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Zhu H, Ahmad S, Duan Z, Shi J, Tang X, Dong Q, Xi C, Ge L, Wu T, Tan Y. The Jinggangmycin-induced Mthl2 gene regulates the development and stress resistance in Nilaparvata lugens Stål (Hemiptera: Delphacidae). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 196:105630. [PMID: 37945234 DOI: 10.1016/j.pestbp.2023.105630] [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: 08/01/2023] [Revised: 09/23/2023] [Accepted: 09/25/2023] [Indexed: 11/12/2023]
Abstract
Methuselah (Mth) belongs to the GPCR family B, which regulates various biological processes and stress responses. The previous transcriptome data showed jinggangmycin (JGM)-induced Mthl2 expression. However, its detailed functional role remained unclear in brown planthopper, Nilaparvata lugens Stål. In adult N. lugens, the Mthl2 gene showed dominant expressions, notably in ovaries and fat body tissues. The 3rd instar nymphs treated with JGM increased starvation, oxidative stress, and high temperature (34 °C) tolerance of the adults. On the contrary, under dsMthl2 treatment, completely opposite phenotypes were observed. The lipid synthesis genes (DGAT1and PNPLA3) of both females and males treated with JGM in the nymphal stage were observed with high expressions, while the lipolysis of the Lipase 3 gene was observed with low expressions. The JGM increased triglyceride (TG) content, fat body droplet size, and the number of fat body droplets. The same treatment also increased the Glutathione S-transferase (GST), catalase (CAT), and superoxide dismutase (SOD) activities. An increase in the heat shock protein (HSP70 and HSP90) expression levels was also observed under JGM treatment but not dsMthl2. The current study demonstrated the influential role of the Mthl genes, particularly the Mthl2 gene, in modulating the growth and development and stress-responsiveness in N. lugens. Thus, providing a platform for future applied research programs controlling N. lugens population in rice fields.
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Affiliation(s)
- Haowen Zhu
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Sheraz Ahmad
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Zhirou Duan
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Junting Shi
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Xingyu Tang
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Qiaoqiao Dong
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Chuanyuan Xi
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China
| | - Linquan Ge
- College of Plant Protection, Yangzhou University, 225009 Yangzhou, PR China.
| | - Tao Wu
- College of Horticulture and Landscape Architecture, Yangzhou University, 225009 Yangzhou, PR China.
| | - Yongan Tan
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China.
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Gao S, Xue S, Gao T, Lu R, Zhang X, Zhang Y, Zhang K, Li R. Transcriptome analysis reveals the role of Zelda in the regulation of embryonic and wing development of Tribolium castaneum. BULLETIN OF ENTOMOLOGICAL RESEARCH 2023; 113:587-597. [PMID: 37476851 DOI: 10.1017/s0007485323000263] [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: 07/22/2023]
Abstract
Zinc finger protein (Zelda) of Tribolium castaneum (TcZelda) has been showed to play pivotal roles in embryonic development and metamorphosis. However, the regulatory mechanism of TcZelda associated with these physiology processes is unclear. Herein, the developmental expression profile showed that Zelda of T. castaneum was highly expressed in early eggs. Tissue expression profiling revealed that TcZelda was mainly expressed in the larval head and adult ovary of late adults and late larvae. TcZelda knockdown led to a 95% mortality rate in adults. These results suggested that TcZelda is related to the activation of the zygote genome in early embryonic development. Furthermore, 592 differentially expressed genes were identified from the dsZelda treated group. Compared with the control group, altered disjunction (ALD) and AGAP005368-PA (GAP) in the dsZelda group were significantly down-regulated, while TGF-beta, propeptide (TGF) was significantly up-regulated, suggesting that TcZelda may be involved in insect embryonic development. In addition, the expression of Ubx ultrabithorax (UBX), Cx cephalothorax (CX), En engrailed (EN), and two Endocuticle structural glycoprotein sgabd (ABD) genes were significantly down-regulated, suggesting that they may cooperate with TcZelda to regulate the development of insect wings. Additionally, Elongation (ELO), fatty acid synthase (FAS), and fatty acyl-CoA desaturase (FAD) expression was inhibited in dsZelda insects, which could disturb the lipase signaling pathways, thus, disrupting the insect reproductive system and pheromone synthesis. These results may help reveal the function of TcZelda in insects and the role of certain genes in the gene regulatory network and provide new ideas for the prevention and control of T. castaneum.
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Affiliation(s)
- Shanshan Gao
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Shuang Xue
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Tian Gao
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Ruixue Lu
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Xinyi Zhang
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Yonglei Zhang
- College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu 210023, China
| | - Kunpeng Zhang
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
| | - Ruimin Li
- Department of Food and Bioengineering, Anyang Institute of Technology, Anyang, Henan 455000, China
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Dong W, Wu WJ, Song CY, Li T, Zhang JZ. Jinggangmycin stimulates reproduction and increases CHCs-dependent desiccation tolerance in Drosophila melanogaster. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 194:105484. [PMID: 37532348 DOI: 10.1016/j.pestbp.2023.105484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 05/18/2023] [Accepted: 05/27/2023] [Indexed: 08/04/2023]
Abstract
Jinggangmycin (JGM), an agricultural antibiotic compound, is mainly used against the rice sheath blight (RSB) Rhizoctonia solani. However, its application may lead to unexpected consequences in insects. In this study, the effects of JGM on the physiological parameters of Drosophila melanogaster were investigated. The results showed that 0.005 g/ml JGM exposure increased female daily egg production and extended the oviposition period, while there was no significant effect on reproduction at 0.016 g/ml. At the same time, desiccation tolerance increased in flies fed 0.005 g/ml JGM. The RT-qPCR results revealed that FAS1 and FAS3 expression were upregulated in 0.005 g/ml JGM treated flies. Consistently, the amount of CHCs accumulated on the cuticle surface increased upon JGM treatment at 0.005 g/ml. Moreover, RNAi for FAS3 decreased desiccation tolerance of JGM-treated flies. These results suggest that JGM affects fatty acid biosynthesis, which in turn enhances reproduction and desiccation tolerance in Drosophila.
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Affiliation(s)
- Wei Dong
- Institute of Applied Biology, Shanxi Key Laboratory of Nucleic Acid Biopesticides, Shanxi University, Taiyuan, China.
| | - Wen-Jun Wu
- Institute of Applied Biology, Shanxi Key Laboratory of Nucleic Acid Biopesticides, Shanxi University, Taiyuan, China; College of Life Science, Shanxi University, Taiyuan, China
| | - Chen-Yang Song
- Institute of Applied Biology, Shanxi Key Laboratory of Nucleic Acid Biopesticides, Shanxi University, Taiyuan, China; College of Life Science, Shanxi University, Taiyuan, China
| | - Ting Li
- Institute of Applied Biology, Shanxi Key Laboratory of Nucleic Acid Biopesticides, Shanxi University, Taiyuan, China; College of Life Science, Shanxi University, Taiyuan, China
| | - Jian-Zhen Zhang
- Institute of Applied Biology, Shanxi Key Laboratory of Nucleic Acid Biopesticides, Shanxi University, Taiyuan, China
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Cheng JY, Yu PH, Xia X, Zhang R, Wang LH, Fang JC, Hoffmann AA, Luo GH. Identification of a fatty acid synthase gene (FAS1) from Laodelphax striatellus planthoppers contributing to fecundity. INSECT SCIENCE 2023; 30:599-610. [PMID: 36308064 DOI: 10.1111/1744-7917.13125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 06/15/2023]
Abstract
Fatty acid synthase (FAS) is a multifunctional enzyme that plays an important role in the formation of fatty acids. The fatty acids take part in many processes, such as cell signaling and energy metabolism, and in insects they are important in both cuticular hydrocarbon (CHC) formation and reproduction. Here we characterized the sequence structure and function of an FAS from the small brown planthopper (SBPH), Laodelphax striatellus. The full-length open reading frame (ORF) sequence of LsFAS1 was 7122 bp, encoding a predicted protein of 2373 amino acid residues. There were 7 functional domains in the LsFAS1 protein sequence. Gene expression screening by real-time quantitative polymerase chain reaction (RT-qPCR) showed that LsFAS1 was expressed in all developmental stages. Relative expression was highest at the 4th-instar and female adult stages. Among different tissues, the expression level of LsFAS1 in the ovary was the highest. Phylogenetic analysis showed that LsFAS1 clustered in a clade with 2 FASs from Nilaparvata lugens. Furthermore, these 3 FASs are related to cockroach BgFAS and locust LmFAS. After RNA interference-mediated knock-down, most treated insects died at eclosion. In addition, the lifespan of dsFAS1-treated female adults was shorter than that of the dsGFP-injected control, and offspring production decreased. Also, the expression of vitellogenin (Vg) and vitellogenin receptor (VgR) genes decreased. Virgin females dissected at days 2 and 4 post-eclosion showed many matured oocytes in planthoppers treated with dsGFP but not with dsFAS1. These data highlight the importance of LsFAS1 in SBPH, including a role in reproduction.
