1
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Ahmad S, Jamil M, Jaworski CC, Wu Y, Palma-Onetto V, Lyu B, Luo Y. Knockdown of the ecdysone receptor disrupts development and causes mortality in the melon fly, Zeugodacus cucurbitae. INSECT MOLECULAR BIOLOGY 2023; 32:738-747. [PMID: 37646607 DOI: 10.1111/imb.12867] [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] [Accepted: 08/11/2023] [Indexed: 09/01/2023]
Abstract
Cucurbits are important economic plants that are attacked by numerous pests, among which the melon fly Zeugodacus cucurbitae is extremely problematic. New sustainable pest control strategies are necessary to replace chemical insecticides that are harmful to the environment, human health and nontarget species. The RNA interference (RNAi) technology is one of the most promising tools due to high efficiency and species specificity. We developed an RNAi strategy targeting the ecdysone receptor (ECR) of Z. cucurbitae, which plays an important role in moulting and reproduction. We identified, described and isolated the ECR gene of Z. cucurbitae and measured its expression pattern across developmental stages and tissues. ZcECR knockdown via dsZcECR ingestion caused a significant larval mortality and abnormal phenotypes in pupae and adults. About 68% of larvae fed with a dsZcECR-treated diet failed to enter the pupal stage and died. In addition, ZcECR knockdown dramatically reduced pupal weight (by 3.24 mg on average) and fecundity (by about 23%). RNAi targeting the ECR gene is therefore a promising method to control Z. cucurbitae, paving the way for the development of novel sustainable and highly specific control strategies.
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Affiliation(s)
- Shakil Ahmad
- School of Plant Protection, Department of Pesticide Science, Hainan University, Haikou, Hainan, China
| | - Momana Jamil
- School of Plant Protection, Department of Pesticide Science, Hainan University, Haikou, Hainan, China
| | | | - Yuejie Wu
- School of Plant Protection, Department of Pesticide Science, Hainan University, Haikou, Hainan, China
| | - Valeria Palma-Onetto
- Departamento de Química Ambiental, Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile
| | - Baoqian Lyu
- Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou, China
| | - Yanping Luo
- School of Plant Protection, Department of Pesticide Science, Hainan University, Haikou, Hainan, China
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2
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Rozo-Lopez P, Parker BJ. Why do viruses make aphids winged? INSECT MOLECULAR BIOLOGY 2023; 32:575-582. [PMID: 37243432 DOI: 10.1111/imb.12860] [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: 01/04/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023]
Abstract
Aphids are hosts to diverse viruses and are important vectors of plant pathogens. The spread of viruses is heavily influenced by aphid movement and behaviour. Consequently, wing plasticity (where individuals can be winged or wingless depending on environmental conditions) is an important factor in the spread of aphid-associated viruses. We review several fascinating systems where aphid-vectored plant viruses interact with aphid wing plasticity, both indirectly by manipulating plant physiology and directly through molecular interactions with plasticity pathways. We also cover recent examples where aphid-specific viruses and endogenous viral elements within aphid genomes influence wing formation. We discuss why unrelated viruses with different transmission modes have convergently evolved to manipulate wing formation in aphids and whether this is advantageous for both host and virus. We argue that interactions with viruses are likely shaping the evolution of wing plasticity within and across aphid species, and we discuss the potential importance of these findings for aphid biocontrol.
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Affiliation(s)
- Paula Rozo-Lopez
- Department of Microbiology, University of Tennessee, Knoxville, Tennessee, USA
| | - Benjamin J Parker
- Department of Microbiology, University of Tennessee, Knoxville, Tennessee, USA
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3
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Shangguan C, Kuang Y, Gao L, Zhu B, Chen XD, Yu X. Antennae-enriched expression of candidate odorant degrading enzyme genes in the turnip aphid, Lipaphis erysimi. Front Physiol 2023; 14:1228570. [PMID: 37476684 PMCID: PMC10354451 DOI: 10.3389/fphys.2023.1228570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 06/27/2023] [Indexed: 07/22/2023] Open
Abstract
Aphids heavily rely on their olfactory system for foraging behavior. Odorant-degrading enzymes (ODEs) are essential in preserving the olfactory acuity of aphids by removing redundant odorants in the antennae. Certain enzymes within this group stand out as being enriched and/or biased expressed in the antennae, such as carboxylesterases (CXEs), cytochrome P450 (CYPs), glutathione S-transferases (GSTs), and UDP-glycosyltransferases (UGTs). Here, we performed a comparative transcriptome analysis of antennae and body tissue to isolate the antennal ODE genes of turnip aphid Lipaphis erysimi. A dataset of one CXE, seven CYPs, two GSTs, and five UGTs enriched in the antennae was identified and subjected to sequence analysis. Furthermore, qRT-PCR analyses showed that 13 ODE genes (LeCXE6, LeCYP4c1, LeCYP6a2, LeCYP6a13, LeCYP6a14.2, LeCYP6k1, LeCYP18a1, LeGST1, LeUGT1-7, LeUGT2B7, LeUGT2B13, LeUGT2C1.1, and LeUGT2C1.2) were specifically or significantly elevated in antennal tissues. Among these antennae-enriched ODEs, LeCYP4c1, LeCYP6a2, LeCYP6a13, LeCYP6a14.2, LeCYP18a1, LeUGT2B7, and LeUGT2B13 were found to exhibit significantly higher expression levels in alate aphids compared to apterous and nymph aphids, suggesting their putative role in detecting new host plant location. The results presented in this study highlight the identification and expression of ODE genes in L. erysimi, paving the path to investigate their functional role in odorant degradation during the olfactory processes.
