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Li R, Du Y, Zhou Y, Ouyang Z. Identification of HSP70 genes in Diaphorina citri Kuwayama Reveals Their Involvement in Immunity and Development. Mol Biotechnol 2024:10.1007/s12033-024-01232-4. [PMID: 38940979 DOI: 10.1007/s12033-024-01232-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 06/13/2024] [Indexed: 06/29/2024]
Abstract
Huanglongbing (HLB), a global citrus threat, is transmitted by Diaphorina citri Kuwayama, a widespread insect pest. The disease's rapid spread and incurability necessitate efficient, sustainable control strategies. This study investigates heat shock protein 70 (HSP70) genes in D. citri, known to play a pivotal role in insect survival and stress response. The genome-wide identification, gene structure analysis, and conserved protein domain analysis of 22 HSP70 genes in D. citri were performed. Furthermore, the expression of these genes during HLB infection or developmental processes was gauged. Phylogenetic analysis revealed the functional categorization of the identified genes, while gene structure and conserved motifs offered insights into gene function. The expression analysis unveiled dynamic profiles in response to infection and across development stages, potentially aiding future targeted pest control strategies. These findings offer promising leads for the design of novel inhibitors or RNAi strategies targeting D. citri and HLB.
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Affiliation(s)
- Ruimin Li
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China.
| | - Yimin Du
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China
- National Navel Orange Engineering Research Center, Ganzhou, 341000, China
| | - Yan Zhou
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China
| | - Zhigang Ouyang
- College of Life Sciences, Gannan Normal University, Ganzhou, 341000, China
- National Navel Orange Engineering Research Center, Ganzhou, 341000, China
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2
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Liu Y, Xiao W, Wang F, Wang Y, Dong Y, Nie W, Tan C, An S, Chang E, Jiang Z, Wang J, Jia Z. Adaptive divergence, historical population dynamics, and simulation of suitable distributions for Picea Meyeri and P. Mongolica at the whole-genome level. BMC PLANT BIOLOGY 2024; 24:479. [PMID: 38816690 PMCID: PMC11137980 DOI: 10.1186/s12870-024-05166-6] [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: 01/17/2024] [Accepted: 05/17/2024] [Indexed: 06/01/2024]
Abstract
The taxonomic classification of Picea meyeri and P. mongolica has long been controversial. To investigate the genetic relatedness, evolutionary history, and population history dynamics of these species, genotyping-by-sequencing (GBS) technology was utilized to acquire whole-genome single nucleotide polymorphism (SNP) markers, which were subsequently used to assess population structure, population dynamics, and adaptive differentiation. Phylogenetic and population structural analyses at the genomic level indicated that although the ancestor of P. mongolica was a hybrid of P. meyeri and P. koraiensis, P. mongolica is an independent Picea species. Additionally, P. mongolica is more closely related to P. meyeri than to P. koraiensis, which is consistent with its geographic distribution. There were up to eight instances of interspecific and intraspecific gene flow between P. meyeri and P. mongolica. The P. meyeri and P. mongolica effective population sizes generally decreased, and Maxent modeling revealed that from the Last Glacial Maximum (LGM) to the present, their habitat areas decreased initially and then increased. However, under future climate scenarios, the habitat areas of both species were projected to decrease, especially under high-emission scenarios, which would place P. mongolica at risk of extinction and in urgent need of protection. Local adaptation has promoted differentiation between P. meyeri and P. mongolica. Genotype‒environment association analysis revealed 96,543 SNPs associated with environmental factors, mainly related to plant adaptations to moisture and temperature. Selective sweeps revealed that the selected genes among P. meyeri, P. mongolica and P. koraiensis are primarily associated in vascular plants with flowering, fruit development, and stress resistance. This research enhances our understanding of Picea species classification and provides a basis for future genetic improvement and species conservation efforts.