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Affiliation(s)
- Jia-Yan Cheng
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Pei-Han Yu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Xue Xia
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Ru Zhang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Li-Hua Wang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Ji-Chao Fang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
| | - Ary A Hoffmann
- School of BioSciences, Bio21 Institute, University of Melbourne, Parkville, Victoria, Australia
| | - Guang-Hua Luo
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Jiangsu Key Laboratory for Food and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Nanjing, China
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Reproductive Outbreaks of Sogatella furcifera Mediated by Overexpression of the Nuclear Receptor USP under Pressure from Triflumezopyrim. Int J Mol Sci 2022; 23:ijms232213769. [PMID: 36430247 PMCID: PMC9698614 DOI: 10.3390/ijms232213769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/25/2022] [Accepted: 11/03/2022] [Indexed: 11/12/2022] Open
Abstract
Long-term pesticide-driven selection pressure is one of the main causes of insect outbreaks. In this study, we found that low doses of triflumezopyrim could increase the fecundity of white-backed planthoppers (Sogatella furcifera). By continuously screening 20 generations with a low dose of triflumezopyrim, a triflumezopyrim-resistant strain (Tri-strain, resistance ratio = 20.9-fold) was obtained. The average oviposition quantity and longevity of the Tri-strain (208.77 eggs and 21.31 days, respectively) were significantly higher than those of the susceptible strain (Sus-strain) (164.62 eggs and 17.85 days, respectively). To better understand the mechanism underlying the effects on reproduction, we detected the expression levels of several reproduction-related transcription factors in both the Tri- and Sus-strains. Ultraspiracle (USP) was significantly overexpressed in the Tri-strain. Knockdown of USP by RNAi severely inhibited the moulting process of S. furcifera and disrupted the development of female adult ovaries. Among the potential downstream target genes of USP, Kr-h1 (0.19-fold), Cht8 (0.56-fold) and GPCR A22 (0.31-fold) showed downregulated expression after USP-RNAi. In contrast, the expression of EcR (2.55-fold), which forms heterodimers with USP, was significantly upregulated. Furthermore, RNAi was performed on Kr-h1 in the Tri-strain, and the results show that larval moulting and the development of female adult ovaries were inhibited, consistent with the USP-RNAi results in S. furcifera. These results suggest that the transcription factors USP and Kr-h1 play important roles in the reproductive development of S. furcifera, and overexpression of USP and Kr-h1 in the Tri-resistant strain may result in reproductive outbreaks of pests.
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Shan C, Li B, Li L, Li B, Ren Y, Liu T. Correlation between Irradiation Treatment and Metabolite Changes in Bactrocera dorsalis (Diptera: Tephritidae) Larvae Using Solid-Phase Microextraction (SPME) Coupled with Gas Chromatography-Mass Spectrometry (GC-MS). Molecules 2022; 27:4641. [PMID: 35889514 PMCID: PMC9320597 DOI: 10.3390/molecules27144641] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/12/2022] [Accepted: 07/17/2022] [Indexed: 02/04/2023] Open
Abstract
The metabolites produced by the larvae of Bactrocera dorsalis (Diptera: Tephritidae) exposed to different doses of irradiation were analyzed using solid phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS), and a metabonomic analysis method of irradiated insects based on GC-MS was established. The analysis revealed 67 peaks, of which 23 peaks were identified. The metabolites produced by larvae treated with different irradiation doses were compared by multivariate statistical analysis, and eight differential metabolites were selected. Irradiation seriously influenced the fatty acid metabolic pathway in larvae. Using the R platform combined with the method of multivariate statistical analysis, changes to metabolite production under four irradiation doses given to B. dorsalis larvae were described. Differential metabolites of B. dorsalis larvae carried chemical signatures that indicated irradiation dose, and this method is expected to provide a reference for the detection of irradiated insects.
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Affiliation(s)
- Changyao Shan
- Institute of Equipment Technology, Chinese Academy of Inspection and Quarantine, No. A3, Gaobeidianbeilu, Chaoyang District, Beijing 100123, China; (C.S.); (B.L.); (L.L.)
- College of Science, Health, Engineering and Education, Murdoch University, Perth 6150, Australia;
| | - Baishu Li
- Institute of Equipment Technology, Chinese Academy of Inspection and Quarantine, No. A3, Gaobeidianbeilu, Chaoyang District, Beijing 100123, China; (C.S.); (B.L.); (L.L.)
| | - Li Li
- Institute of Equipment Technology, Chinese Academy of Inspection and Quarantine, No. A3, Gaobeidianbeilu, Chaoyang District, Beijing 100123, China; (C.S.); (B.L.); (L.L.)
| | - Beibei Li
- College of Science, Health, Engineering and Education, Murdoch University, Perth 6150, Australia;
| | - YongLin Ren
- College of Science, Health, Engineering and Education, Murdoch University, Perth 6150, Australia;
| | - Tao Liu
- Institute of Equipment Technology, Chinese Academy of Inspection and Quarantine, No. A3, Gaobeidianbeilu, Chaoyang District, Beijing 100123, China; (C.S.); (B.L.); (L.L.)
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7
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Yu HZ, Zhang Q, Lu ZJ, Deng MJ. Validamycin treatment significantly inhibits the glycometabolism and chitin synthesis in the common cutworm, Spodoptera litura. INSECT SCIENCE 2022; 29:840-854. [PMID: 34414659 DOI: 10.1111/1744-7917.12963] [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: 05/21/2021] [Revised: 07/01/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
Validamycin, as a broadly applied antibiotic, has been used to control rice sheath blight disease. Furthermore, validamycin was considered as an insecticide to control agricultural pests. Insight into the mechanism of validamycin's action on insects can provide molecular targets for the control of agricultural pests. In this study, a toxicological test analysis revealed that Spodoptera litura larval growth and development was significantly inhibited and the pupation rate was significantly reduced with the increase of the concentration of validamycin. According to the NMR-based metabolomic analysis, a total of 15 metabolites involved in glycolysis and tricarboxylic acid cycle (TCA) pathways were identified. Additionally, trehalase activities, glucose and chitin contents were significantly downregulated, but the trehalose content was upregulated after exposure to validamycin. Reverse transcription quantitative PCR analysis revealed that the expression level of genes involved in glycolysis, TCA and chitin synthesis were upregulated after treating with validamycin. Further chitin staining also confirmed that chitin content was downregulated at 12 h after validamycin treatment. Our results indicated that validamycin worked via two different molecular mechanisms, one through inhibiting glycometabolism and the other by inhibiting chitin synthesis in S. litura. The information lays a theoretical foundation for further control of S. litura.
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Affiliation(s)
- Hai-Zhong Yu
- College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi Province, China
- National Navel Orange Engineering Research Center, Ganzhou, Jiangxi Province, China
| | - Qin Zhang
- College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi Province, China
| | - Zhan-Jun Lu
- College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi Province, China
- National Navel Orange Engineering Research Center, Ganzhou, Jiangxi Province, China
| | - Ming-Jie Deng
- Analytical and Testing Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang Province, China
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Wu Y, Lian Y, Peng S, Wang A, Yang H, Li J, Yang S, Zhou S. Comparative Genomic-Based Study of Reproduction-Related Genes in Three Fruit Fly Species. Front Genet 2022; 13:893695. [PMID: 35692817 PMCID: PMC9185124 DOI: 10.3389/fgene.2022.893695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 03/25/2022] [Indexed: 11/24/2022] Open
Abstract
Zeugodacus cucurbitae (Coquillett), Bactrocera dorsalis (Hendel), and Ceratitis capitata (Wiedemann) are important pests of fruit and vegetable crops and are difficult to control because of their rapid reproduction rate and egg production. To investigate the key genes regulating reproduction in three fruit fly species, we selected genomic information of three fruit fly species, screened specific genes and single-copy homolog genes, and performed KEGG and GO enrichment analysis on specific genes and single-copy homolog genes of the strong positive select (SP); the results showed that Z. cucurbitae (Coquillett), B. dorsalis (Hendel), and C. capitata (Wiedemann) had seven, 11, and one Vitellogenin-related genes, respectively; Z. cucurbitae (Coquillett) had 84 specific genes enriched in immune system-related pathways; B. dorsalis (Hendel) had 1,121 specific genes enriched in signaling pathways related to cell growth and differentiation; C. capitata (Wiedemann) had 42 specific genes enriched in the degradation and metabolism pathways of exogenous organisms; Z. cucurbitae (Coquillett) may have a stronger immune system; B. dorsalis (Hendel) has a faster developmental and reproductive rate; and C. capitata (Wiedemann) has a higher detoxification capacity. Only one SP single-copy homolog gene (gene name: very long-chain specific acyl-CoA dehydrogenase, mitochondrial) is enriched in the fatty acid metabolic pathway in both Z. cucurbitae (Coquillett) and B. dorsalis (Hendel) as well as in Z. cucurbitae (Coquillett) and C. capitata (Wiedemann). This study provides a molecular basis for studying the reproductive mechanisms of three fruit fly species and provides a scientific basis for developing effective control strategies for fruit flies.
