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Fan Y, Dong X, Yang D, Qin Y, Hu X, Zhou H. New mutations of acetylcholinesterase in Bactrocera dorsalis populations across southern China and impact on resistance to organophosphate. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2025; 297:118189. [PMID: 40280043 DOI: 10.1016/j.ecoenv.2025.118189] [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: 01/20/2025] [Revised: 04/04/2025] [Accepted: 04/11/2025] [Indexed: 04/29/2025]
Abstract
Bactrocera dorsalis, a highly destructive and invasive fruit pest, has spread from the south to the north, significantly increasing the risk to agricultural and horticultural crops worldwide. Currently, chemical insecticides remain the primary method of controlling B. dorsalis. Chlorpyrifos, an organophosphate insecticide, has become the main alternative in China following the 2008 ban on five highly toxic organophosphates. However, the current status of resistance and its underlying mechanisms remain largely unclear. The study monitored the resistance levels of five field populations in China, revealing moderate resistance to chlorpyrifos (resistance ratios 7.57-17.06-fold). Six mutations (I214V, G420A, G488S, Q643R, H645L and T659A) in the target acetylcholinesterase 2 (AChE2) of chlorpyrifos were firstly identified, with high heterogeneity among field populations. This significant association were found between the G420A mutation frequency and chlorpyrifos resistance, evidence in both the individual survival rates and the population resistance levels. In vitro expression of ten AChE2 variation showed G420A conferred greater reduced sensitivity to chlopyrifos than other mutations, while H645L and T659A combined with Q643R increased sensitivity. Most variants retained substantial substrate hydrolysis activity. We compared twelve mutations in AChE2 reported in insects and discussed their implications. These provides critical insights into B. dorsalis control strategies and the development of more effective insecticides targeting AChE2 in insects.
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Affiliation(s)
- Yinjun Fan
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University; Shandong Province Centre for Bio-invasions and Eco-security; China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
| | - Xinyi Dong
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University; Shandong Province Centre for Bio-invasions and Eco-security; China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
| | - Dan Yang
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University; Shandong Province Centre for Bio-invasions and Eco-security; China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
| | - Yu Qin
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University; Shandong Province Centre for Bio-invasions and Eco-security; China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
| | - Xueping Hu
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, PR China.
| | - Hongxu Zhou
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University; Shandong Province Centre for Bio-invasions and Eco-security; China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
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Li Z, Wang X, Ren M, Li Z, Xi Y, Su L, Song Q, Zhang G, An S, Yin X. Sublethal and lethal effects of avermectin on reproductive success, hormonal regulation, and population dynamics of the oriental fruit fly, Bactrocera dorsalis. PEST MANAGEMENT SCIENCE 2025. [PMID: 40353325 DOI: 10.1002/ps.8899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2025] [Revised: 04/20/2025] [Accepted: 04/28/2025] [Indexed: 05/14/2025]
Abstract
BACKGROUND The oriental fruit fly, Bactrocera dorsalis, causes significant economic losses in fruit production because of its high reproductive rate and adaptability. The current study investigated the sublethal and lethal effects of avermectin, a macrocyclic lactone insecticide, on the F0 and F1 generations of B. dorsalis. RESULTS This study demonstrated that exposure to avermectin with sublethal and lethal (LC5, LC20, and LC50) concentrations reduced mating rates, prolonged pre-mating periods, and lowered levels of juvenile hormone (JH) and 20-hydroxyecdysone (20E). Furthermore, avermectin exposure resulted in a decrease in vitellogenin (Vg) and vitellogenin receptor (VgR) levels, with downregulated expression of the corresponding genes. Subsequent investigations revealed that avermectin exposure led to reduced sugar accumulation indicated by decreased glycogen, glucose and trehalose levels, alongside impaired trehalase activities and lower triglyceride content in the F0 generation of B. dorsalis. These metabolic disruptions contributed to decreased hatching, pupation and emergence rates, and lower pupal weights and reproductive parameters (as demonstrated by life table parameters) in the F1 generation. Furthermore, increased activities of detoxifying enzymes such as glutathione S-transferase, carboxylesterase and cytochrome P450 monooxygenases were found, suggesting an adaptive response to detoxify avermectin. CONCLUTION These findings highlight the potential long-term impacts of avermectin on B. dorsalis population dynamics and underscore the need for incorporating considerations of sublethal effects into integrated pest management strategies. © 2025 Society of Chemical Industry.