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Affiliation(s)
- Chaozhi Shangguan
- Ganzhou Key Laboratory of Nanling Insect Biology/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Yinhui Kuang
- Ganzhou Key Laboratory of Nanling Insect Biology/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Liwei Gao
- Ganzhou Key Laboratory of Nanling Insect Biology/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Bo Zhu
- Ganzhou Key Laboratory of Nanling Insect Biology/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Xue Dong Chen
- Entomology and Nematology Department, University of Florida, Gainesville, FL, United States
| | - Xiudao Yu
- Ganzhou Key Laboratory of Nanling Insect Biology/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
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4
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Kuang Y, Shangguan C, Yuan S, Zhang Q, Qiu Z, Gao L, Yu X. Candidate odorant-binding protein and chemosensory protein genes in the turnip aphid Lipaphis erysimi. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2023:e22022. [PMID: 37154128 DOI: 10.1002/arch.22022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/19/2023] [Accepted: 04/24/2023] [Indexed: 05/10/2023]
Abstract
The turnip aphid, Lipaphis erysimi Kaltenbach, inflicts heavy damage on cruciferous crops worldwide. In these insects, olfactory perception is crucial for mating, host location, and oviposition. Both odorant-binding proteins (OBPs) and chemosensory proteins (CSPs) are responsible for the delivery of host odorants and pheromones during initial molecular interactions. In this study, antennal and body transcriptomes of L. erysimi were generated through the deep sequencing of RNA libraries. A dataset of 11 LeryOBP and four LeryCSP transcripts was identified among assembled unigenes and subjected to sequence analysis. Phylogenetic analysis found a one-to-one orthologous relationship between LeryOBP/LeryCSP and its corresponding homologs from other aphid species. Further quantitative real-time PCR analyses across developmental stages and tissues showed that five LeryOBP genes (i.e., LeryGOBP, LeryOBP6, LeryOBP7, LeryOBP9, and LeryOBP13) and LeryCSP10 were specifically or significantly elevated in the antennae compared with other tissues. Moreover, two transcripts (i.e., LeryGOBP and LeryOBP6) exhibited remarkably higher expression levels in alate aphids, implying their potentially functional role in the perception of new host plant locations. These results present the identification and expression of OBP/CSP genes in L. erysimi, providing valuable insights into their putative role in olfactory signal transduction.
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Affiliation(s)
- Yinhui Kuang
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Chaozhi Shangguan
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Sichen Yuan
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Qiaoqin Zhang
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Ziying Qiu
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Liwei Gao
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
| | - Xiudao Yu
- Ganzhou Key Laboratory of Nanling Insect Biology/Ganzhou Key Laboratory of Greenhouse Vegetables/National Navel Orange Engineering Research Center, College of Life Sciences, Gannan Normal University, Ganzhou, Jiangxi, China
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5
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Zhang J, Li H, Zhong X, Tian J, Segers A, Xia L, Francis F. Silencing an aphid-specific gene SmDSR33 for aphid control through plant-mediated RNAi in wheat. FRONTIERS IN PLANT SCIENCE 2023; 13:1100394. [PMID: 36699834 PMCID: PMC9868936 DOI: 10.3389/fpls.2022.1100394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Grain aphid (Sitobion miscanthi) is one of the most dominant and devastating insect pests in wheat, which causes substantial losses to wheat production each year. Engineering transgenic plants expressing double strand RNA (dsRNA) targeting an insect-specific gene has been demonstrated to provide an alternative environmentally friendly strategy for aphid management through plant-mediated RNA interference (RNAi). Here we identified and characterized a novel potential RNAi target gene (SmDSR33) which was a gene encoding a putative salivary protein. We then generated stable transgenic wheat lines expressing dsRNA for targeted silencing of SmDSR33 in grain aphids through plant-mediated RNAi. After feeding on transgenic wheat plants expressing SmDSR33-dsRNA, the attenuated expression levels of SmDSR33 in aphids were observed when compared to aphids feeding on wild-type plants. The decreased SmDSR33 expression levels thus resulted in significantly reduced fecundity and survival, and decreased reproduction of aphids. We also observed altered aphid feeding behaviors such as longer duration of intercellular stylet pathway and shorter duration of passive ingestion in electroneurography assays. Furthermore, both the surviving aphids and their offspring exhibited decreased survival rates and fecundity, indicating that the silencing effect could be persistent and transgenerational in grain aphids. The results demonstrated that SmDSR33 can be selected as an effective RNAi target for wheat aphid control. Silencing of an essential salivary protein gene involved in ingestion through plant-mediated RNAi could be exploited as an effective strategy for aphid control in wheat.