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Affiliation(s)
- Yinggu Wu
- College of Plant Protection, Hainan University, Haikou, China
| | - Yuyang Lian
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Sihua Peng
- College of Plant Protection, Hainan University, Haikou, China
| | - Aqiang Wang
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Heming Yang
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Jinlei Li
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Shuyan Yang
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Shihao Zhou
- Sanya Nanfan Research Institute of Hainan University, Sanya, China
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Yu H, Yi L, Lu Z. Silencing of Chitin-Binding Protein with PYPV-Rich Domain Impairs Cuticle and Wing Development in the Asian Citrus Psyllid, Diaphorina citri. INSECTS 2022; 13:insects13040353. [PMID: 35447795 PMCID: PMC9027310 DOI: 10.3390/insects13040353] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/25/2022] [Accepted: 03/27/2022] [Indexed: 12/25/2022]
Abstract
Simple Summary Molting is extremely important for insect growth and development, which is accompanied the degradation of old cuticle and synthesis of new cuticle. Chitin and proteins, as major components of insect cuticle, maintain the rigidity of the exoskeleton. The functions of chitin-binding proteins have not, to date, been characterized in Diaphorina citri. In the current study, we identified a cuticle protein (DcCP64) according to chitin column purification and LC-MS/MS analysis. Silencing of DcCP64 induced an abnormal phenotype and increased the permeability of the abdomen and wings. Additionally, the mortality and malformation rate significantly increased, and the molting rate decreased after inhibition of DcCP64. Transcriptome sequencing analysis revealed that up-regulated DEGs were mainly related to oxidative phosphorylation, whereas down-regulated DEGs were mainly involved in MAPK and FoxO signaling pathways. Our results provide a basis for further functional research on DcCP64 in D. citri. Abstract Chitin is a major component of the arthropod exoskeleton, always working together with chitin-binding proteins to maintain the functions of extracellular structures. In the present study, we identified a cuticle protein 64 from Diaphorina citri using a chitin-binding assay. Bioinformatics analysis revealed that DcCP64 contained eight conserved PYPV motifs but lacked a Rebers–Riddiford (R–R) consensus and other chitin-binding domains. RT-qPCR analysis suggested that DcCP64 had the highest expression level in the wing and fifth-instar nymph stage. Knockdown of DcCP64 by RNA interference (RNAi) resulted in a malformed-wing phenotype, higher mortality and decreased molting rate. Furthermore, transcriptomics analysis revealed that 1244 differentially expressed genes (DEGs) were up-regulated and 580 DEGs were down-regulated, compared with dsDcCP64 groups and dsGFP groups. KEGG enrichment analysis revealed that up-regulated DEGs were mainly related to oxidative phosphorylation, whereas down-regulated DEGs were mainly involved in the MAPK and FoxO signaling pathways. Moreover, inhibition of DcCP64 significantly affected the cuticle surface, and increased the permeability of the abdomen and wings. Further chitin- and cellulose-binding assay confirmed the chitin-binding properties of recombinant DcCP64 in vitro. These results indicate that DcCP64 might play an important role in the cuticle and wing development of D. citri.
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Affiliation(s)
- Haizhong Yu
- College of Life Sciences, Gannan Normal University, Ganzhou 341000, China;
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou 341000, China
- Ganzhou Key Laboratory of Nanling Insect Biology, Gannan Normal University, Ganzhou 341000, China
| | - Long Yi
- College of Life Sciences, Gannan Normal University, Ganzhou 341000, China;
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou 341000, China
- Correspondence: (L.Y.); (Z.L.); Tel.: +86-0797-8397738 (L.Y. & Z.L.)
| | - Zhanjun Lu
- College of Life Sciences, Gannan Normal University, Ganzhou 341000, China;
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou 341000, China
- Ganzhou Key Laboratory of Nanling Insect Biology, Gannan Normal University, Ganzhou 341000, China
- Correspondence: (L.Y.); (Z.L.); Tel.: +86-0797-8397738 (L.Y. & Z.L.)
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10
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Gong C, Wang Y, Huang Q, Xu Z, Zhang Y, Hasnain A, Zhan X, He Y, Zhang T, Shen L, Pu J, Awais M, Wang X. Maf regulates the overexpression of CYP307A1, which is involved in the fitness advantage of bistrifluron-resistant Spodoptera litura (Fab.) (Noctuidae: Lepidoptera). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 234:113425. [PMID: 35325711 DOI: 10.1016/j.ecoenv.2022.113425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/10/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Spodoptera litura is a widely distributed multifeeding pest, that has developed high resistance to many chemical insecticides. In the present study, a bistrifluron-resistant (Bis-SEL) strain showing 113.8-fold resistance ratio relative to a bistrifluron-susceptible (Bis-UNSEL) strain was obtained and showed a fitness advantage (resurgence). First, we found that the observed resurgence might have resulted from Maf transcription factor overexpression in the Bis-SEL strain, which would influence the synthesis of ecdysone and chitin. Additionally, a co-expression relationship between Maf and CYP307A1 was verified by weighted correlation network analysis (WGCNA) and qRT-PCR, and the expression of CYP307A1, a key gene in ecdysone synthesis, was significantly downregulated by Maf interference. The assay for transposase-accessible chromatin with high-throughput sequencing (ATAC-seq) and a yeast one-hybrid showed that Maf could bind to the cncc:maf-s element in the CYP307A1 promoter region. The synthesis of ecdysone, which stimulated chitin synthesis, was also decreased significantly following Maf and CYP307A1 interference. Therefore, the upregulation of Maf expression leaded to the upregulation CYP307A1 expression, which led to an increase in the synthesis of ecdysone, resulting in resurgence accompanied by resistance to bistrifluron.
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Affiliation(s)
- Changwei Gong
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yumeng Wang
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Qian Huang
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhengze Xu
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuming Zhang
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Ali Hasnain
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoxu Zhan
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Yunfeng He
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Tianyi Zhang
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Litao Shen
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Jian Pu
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Muhammad Awais
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China
| | - Xuegui Wang
- College of Agriculture, Sichuan Agricultural University, Chengdu 611130, China.
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Gong C, Wang X, Huang Q, Zhang J, Zhang Y, Zhan X, Zhang S, Hasnain A, Ruan Y, Shen L. The fitness advantages of bistrifluron resistance related to chitin synthase A in Spodoptera litura (Fab.) (Noctuidae: Lepidoptera). PEST MANAGEMENT SCIENCE 2021; 77:3458-3468. [PMID: 33822459 DOI: 10.1002/ps.6399] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/20/2021] [Accepted: 04/06/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Spodoptera litura is one of the major agricultural pests in China, and it has developed serious resistance to many traditional chemical insecticides. In the present study, the bistrifluron-resistant (Bis-SEL) strain accompanied by a higher oviposition, 113.8-fold RR compared to the bistrifluron-susceptible (Bis-UNSEL) strain, was obtained by bidirectional screening. A comparison of their gonad coefficiency and genes related to oviposition or resistance was used to elucidate the resurgence mechanism. RESULTS The ovarian index, oviposition, and potential egg production in the Bis-SEL strain of female adults were significantly higher than those in the Bis-UNSEL strain, and the length of ovariole in the Bis-SEL strain was also significantly elongated. The protein contents of vitellogenin (Vg) and vitellogenin receptor (VgR) in the Bis-UNSEL strain were lower than those in the Bis-SEL strain, consistent with their gene expressions levels, and there was a significantly positive linear correlation between Vg and VgR protein contents, further confirming that resistant strains have high reproductive fitness. Moreover, the chitin synthase A in the Bis-SEL strain was clearly up-regulated, and a mutation (H866Y) near the QRRRW in the catalytic domain caused a rise in the hydrogen bond between UDP-GlcNAc and chitin synthase, and its chitin content was higher than that in the Bis-UNSEL strain. Nevertheless, the sensitivity of the Bis-SEL strain to bistrifluron was significantly recovered when it was knocked down though RNA interference. CONCLUSION The fitness advantages of bistrifluron resistance may be related to the up-regulation and mution of chitin synthase A. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Changwei Gong
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Xuegui Wang
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Qian Huang
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Jinyue Zhang
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Yuming Zhang
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Xiaoxu Zhan
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Shuirong Zhang
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Ali Hasnain
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Yanwei Ruan
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
| | - Litao Shen
- Biorational Pesticide Research Lab, College of Agriculture, Sichuan Agricultural University, Chengdu, China
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12
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Hou Z, Shi F, Ge S, Tao J, Ren L, Wu H, Zong S. Comparative transcriptome analysis of the newly discovered insect vector of the pine wood nematode in China, revealing putative genes related to host plant adaptation. BMC Genomics 2021; 22:189. [PMID: 33726671 PMCID: PMC7968331 DOI: 10.1186/s12864-021-07498-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 03/02/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND In many insect species, the larvae/nymphs are unable to disperse far from the oviposition site selected by adults. The Sakhalin pine sawyer Monochamus saltuarius (Gebler) is the newly discovered insect vector of the pine wood nematode (Bursaphelenchus xylophilus) in China. Adult M. saltuarius prefers to oviposit on the host plant Pinus koraiensis, rather than P. tabuliformis. However, the genetic basis of adaptation of the larvae of M. saltuarius with weaken dispersal ability to host environments selected by the adult is not well understood. RESULTS In this study, the free amino and fatty acid composition and content of the host plants of M. saltuarius larvae, i.e., P. koraiensis and P. tabuliformis were investigated. Compared with P. koraiensis, P. tabuliformis had a substantially higher content of various free amino acids, while the opposite trend was detected for fatty acid content. The transcriptional profiles of larval populations feeding on P. koraiensis and P. tabuliformis were compared using PacBio Sequel II sequencing combined with Illumina sequencing. The results showed that genes relating to digestion, fatty acid synthesis, detoxification, oxidation-reduction, and stress response, as well as nutrients and energy sensing ability, were differentially expressed, possibly reflecting adaptive changes of M. saltuarius in response to different host diets. Additionally, genes coding for cuticle structure were differentially expressed, indicating that cuticle may be a potential target for plant defense. Differential regulation of genes related to the antibacterial and immune response were also observed, suggesting that larvae of M. saltuarius may have evolved adaptations to cope with bacterial challenges in their host environments. CONCLUSIONS The present study provides comprehensive transcriptome resource of M. saltuarius relating to host plant adaptation. Results from this study help to illustrate the fundamental relationship between transcriptional plasticity and adaptation mechanisms of insect herbivores to host plants.