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Affiliation(s)
- Zhen Li
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xiaolong Wang
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Mengyuan Ren
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Zhenya Li
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Yuqiang Xi
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Lijuan Su
- College of Life Sciences, Henan Agricultural University, Zhengzhou, China
| | - Qisheng Song
- Division of Plant Science and Technology, University of Missouri, Columbia, Missouri, USA
| | - Guoyan Zhang
- Plant Protection and Quarantine Station of Henan Province, Zhengzhou, China
| | - Shiheng An
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
| | - Xinming Yin
- Henan International Laboratory for Green Pest Control/College of Plant Protection, Henan Agricultural University, Zhengzhou, China
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Li HF, Dong B, Peng YY, Luo HY, Ou XL, Ren ZL, Park Y, Wang JJ, Jiang HB. The neuropeptide sulfakinin is a peripheral regulator of insect behavioral switch between mating and foraging. eLife 2025; 13:RP100870. [PMID: 40314230 PMCID: PMC12048153 DOI: 10.7554/elife.100870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2025] Open
Abstract
Behavioral strategies for foraging and reproduction in the oriental fruit fly (Bactrocera dorsalis) are alternative options for resource allocation and are controlled by neuropeptides. Here, we show that the behavioral switch between foraging and reproduction is associated with changes in antennal sensitivity. Starved flies became more sensitive to food odors while suppressing their response to opposite-sex pheromones. The gene encoding sulfakinin receptor 1 (SkR1) was significantly upregulated in the antennae of starved flies, so we tested the behavioral phenotypes of null mutants for the genes encoding the receptor (skr1-/-) and its ligand sulfakinin (sk-/-). In both knockout lines, the antennal responses shifted to mating mode even when flies were starved. This suggests that sulfakinin signaling via SkR1 promotes foraging while suppressing mating. Further analysis of the mutant flies revealed that sets of odorant receptor (OR) genes were differentially expressed. Functional characterization of the differentially expressed ORs suggested that sulfakinin directly suppresses the expression of ORs that respond to opposite-sex hormones while enhancing the expression of ORs that detect food volatiles. We conclude that sulfakinin signaling via SkR1, modulating OR expressions and leading to altered antenna sensitivities, is an important component in starvation-dependent behavioral change.
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Affiliation(s)
- Hong-Fei Li
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Bao Dong
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Yuan-Yuan Peng
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Hao-Yue Luo
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Xiao-Lan Ou
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Zheng-Lin Ren
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Yoonseong Park
- Department of Entomology, Kansas State UniversityManhattan KSUnited States
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
| | - Hong-Bo Jiang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest UniversityChongqingChina
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest UniversityChongqingChina
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Meng LW, Luo ZY, Zhang FQ, Dong YX, Ye C, Zhang W, Wang JJ. Increased expression of an isoform of the long non-coding RNA, lnc37707, is associated with malathion resistance in Bactrocera dorsalis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2025; 209:106343. [PMID: 40082034 DOI: 10.1016/j.pestbp.2025.106343] [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: 12/27/2024] [Revised: 02/03/2025] [Accepted: 02/19/2025] [Indexed: 03/16/2025]
Abstract
The oriental fruit fly, Bactrocera dorsalis (Hendel) is an invasive pest threatening global fruit industries. Field populations of B. dorsalis exhibit complex insecticide resistance, hindering pest control efforts and exacerbating damage. Long non-coding RNAs (lncRNAs) are critical regulators of multiple bioprocess in insects, including insecticide resistance, and have potentials as novel target for pest management. Here, the candidate lncRNAs associated with malathion resistance in B. dorsalis were identified through RNA-seq. One of the isoforms of lnc37707, designated as lnc37707.10, was significantly enriched in the detoxification tissues of malathion-resistant (MR) strain. A specific fragment of lnc37707.10 (sflnc37707) was strongly associated with malathion resistance, and silencing sflnc37707 increased the susceptibility, whereas overexpressing it decreased susceptibility to malathion. Silencing sflnc37707 resulted in the down-regulation of 248 genes, but none of them included the four adjacent genes as its potential target. Instead, pathway analysis revealed significant enrichment of down-regulated genes involved in drug and xenobiotics metabolism, including P450s and GSTs. Bioinformatic analysis suggested a potential regulatory role of miRNA in the function of lnc37707. Further combining silence or overexpression sflnc37707 with miRNA mimic treatment identified that BdGSTd10 (an important gene involved in malathion resistance) and miR-1000 was strongly linked to lnc37707.10. Finally, a ceRNA (competing endogenous RNA) regulatory axis was proposed, where lnc37707.10 might indirectly modulate BdGSTd10 by sponging miR-1000 to regulate the malathion resistance in B. dorsalis. These findings provide a new insight into insecticide resistance and a potential lncRNA target for the sustainable pest management.
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Affiliation(s)
- Li-Wei Meng
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Zong-Yu Luo
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
| | - Fu-Qiang Zhang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
| | - Yi-Xuan Dong
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China
| | - Chao Ye
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
| | - Wei Zhang
- Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China; Citrus Research Institute, Southwest University, National Citrus Engineering Research Center, Chongqing 400712, China.