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Affiliation(s)
- Yifu Liu
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Wenfa Xiao
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Fude Wang
- Heilongjiang Forestry Research Institute, Harbin, 150080, China
| | - Ya Wang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Yao Dong
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Wen Nie
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Cancan Tan
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Sanping An
- Research Institute of Forestry of Xiaolong Mountain, Gansu Provincial Key Laboratory of Secondary Forest Cultivation, Tianshui, 741022, China
| | - Ermei Chang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China
| | - Zeping Jiang
- Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing, 100091, China
| | - Junhui Wang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China.
| | - Zirui Jia
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China.
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Xie W, Deng X, Tao W, Zhang Z, Zhang H, Li Q, Jiang C. Sublethal effects of chlorantraniliprole on immunity in Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae): Promote encapsulation by upregulating a heat shock protein 70 family gene SfHSP68.1. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 201:105892. [PMID: 38685254 DOI: 10.1016/j.pestbp.2024.105892] [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: 11/04/2023] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 05/02/2024]
Abstract
As an agricultural pest, the fall armyworm (FAW), Spodoptera frugiperda, poses a severe threat to agriculture in China. Chlorantraniliprole has been widely used to control this pest. In our previous studies, we discovered that LD10, LD20, and LD30 chlorantraniliprole promoted encapsulation in the 4th instar larvae of the FAW, with LD30 chlorantraniliprole having the most significant effect. To further investigate the molecular mechanism underlying the sublethal effects of chlorantraniliprole on encapsulation in the FAW, this study conducted the effects of encapsulation in 4th instar larvae of the FAW exposed to LD30 chlorantraniliprole. Then, we analyzed the transcriptome of the FAW hemolymph treated with LD30 chlorantraniliprole and identified genes related to encapsulation using RNAi. Our results showed that the encapsulation in the FAW was enhanced at 6, 12, 18, 24, and 48 h after exposure to LD30 chlorantraniliprole. Additionally, LD30 chlorantraniliprole significantly affected the expression of certain immune-related genes, with the heat shock protein 70 family gene SfHSP68.1 showing the most significant upregulation. Subsequent interference with SfHSP68.1 resulted in a significant inhibition of encapsulation in FAW. These findings suggested that LD30 chlorantraniliprole can promote encapsulation in the FAW by upregulating SfHSP68.1 expression. This study provides valuable insights into the sublethal effects of chlorantraniliprole on encapsulation in the FAW and the interaction between encapsulation and heat shock proteins (HSPs).
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Affiliation(s)
- Wenqi Xie
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoyue Deng
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Wencai Tao
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhihui Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Huilai Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Qing Li
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Chunxian Jiang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
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Llorente L, Aquilino M, Herrero Ó, de la Peña E, Planelló R. Characterization and expression of heat shock and immune genes in natural populations of Prodiamesa olivacea (Diptera) exposed to thermal stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115359. [PMID: 37595349 DOI: 10.1016/j.ecoenv.2023.115359] [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: 05/31/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023]
Abstract
This paper characterizes the heat stress response (HSR) and explores the impact of temperatures on the immune response of larvae from two chironomid species, Prodiamesa olivacea and Chironomus riparius. Genes involved in crucial metabolic pathways were de novo identified in P. olivacea: Hsp27, Hsp60, Hsp70, Hsc70, Cdc37, and HSF for the heat stress response (HSR) and TOLL, PGRP, C-type lectin, and JAK/hopscotch for the immune system response (ISR). Quantitative real-time PCR was used to evaluate the expression levels of the selected genes in short-term treatments (up to 120') at high temperatures (35 °C and 39 °C). Exposing P. olivacea to elevated temperatures resulted in HSR induction with increased expression of specific heat shock genes, suggesting the potential of HSPs as early indicators of acute thermal stress. Surprisingly, we found that heat shock represses multiple immune genes, revealing the antagonist relation between the heat shock response and the innate immune response in P. olivacea. Our results also showed species-dependent gene responses, with more significant effects in P. olivacea, for most of the biomarkers studied, demonstrating a higher sensitivity in this species to environmental stress conditions than that of C. riparius. This work shows a multi-species approach that enables a deeper understanding of the effects of heat stress at the molecular level in aquatic dipterans.