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Affiliation(s)
- Zehai Hou
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China
| | - Fengming Shi
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China
| | - Sixun Ge
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China
| | - Jing Tao
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China
| | - Lili Ren
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China
| | - Hao Wu
- Liaoning Provincial Key Laboratory of Dangerous Forest Pest Management and Control, Shenyang, China
| | - Shixiang Zong
- Key Laboratory of Beijing for the Control of Forest Pests, Beijing Forestry University, Beijing, China.
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13
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Yang Y, Zhao X, Niu N, Zhao Y, Liu W, Moussian B, Zhang J. Two fatty acid synthase genes from the integument contribute to cuticular hydrocarbon biosynthesis and cuticle permeability in Locusta migratoria. INSECT MOLECULAR BIOLOGY 2020; 29:555-568. [PMID: 32741000 DOI: 10.1111/imb.12665] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 07/02/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Lipids of the insect cuticle have important roles in resistance against the arid environment and invasion of foreign substances. Fatty acid synthase (FAS) is an important enzyme of the insect lipid synthesis pathway. In the present study, we identified three FAS genes from transcriptome data of the migratory locust, Locusta migratoria, based on bioinformatics analyses. Among them, two FAS genes (LmFAS1 and LmFAS3) are highly expressed in the integument of fifth instar nymphs. Suppression of LmFAS1 and LmFAS3 by RNA interference caused lethality during ecdysis or shortly after moulting. The weight of the locusts and the content of lipid droplets were reduced compared with those of the control. The results of gas chromatography-mass spectrometry analysis showed that knockdown of LmFAS3 led to a decrease of both cuticular hydrocarbons and inner hydrocarbons (CHCs and IHCs) contents, especially the content of methyl branched hydrocarbons. By contrast, knockdown of LmFAS1 only resulted in a decrease in the IHC content, but not that of CHCs. By consequence, in LmFAS1- and LmFAS3-suppressed locusts, hydrocarbon deficiency reduced desiccation resistance and enhanced cuticle permeability and sensitivity to insecticides. These results indicate that LmFAS1 and LmFAS3 are essential for hydrocarbon production and cuticle permeability, which play influential roles in waterproofing the insect cuticle.
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Affiliation(s)
- Y Yang
- Institute of Applied Biology, Shanxi University, Taiyuan, China
- College of Life Science, Shanxi University, Taiyuan, China
| | - X Zhao
- Institute of Applied Biology, Shanxi University, Taiyuan, China
| | - N Niu
- Institute of Applied Biology, Shanxi University, Taiyuan, China
- College of Life Science, Shanxi University, Taiyuan, China
| | - Y Zhao
- Institute of Applied Biology, Shanxi University, Taiyuan, China
- College of Life Science, Shanxi University, Taiyuan, China
| | - W Liu
- Institute of Applied Biology, Shanxi University, Taiyuan, China
| | - B Moussian
- Université Côte d'Azur, CNRS, INSERM, Institute of Biology Valrose, Nice, France
| | - J Zhang
- Institute of Applied Biology, Shanxi University, Taiyuan, China
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14
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Zha W, You A. Comparative iTRAQ proteomic profiling of proteins associated with the adaptation of brown planthopper to moderately resistant vs. susceptible rice varieties. PLoS One 2020; 15:e0238549. [PMID: 32903256 PMCID: PMC7480849 DOI: 10.1371/journal.pone.0238549] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/18/2020] [Indexed: 02/06/2023] Open
Abstract
The brown planthopper (BPH), Nilaparvata lugens (Stål), is a destructive pest that poses a significant threat to rice plants worldwide. To explore how BPHs adapt to the resistant rice variety, we analyzed proteomics profiles of two virulent N. lugens populations. We focused on Biotype Y, which can survive on the moderately resistant rice variety YHY15, and Biotype I, which can survive on the susceptible rice variety TN1. We performed protein quantitation using the isobaric tag for relative and absolute quantification (iTRAQ) and then compared the expression patterns between two virulent N. lugens populations and found 258 differentially expressed proteins (DEPs). We found that 151 of the DEPs were up-regulated, while 107 were down-regulated. We evaluated transcript levels of 8 expressed genes from the iTRAQ results by qRT-PCR, which revealed transcriptional changes that were consistent with the changes at the protein level. The determination of the protein changes in two virulent N. lugens populations would help to better understanding BPH adaptation to resistant rice varieties and facilitate the better design of new control strategies for host defense against BPH.
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Affiliation(s)
- Wenjun Zha
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Aiqing You
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
- Hubei Collaborative Innovation Center for Grain Industry, Yangtze University, Jingzhou, China
- * E-mail:
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15
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About lipid metabolism in Hermetia illucens (L. 1758): on the origin of fatty acids in prepupae. Sci Rep 2020; 10:11916. [PMID: 32680992 PMCID: PMC7368053 DOI: 10.1038/s41598-020-68784-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/02/2020] [Indexed: 01/09/2023] Open
Abstract
Although increasingly targeted in animal nutrition, black soldier fly larvae or prepupae (BSF, Hermetia illucens L. 1758) require the characterization and modulation of their fatty acid profile to become fully integrated within the feed sector. This improvement will only be possible by the understanding of underlaying biochemical pathways of fatty acid synthesis in BSF. In this study, we hypothesized a labelling of de novo synthesized fatty acids in BSF by the incorporation of deuterated water (D2O) in their feed. Three batches of fifty larvae were reared on two diets with different polyunsaturated fatty acid profiles moistened with 40% of H2O or D2O: chicken feed or 40% of chicken feed and 60% of flax cake. Although the occurrence of D2O in insect feed increased the larval development time and decreased prepupal weight, it was possible to track the biosynthesis of fatty acids through deuterium labelling. Some fatty acids (decanoic, lauric or myristic acid) were exclusively present in their deuterated form while others (palmitic, palmitoleic or oleic acid) were found in two forms (deuterated or not) indicating that BSF can partially produce these fatty acids via biosynthesis pathways and not only by bioaccumulation from the diet. These results suggest the importance of carbohydrates as a source of acetyl-CoA in the constitution of the BSF fatty acid profile but also the potential importance of specific enzymes (e.g. thioesterase II or Δ12 fat2 desaturase) in BSF fatty acid metabolism. Finally, nearly no deuterated polyunsaturated fatty acids were found in BSF fed with deuterium confirming that BSF is not able to produce these types of fatty acids. Despite the high levels of linolenic acid in flax-enriched diets, BSF will simply bioaccumulate around 13% of this fatty acid and will metabolize approximately two-thirds of it into saturated fatty acids as lauric or myristic acid.