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing 400716, China.; Key Laboratory of Agricultural Biosafety and Green Production of Upper Yangtze River (Ministry of Education), Academy of Agricultural Sciences, Southwest University, Chongqing 400715, China.
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Zhang Q, Chen H, Li Z, Qiao J, Liu P, Zheng C, Deng Z, Li X, Zhang H. Bdyof is a Y-chromosome-specific gene required for male development in Bactrocera dorsalis. PEST MANAGEMENT SCIENCE 2025; 81:1785-1793. [PMID: 39611441 DOI: 10.1002/ps.8577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2024] [Revised: 11/20/2024] [Accepted: 11/20/2024] [Indexed: 11/30/2024]
Abstract
BACKGROUND In many organisms, the Y chromosome contains important genes associated with sex determination and male reproductive development. However, there have been few studies of Y-chromosome-specific genes in non-model species due to the incomplete information of Y chromosome genome and difficulty in sequencing. Here, we screened 90 candidate Y-specific sequences in a constructed transcriptome assembly library by using the chromosome quotient method, among which 11 were unreported sequences associated with male reproductive development, including Bactrocera dorsalis Y-specific Oligozoospermia factor (Bdyof) with the highest expression in the testis. RESULTS CRISPR/Cas9-mediated knockout of Bdyof resulted in abnormal testis development, significantly reduced sperm count, and obviously lower egg hatching rate in homozygous mutant flies. In addition, Bdyof knockout decreased the expression of dsx-M. CONCLUSION This results provides new insights into the biological processes related to male reproductive development controlled by the Y-chromosome-specific gene Bdyof, thus providing a promising molecular target for the study of agricultural pests. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Qiuyuan Zhang
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hao Chen
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Ziniu Li
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jiao Qiao
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Peipei Liu
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Chenjun Zheng
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Zhurong Deng
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Xiaoxue Li
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hongyu Zhang
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
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Hu Y, Wang ML, Yang RL, Shao ZK, Du YH, Kang Y, Zhu YX, Xue XF. Symbiotic bacteria play crucial roles in a herbivorous mite host suitability. PEST MANAGEMENT SCIENCE 2025; 81:1657-1668. [PMID: 39623774 DOI: 10.1002/ps.8571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2024] [Revised: 11/07/2024] [Accepted: 11/14/2024] [Indexed: 02/14/2025]
Abstract
BACKGROUND The tomato russet mite (TRM), Aculops lycopersici, is a strictly herbivorous and economically significant pest that infests Solanaceae plants, but its host suitability varies, showing high performance on tomatoes. Although symbiotic bacteria have been suggested to play crucial roles in the host adaptation of herbivores, their effects on TRM remain unclear. RESULTS In this study, using next generation high-throughput sequencing of the bacterial 16S rRNA data, we identified the bacterial diversity and community composition of TRM feeding on tomato, eggplant, and chili. Our results show no significant difference in the bacterial community composition of TRM across three host plants. However, the relative density of Escherichia coli (TRM_Escherichia) showed 9.36-fold higher on tomato than on eggplant and chili. These results align with the observed TRM performance among three host plants. When TRM_Escherichia was reduced using antibiotics, the treated TRM decreased the population density on tomato. However, when we transferred TRM from eggplant to tomato, the population density of TRM increased, coinciding with an increase of the TRM_Escherichia density. These results indicate that TRM_Escherichia may affect the host suitability of TRM. Our fluorescence in situ hybridization (FISH) results further showed that TRM_Escherichia is primarily distributed in the salivary glands. Metagenomic data results suggest that TRM_Escherichia functions in food digestion and energy metabolism. CONCLUSION We provided the first comprehensive analysis of TRM bacterial communities. Our findings demonstrate that the symbiotic bacterium TRM_Escherichia may play crucial roles in the suitability of TRM feeding on different Solanaceae hosts. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Yue Hu
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Mei-Ling Wang
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Ruo-Lan Yang
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Zi-Kai Shao
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Yun-Hao Du
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Yi Kang
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Yu-Xi Zhu
- Department of Entomology, College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Xiao-Feng Xue
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
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Wang L, Zhao Z. Seasonal drought drives sugarcane borer outbreaks. JOURNAL OF ECONOMIC ENTOMOLOGY 2025; 118:145-151. [PMID: 39550210 DOI: 10.1093/jee/toae275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2024] [Revised: 10/26/2024] [Accepted: 11/02/2024] [Indexed: 11/18/2024]
Abstract
Sugarcane borers (SCB) pose a major threat to sugarcane production. Effective pest management requires detailed knowledge of SCB phenology and population dynamics in responses to environmental changes. This study tested the hypothesis that drought drives SCB outbreaks and identified season-specific effects by investigating large-scale field data of these pests in 4 key sugarcane-growing provinces in south subtropical and tropical China (Guangxi, Guangdong, Yunnan, and Hainan) from 1987 to 2018. The standardized precipitation evapotranspiration index was used as a drought indicator at various time scales. We found that drought during a specific month can result in significant changes in the annual SCB outbreak status, such as November in Guangxi, June in Yunnan, and September in Hainan. By summarizing seasonal effects of drought across study locations, we found a general pattern that SCB outbreaks increased with drier conditions in summer, whereas they were promoted by wetter conditions in fall. This research provides crucial knowledge for predicting SCB outbreaks under seasonal and climate changes. This information is also highly critical for increasing the efficiency and accuracy of integrated pest management strategies.