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Affiliation(s)
- Jiahui Zhang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Huiyuan Li
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Xue Zhong
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Jinfu Tian
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Arnaud Segers
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
| | - Lanqin Xia
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
- National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed Laboratory, Sanya, Hainan, China
| | - Frédéric Francis
- Functional and Evolutionary Entomology, Gembloux Agro-Bio Tech, University of Liege, Gembloux, Belgium
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6
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Sun X, Sun Y, Ma L, Liu Z, Wang Q, Wang D, Zhang C, Yu H, Xu M, Ding J, Siemann E. Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change. Commun Biol 2022; 5:761. [PMID: 35902771 PMCID: PMC9334390 DOI: 10.1038/s42003-022-03731-z] [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: 11/29/2021] [Accepted: 07/15/2022] [Indexed: 11/09/2022] Open
Abstract
Temperature has a large influence on insect abundances, thus under climate change, identifying major drivers affecting pest insect populations is critical to world food security and agricultural ecosystem health. Here, we conducted a meta-analysis with data obtained from 120 studies across China and Europe from 1970 to 2017 to reveal how climate and agricultural practices affect populations of wheat aphids. Here we showed that aphid loads on wheat had distinct patterns between these two regions, with a significant increase in China but a decrease in Europe over this time period. Although temperature increased over this period in both regions, we found no evidence showing climate warming affected aphid loads. Rather, differences in pesticide use, fertilization, land use, and natural enemies between China and Europe may be key factors accounting for differences in aphid pest populations. These long-term data suggest that agricultural practices impact wheat aphid loads more than climate warming.
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Affiliation(s)
- Xiao Sun
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Yumei Sun
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Ling Ma
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Zhen Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Qiyun Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Dingli Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Chujun Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Hongwei Yu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Ming Xu
- Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions (Henan University), Ministry of Education, Kaifeng, 475004, China.,The College of Geography and Environmental Science, Henan University, Kaifeng, 475004, China
| | - Jianqing Ding
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, China.
| | - Evan Siemann
- Department of Biosciences, Rice University, Houston, TX, 77005, USA
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7
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RNAi technology for plant protection and its application in wheat. ABIOTECH 2021; 2:365-374. [PMID: 36304420 PMCID: PMC9590511 DOI: 10.1007/s42994-021-00036-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/23/2021] [Indexed: 12/25/2022]
Abstract
The RNAi technology takes advantage of the intrinsic RNA interference (RNAi) mechanism that exists in nearly all eukaryotes in which target mRNAs are degraded or functionally suppressed. Significant progress has been made in recent years where RNAi technology is applied to several crops and economic plants for protection against diseases like fungi, pests, and nematode. RNAi technology is also applied in controlling pathogen damages in wheat, one of the most important crops in the world. In this review, we first give a brief introduction of the RNAi technology and the underneath mechanism. We then review the recent progress of its utilization in crops, particular wheat. Finally, we discuss the existing challenges and prospect future development of this technology in crop protection.
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8
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Zhan Y, Zhao L, Zhao X, Liu J, Francis F, Liu Y. Terpene Synthase Gene OtLIS Confers Wheat Resistance to Sitobion avenae by Regulating Linalool Emission. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:13734-13743. [PMID: 34779195 DOI: 10.1021/acs.jafc.1c05978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Sitobion avenae (Fabricius) is a major insect pest of wheat worldwide that reduces crop yield and quality annually. Few germplasm resources with resistant genes to aphids have been identified and characterized. Here, octoploid Trititrigia, a species used in wheat distant hybridization breeding, was found to be repellent to S. avenae after 2 year field investigations and associated with physiological and behavioral assays. Linalool monoterpene was identified to accumulate dominantly in plants in response to S. avenae infestation. We cloned the resistance gene OtLIS by assembling the transcriptome of aphid-infested or healthy octoploid Trititrigia. Functional characterization analysis indicated that OtLIS encoded a terpene synthase and conferred resistance to S. avenae by linalool emission before and after aphid feeding. Our study suggests that the octoploid Trititrigia with the aphid-resistant gene OtLIS may have potential as a target resource for further breeding aphid-resistant wheat cultivars.
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Affiliation(s)
- Yidi Zhan
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
| | - Lei Zhao
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
| | - Xiaojing Zhao
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
| | - Jiahui Liu
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
- Functional and Evolutionary Entomology, Terra, Gembloux Agro-Bio Tech, Liege University, Passage des Deportes 2, 5030 Gembloux, Belgium
| | - Frederic Francis
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
- Functional and Evolutionary Entomology, Terra, Gembloux Agro-Bio Tech, Liege University, Passage des Deportes 2, 5030 Gembloux, Belgium
| | - Yong Liu
- College of Plant Protection, Shandong Agricultural University, No. 61, Daizong Road, Taian, Shandong 271018, China
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Li S, Zhang C, Li J, Yan L, Wang N, Xia L. Present and future prospects for wheat improvement through genome editing and advanced technologies. PLANT COMMUNICATIONS 2021; 2:100211. [PMID: 34327324 PMCID: PMC8299080 DOI: 10.1016/j.xplc.2021.100211] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/15/2021] [Accepted: 06/03/2021] [Indexed: 05/03/2023]
Abstract
Wheat (Triticum aestivum, 2n = 6x = 42, AABBDD) is one of the most important staple food crops in the world. Despite the fact that wheat production has significantly increased over the past decades, future wheat production will face unprecedented challenges from global climate change, increasing world population, and water shortages in arid and semi-arid lands. Furthermore, excessive applications of diverse fertilizers and pesticides are exacerbating environmental pollution and ecological deterioration. To ensure global food and ecosystem security, it is essential to enhance the resilience of wheat production while minimizing environmental pollution through the use of cutting-edge technologies. However, the hexaploid genome and gene redundancy complicate advances in genetic research and precision gene modifications for wheat improvement, thus impeding the breeding of elite wheat cultivars. In this review, we first introduce state-of-the-art genome-editing technologies in crop plants, especially wheat, for both functional genomics and genetic improvement. We then outline applications of other technologies, such as GWAS, high-throughput genotyping and phenotyping, speed breeding, and synthetic biology, in wheat. Finally, we discuss existing challenges in wheat genome editing and future prospects for precision gene modifications using advanced genome-editing technologies. We conclude that the combination of genome editing and other molecular breeding strategies will greatly facilitate genetic improvement of wheat for sustainable global production.