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16
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Su H, Yang Y, Zou J, Cheng Y, Yang Y, Wu J, Pollak P, Yang Y. Transcriptome analysis of the ovary of beet armyworm Spodoptera exigua under different exposures of cadmium stress. CHEMOSPHERE 2020; 251:126372. [PMID: 32169707 DOI: 10.1016/j.chemosphere.2020.126372] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 02/26/2020] [Accepted: 02/27/2020] [Indexed: 06/10/2023]
Abstract
Heavy metal pollution is becoming an increasingly serious problem globally, and cadmium pollution ranks first in the world. Reproduction in insects is affected by cadmium stress in a dose-dependent manner. However, no previous studies have examined the molecular mechanisms underlying the influence of cadmium exposure on insect reproduction. In this study, RNA-Seq was used to investigate changes in ovary gene expression in newly emerged female beet army worms. The beet armyworms were reared under 4 cadmium concentrations: 0 mg/kg (control), low 0.2 mg/kg (L), medium 12.8 mg/kg (M) and high 51.2 mg/kg (H). Compared with the control (CK), a total of 3453 differentially expressed genes (DEGs) were identified in L cadmium stress, including 1791 up-regulated and 1662 down-regulated candidates; in L versus M groups, 982 up-regulated and 658 down-regulated DEGs; and in M versus H groups, 6508 up-regulated and 2000 down-regulated DEGs were identified and the expression patterns of ten genes were verified by q PCR. Many of the identified DEGs were relevant to juvenile hormone and molting hormone biosynthesis, insulin secretion, estrogen signaling, amino acid metabolism and lipid biosynthesis. These data will provide a molecular prospective to understand the ecological risk of heavy metal pollution and are a resource for selecting key genes as targets in gene-editing/silencing technologies for sustainable pest management.
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Affiliation(s)
- Honghua Su
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China.
| | - Yang Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China
| | - Jincheng Zou
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China
| | - Yuqing Cheng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China
| | - Yong Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China
| | - Jiaojiao Wu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China
| | - Patrick Pollak
- Entomology Department, Cornell University, Ithaca, NY, 14853, USA
| | - Yizhong Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, 225009, PR China.
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17
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Ge L, Zhou Z, Sun K, Huang B, Stanley D, Song QS. The antibiotic jinggangmycin increases brown planthopper (BPH) fecundity by enhancing rice plant sugar concentrations and BPH insulin-like signaling. CHEMOSPHERE 2020; 249:126463. [PMID: 32213388 DOI: 10.1016/j.chemosphere.2020.126463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
The brown planthopper (BPH), Nilaparvata lugens, is a resurgent pest with an unexpected response to jinggangmycin (JGM), a broadly applied antibiotic used to control rice sheath blight disease. JGM stimulates BPH fecundity, but the underlining molecular mechanisms remain unclear. Here we report that JGM sprays led to increased glucose concentrations, photosynthesis and gene expression, specifically Rubsico, sucrose phosphate synthase, invertase 2 (INV2) and INV3 in rice plants. JGM sprays led to high-glucose rice plants. Feeding BPH on these plants led to increased insulin-like signaling and vitellogenin synthesis. Treating BPH with metformin, a gluconeogenesis inhibitor, reversed the influence of feeding on high-glucose rice, which was rescued by glucose injections. Silencing insulin-like peptide 2 using per os dsRNA led to reduction in juvenile hormone (JH) III titers and other fecundity parameters, which were reversed by topical applications of the JH analog, methoprene. We infer that JGM acts via two broad mechanisms, one through increasing rice plant sugar concentrations and a second by upregulating BPH insulin-like signaling.
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Affiliation(s)
- LinQuan Ge
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu Province, China.
| | - Ze Zhou
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - KaiDi Sun
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - Bo Huang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu Province, China
| | - David Stanley
- USDA/Agricultural Research Service, Biological Control of Insects Research Laboratory, Columbia, MO, USA
| | - Qi Sheng Song
- Division of Plant Sciences, University of Missouri, 1-31 Agriculture Building, Columbia, MO, 65211, USA.
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18
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Wu J, Ge L, Liu F, Song Q, Stanley D. Pesticide-Induced Planthopper Population Resurgence in Rice Cropping Systems. ANNUAL REVIEW OF ENTOMOLOGY 2020; 65:409-429. [PMID: 31610135 DOI: 10.1146/annurev-ento-011019-025215] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Planthoppers are serious rice pests in Asia. Their population resurgence was first reported in the early 1960s, caused mainly by insecticides that indiscriminately killed beneficial arthropods and target pests. The subsequent resurgence involved two mechanisms, the loss of beneficial insects and insecticide-enhanced planthopper reproduction. In this review, we identify two forms of resurgence, acute and chronic. Acute resurgence is caused by traditional insecticides with rapid resurgence in the F1 generation. Chronic resurgence follows application of modern pesticides, including fungicides and herbicides, with low natural enemy toxicity, coupled with stimulated planthopper reproduction. The chemical-driven syndrome of changes leads to later resurgence in the F2 or later generations. Chronic resurgence poses new threats to global rice production. We review findings on the physiological and molecular mechanisms of chronic planthopper resurgence and suggest research directions that may help manage these new threats.
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Affiliation(s)
- Jincai Wu
- School of Plant Protection, Yangzhou University, Yangzhou, Jiangsu 225009, China;
| | - Linquan Ge
- School of Plant Protection, Yangzhou University, Yangzhou, Jiangsu 225009, China;
| | - Fang Liu
- School of Plant Protection, Yangzhou University, Yangzhou, Jiangsu 225009, China;
| | - Qisheng Song
- Division of Plant Sciences, University of Missouri, Columbia, Missouri 65211, USA
| | - David Stanley
- Biological Control of Insects Research Laboratory, US Department of Agriculture, Agricultural Research Service, Columbia, Missouri 65203, USA
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19
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Pei XJ, Chen N, Bai Y, Qiao JW, Li S, Fan YL, Liu TX. BgFas1: A fatty acid synthase gene required for both hydrocarbon and cuticular fatty acid biosynthesis in the German cockroach, Blattella germanica (L.). INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 112:103203. [PMID: 31425851 DOI: 10.1016/j.ibmb.2019.103203] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/29/2019] [Accepted: 08/03/2019] [Indexed: 06/10/2023]
Abstract
Insect cuticular hydrocarbons (CHCs), the evolutionary products of aquatic hexapod ancestors expanding to terrestrial environment, are deposited on the surface of insect integument and originally functioned primarily as waterproofing agents. CHCs are derived from the conserved fatty acid synthesis pathway in insects. However, the pivotal fatty acid synthase (FAS) involved in hydrocarbon (HC) biosynthesis remains unknown in many insect orders including the primitive Blattodea. Here, we investigated functional FAS genes that modulate cuticular lipid biogenesis in the German cockroach, Blattella germanica (L.). Based on our full-length transcriptomic data and the available genomic data, seven FAS genes (BgFas1-7) were identified from B. germanica. Tissue-specific expression analysis revealed that BgFas1, BgFas3, BgFas4 and BgFas7 were highly expressed in the integument, whereas BgFas2 was dominantly expressed in the fat body. BgFas5/6 mRNA was almost negligible in the tested tissues. Systemic RNAi screen was performed against BgFas1-7, we found that only RNAi knockdown of BgFas1 caused a dramatic reduction of methyl-branched HCs (mbHCs) and a slight decrease of straight-chain HCs (scHCs) for both internal and external HCs. Significant reduction of cuticular free fatty acids (cFFAs) was also detected within BgFas1-repressed cockroaches, while repression of CYP4G19 resulted in dramatic increase of cFFAs. Moreover, we found that BgFas1 mRNA levels were correlated with insect molting cycles, and could be induced by long-term mild dryness treatment. Furthermore, desiccation assay revealed that BgFas1 suppression accelerated water loss and led to early death of cockroaches under desiccation. Our results indicate that BgFas1 is necessary for both HC and cFFA biosynthesis in B. germanica. In addition, our study also confirms that cuticular lipids, particularly mbCHCs, are critical for desiccation resistance in B. germanica.