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Affiliation(s)
- Leyun Wang
- Guangxi Key Laboratory of Agro-Environment and Agric-Product Safety, College of Agriculture, Guangxi University, Nanning, China
- National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi, China
- Department of Plant Biosecurity & Key Laboratory of Surveillance and Management for Plant Quarantine Pests, China Agricultural University, Beijing, China
| | - Zihua Zhao
- Department of Plant Biosecurity & Key Laboratory of Surveillance and Management for Plant Quarantine Pests, China Agricultural University, Beijing, China
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Haider K, Sufian M, Abbas D, Kabir K, Ali MS, Kausar Y, Ghafar MA. The Role of Gut Microbiota in Shaping Immune Responses in Tephritidae Fruit Fly and Prospective Implications for Management. NEOTROPICAL ENTOMOLOGY 2025; 54:34. [PMID: 39881025 DOI: 10.1007/s13744-025-01248-8] [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: 08/30/2024] [Accepted: 12/21/2024] [Indexed: 01/31/2025]
Abstract
The interaction of microbial communities with host immunity has become one of the most explored research areas with significant implications for pest control strategies. It has been found that the gut microbiota plays substantial roles in immune response regulation and host-gut microbiome symbiosis, as well as in pathogen resistance and overall fitness in Tephritidae fruit flies that are major pests of agricultural importance. In this review, we discuss the modulation of immune responses of Tephritidae fruit flies by the gut microbiota with particular emphasis on the general interactions between microbiota and the immune system. These interactions help to unravel new horizons of pest management. Regulating gut microbiota modifies the performance of biological control agents and SIT and allows the creation of microbial therapies that affect the vital physiological functions of fruit flies. Besides, deploying microbes that can modulate the immune response and using microbial-derived signals provide an eco-friendly and more sustainable way of eradicating chemical pesticides and making farming systems less susceptible to climatic variability. This paper reviews various aspects of the possibility of using gut microbiota for changing the approach to Integrated Pest Management (IPM) programs that would improve methods of controlling Tephritidae fruit fly populations more ecologically.
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Affiliation(s)
- Kamran Haider
- Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural Univ, Wuhan, People's Republic of China
| | - Muhammad Sufian
- Dept of Entomology, Univ of Agriculture, Faisalabad, Pakistan
| | - Dilawar Abbas
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kamil Kabir
- State Key Laboratory of Agricultural Microbiology, Key Laboratory of Horticultural Plant Biology (MOE), China-Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural Univ, Wuhan, People's Republic of China
| | | | - Yasmin Kausar
- Department of Zoology Wildlife and Fisheries, Univ of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Adeel Ghafar
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Bio Pesticide and Chemical Biology, MOE, College of Plant Protection, Fujian Agriculture and Forestry Univ, Fuzhou, China.
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Liu J, Zhu M, Shi X, Hui C, Sun Y, Zhang R, Jin D, Li Z, Chen H, Zhao Z. Cascading impacts of nitrogen deposition on soil microbiome and herbivore communities in desert steppes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:176892. [PMID: 39419226 DOI: 10.1016/j.scitotenv.2024.176892] [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: 08/19/2024] [Revised: 10/09/2024] [Accepted: 10/10/2024] [Indexed: 10/19/2024]
Abstract
Human activities in the last century have intensified global nitrogen deposition, resulting in the degradation of ecosystem function and loss of biodiversity worldwide. Nitrogen addition is a crucial method for examining the effects of atmospheric nitrogen deposition on species composition and structure of soil microbiome and biotic community, as exogenous nitrogen inputs can trigger cascading effects on ecosystem functions. In a 6-year experiment, we evaluated the impact of nitrogen addition on soil microbial-plant-insect systems in desert steppes. Our results show that nitrogen addition significantly altered soil microbial composition and ecological function, leading to a decrease in nitrogen-fixing bacteria and an increase in saprophytic fungi. High levels of nitrogen addition increased total plant biomass while decreasing species diversity. Additionally, high nitrogen addition levels suppressed below-ground biomass of gramineae and legumes compared to low nitrogen addition. Nitrogen addition also increased herbivore abundance by altering insect community structure, particularly benefiting chewing pests over sucking pests, thus heightening the risk of biological disasters through trophic cascading effects. Consequently, excessive nitrogen addition may destabilize desert steppe ecosystems by disturbing soil microbial-plant-insect interactions, hindering the maintenance of biotic community diversity and steppe productivity.
