rodríguez P, Raymond B, Morán-Bertot I, Rodríguez-Cabrera L, Wright DJ, Borroto CG, Ayra-Pardo C. Strong oviposition preference for Bt over non-Bt maize in Spodoptera frugiperda and its implications for the evolution of resistance. BMC Biol 2014; 12:48. [PMID: 24935031 PMCID: PMC4094916 DOI: 10.1186/1741-7007-12-48] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 05/15/2014] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Transgenic crops expressing Bt toxins have substantial benefits for growers in terms of reduced synthetic insecticide inputs, area-wide pest management and yield. This valuable technology depends upon delaying the evolution of resistance. The 'high dose/refuge strategy', in which a refuge of non-Bt plants is planted in close proximity to the Bt crop, is the foundation of most existing resistance management. Most theoretical analyses of the high dose/refuge strategy assume random oviposition across refugia and Bt crops. RESULTS In this study we examined oviposition and survival of Spodoptera frugiperda across conventional and Bt maize and explored the impact of oviposition behavior on the evolution of resistance in simulation models. Over six growing seasons oviposition rates per plant were higher in Bt crops than in refugia. The Cry1F Bt maize variety retained largely undamaged leaves, and oviposition preference was correlated with the level of feeding damage in the refuge. In simulation models, damage-avoiding oviposition accelerated the evolution of resistance and either led to requirements for larger refugia or undermined resistance management altogether. Since larval densities affected oviposition preferences, pest population dynamics affected resistance evolution: larger refugia were weakly beneficial for resistance management if they increased pest population sizes and the concomitant degree of leaf damage. CONCLUSIONS Damaged host plants have reduced attractiveness to many insect pests, and crops expressing Bt toxins are generally less damaged than conventional counterparts. Resistance management strategies should take account of this behavior, as it has the potential to undermine the effectiveness of existing practice, especially in the tropics where many pests are polyvoltinous. Efforts to bring down total pest population sizes and/or increase the attractiveness of damaged conventional plants will have substantial benefits for slowing the evolution of resistance.
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Affiliation(s)
| | - Ben Raymond
- Division of Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Silwood Park campus, Ascot, Berkshire SL5 7PY, UK
| | - Ivis Morán-Bertot
- Centre for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba
| | | | - Denis J Wright
- Division of Biology, Department of Life Sciences, Faculty of Natural Sciences, Imperial College London, Silwood Park campus, Ascot, Berkshire SL5 7PY, UK
| | - Carlos G Borroto
- Centre for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba
| | - Camilo Ayra-Pardo
- Centre for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba
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13
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Hernandez D, Rodriguez- L, Valdes R, Moran I, Tellez P, Riveron A, Ramos Y, Gomez L, Ayra-Pardo C. Bacillus thuringiensis Vip3Aa1 Expression and Purification from E.
coli to be Determined in Seeds and Leaves of Genetically-Modified Corn Plants. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/ja.2013.153.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Rodríguez-Cabrera L, Trujillo-Bacallao D, Borrás-Hidalgo O, Wright DJ, Ayra-Pardo C. RNAi-mediated knockdown of a Spodoptera frugiperda trypsin-like serine-protease gene reduces susceptibility to a Bacillus thuringiensis Cry1Ca1 protoxin. Environ Microbiol 2010; 12:2894-903. [DOI: 10.1111/j.1462-2920.2010.02259.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Rodríguez-Cabrera L, Trujillo-Bacallao D, Borrás-Hidalgo O, Wright DJ, Ayra-Pardo C. Molecular characterization of Spodoptera frugiperda-Bacillus thuringiensis Cry1Ca toxin interaction. Toxicon 2007; 51:681-92. [PMID: 18222513 DOI: 10.1016/j.toxicon.2007.12.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2007] [Revised: 12/01/2007] [Accepted: 12/05/2007] [Indexed: 10/22/2022]
Abstract
The use of Bacillus thuringiensis Cry delta-endotoxins as bioinsecticides is threatened by the possibility of pest resistance. Determining transcriptional profiles of midgut cells early in Cry toxin poisoning is crucial for understanding the biochemical and molecular aspects of insect detoxification and for sustained use of such toxins. In this study, transcriptional responses of midgut cells from Spodoptera frugiperda third-instar larvae following treatment with Cry1Ca were investigated. Suppression subtractive hybridization (SSH) on insect midguts dissected at different time intervals during the first 24h of exposure to a sublethal concentration of Cry1Ca was used to isolate and identify S. frugiperda gut genes that change in expression on intoxication. After differential screening by membrane-based hybridization, 86 cDNA fragments were selected, sequenced, and analyzed in databases using BLASTN/BLASTX. The cDNA collection comprised a repertoire of genes mainly associated with metabolism, defence and oxidative stress. The expression of a subset of these genes was further investigated. Northern blot analysis confirmed the differential expression patterns between intoxicated and control larvae. The transcript accumulation rate at six different times taken after the initiation of the intoxication point was also examined. Differential expression of most genes examined was detected within 15 min after toxin challenge, where defence and oxidative stress-related genes were transcriptionally enhanced and metabolic-related genes were repressed.