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Affiliation(s)
- Xiao-Jin Pei
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Nan Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China.
| | - Yu Bai
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China.
| | - Jian-Wen Qiao
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Sheng Li
- Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology and Institute of Insect Science and Technology, School of Life Sciences, South China Normal University, Guangzhou, 510631, China.
| | - Yong-Liang Fan
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China; State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Tong-Xian Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas and Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
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20
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Sun R, Sun Z, Chen Y, Zhu F, Li Y, Zhong G, Yi X. Comparative proteomic analysis of sex-biased proteins in ovary and testis at different stages of Spodoptera litura. J Proteomics 2019; 206:103439. [PMID: 31271900 DOI: 10.1016/j.jprot.2019.103439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/20/2019] [Accepted: 06/30/2019] [Indexed: 10/26/2022]
Abstract
Sex-biased protein is thought to be able to drive the phenotypic differences in males and females in insects. In this study, 1385 and 1727 proteins were identified as differentially accumulated proteins (DAPs) by comparing the protein abundances at pupae stage with those at adult stage in ovary and testis of S.litura, respectively. And among which, 548 DAPs were showed to be expressed in both ovary and testis, and 837 and 1179 proteins were considered as ovary-specific and testis-specific DAPs, respectively. To further identify DAPs related to gonad development and sex dimorphism, a total of 320 DAPs were selected and defined as "proteins of specific interest" based on several selecting criteria. Sex dimorphism is a complex and dynamic developmental progress, and these identified DAPs were suggested to be involved in multiple functions such as organonitrogen compound catabolic process, glycosylation, proteasome, N-Glycan biosynthesis and other reproduction-related processes. Overall, our results highlighted these sexual-biased, gonad development related and sexual dimorphism related DAPs, and their abundance variations along with development were also examined, which could provide important information for their functional analysis in reproduction and potential biomarkers for developing useful strategies against S. litura and other orthologous pests. BIOLOGICAL SIGNIFICANCE: Sex dimorphism entails the differentiation of two sexual functions, resulting in sexually phenotypic differences and leading to the development of female and male morphologies and behaviors. However, sex dimorphism related proteins remain to be identified in many non-model insects. In this study, iTRAQ-based proteomic analysis was applied to examine the variations of protein abundances at pupae stage and adult stage in ovary and testis of S.litura, respectively. Reproduction and sex dimorphism related proteins were further identified as "proteins of specific interest". These identified candidate proteins provided valuable information for their further functional analysis in reproduction and could serve as potential biomarkers for developing useful strategies against S. litura and other orthologous pests.
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Affiliation(s)
- Ranran Sun
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Zhipeng Sun
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Yaoyao Chen
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Fuyu Zhu
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Yun Li
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Guohua Zhong
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China.
| | - Xin Yi
- Key Laboratory of Crop Integrated Pest Management in South China, Ministry of Agriculture, South China Agricultural University, Guangzhou, China; Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China.
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21
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Ge LQ, Zheng S, Gu HT, Zhou YK, Zhou Z, Song QS, Stanley D. Jinggangmycin-Induced UDP-Glycosyltransferase 1-2-Like Is a Positive Modulator of Fecundity and Population Growth in Nilaparvata lugens (Stål) (Hemiptera: Delphacidae). Front Physiol 2019; 10:747. [PMID: 31293435 PMCID: PMC6598453 DOI: 10.3389/fphys.2019.00747] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 05/31/2019] [Indexed: 12/13/2022] Open
Abstract
The antibiotic jinggangmycin (JGM) is broadly applied in Chinese rice producing regions to control rice blight, a fungal disease. Aside from protecting rice plants from the disease, JGM leads to the unexpected action of stimulating brown planthopper (BPH; Nilaparvata lugens; Hemiptera: Delphacidae) reproduction to the extent it can influence population sizes. The JGM-induced BPH population growth has potential for severe agricultural problems and we are working to understand and mitigate the mechanisms of the enhanced reproduction. UDP-glucuronosyltransferases (UGTs) are multifunctional detoxification enzymes responsible for biotransformation of diverse lipophilic compounds. The biological significance of this enzyme family in insect fecundity is not fully understood, however, upregulated UGT12 in JGM-treated BPH, may influence fecundity through metabolism of developmental hormones. This idea prompted our hypothesis that NlUGT12 is a positive modulator of BPH reproductive biology. JGM treatment led to significant increases in accumulations of mRNA encoding NlUGT12, numbers of eggs laid, oviposition period, juvenile hormone III titers, and fat body, and ovarian protein contents. dsUGT12 treatment suppressed NlUGT12 expression and reversed JGM-enhanced effects, resulting in under-developed ovaries and reduced expression of juvenile hormone acid methyltransferase and the JH receptor, methoprene tolerant. Application of the JH analog, methoprene, on dsUGT12 treated-females partially reversed the dsUTG12 influence on vitellogenin synthesis and on NlUGT12 expression. These results represent an important support for our hypothesis.
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Affiliation(s)
- Lin Quan Ge
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Sui Zheng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Hao Tian Gu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Yong Kai Zhou
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Ze Zhou
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, China
| | - Qi Sheng Song
- Division of Plant Sciences, University of Missouri, Columbia, MO, United States
| | - David Stanley
- Biological Control of Insects Research Laboratory, United States Department of Agriculture - Agricultural Research Service, Columbia, MO, United States
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22
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The Desaturase Gene Family is Crucially Required for Fatty Acid Metabolism and Survival of the Brown Planthopper, Nilaparvata lugens. Int J Mol Sci 2019; 20:ijms20061369. [PMID: 30893760 PMCID: PMC6472150 DOI: 10.3390/ijms20061369] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 12/16/2022] Open
Abstract
Desaturases are essentially required for unsaturated fatty acid (UFA) biosynthesis. We identified 10 genes encoding putative desaturases in the transcriptome database of the brown planthopper (BPH), Nilaparvata lugens. These include eight First Desaturase family genes, one cytochrome b5 fused desaturase gene (Nlug-Cytb5r) and one Sphingolipid Desaturase gene (Nlug-ifc). Transcript level profiling revealed significant variation in the expression patterns of these genes across tissues and developmental stages, which occur in a gene-specific manner. Interestingly, their expression was also modulated by the insect food source: the mRNA levels of Nlug-desatC and Nlug-Cytb5r were down-regulated, but the expression level of Nlug-desatA1-b and Nlug-desatA1-c were elevated in the BPH fed on the resistant rice variety Babawee as compared to the non-resistant variety Taichun Native 1 (TN1). Silencing Nlug-desatA1-b, Nlug-desatA1-c, or Nlug-Ifc reduced fatty acid composition and abundance in female BPH 1-d-old-adults compared to controls. Whereas, single knockdown of all ten desaturase genes significantly increased mortality of BPH nymphs compared with controls. Of the ten desaturase genes, knockdown of Nlug-desatA1-b and Nlug-desatA2 caused the highest mortality in BPH (91% and 97%, respectively). Our findings offer a base for expression and functional characterization of newly identified desaturase genes in BPH, and may contribute to RNA interference-based pest management strategies.
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23
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Liu PC, Tian S, Hao DJ. Sexual Transcription Differences in Brachymeria lasus (Hymenoptera: Chalcididae), a Pupal Parasitoid Species of Lymantria dispar (Lepidoptera: Lymantriidae). Front Genet 2019; 10:172. [PMID: 30891067 PMCID: PMC6411638 DOI: 10.3389/fgene.2019.00172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 02/18/2019] [Indexed: 12/11/2022] Open
Abstract
Sex differences in gene expression have been extensively documented, but little is known about these differences in parasitoid species that are widely applied to control pests. Brachymeria lasus is a solitary parasitoid species and has been evaluated as a potential candidate for release to control Lymantria dispar. In this study, gender differences in B. lasus were investigated using Illumina-based transcriptomic analysis. The resulting 37,453 unigene annotations provided a large amount of useful data for molecular studies of B. lasus. A total of 1416 differentially expressed genes were identified between females and males, and the majority of the sex-biased genes were female biased. Gene Ontology (GO) and Pathway enrichment analyses showed that (1) the functional categories DNA replication, fatty acid biosynthesis, and metabolism were enhanced in females and that (2) the only pathway enriched in males was phototransduction, while the GO subcategories enriched in males were those involved in membrane and ion transport. In addition, thirteen genes involving transient receptor potential (TRP) channels were annotated in B. lasus. We further explored and discussed the functions of TRPs in sensory signaling of light and temperature. In general, this study provides new molecular insights into the biological and sexually dimorphic traits of parasitoids, which may improve the application of these insects to the biological control of pests.
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Affiliation(s)
- Peng-Cheng Liu
- Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- The College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Shuo Tian
- Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- The College of Forestry, Nanjing Forestry University, Nanjing, China
| | - De-Jun Hao
- Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China
- The College of Forestry, Nanjing Forestry University, Nanjing, China
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24
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Liu PC, Hao DJ. Behavioural and transcriptional changes in post-mating females of an egg parasitoid wasp species. ROYAL SOCIETY OPEN SCIENCE 2019; 6:181453. [PMID: 30800387 PMCID: PMC6366167 DOI: 10.1098/rsos.181453] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 12/12/2018] [Indexed: 06/09/2023]
Abstract
In many animals, mating is essential for the production of offspring by females; however, mating seems to not be necessary in Hymenoptera insects. Virgin females can produce offspring, although the sex of the offspring is all male. Usually, behavioural and physiological changes are induced by mating in female insects, including parasitoid wasps. However, very little is known about the resulting changes in gene expression that contribute to the post-mating response in females; thus, we studied this aspect in the egg parasitoid wasp species Anastatus disparis (Hymenoptera: Eupelmidae) by transcriptional analysis. A total of 55 differentially expressed genes were identified in post-mating females, and most of the genes (90.9%) were downregulated. Upregulated genes encoded products that were mainly involved in fatty acid synthesis and pyrimidine metabolism, while the downregulated genes were mainly involved in substance transport and metabolism. In addition, post-mating A. disparis females exhibited a tendency to accelerate egg maturation and became unreceptive to further mating. Based on the transcriptional data, we discuss how specific genes mediate these behavioural and physiological changes. Overall, our study provided new and comprehensive insights into post-mating changes in females and provided a basis for future mechanistic studies.