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Affiliation(s)
- Jingxi Liu
- Department of Plant Biosecurity, China Agricultural University, Beijing 100193, China
| | - Mengmeng Zhu
- Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
| | - Xiangfeng Shi
- Institute of Design and Agricultural Survey in Ningxia, Yinchuan 750002, China
| | - Cang Hui
- Department of Mathematical Sciences, Centre for Invasion Biology, Stellenbosch University, Matieland 7600, South Africa; Biodiversity Informatics Unit, African Institute for Mathematical Sciences, Cape Town 7100, South Africa
| | - Yurong Sun
- Institute of Design and Agricultural Survey in Ningxia, Yinchuan 750002, China
| | - Rong Zhang
- Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
| | - Decai Jin
- Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhihong Li
- Department of Plant Biosecurity, China Agricultural University, Beijing 100193, China
| | - Honghao Chen
- Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
| | - Zihua Zhao
- Department of Plant Biosecurity, China Agricultural University, Beijing 100193, China.
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10
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de Deus E, Passos J, van Sauers-Muller A, Jesus C, Silva JG, Adaime R. Phylogeography of the Invasive Fruit Fly Species Bactrocera carambolae Drew & Hancock (Diptera: Tephritidae) in South America. INSECTS 2024; 15:949. [PMID: 39769551 PMCID: PMC11677519 DOI: 10.3390/insects15120949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2024] [Revised: 11/20/2024] [Accepted: 11/23/2024] [Indexed: 01/11/2025]
Abstract
The carambola fruit fly, Bactrocera carambolae Drew & Hancock, is native to Southeast Asia, infests about 150 plant species, and is considered a quarantine pest insect in several regions of the world. Bactrocera carambolae has invaded Suriname, French Guyana, and northern Brazil. In Brazil, it was first recorded in 1996 and has been restricted to the states of Amapá and Roraima due to official control efforts of the Ministry of Agriculture and Food Supply (Ministério da Agricultura e Pecuária-MAPA). This is the first study to estimate the genetic structure and diversity of South American populations of B. carambolae. A total of 116 individuals from 11 localities in Brazil and 7 localities in Suriname were analyzed. Additional sequences available at GenBank from Indonesia (Lampung) and Thailand (San Pa Tong and Muang District) were also used in the analysis. We sequenced a fragment of the mitochondrial gene cytochrome oxidase subunit I. A total of 35 haplotypes were found. Haplotypes from Indonesia were closest to the haplotypes from South America, separated only by a few mutational steps. This suggests that Indonesia is the likely source for the introduction of B. carambolae into South America. The Southeast Asian populations appeared as the most ancestral group in the phylogenetic trees. The high similarity and sharing of several haplotypes among populations within South America indicate a lack of genetic structure. The mismatch distribution and neutrality tests suggest that South American populations have undergone a rapid growth and expansion following a single founder event. The low genetic diversity and the population expansion evidenced by the neutrality tests lend support to the hypothesis of a recent introduction of a single lineage of the carambola fruit fly into South America.