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Affiliation(s)
- Shaoya Li
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Chen Zhang
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Jingying Li
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Lei Yan
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Ning Wang
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
| | - Lanqin Xia
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
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10
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Wang G, Gou Y, Guo S, Zhou JJ, Liu C. RNA interference of trehalose-6-phosphate synthase and trehalase genes regulates chitin metabolism in two color morphs of Acyrthosiphon pisum Harris. Sci Rep 2021; 11:948. [PMID: 33441844 PMCID: PMC7806880 DOI: 10.1038/s41598-020-80277-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 12/18/2020] [Indexed: 01/29/2023] Open
Abstract
Trehalose-6-phosphate synthase (TPS) and trehalase (TRE) directly regulate trehalose metabolism and indirectly regulate chitin metabolism in insects. Real-time quantitative PCR (RT-qPCR) and RNA interference (RNAi) were used to detect the expressions and functions of the ApTPS and ApTRE genes. Abnormal phenotypes were found after RNAi of ApTRE in the Acyrthosiphon pisum. The molting deformities were observed in two color morphs, while wing deformities were only observed in the red morphs. The RNAi of ApTPS significantly down-regulated the expression of chitin metabolism-related genes, UDP-N-acetyglucosamine pyrophosphorylase (ApUAP), chitin synthase 2 (Apchs-2), Chitinase 2, 5 (ApCht2, 5), endo-beta-N-acetylglucosaminidase (ApENGase) and chitin deacetylase (ApCDA) genes at 24 h and 48 h; The RNAi of ApTRE significantly down-regulated the expression of ApUAP, ApCht1, 2, 8 and ApCDA at 24 h and 48 h, and up-regulated the expression of glucose-6-phosphate isomerase (ApGPI) and Knickkopf protein (ApKNK) genes at 48 h. The RNAi of ApTRE and ApTPS not only altered the expression of chitin metabolism-related genes but also decreased the content of chitin. These results demonstrated that ApTPS and ApTRE can regulate the chitin metabolism, deepen our understanding of the biological functions, and provide a foundation for better understanding the molecular mechanism of insect metamorphosis.
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Affiliation(s)
- Guang Wang
- grid.411734.40000 0004 1798 5176College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070 Gansu China ,Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou, 730070 Gansu China
| | - Yuping Gou
- grid.411734.40000 0004 1798 5176College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070 Gansu China ,Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou, 730070 Gansu China
| | - Sufan Guo
- grid.411734.40000 0004 1798 5176College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070 Gansu China ,Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou, 730070 Gansu China
| | - Jing-Jiang Zhou
- grid.411734.40000 0004 1798 5176College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070 Gansu China ,Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou, 730070 Gansu China
| | - Changzhong Liu
- grid.411734.40000 0004 1798 5176College of Plant Protection, Gansu Agricultural University, Lanzhou, 730070 Gansu China ,Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, Lanzhou, 730070 Gansu China
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11
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Expression of Pinellia ternata leaf agglutinin under rolC promoter confers resistance against a phytophagous sap sucking aphid, Myzus persicae. ELECTRON J BIOTECHN 2020. [DOI: 10.1016/j.ejbt.2020.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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12
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Wang C, Tian B, Yu Z, Ding J. Effect of Different Combinations of Phosphorus and Nitrogen Fertilization on Arbuscular Mycorrhizal Fungi and Aphids in Wheat. INSECTS 2020; 11:E365. [PMID: 32545401 PMCID: PMC7349843 DOI: 10.3390/insects11060365] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/04/2020] [Accepted: 06/09/2020] [Indexed: 11/17/2022]
Abstract
While chemical fertilizers can be used to increase crop yield, the abuse of fertilizers aggravates environmental pollution and soil degradation. Understanding the effects of chemical fertilizers on the interaction between arbuscular mycorrhizal fungi (AMF) and pest insects is of great benefit to crop and environmental protection, because AMF can enhance the nutrition absorption and insect resistance of crops. This study tested the effect of different levels of phosphorus, nitrogen, and their interactions on AMF, secondary metabolites, Sitobion avenae in garden, as well as the wheat traits in field. The results showed that AMF colonization on roots in the P0N1 treatment (0 g P/pot, 1.3083 g N/pot in the garden, and 0 g P/plot, 299.84 g N/plot) was the highest in both the garden and the field. The abundance of aphid was reduced in the P0N1 treatment, and there were negative relationships between aphids and AMF and phenolics, but a positive relationship between AMF and phenolics. Our results indicated that a change in the ratio of phosphorus to nitrogen affects the relationship among AMF, aphid abundance, and metabolites. The results also suggested an approach to save chemical fertilizers that could improve crop health and protect the agroecosystem against pollution at the same time.