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Affiliation(s)
- Peng-Cheng Liu
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing City, Jiangsu Province, People's Republic of China
- College of Forestry, Nanjing Forestry University, Nanjing City, Jiangsu Province, People's Republic of China
| | - De-Jun Hao
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing City, Jiangsu Province, People's Republic of China
- College of Forestry, Nanjing Forestry University, Nanjing City, Jiangsu Province, People's Republic of China
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25
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Sun R, Cui G, Chen Y, Shu B, Zhong G, Yi X. Proteomic Profiling Analysis of Male Infertility in Spodoptera Litura
Larvae Challenged with Azadirachtin and its Potential-Regulated Pathways in the Following Stages. Proteomics 2018; 18:e1800192. [DOI: 10.1002/pmic.201800192] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/28/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Ranran Sun
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
| | - Gaofeng Cui
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
| | - Yaoyao Chen
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
| | - Benshui Shu
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
| | - Guohua Zhong
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
| | - Xin Yi
- Key Laboratory of Natural Pesticide and Chemical Biology; Ministry of Education; South China Agricultural University; Guangzhou P. R. China
- Key Laboratory of Crop Integrated Pest Management in South China; Ministry of Agriculture; South China Agricultural University; Guangzhou P. R. China
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26
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Zhang X, Ding J, Xu B, Ge LQ, Yang GQ, Wu JC. Long chain fatty acid coenzyme A ligase (FACL) regulates triazophos-induced stimulation of reproduction in the small brown planthopper (SBPH), Laodelphax striatellus (Fallen). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 148:81-86. [PMID: 29891382 DOI: 10.1016/j.pestbp.2018.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
The small brown planthopper (SBPH), Laodelphax striatellus (Fallen) is a major pest insect of rice, wheat, and maize in China and other countries. SBPH not only damage rice plants through sucking plant sap, but also transmits rice virus diseases, for example, striped virus disease (RSV), black streaked dwarf, and maize rough disease virus. Therefore, understanding of pesticide-induced stimulation of reproduction in SBPH is of great significance for the pest management. Our previous study discovered that triazophos (TZP) increased reproduction of SBPH. But the molecular mechanisms are unclear. Here, by using proteomic analysis, we screened and cloned the gene of long chain fatty acid coenzyme A ligase (FACL), and silenced FACL to examine influences of TZP on reproduction and glycerin content in SBPH females. In TZP-treated females vs control females, there were 41 differential proteins in 18 pathways related to reproduction, of which 8 were up-regulated and 33 were down-regulated. TZP + dsFACL eliminated TZP-induced stimulation of reproduction of SBPH females (↓about 73.92%) and decreased glycerin content and body weight (↓about 19.93% and 13.62%). TZP + dsFACL treatment led to reduced expression of FACL (↓about 61.88%). FACL is a key gene of TZP-induced increase of reproduction of SBPH.
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Affiliation(s)
- Xian Zhang
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Jun Ding
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Bing Xu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Lin-Quan Ge
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Guo-Qing Yang
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Jin-Cai Wu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
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27
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Wu Y, Ding J, Xu B, You L, Ge L, Yang G, Liu F, Stanley D, Song Q, Wu J. Two Fungicides Alter Reproduction of the Small Brown Planthopper Laodelphax striatellus by Influencing Gene and Protein Expression. J Proteome Res 2018; 17:978-986. [PMID: 29411984 DOI: 10.1021/acs.jproteome.7b00612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Aside from their intended actions, fungicides can drive pest insect outbreaks due to virtually continuous use and pest evolution. Small brown planthopper (SBPH), Laodelphax striatellus, outbreaks occurred recently in many provinces in China, with devastating rice losses. Because exposure to the fungicide jinggangmycin (JGM) increased reproduction of the brown plant hopper, Nilaparvata lugens, via its influence on fatty acid synthase, we posed the hypothesis that JGM and carbendazim (CBM) influence SBPH reproduction via their influence on enzymes involved in other aspects of lipid metabolism. Exposure to the fungicide CBM stimulated SBPH reproduction (egg-laying up by 78%) and to another fungicide, JGM, led to decreased egg-laying (down by 47.3%). These inverse effects are mediated by down-regulated expression of l-3-hydroxyacyl-coenzyme A dehydrogenase (LCHAD) in JGM-treated females and up-regulated expression of hydroxysteroid dehydrogenase-like protein 2-like (HSD) in CBM-treated females. RNAi knockdown of, separately, LCHAD and HSD led to reduced egg-laying (down by 52% for dsLCHAD and by 73% for dsHSD). dsLCHAD, dsHSD, and JGM treatments also led to severely reduced ovarian development in experimental SBPH, with shorted and thinned valvula and lack of egg cells in ovaries. Valvula of CBM-treated females enlarged, with banana-shaped eggs in ovaries. These data strongly support our hypothesis.
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Affiliation(s)
- You Wu
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Jun Ding
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Bing Xu
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Linlin You
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Linquan Ge
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Guoqing Yang
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - Fang Liu
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
| | - David Stanley
- Biological Control of Insects Research Laboratory, USDA/Agricultural Research Service , 1503 South Providence Road, Columbia, Missouri 65203, United States
| | - Qisheng Song
- Division of Plant Sciences, University of Missouri , 1-31 Agriculture Building, Columbia, Missouri 65211, United States
| | - Jincai Wu
- School of Plant Protection, Yangzhou University , Yangzhou 225009, P. R. China
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28
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Ge LQ, Huang B, Li X, Gu HT, Zheng S, Zhou Z, Miao H, Wu JC. Silencing pyruvate kinase (NlPYK) leads to reduced fecundity in brown planthoppers, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2017; 96:e21429. [PMID: 29114912 DOI: 10.1002/arch.21429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pyruvate kinase (PYK) operates in the glycolytic pathway, responsible for regulating the balance between glycolysis and gluconeogenesis. The previous work indicates PYK acts in development of Drosophila embryos and in embryonic muscle growth, from which it may be inferred that PYK acts in insect fecundity. More to the point, as a central enzyme in the glycolytic pathway, PYK acts in many energy-spending functions in most organisms. On the background findings that triazophos (TZP) stimulates fecundity via increase activities of several genes in brown planthoppers, Nilaparvata lugens, we investigated the combined influence of TZP and silencing a N. lugens PYK (NlPYK) on reproduction-linked biological performance parameters. Here, we report that TZP+dsNlPYK treatments led to reduced (by 26%) ovarian, but not fat body, protein content relative to controls. Ovarian (35%) and fat body (54%) soluble sugar contents were reduced. TZP+dsNlPYK treatments also led to reduced (by about 24%) fecundity, expressed as numbers of eggs laid. These data show directly that NlPYK acts in insect fecundity, probably via increases in glucose metabolism.
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Affiliation(s)
- Lin-Quan Ge
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Bo Huang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Xin Li
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Hao-Tian Gu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Sui Zheng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Ze Zhou
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
| | - Hong Miao
- College of Mechanical Engineering, Yangzhou University, Yangzhou, P. R. China
| | - Jin-Cai Wu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, P. R. China
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29
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Ge LQ, Huang B, Jiang YP, Gu HT, Xia T, Yang GQ, Liu F, Wu JC. Carboxylesterase Precursor (EST-1) Mediated the Fungicide Jinggangmycin-Suppressed Reproduction of Sogatella furcifera (Hemiptera: Delphacidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:2199-2206. [PMID: 28981692 DOI: 10.1093/jee/tox201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Indexed: 06/07/2023]
Abstract
The jinggangmycin (JGM) is a widely used fungicide for controlling the rice sheath blight, Rhizoctonia solani, in China. Previous experiments under lab conditions showed that JGM foliar spray suppressed Sogatella furcifera (Horvath) reproduction. However, the molecular mechanisms of JGM-driven changes in S. furcifera reproduction are unclear. Therefore, we selected carboxylesterase precursor (EST-1) as a target gene for silencing by RNAi based on gene expression profiles. The present results demonstrated that JGM and control + dsSfEST-1 treatments significantly reduced the number of eggs laid (down by 58% and 54%, respectively), oviposition period (down by 57% and 38%, respectively), and longevity (down by 32% and 38%, respectively) in adult females compared with untreated controls, while no pronounced differences in the preoviposition period were observed. Meanwhile, the dietary control + dsSfEST-1 treatment also severely impeded protein synthesis, specifically soluble ovarian protein content (down by 20% and 24%, respectively) and soluble sugar content (down by 42% and 35%, respectively), which led to stunted growth and reduced body weight in adult females. We thereby speculate that downregulated SfEST-1 expression may be one molecular mechanism underlying JGM-driven reproduction in S. furcifera.