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Affiliation(s)
- Lola Llorente
- Biology and Environmental Toxicology Group, Faculty of Science, Universidad Nacional de Educación a Distancia (UNED), 28232, Las Rozas, Madrid, Spain
| | - Mónica Aquilino
- Biology and Environmental Toxicology Group, Faculty of Science, Universidad Nacional de Educación a Distancia (UNED), 28232, Las Rozas, Madrid, Spain; School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Óscar Herrero
- Biology and Environmental Toxicology Group, Faculty of Science, Universidad Nacional de Educación a Distancia (UNED), 28232, Las Rozas, Madrid, Spain
| | - Eduardo de la Peña
- Institute for Subtropical and Mediterranean Horticulture (IHSM-UMA-CSIC), Spanish National Research Council (CSIC), Finca Experimental La Mayora, Algarrobo-Costa, 29750 Malaga, Spain; Department of Plants and Crops, Faculty of Bio-science Engineering, Ghent University, Coupure Links 653, Ghent 9000, Belgium
| | - Rosario Planelló
- Biology and Environmental Toxicology Group, Faculty of Science, Universidad Nacional de Educación a Distancia (UNED), 28232, Las Rozas, Madrid, Spain.
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Yang C, Ran X, Zhou Y, Huang Y, Yue G, Zhang M, Gong G, Chang X, Qiu X, Chen H. Study on the relationship of Hsp70 with the temperature sensitivity of pedunsaponin A poisoning Pomacea canaliculata. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 188:105243. [PMID: 36464353 DOI: 10.1016/j.pestbp.2022.105243] [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: 07/15/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 06/17/2023]
Abstract
Previous studies have found that temperature influences molluscicidal the activity of pedunsaponin A (PA), which may be related to the expression of Hsp70, a cold-tolerance gene in Pomacea canaliculata. We determined the temperature effect of PA and the relationship between Hsp70 and temperature sensitivity of P. canaliculata poisoned by PA. Toxicity tests resulted in LC50 values of 17.7239 mg⋅L-1 at 10 °C, which decreased to 2.5774 mg⋅L-1 at 30 °C, implying a positive correlation between toxicity of PA and temperature. After Hsp70 being interfered, the mortality rate of P. canaliculata treated with PA for 72 h was 70%, which was significantly higher than that of snails treated with PA for 72 h without interfering (56.7%). Meanwhile, immune enzyme activities such as SOD, ACP and AKP were significantly increased in the interfered group and expression level of PcAdv in the gill was also significantly increased. These results suggest that deletion of Hsp70 promotes the activation of some immune enzymes of P. canaliculata and elevates the content of target proteins to cope with the dual stresses of low temperatures and molluscicides. These findings indicate that the Hsp70 plays an important role in influencing the temperature sensitivity of P. canaliculata when treated with PA.
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Affiliation(s)
- Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiao Ran
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yue Zhou
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuting Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guizhou Yue
- College of Science, Sichuan Agricultural University, Ya'an 625014, China.
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoli Chang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xiaoyan Qiu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
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6
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Yang CL, Meng JY, Zhou L, Zhang CY. Induced heat shock protein 70 confers biological tolerance in UV-B stress-adapted Myzus persicae (Hemiptera). Int J Biol Macromol 2022; 220:1146-1154. [PMID: 36041575 DOI: 10.1016/j.ijbiomac.2022.08.159] [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: 06/29/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 11/05/2022]
Abstract
As an environmental stress factor, ultraviolet-B (UV-B) radiation directly affects insect growth, development, and reproduction. Heat shock protein 70s kDa (Hsp70s) plays an important role in the environmental adaptation of insects. To determine the role of MpHsp70s in the UV-B tolerance of Myzus persicae (Sulzer), we identified the complete complementary DNA sequences of seven MpHsp70s. They were found to be ubiquitously expressed during different developmental stages and were highly expressed in second-instar nymphs and wingless adults. The expression levels of the MpHsp70s were significantly upregulated when exposed to different durations of UV-B stress. Nanocarrier-mediated dsMpHsp70 suppressed the expression of the MpHsp70s and reduced the body length, weight, survival rate, and fecundity of M. persicae under UV-B exposure. When the combinational RNAi approach was adopted, the effects on the survival rate and fecundity were greater under UV-B stress, except for MpHsc70-4. These results suggest that MpHsp70s are essential for the resistance of M. persicae to UV-B stress.