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Affiliation(s)
- Chao Wang
- School of Life Sciences, Henan University, Jin Ming Avenue, Kaifeng 475004, Henan, China; (C.W.); (Z.Y.)
- State Key Laboratory of Crop Stress Adaptation and Improvement, Jin Ming Avenue, Kaifeng 475004, Henan, China
| | - Baoliang Tian
- School of Life Sciences, Henan University, Jin Ming Avenue, Kaifeng 475004, Henan, China; (C.W.); (Z.Y.)
- State Key Laboratory of Crop Stress Adaptation and Improvement, Jin Ming Avenue, Kaifeng 475004, Henan, China
| | - Zhenzhen Yu
- School of Life Sciences, Henan University, Jin Ming Avenue, Kaifeng 475004, Henan, China; (C.W.); (Z.Y.)
- State Key Laboratory of Crop Stress Adaptation and Improvement, Jin Ming Avenue, Kaifeng 475004, Henan, China
| | - Jianqing Ding
- School of Life Sciences, Henan University, Jin Ming Avenue, Kaifeng 475004, Henan, China; (C.W.); (Z.Y.)
- State Key Laboratory of Crop Stress Adaptation and Improvement, Jin Ming Avenue, Kaifeng 475004, Henan, China
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13
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Sun Y, Sparks C, Jones H, Riley M, Francis F, Du W, Xia L. Silencing an essential gene involved in infestation and digestion in grain aphid through plant-mediated RNA interference generates aphid-resistant wheat plants. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:852-854. [PMID: 30582665 PMCID: PMC6471730 DOI: 10.1111/pbi.13067] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/03/2018] [Accepted: 12/20/2018] [Indexed: 05/08/2023]
Affiliation(s)
- Yongwei Sun
- Institute of Crop SciencesChinese Academy of Agricultural Sciences (CAAS)BeijingChina
- Functional and Evolutionary EntomologyGembloux Agro‐bio TechUniversity of Liege (ULg)GemblouxBelgium
| | | | - Huw Jones
- Institute of Biological, Environmental & Rural Sciences (IBERS)Aberystwyth UniversityAberystwythUK
| | | | - Frédéric Francis
- Functional and Evolutionary EntomologyGembloux Agro‐bio TechUniversity of Liege (ULg)GemblouxBelgium
| | - Wenming Du
- Institute of Crop SciencesChinese Academy of Agricultural Sciences (CAAS)BeijingChina
| | - Lanqin Xia
- Institute of Crop SciencesChinese Academy of Agricultural Sciences (CAAS)BeijingChina
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14
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Yu X, Jia D, Duan P. Plasmid engineering of aphid alarm pheromone in tobacco seedlings affects the preference of aphids. PLANT SIGNALING & BEHAVIOR 2019; 14:e1588669. [PMID: 30849285 PMCID: PMC6512937 DOI: 10.1080/15592324.2019.1588669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 02/22/2019] [Indexed: 06/09/2023]
Abstract
Plants producing sufficient amount of aphid alarm pheromone by expressing (E)-β-Farnesene (EβF) synthase gene may contribute to plant protection by reducing aphid populations. However, terpene biosynthesis varies among plant species and developmental stages. In the present study, volatile headspace analysis of tobacco seedlings with MaβFS1 (an EβF synthase from the Asian peppermint Mentha asiatica) failed to generate EβF. We further targeted MaβFS1 to the tobacco plastid, using a chloroplast targeting sequence, either with or without the AtFPS1 gene for the biosynthesis of the precursor farnesyl diphosphate. When both MaβFS1 and AtFPS1 genes were targeted to the chloroplast, low levels of EβF were detected in stably transformed tobacco seedlings; resulting in specific repellence of the green peach aphid, Myzus persicae. These data indicate that redirecting the EβF biosynthetic pathway from its natural cytosolic location to the chloroplast is a valid strategy. This redirecting strategy may be very useful for other crop plants that do not naturally produce EβF or other repellent volatiles.
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Affiliation(s)
- Xiudao Yu
- School of Agricultural Engineering/Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project, Nanyang Normal University, Nanyang, Henan, China
| | - Dianyong Jia
- School of Agricultural Engineering/Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project, Nanyang Normal University, Nanyang, Henan, China
| | - Pengfei Duan
- School of Agricultural Engineering/Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project, Nanyang Normal University, Nanyang, Henan, China
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15
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Cooper AM, Silver K, Zhang J, Park Y, Zhu KY. Molecular mechanisms influencing efficiency of RNA interference in insects. PEST MANAGEMENT SCIENCE 2019; 75:18-28. [PMID: 29931761 DOI: 10.1002/ps.5126] [Citation(s) in RCA: 173] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 05/21/2023]
Abstract
RNA interference (RNAi) is an endogenous, sequence-specific gene-silencing mechanism elicited by small RNA molecules. RNAi is a powerful reverse genetic tool, and is currently being utilized for managing insects and viruses. Widespread implementation of RNAi-based pest management strategies is currently hindered by inefficient and highly variable results when different insect species, strains, developmental stages, tissues, and genes are targeted. Mechanistic studies have shown that double-stranded ribonucleases (dsRNases), endosomal entrapment, deficient function of the core machinery, and inadequate immune stimulation contribute to limited RNAi efficiency. However, a comprehensive understanding of the molecular mechanisms limiting RNAi efficiency remains elusive. Recent advances in dsRNA stability in physiological tissues, dsRNA internalization into cells, the composition and function of the core RNAi machinery, as well as small-interfering RNA/double-stranded RNA amplification and spreading mechanisms are reviewed to establish a global understanding of the obstacles impeding wider understanding of RNAi mechanisms in insects. © 2018 Society of Chemical Industry.