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Affiliation(s)
- Ezequiel de Deus
- Instituto Federal do Amapá, Rodovia BR 210 KM 3, s/n, Macapá 68909-398, Amapá, Brazil;
- Departamento de Ciências Biológicas e da Saúde, Universidade Federal do Amapá, Programa de Pós-Graduação em Biodiversidade Tropical, Rodovia JK, Km 4, Macapá 68902-280, Amapá, Brazil
| | - Joseane Passos
- Departamento de Biologia, Centro de Estudos Superiores de Coelho Neto, Universidade Estadual do Maranhão, Rua Antônio Guimarães, s/n, Olha D’Aguinha, Coelho Neto 65620-000, Maranhão, Brazil
| | - Alies van Sauers-Muller
- Fruit Fly Program, Agricultural Experiment Station, Ministry of Agriculture, Animal Husbandry and Fisheries, Paramaribo, Suriname;
| | - Cristiane Jesus
- Laboratório de Proteção de Plantas, Embrapa Amapá, Rodovia JK, Km 5, nº 2600, Macapá 68903-419, Amapá, Brazil;
| | - Janisete Gomes Silva
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km 16, Ilhéus 45662-900, Bahia, Brazil
| | - Ricardo Adaime
- Laboratório de Proteção de Plantas, Embrapa Amapá, Rodovia JK, Km 5, nº 2600, Macapá 68903-419, Amapá, Brazil;
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11
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Yan X, Zhao Z, Feng S, Zhang Y, Wang Z, Li Z. Multi-omics analysis reveal the fall armyworm Spodoptera frugiperda tolerate high temperature by mediating chitin-related genes. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2024; 174:104192. [PMID: 39401552 DOI: 10.1016/j.ibmb.2024.104192] [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: 07/29/2024] [Revised: 10/02/2024] [Accepted: 10/11/2024] [Indexed: 10/19/2024]
Abstract
Climate change facilitates the rapid invasion of agricultural pests, threatening global food security. The fall armyworm Spodoptera frugiperda is a highly polyphagous migratory pest tolerant to high temperatures, allowing its proliferation in harsh thermal environments. We aimed to demonstrate mechanisms of its high-temperature tolerance, particularly transcriptional and metabolic regulation, which are poorly understood. To achieve the aim, we examined the impact and mechanism of heat events on S. frugiperda by using multiple approaches: ecological measurements, transcriptomics, metabolomics, RNAi, and CRISPR/Cas9 technology. We observed that several physiological indices (larval survival rate, larval period, pupation rate, pupal weight, eclosion rate, and average fecundity) decreased as the temperature increased, with the 32 °C treatment displaying a significant difference from the control group at 26 °C. Significantly upregulated expression of genes encoding endochitinase and chitin deacetylase was observed in the chitin-binding, extracellular region, and carbohydrate metabolic process GO terms of hemolymph, fat body, and brain, exhibiting a tissue-specific pattern. Significantly enriched pathways (e.g., cutin, suberin, and wax biosynthesis; oxidative phosphorylation and cofactor biosynthesis; diverse amino acid biosynthesis and degradation; carbon metabolism; and energy metabolism), all of which are essential for S. frugiperda larvae to tolerate temperature, were found in metabolites that were expressed differently. Successful RNA interference targeting of the three chitin-related genes reduced gene expression levels and larval survival rate. Knockout of the endochitinase gene by using the CRISPR/Cas9 system significantly reduced the relative gene expression and increased sensitivity to high-temperature exposure. On the basis of our findings, theoretical foundations for understanding the high-temperature tolerance of S. frugiperda populations and latent genetic control strategies were established.
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Affiliation(s)
- Xiaorui Yan
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing, 100193, China; Sanya Institute of China Agricultural University, Sanya, 572025, China
| | - Zihua Zhao
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing, 100193, China; Sanya Institute of China Agricultural University, Sanya, 572025, China
| | - Shiqian Feng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Yongjun Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Zhenying Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Zhihong Li
- MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing, 100193, China; Sanya Institute of China Agricultural University, Sanya, 572025, China.
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12
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Fan Y, Qin Y, Dong X, Wang Z, Zhou H. Identification and expression patterns of voltage-gated sodium channel genes with intron retentions in different strains of Bactrocera dorsalis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 204:106084. [PMID: 39277397 DOI: 10.1016/j.pestbp.2024.106084] [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: 06/11/2024] [Revised: 08/08/2024] [Accepted: 08/12/2024] [Indexed: 09/17/2024]
Abstract
Pyrethroid are the primary insecticides used for controlling of Bactricera dorsalis, a highly destructive and invasive fruit pest. Field populations have developed serious resistance, especially to β-cypermethrin. While mutations in the voltage-gated sodium channel (Vgsc) are a common mechanism of pyrethroid resistance, variations in BdVgsc associated with β-cypermethrin resistance remain unclear. Here, we reported the resistance levels of five field populations from China, with resistance ratio ranging from 1.54 to 21.34-fold. Cloning the full length of BdVgsc revealed no specific or known amino acid mutations between the most resistant population and the susceptible strain. However, three types of partial intron retention (IRE4-5, IRE19-f and IREL-24) were identified in BdVgsc transcripts, with these intron retentions containing stop codons. The expression of IRE4-5 transcripts and total BdVgsc showed different trends across developmental stages and tissues. Exposure to β-cypermethrin led to increased expression of IRE4-5. Comparison of genomic and transcriptional sequences reveled that IRE4-5 transcripts had two types (IRE4-5.5 T and IRE4-5.6 T) caused by genomic variations. Both field and congenic strains indicated that homozygotes for IRE4-5.5 T had lower IRE4-5 transcript levels than homozygotes for IRE4-5.6 T. However, congenic and field strains exhibited inconsistent results about the association of expression levels of IRE4-5 transcripts with sensitivity to β-cypermethrin. In summary, this study is the first to identify intron retention transcripts in the Vgsc gene from B. dorsalis and to examine their expression patterns across different developmental stages, tissues, and strains with varying sensitivities to β-cypermethrin. The potential role of the intron retentions of BdVgsc in insecticide toxicity is also discussed.