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Affiliation(s)
- Lin-Quan Ge
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
- Joint Laboratory Safety of International Cooperation of Agriculture & Agricultural -Products, Yangzhou University, Yangzhou 225009, P.R. China
| | - Bo Huang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Yi-Ping Jiang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Hao-Tian Gu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Ting Xia
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Guo-Qing Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Fang Liu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
| | - Jin-Cai Wu
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P.R. China
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30
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Ding J, Wu Y, You LL, Xu B, Ge LQ, Yang GQ, Wu JC. Jinggangmycin-suppressed reproduction in the small brown planthopper (SBPH), Laodelphax striatellus (Fallen), is mediated by glucose dehydrogenase (GDH). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 139:73-78. [PMID: 28595925 DOI: 10.1016/j.pestbp.2017.05.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/27/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
The small brown planthopper (SBPH), Laodelphax striatellus (Fallen), is a serious pest insect of rice, wheat, and maize in China. SBPH not only sucks plant sap but also transmits plant disease viruses, causing serious damage. These viruses include rice striped virus disease (RSV disease), black streaked dwarf, and maize rough disease virus. SBPH outbreaks are related to the overuse of pesticides in China. Some pesticides, such as triazophos, stimulate the reproduction of SBPH, but an antibiotic fungicide jinggangmycin (JGM) suppresses its reproduction. However, mechanisms of decreased reproduction of SBPH induced by JGM remain unclear. The present findings show that JGM suppressed reproduction of SBPH (↓approximately 35.7%) and resulted in the down-regulated expression of glucose dehydrogenase (GDH). GDH-silenced control females (control+dsGDH) show that the number of eggs laid was reduced by 48.6% compared to control females. Biochemical tests show that the total lipid and fatty acid contents in JGM-treated and control+dsGDH females decreased significantly. Thus, we propose that the suppression of reproduction in SBPH induced by JGM is mediated by GDH via metabolic pathways.
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Affiliation(s)
- Jun Ding
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - You Wu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Lin-Lin You
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Bin Xu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Lin-Quan Ge
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Guo-Qing Yang
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Jin-Cai Wu
- School of Plant Protection, Yangzhou University, Yangzhou 225009, China.
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31
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Proteomic profile of the Bradysia odoriphaga in response to the microbial secondary metabolite benzothiazole. Sci Rep 2016; 6:37730. [PMID: 27883048 PMCID: PMC5121901 DOI: 10.1038/srep37730] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/31/2016] [Indexed: 01/15/2023] Open
Abstract
Benzothiazole, a microbial secondary metabolite, has been demonstrated to possess fumigant activity against Sclerotinia sclerotiorum, Ditylenchus destructor and Bradysia odoriphaga. However, to facilitate the development of novel microbial pesticides, the mode of action of benzothiazole needs to be elucidated. Here, we employed iTRAQ-based quantitative proteomics analysis to investigate the effects of benzothiazole on the proteomic expression of B. odoriphaga. In response to benzothiazole, 92 of 863 identified proteins in B. odoriphaga exhibited altered levels of expression, among which 14 proteins were related to the action mechanism of benzothiazole, 11 proteins were involved in stress responses, and 67 proteins were associated with the adaptation of B. odoriphaga to benzothiazole. Further bioinformatics analysis indicated that the reduction in energy metabolism, inhibition of the detoxification process and interference with DNA and RNA synthesis were potentially associated with the mode of action of benzothiazole. The myosin heavy chain, succinyl-CoA synthetase and Ca+-transporting ATPase proteins may be related to the stress response. Increased expression of proteins involved in carbohydrate metabolism, energy production and conversion pathways was responsible for the adaptive response of B. odoriphaga. The results of this study provide novel insight into the molecular mechanisms of benzothiazole at a large-scale translation level and will facilitate the elucidation of the mechanism of action of benzothiazole.
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32
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Driving Pest Insect Populations: Agricultural Chemicals Lead to an Adaptive Syndrome in Nilaparvata Lugens Stål (Hemiptera: Delphacidae). Sci Rep 2016; 6:37430. [PMID: 27876748 PMCID: PMC5120279 DOI: 10.1038/srep37430] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 10/20/2016] [Indexed: 11/08/2022] Open
Abstract
The brown planthopper (BPH) is a devastating pest of rice throughout Asia. In this paper we document the BPH biogeographic range expansion in China over the 20-year period, 1992 to 2012. We posed the hypothesis that the range expansion is due to a syndrome of adaptations to the continuous presence of agricultural chemicals (insecticides and a fungicide) over the last 40 years. With respect to biogeography, BPH ranges have expanded by 13% from 1992 to 1997 and by another 3% from 1997 to 2012. In our view, such expansions may follow primarily from the enhancing effects of JGM, among other agricultural chemicals, and from global warming. JGM treatments led to increased thermotolerance, recorded as decreased mortality under heat stress at 40 ± 1 °C (down from 80% to 55%) and increased fecundity (by 49%) at 34 °C. At the molecular level, JGM treatments led to increased abundances of mRNA encoding Acetyl Co-A carboxylase (Acc) (up 25%) and Hsp70 (up 32%) in experimental BPH. RNAi silencing of Hsp70 and Acc eliminated the JGM effects on fecundity and silencing Hsp70 reduced JGM-induced thermotolerance. Integrated with global climate change scenarios, such syndromes in pest insect species have potential for regional- and global-scale agricultural disasters.
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Xu B, You LL, Wu Y, Ding J, Ge LQ, Wu JC. Transmission Electron Microscopy (TEM) Observations of Female Oocytes From Nilaparvata lugens (Hemiptera: Delphacidae): Antibiotic Jinggangmycin (JGM)-Induced Stimulation of Reproduction and Associated Changes in Hormone Levels. JOURNAL OF ECONOMIC ENTOMOLOGY 2016; 109:1677-82. [PMID: 27247297 PMCID: PMC4981076 DOI: 10.1093/jee/tow085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 03/28/2016] [Indexed: 05/20/2023]
Abstract
Previous studies have demonstrated that the agricultural antibiotic jinggangmycin (JGM) stimulates reproduction in the brown planthopper Nilaparvata lugens Stål and that the stimulation of brown planthopper reproduction induced by JGM is regulated by the fatty acid synthase (FAS) and acetyl-CoA carboxylase (ACC) genes. However, a key issue in the stimulation of reproduction induced by pesticides involves the growth and development of oocytes. Therefore, the present study investigated oocyte changes via transmission electron microscopy (TEM) and changes in hormone levels (juvenile hormones (JH) and 20-hydroxyecdysone (20 E)) in JGM-treated females. TEM observations showed that the size of the lipid droplets in the oocytes of JGM-treated females, compared with those in the oocytes of the control females, significantly reduced by 32.6 and 29.8% at 1 and 2 d after emergence (1 and 2 DAE), respectively. In addition, the JH levels of JGM-treated females at 1 and 2 DAE were increased by 49.7 and 45.7%, respectively, whereas 20 E levels decreased by 36.0 and 30.0%, respectively. We conclude that JGM treatments lead to substantial changes in lipid metabolism, which are directly and indirectly related to stimulation of reproduction of brown planthopper together with our previous findings.
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Affiliation(s)
- Bing Xu
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
| | - Lin-Lin You
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
| | - You Wu
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
| | - Jun Ding
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
| | - Lin-Quan Ge
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
| | - Jin-Cai Wu
- School of Plant Protection, Yangzhou University, Yangzhou 220059, P.R. China (; ; ; ; ; )
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Suppressing male spermatogenesis-associated protein 5-like gene expression reduces vitellogenin gene expression and fecundity in Nilaparvata lugens Stål. Sci Rep 2016; 6:28111. [PMID: 27305948 PMCID: PMC4910105 DOI: 10.1038/srep28111] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 05/31/2016] [Indexed: 01/22/2023] Open
Abstract
In our previous study with the brown planthopper (BPH), Nilaparvata lugens, triazophos (tzp) treatments led to substantial up-regulation of a male spermatogenesis-associated protein 5-like gene (NlSPATA5) compared to untreated controls. Mating with tzp-treated males significantly increased fecundity (as numbers of eggs laid), relative to females mated with untreated males. Because SPATA5 acts in mammalian sperm development and is expressed in testes, we posed the hypothesis that NlSPATA5 occurs in BPH seminal fluid and it operates in fecundity via mating. We tested the hypothesis by investigating the influence of suppressing NlSPATA5 expression in BPH males on fecundity. Reduced expression of NlSPATA5 led to decreased male accessory gland protein content and reproductive system development compared to controls. These changes in males led to prolonged pre-oviposition periods and decreased fecundity in females. For both genders, we recorded no difference in the body weight, oviposition periods, and longevity compared to controls. NlSPATA5 suppression in males also led to decreased fat body and ovarian protein content, yeast-like symbionts abundance and ovarian development as well as vitellogenin gene expression in their mating partners. We infer that increased NlSPATA5 expression may be one molecular mechanism of tzp-driven reproduction and population increases in BPH.
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