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Affiliation(s)
| | - Kristopher Silver
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Jianzhen Zhang
- Department of Entomology, Kansas State University, Manhattan, KS, USA
- Institute of Applied Biology, Shanxi University, Taiyuan, China
| | - Yoonseong Park
- Department of Entomology, Kansas State University, Manhattan, KS, USA
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS, USA
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16
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Zhao Y, Sui X, Xu L, Liu G, Lu L, You M, Xie C, Li B, Ni Z, Liang R. Plant-mediated RNAi of grain aphid CHS1 gene confers common wheat resistance against aphids. PEST MANAGEMENT SCIENCE 2018; 74:2754-2760. [PMID: 29737050 DOI: 10.1002/ps.5062] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 04/29/2018] [Accepted: 04/30/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Chitin is an important component of the insect exoskeleton and peritrophic membrane. Chitin synthase 1 (CHS1) is a key enzyme in the chitin synthesis pathway, and has a role in insect molting and growth. Plant-mediated RNA interference (RNAi) has been used as a more target-specific and environmentally safe approach to prevent and control agricultural insects. The aims of this study were to use grain aphid (Sitobion avanae) CHS1 as the target gene and to produce transgenic wheat lines for aphid control via plant-mediated RNAi. RESULTS Expression levels of CHS1 changed at different developmental stages. After feeding on the representative T3 transgenic lines Tb5-2 and Tb10-3, CHS1 expression levels in grain aphid decreased by 50.29% and 45.32%, respectively; and total and molting aphid numbers reduced significantly, compared with controls. Consistent with this, aphid numbers in mixed natural populations reduced significantly in the respective T4 and T5 transgenic lines under field conditions, and T5 transgenic lines had higher grain weight compared with the unsprayed insecticide wild-type and insecticide-sprayed wild-type. CONCLUSION These results indicate that plant-mediated RNAi of the grain aphid CHS1 gene confers common wheat resistance against aphids. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Yanjie Zhao
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Xiaoyan Sui
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Lanjie Xu
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Guoyu Liu
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Lihua Lu
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Mingshan You
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Chaojie Xie
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Baoyun Li
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Zhongfu Ni
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Rongqi Liang
- Key Laboratory of Crop Heterosis and Utilization (MOE)/Beijing Key Laboratory of Crop Genetic Improvement, College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
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17
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Hu H, Li J, Delatte T, Vervoort J, Gao L, Verstappen F, Xiong W, Gan J, Jongsma MA, Wang C. Modification of chrysanthemum odour and taste with chrysanthemol synthase induces strong dual resistance against cotton aphids. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:1434-1445. [PMID: 29331089 PMCID: PMC6041446 DOI: 10.1111/pbi.12885] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 12/20/2017] [Accepted: 01/08/2018] [Indexed: 05/21/2023]
Abstract
Aphids are pests of chrysanthemum that employ plant volatiles to select host plants and ingest cell contents to probe host quality before engaging in prolonged feeding and reproduction. Changes in volatile and nonvolatile metabolite profiles can disrupt aphid-plant interactions and provide new methods of pest control. Chrysanthemol synthase (CHS) from Tanacetum cinerariifolium represents the first committed step in the biosynthesis of pyrethrin ester insecticides, but no biological role for the chrysanthemol product alone has yet been documented. In this study, the TcCHS gene was over-expressed in Chrysanthemum morifolium and resulted in both the emission of volatile chrysanthemol (ca. 47 pmol/h/gFW) and accumulation of a chrysanthemol glycoside derivative, identified by NMR as chrysanthemyl-6-O-malonyl-β-D-glucopyranoside (ca. 1.1 mM), with no detrimental phenotypic effects. Dual-choice assays separately assaying these compounds in pure form and as part of the headspace and extract demonstrated independent bioactivity of both components against the cotton aphid (Aphis gossypii). Performance assays showed that the TcCHS plants significantly reduced aphid reproduction, consistent with disturbance of aphid probing activities on these plants as revealed by electropenetrogram (EPG) studies. In open-field trials, aphid population development was very strongly impaired demonstrating the robustness and high impact of the trait. The results suggest that expression of the TcCHS gene induces a dual defence system, with both repellence by chrysanthemol odour and deterrence by its nonvolatile glycoside, introducing a promising new option for engineering aphid control into plants.