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Affiliation(s)
- Yinjun Fan
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Shandong Province Centre for Bio-invasions and Eco-security, China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China
| | - Yu Qin
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Shandong Province Centre for Bio-invasions and Eco-security, China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China
| | - Xinyi Dong
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Shandong Province Centre for Bio-invasions and Eco-security, China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China
| | - Zixuan Wang
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Shandong Province Centre for Bio-invasions and Eco-security, China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China
| | - Hongxu Zhou
- Shandong Engineering Research Center for Environment-friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Shandong Province Centre for Bio-invasions and Eco-security, China-Australia Cooperative Research Center for Crop Health and Biological Invasions, Qingdao 266109, PR China.
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Econdi S, Bisio C, Carniato F, Marchesi S, Paul G, Gargani E, Cutino I, Caselli A, Guidotti M. Aldehyde-containing clays: a sustainable approach against the olive tree pest, Bactrocera oleae. Dalton Trans 2024; 53:9995-10006. [PMID: 38814123 DOI: 10.1039/d4dt00705k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
A set of organic/inorganic layered materials was obtained by functionalizing a montmorillonite-containing bentonite natural clay with linear aliphatic C6 or C7 aldehydes through a cost-effective and technologically simple incipient-wetness deposition method. The solids were investigated by means of a multi-technique approach (X-ray powder diffraction, XRPD, scanning electron microscopy, SEM, Fourier-transform infrared spectroscopy, FT-IR, thermogravimetric analysis, TGA, elemental analysis and solid-state nuclear magnetic resonance, ssNMR) to clarify the nature of the deposited organic species and the mode of interaction between the aldehyde and the clay. Since both natural clays and short-chain linear aldehydes find application as alternative strategies in the control of the olive fruit fly, Bactrocera oleae, the hybrid layered materials were tested under real-life conditions and their insect-inhibiting capability was evaluated in open-field trials on olive tree orchards in Tuscany, Central Italy. Specific tests were conducted to evaluate the resistance of the solids to weathering and their capability to provide a constant and long-lasting release of the bioactive ingredient. Aldehyde-containing bentonite clays have shown promising performance in controlling B. oleae infestation (with up to 86-95% reduction of affected olive fruits) in open-field trials across two years in two locations with different pedological and meteo-climatic characteristics.
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Affiliation(s)
- Stefano Econdi
- CNR-Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Via C. Golgi 19, Milan, Italy.
- Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, Milan, Italy
| | - Chiara Bisio
- CNR-Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Via C. Golgi 19, Milan, Italy.
- Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Via T. Michel, Alessandria, Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Via T. Michel, Alessandria, Italy
| | - Stefano Marchesi
- Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Via T. Michel, Alessandria, Italy
| | - Geo Paul
- Dipartimento di Scienze e Tecnologie Avanzate, Università del Piemonte Orientale, Via T. Michel, Alessandria, Italy
| | - Elisabetta Gargani
- Consiglio per la Ricerca in agricoltura e l'analisi dell'Economia Agraria CREA- Centro di ricerca Difesa e Certificazione DC, Florence, Italy
| | - Ilaria Cutino
- Consiglio per la Ricerca in agricoltura e l'analisi dell'Economia Agraria CREA- Centro di ricerca Difesa e Certificazione DC, Florence, Italy
| | - Alessandro Caselli
- Dipartimento di Chimica, Università degli Studi di Milano, Via C. Golgi 19, Milan, Italy
| | - Matteo Guidotti
- CNR-Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", Via C. Golgi 19, Milan, Italy.
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14
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Wang Y, Zhao Y, Zhang J, Li Z. Heat Shock Protein Genes Affect the Rapid Cold Hardening Ability of Two Invasive Tephritids. INSECTS 2024; 15:90. [PMID: 38392510 PMCID: PMC10889258 DOI: 10.3390/insects15020090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/24/2024]
Abstract
Bactrocera dorsalis and Bactrocera correcta are two invasive species that can cause major economic damage to orchards and the fruit import and export industries. Their distribution is advancing northward due to climate change, which is threatening greater impacts on fruit production. This study tested the rapid cold-hardening ability of the two species and identified the temperature associated with the highest survival rate. Transcriptome data and survival data from the two Bactrocera species' larvae were obtained after rapid cold-hardening experiments. Based on the sequencing of transcripts, four Hsp genes were found to be affected: Hsp68 and Hsp70, which play more important roles in the rapid cold hardening of B. dorsalis, and Hsp23 and Hsp70, which play more important roles in the rapid cold hardening of B. correcta. This study explored the adaptability of the two species to cold, demonstrated the expression and function of four Hsps in response to rapid cold hardening, and explained the occurrence and expansion of these two species of tephritids, offering information for further studies.