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Affiliation(s)
- Lianet Rodríguez-Cabrera
- Department of Environmental Biotechnology, Centre for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba
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16
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Ayra-Pardo C, Davis P, Ellar DJ. The mutation R423S in the Bacillus thuringiensis hybrid toxin CryAAC slightly increases toxicity for Mamestra brassicae L. J Invertebr Pathol 2007; 95:41-7. [PMID: 17306294 DOI: 10.1016/j.jip.2006.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2006] [Revised: 12/10/2006] [Accepted: 12/21/2006] [Indexed: 11/16/2022]
Abstract
Bacillus thuringiensis Cry1Ac toxin is 100 times less toxic than Cry1C to Mamestra brassicae. An R(423)S mutation abolishes Cry1Ac toxin proteolysis in M. brassicae gut juice but does not increase its toxicity to this insect. The CryAAC hybrid toxin (1Ac/1Ac/1Ca) is toxic to M. brassicae but is susceptible to gut protease digestion at the R(423) residue. Accordingly we have investigated the effect of the R(423)S mutation in CryAAC on its toxicity for M. brassicae and Pieris brassicae. Bioassays demonstrated that the R(423)S mutation slightly increased the toxicity of CryAAC for M. brassicae by having a significantly inhibitory effect on the growth of surviving larvae. The mutant hybrid was still highly toxic to P. brassicae. Features of CryAACR(423)S such as, (1) stability in M. brassicae gut juice and (2) crystal solubility were investigated. Computer simulations suggest that a possible major increase in flexibility in the CryAAC loop beta7/beta8 (G(391)-P(397)) caused by the R(423)S substitution could be a reason for the increase in M. brassicae toxicity.
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Affiliation(s)
- Camilo Ayra-Pardo
- Environmental Biotechnology Laboratory, Centre for Genetic Engineering and Biotechnology (CIGB), Havana 10600, Cuba.
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17
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Ayra-Pardo C, Montejo-Sierra IL, Vázquez-Padrón RI, García-Martínez C. beta-D-glucuronidase gene from Escherichia coli is a functional reporter in the methylotrophic yeast Pichia pastoris. Lett Appl Microbiol 1999; 29:278-83. [PMID: 10664965 DOI: 10.1046/j.1365-2672.1999.00610.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The Escherichia coli gene gusA was expressed in the methylotrophic yeast Pichia pastoris in a transcriptional fusion to the homologous methanol-inducible AOX1 promoter. Four recombinant clones were selected for expression studies in shake flask conditions and beta-D-glucuronidase (beta-GUS) activity was assayed each 24 h during the induction period. Regardless of the genomic integration patterns and the gene dosage, beta-GUS was functionally expressed and easily detected in all studied clones. The results obtained demonstrate the feasibility of using this bacterial enzyme as a reporter in Pichia pastoris.
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Affiliation(s)
- C Ayra-Pardo
- Plant Division, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba.
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18
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de la Riva GA, Gonzalez-Cabrera J, Vazquez-Padron R, Ayra-Pardo C. Agrobacterium tumefaciens: a natural tool for plant transformation. ELECTRON J BIOTECHN 1998. [DOI: 10.2225/vol1-issue3-fulltext-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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19
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Vázquez-Padrón RI, Martínez-Gil AF, Ayra-Pardo C, González-Cabrera J, Prieto-Samsonov DL, de la Riva GA. Biochemical characterization of the third domain From Bacillus thuringiensisCRY1A Toxins. IUBMB Life 1998. [DOI: 10.1002/iub.7510450519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Vázquez-Padrón RI, Martínez-Gil AF, Ayra-Pardo C, González-Cabrera J, Prieto-Samsonov DL, de la Riva GA. Biochemical characterization of the third domain from Bacillus thuringiensis Cry1A toxins. Biochem Mol Biol Int 1998; 45:1011-20. [PMID: 9739466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Cry proteins from Bacillus thuringiensis have insecticidal properties. The function of domains I and II has been described but domain III has so far eluded understanding. Domain III from Cry1Ab and Cry1Ac has been cloned, expressed in E. coli and injected to rabbits with the aid of characterizing them immunologically. Interestingly, polyclonal antibodies against Cry1Ab fragment did not recognize either the native Cry1Ab toxin or the Cry1Ac fragment while those against the latter did recognize either the native Cry1Ac toxin or the Cry1Ab protein fragment. A combination of information from sequence comparison and hydrophobicity profile indicates that these protein fragments possibly adopt different spatial dispositions within the respective toxins.
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Affiliation(s)
- R I Vázquez-Padrón
- Department of Environment Biotechnology, Center for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
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21
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Prieto-Samsónov DL, Vázquez-Padrón RI, Ayra-Pardo C, González-Cabrera J, de la Riva GA. Bacillus thuringiensis: from biodiversity to biotechnology. J Ind Microbiol Biotechnol 1997; 19:202-19. [PMID: 9418060 DOI: 10.1038/sj.jim.2900460] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Bacillus thuringiensis is a Gram-positive bacterium, widely used in agriculture as a biological pesticide. The biocidal activity mainly resides in a parasporal protein inclusion body, or crystal. The inclusion is composed of one or more types of delta-endotoxins (Cry and Cyt proteins). Cry proteins are selectively toxic to different species from several invertebrate phyla: arthropods (mainly insects), nematodes, flatworms and protozoa. The mode of action of the insecticidal proteins is still a matter of investigation; generally, the active toxin is supposed to bind specific membrane receptors on the insect midgut brush-border epithelium, leading to intestinal cell lysis and subsequent insect death by starvation or septicemia. The toxin-encoding cry genes have been extensively studied and expressed in a large number of prokaryotic and eukaryotic organisms. The expression of such genes in transgenic plants has provided a powerful alternative for crop protection.
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Affiliation(s)
- D L Prieto-Samsónov
- Laboratory of Environmental Biotechnology, Centre for Genetic Engineering and Biotechnology (CIGB), Havana, Cuba
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