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Affiliation(s)
- Hao Hu
- Key Laboratory of Horticultural Plant BiologyMOE Huazhong Agricultural UniversityWuhanChina
- BU BioscienceWageningen University and ResearchWageningenThe Netherlands
| | - Jinjin Li
- Key Laboratory of Horticultural Plant BiologyMOE Huazhong Agricultural UniversityWuhanChina
| | - Thierry Delatte
- Laboratory of Plant PhysiologyWageningen University and ResearchWageningenThe Netherlands
| | - Jacques Vervoort
- Laboratory of BiochemistryWageningen University and ResearchWageningenThe Netherlands
| | - Liping Gao
- Key Laboratory of Horticultural Plant BiologyMOE Huazhong Agricultural UniversityWuhanChina
- BU BioscienceWageningen University and ResearchWageningenThe Netherlands
| | - Francel Verstappen
- Laboratory of Plant PhysiologyWageningen University and ResearchWageningenThe Netherlands
| | - Wei Xiong
- Key Laboratory of Horticultural Plant BiologyMOE Huazhong Agricultural UniversityWuhanChina
| | - Jianping Gan
- Hubei Collaborative Innovation Center of Dabie MountainsHuanggang Normal UniversityHuanggangChina
| | - Maarten A. Jongsma
- BU BioscienceWageningen University and ResearchWageningenThe Netherlands
| | - Caiyun Wang
- Key Laboratory of Horticultural Plant BiologyMOE Huazhong Agricultural UniversityWuhanChina
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18
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Yu X, Killiny N. RNA interference of two glutathione S-transferase genes, Diaphorina citri DcGSTe2 and DcGSTd1, increases the susceptibility of Asian citrus psyllid (Hemiptera: Liviidae) to the pesticides fenpropathrin and thiamethoxam. PEST MANAGEMENT SCIENCE 2018; 74:638-647. [PMID: 28971568 DOI: 10.1002/ps.4747] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 07/28/2017] [Accepted: 09/25/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The Asian citrus psyllid, Diaphorina citri Kuwayama, is an important agricultural pest of citrus globally. Foliar application of chemical insecticides is the most widely used option for reducing D. citri populations. Knockdown of glutathione S-transferase (GST) in several insect species leads to increased susceptibility to insecticides; however, information about the detoxifying role of GST genes in D. citri is unavailable. RESULTS Via a sequence homology search, we isolated and characterized three DcGST genes (DcGSTd1, DcGSTe1 and DcGSTe2) from D. citri. Phylogenetic analysis grouped DcGSTd1 into the delta class of GST genes, whereas DcGSTe1 and DcGSTe2 were clustered in the epsilon clade. Gene expression analysis revealed that chlorpyrifos treatment increased the mRNA levels of DcGSTe1 and fenpropathrin enhanced the expression level of DcGSTd1, while DcGSTe2 was significantly up-regulated after exposure to thiamethoxam at a dose of 30% lethal concentration (LC30). RNA interference (RNAi) of DcGSTe2 and DcGSTd1 followed by an insecticide bioassay increased the mortalities of thiamethoxam-treated psyllids by 23.0% and fenpropathrin-treated psyllids by 15.0%. In contrast, knockdown of DcGSTe1 did not significantly increase the susceptibility of D. citri to any of these three insecticides. Further, feeding with double-stranded RNA (dsDcGSTe2-d1) interfusion co-silenced DcGSTe2 and DcGSTd1 expression in D. citri, and led to an increase of susceptibility to both fenpropathrin and thiamethoxam. CONCLUSION The findings suggest that DcGSTe2 and DcGSTd1 play unique roles in detoxification of the pesticides thiamethoxam and fenpropathrin. In addition, co-silencing by creating a well-designed dsRNA interfusion against multiple genes was a good RNAi strategy in D. citri. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Xiudao Yu
- Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, FL, USA
- School of Agricultural Engineering/Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project/Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, Nanyang, Henan, China
| | - Nabil Killiny
- Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, FL, USA
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Yu X, Gowda S, Killiny N. Double-stranded RNA delivery through soaking mediates silencing of the muscle protein 20 and increases mortality to the Asian citrus psyllid, Diaphorina citri. PEST MANAGEMENT SCIENCE 2017; 73:1846-1853. [PMID: 28195429 DOI: 10.1002/ps.4549] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 01/26/2017] [Accepted: 02/07/2017] [Indexed: 05/24/2023]
Abstract
BACKGROUND Asian citrus psyllid, Diaphorina citri Kuwayama, is the most important economic pest of citrus because it transmits Candidatus Liberibacter asiaticus (CLas), the causal agent of huanglongbing (HLB). Silencing genes by RNA interference (RNAi) is a promising approach for controlling D. citri. RNAi-based insect management strategies depend on the selection of suitable target genes. RESULTS The muscle protein 20 gene DcMP20 was characterized from D. citri in an effort to impair proper muscle development through RNAi. Phylogenetic analysis showed that DcMP20 was more closely related to MP20 from Drosophila compared with its counterpart from other insect species. Developmental expression analysis revealed that transcription of DcMP20 was development dependent and reached a maximum level in the last instar (fourth-fifth) of the nymphal stage. The extent of RNAi in D. citri was dose dependent, with dsRNA-DcMP20 at 75 ng µL-1 being sufficient to knock down endogenous DcMP20 expression, which resulted in significant mortality and reduced body weight that positively correlated with the silencing of DcMP20. No effect was found when dsRNA-GFP or water was used, indicating the specific effect of dsRNA-DcMP20. CONCLUSION Our results suggest that dsRNA can be delivered to D. citri through soaking, and DcMP20 is an effective RNAi target to be used in the management of D. citri. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Xiudao Yu
- Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, FL, USA
- School of Agricultural Engineering/Henan Collaborative Innovation Center of Water Security for Water Source Region of Mid-line of South-to-North Diversion Project, Nanyang Normal University, Nanyang, Henan, China