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Affiliation(s)
- Yuning Wang
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing 100193, China
- Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Yan Zhao
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing 100193, China
- Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Junzheng Zhang
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Zhihong Li
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing 100193, China
- Key Laboratory of Surveillance and Management for Plant Quarantine Pests, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
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15
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Papadopoulos NT, De Meyer M, Terblanche JS, Kriticos DJ. Fruit Flies: Challenges and Opportunities to Stem the Tide of Global Invasions. ANNUAL REVIEW OF ENTOMOLOGY 2024; 69:355-373. [PMID: 37758223 DOI: 10.1146/annurev-ento-022723-103200] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Global trade in fresh fruit and vegetables, intensification of human mobility, and climate change facilitate fruit fly (Diptera: Tephritidae) invasions. Life-history traits, environmental stress response, dispersal stress, and novel genetic admixtures contribute to their establishment and spread. Tephritids are among the most frequently intercepted taxa at ports of entry. In some countries, supported by the rules-based trade framework, a remarkable amount of biosecurity effort is being arrayed against the range expansion of tephritids. Despite this effort, fruit flies continue to arrive in new jurisdictions, sometimes triggering expensive eradication responses. Surprisingly, scant attention has been paid to biosecurity in the recent discourse about new multilateral trade agreements. Much of the available literature on managing tephritid invasions is focused on a limited number of charismatic (historically high-profile) species, and the generality of many patterns remains speculative.
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Affiliation(s)
- Nikos T Papadopoulos
- Department of Agriculture Crop Production and Rural Environment, University of Thessaly, Volos, Greece;
| | - Marc De Meyer
- Department of Biology, Royal Museum for Central Africa, Tervuren, Belgium;
| | - John S Terblanche
- Department of Conservation Ecology & Entomology, Stellenbosch University, Stellenbosch, South Africa;
| | - Darren J Kriticos
- Cervantes Agritech, Canberra, Australian Capital Territory, Australia;
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Liu Y, Luo R, Bai S, Lemaitre B, Zhang H, Li X. Pathobiont and symbiont contribute to microbiota homeostasis through Malpighian tubules-gut countercurrent flow in Bactrocera dorsalis. THE ISME JOURNAL 2024; 18:wrae221. [PMID: 39530356 PMCID: PMC11697180 DOI: 10.1093/ismejo/wrae221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 09/18/2024] [Accepted: 11/08/2024] [Indexed: 11/16/2024]
Abstract
Host-gut microbiota interactions are more complex than good or bad. Both gut symbiotic bacteria and pathobionts can provide essential functions to their host in one scenario and yet be detrimental to host health in another. So, these gut-dwelling bacteria must be tightly controlled to avoid harmful effects on the host. However, how pathobionts and other symbiotic bacteria coordinate to establish a host immune defense system remains unclear. Here, using a Tephritidae fruit fly Bactrocera dorsalis, we report that both pathobionts and other gut symbiotic bacteria release tyramine, which is recognized by the host insects. These tyramines induce the formation of insect-conserved Malpighian tubules-gut countercurrent flow upon bacterial infection, which requires tyramine receptors and aquaporins. At the same time, pathobionts but not gut symbiotic bacteria induce the generation of reactive oxygen species, which are preserved by the countercurrent flow, promoting bacteria elimination through increasing gut peristalsis. More importantly, our results show that the Malpighian tubules-gut countercurrent flow maintains proper microbiota composition. Our work suggests a model where pathobiont-induced reactive oxygen species are preserved by Malpighian tubules-gut countercurrent flow involving both pathobionts and symbiotic bacteria. Furthermore, our work provides a Malpighian tubules-gut interaction that ensures efficient maintenance of the gut microbiota.
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Affiliation(s)
- Yanning Liu
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, China–Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, China
| | - Rengang Luo
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, China–Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, China
| | - Shuai Bai
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, China–Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, China
| | - Bruno Lemaitre
- Global Health Institute, School of Life Science, École Polytechnique Fédérale de Lausanne (EPFL), Station 19, 1015, Lausanne, Switzerland
| | - Hongyu Zhang
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, China–Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, China
| | - Xiaoxue Li
- National Key Laboratory for Germplasm Innovation and Utilization for Fruit and Vegetable Horticultural Crops, Hubei Hongshan Laboratory, China–Australia Joint Research Centre for Horticultural and Urban Pests, Institute of Urban and Horticultural Entomology, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei Province 430070, China
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