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Affiliation(s)
- Chang-Li Yang
- Institute of Entomology, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou University, Guiyang, Guizhou 550025, China
| | - Jian-Yu Meng
- Guizhou Tobacco Science Research Institute, Guiyang, Guizhou 550081, China
| | - Lv Zhou
- Institute of Entomology, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou University, Guiyang, Guizhou 550025, China
| | - Chang-Yu Zhang
- Institute of Entomology, Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Guizhou University, Guiyang, Guizhou 550025, China.
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Dong B, Liu XY, Li B, Li MY, Li SG, Liu S. A heat shock protein protects against oxidative stress induced by lambda-cyhalothrin in the green peach aphid Myzus persicae. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 181:104995. [PMID: 35082025 DOI: 10.1016/j.pestbp.2021.104995] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/24/2021] [Accepted: 11/16/2021] [Indexed: 06/14/2023]
Abstract
Lambda-cyhalothrin (LCT) is a pyrethroid insecticide widely used to control insect pests. Insect exposure to LCT may cause abnormal accumulation of reactive oxygen species (ROS) and result in oxidative damage. Heat shock proteins (HSPs) may help protect against oxidative stress. However, little is known about the role of HSPs in response to LCT in the green peach aphid, Myzus persicae. This insect is an important agricultural pest causing severe yield losses in crops. In this study, we characterized a cDNA sequence (MpHsp70) encoding a member of the HSP70 family in M. persicae. MpHsp70 encoded a 623 amino acid protein putatively localized in the cytosol. The highest expression level of MpHsp70 occurred in fourth-instar nymphs. Treatment of M. persicae with LCT resulted in oxidative stress and significantly increased H2O2 and malondialdehyde levels. This led to an elevated transcription level of MpHsp70. Injection of H2O2 into M. persicae also upregulated the MpHsp70 expression level, suggesting that MpHsp70 is responsive to ROS, particularly H2O2, induced by LCT. Recombinant MpHSP70 protein was expressed in Escherichia coli. E. coli cells overexpressing MpHSP70 exhibited significant tolerance to H2O2 and the ROS generators, cumene hydroperoxide and paraquat. This indicated that MpHSP70 protects against oxidative stress. Furthermore, knockdown of MpHsp70 by RNA interference resulted in increased susceptibility in apterous adults of M. persicae to LCT. These findings indicate that MpHsp70 plays an important role in defense against LCT-induced oxidative stress and insecticide susceptibility in M. persicae.
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Affiliation(s)
- Bao Dong
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Xi-Ya Liu
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Bin Li
- Department of Science and Technology, Sichuan Provincial Branch of China National Tobacco Corporation, Chengdu 610041, China.
| | - Mao-Ye Li
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Shi-Guang Li
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Su Liu
- Anhui Provincial Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
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Zhong Z, Wang X, Yin X, Tian J, Komatsu S. Morphophysiological and Proteomic Responses on Plants of Irradiation with Electromagnetic Waves. Int J Mol Sci 2021; 22:12239. [PMID: 34830127 PMCID: PMC8618018 DOI: 10.3390/ijms222212239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/01/2021] [Accepted: 11/09/2021] [Indexed: 01/25/2023] Open
Abstract
Electromagnetic energy is the backbone of wireless communication systems, and its progressive use has resulted in impacts on a wide range of biological systems. The consequences of electromagnetic energy absorption on plants are insufficiently addressed. In the agricultural area, electromagnetic-wave irradiation has been used to develop crop varieties, manage insect pests, monitor fertilizer efficiency, and preserve agricultural produce. According to different frequencies and wavelengths, electromagnetic waves are typically divided into eight spectral bands, including audio waves, radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. In this review, among these electromagnetic waves, effects of millimeter waves, ultraviolet, and gamma rays on plants are outlined, and their response mechanisms in plants through proteomic approaches are summarized. Furthermore, remarkable advancements of irradiating plants with electromagnetic waves, especially ultraviolet, are addressed, which shed light on future research in the electromagnetic field.
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Affiliation(s)
- Zhuoheng Zhong
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, China; (Z.Z.); (J.T.)
| | - Xin Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;
| | - Xiaojian Yin
- Department of Pharmacognosy, China Pharmaceutical University, Nanjing 211198, China;
| | - Jingkui Tian
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, China; (Z.Z.); (J.T.)
| | - Setsuko Komatsu
- Faculty of Environmental and Information Sciences, Fukui University of Technology, Fukui 910-8505, Japan
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Zhou C, Yang XB, Yang H, Gong MF, Long GY, Jin DC. Role of SfJHAMT and SfFAMeT in the reproductive regulation of Sogatella furcifera and its expression under insecticide stress. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 173:104779. [PMID: 33771258 DOI: 10.1016/j.pestbp.2021.104779] [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: 11/02/2020] [Revised: 01/07/2021] [Accepted: 01/11/2021] [Indexed: 06/12/2023]
Abstract
The isoprene branching pathway is a unique downstream synthesis pathway of juvenile hormone (JH) in arthropods, which plays an important role in the growth, development, and reproduction of insects. Juvenile hormone acid O-methyltransferase (JHAMT) and farnesoic acid O-methyltransferase (FAMeT) are two key proteins that are regulated in the isoprene branching pathway. Based on the available transcriptomic and genomic data of Sogatella furcifera, full-length cDNAs of SfJHAMT and SfFAMeT were identified. In vitro injection of dsRNA targeted to silence SfJHAMT and SfFAMeT inhibited the fecundity, ovarian development, and transcription levels of SfKr-h1 and SfVg significantly. Of note, The transcription levels of SfJHAMT and SfFAMeT are regulated mutually; i.e., silencing of SfJHAMT causes an increase in the SfFAMeT transcription level and vice versa, and the negative effect of simultaneous silencing on reproduction is greater. The results revealed a coordinated effect of SfJHAMT and SfFAMeT on the reproductive capabilities of S. furcifera. Furthermore, a JH analog (methoprene) partially rescued the negative effect of simultaneous silencing by SfJHAMT and SfFAMeT on reproduction. In addition, the expression profile analysis after insecticide stress showed that triazophos (LC25) can induce the transcription of SfMet and SfKr-h1 to promote JH signal transduction, which affects the transcription of SfVg and ultimately promotes the reproduction of S. furcifera. The results of the present study lay a foundation to further explain the isoprene branch pathway function in insect reproduction and can open up new avenues for sustainable pest control while expanding the current understanding of molecular mechanisms through which insecticides stimulate reproduction and lead to pest resurgence.
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Affiliation(s)
- Cao Zhou
- Institute of Entomology, Guizhou University, Guiyang, China; College of Life Science, Chongqing Normal University, Chongqing, China
| | - Xi-Bin Yang
- Institute of Entomology, Guizhou University, Guiyang, China; Scientific Observing and Experimental Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs of the People's Republic of China, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Guiyang, China
| | - Hong Yang
- Institute of Entomology, Guizhou University, Guiyang, China; College of Tobacco Science, Guizhou University, Guiyang, China; Scientific Observing and Experimental Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs of the People's Republic of China, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Guiyang, China.
| | - Ming-Fu Gong
- Institute of Entomology, Guizhou University, Guiyang, China; Scientific Observing and Experimental Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs of the People's Republic of China, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Guiyang, China
| | - Gui-Yun Long
- Institute of Entomology, Guizhou University, Guiyang, China; Scientific Observing and Experimental Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs of the People's Republic of China, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Guiyang, China
| | - Dao-Chao Jin
- Institute of Entomology, Guizhou University, Guiyang, China; Scientific Observing and Experimental Station of Crop Pests in Guiyang, Ministry of Agriculture and Rural Affairs of the People's Republic of China, China; Guizhou Provincial Key Laboratory for Agricultural Pest Management of Mountainous Regions, Guiyang, China
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