| | - Siddarame Gowda
- Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, FL, USA
| | - Nabil Killiny
- Citrus Research and Education Center, IFAS, University of Florida, Lake Alfred, FL, USA
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20
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Li T, Chen J, Fan X, Chen W, Zhang W. MicroRNA and dsRNA targeting chitin synthase A reveal a great potential for pest management of the hemipteran insect Nilaparvata lugens. PEST MANAGEMENT SCIENCE 2017; 73:1529-1537. [PMID: 27885784 DOI: 10.1002/ps.4492] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/21/2016] [Accepted: 11/22/2016] [Indexed: 05/21/2023]
Abstract
BACKGROUND Two RNA silencing pathways in insects are known to exist that are mediated by short interfering RNAs (siRNAs) and microRNAs (miRNAs), which have been hypothesised to be promising methods for insect pest control. However, a comparison between miRNA and siRNA in pest control is still unavailable, particularly in targeting chitin synthase gene A (CHSA). RESULTS The dsRNA for Nilaparvata lugens CHSA (dsNlCHSA) and the microR-2703 (miR-2703) mimic targeting NlCHSA delivered via feeding affected the development of nymphs, reduced their chitin content and led to lethal phenotypes. The protein level of NlCHSA was downregulated after female adults were injected with dsNlCHSA or the miR-2703 mimic, but there were no significant differences in vitellogenin (NlVg) expression or in total oviposition relative to the control group. However, 90.68 and 46.13% of the eggs laid by the females injected with dsNlCHSA and miR-2703 mimic were unable to hatch, respectively. In addition, a second-generation miRNA and RNAi effect on N. lugens was observed. CONCLUSION Ingested miR-2703 seems to be a good option for killing N. lugens nymphs, while NlCHSA may be a promising target for RNAi-based pest management. These findings provide important evidence for applications of small non-coding RNAs (snRNAs) in insect pest management. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Tengchao Li
- State Key Laboratory of Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Jie Chen
- State Key Laboratory of Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xiaobin Fan
- State Key Laboratory of Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Weiwen Chen
- State Key Laboratory of Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou, China
- Shenzhen Research Institute, Sun Yat-sen University, Shenzhen, China
| | - Wenqing Zhang
- State Key Laboratory of Biocontrol and School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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21
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Yan T, Chen H, Sun Y, Yu X, Xia L. RNA Interference of the Ecdysone Receptor Genes EcR and USP in Grain Aphid (Sitobion avenae F.) Affects Its Survival and Fecundity upon Feeding on Wheat Plants. Int J Mol Sci 2016; 17:E2098. [PMID: 27983619 PMCID: PMC5187898 DOI: 10.3390/ijms17122098] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 12/05/2016] [Accepted: 12/08/2016] [Indexed: 12/16/2022] Open
Abstract
RNA interference (RNAi) has been widely used in functional genomics of insects and received intensive attention in the development of RNAi-based plants for insect control. Ecdysone receptor (EcR) and ultraspiracle protein (USP) play important roles in molting, metamorphosis, and reproduction of insects. EcR and USP orthologs and their function in grain aphid (Sitobion avenae F.) have not been documented yet. Here, RT-PCR, qRT-PCR, dsRNA feeding assay and aphid bioassay were employed to isolate EcR and USP orthologs in grain aphid, investigate their expression patterns, and evaluate the effect of RNAi on aphid survival and fecundity, and its persistence. The results indicated that SaEcR and SaUSP exhibited similar expression profiles at different developmental stages. Oral administration of dsRNAs of SaEcR and dsSaUSP significantly decreased the survival of aphids due to the down-regulation of these two genes, respectively. The silencing effect was persistent and transgenerational, as demonstrated by the reduced survival and fecundity due to knock-down of SaEcR and SaUSP in both the surviving aphids and their offspring, even after switching to aphid-susceptible wheat plants. Taken together, our results demonstrate that SaEcR and SaUSP are essential genes in aphid growth and development, and could be used as RNAi targets for wheat aphid control.
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Affiliation(s)
- Ting Yan
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
| | - Hongmei Chen
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
| | - Yongwei Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
| | - Xiudao Yu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
| | - Lanqin Xia
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China.
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22
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Yu XD, Liu ZC, Huang SL, Chen ZQ, Sun YW, Duan PF, Ma YZ, Xia LQ. RNAi-mediated plant protection against aphids. PEST MANAGEMENT SCIENCE 2016; 72:1090-8. [PMID: 26888776 DOI: 10.1002/ps.4258] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/21/2015] [Accepted: 02/15/2016] [Indexed: 05/10/2023]
Abstract
Aphids (Aphididae) are major agricultural pests that cause significant yield losses of crop plants each year by inflicting damage both through the direct effects of feeding and by vectoring harmful plant viruses. Expression of double-stranded RNA (dsRNA) directed against suitable insect target genes in transgenic plants has been shown to give protection against pests through plant-mediated RNA interference (RNAi). Thus, as a potential alternative and effective strategy for insect pest management in agricultural practice, plant-mediated RNAi for aphid control has received close attention in recent years. In this review, the mechanism of RNAi in insects and the so far explored effective RNAi target genes in aphids, their potential applications in the development of transgenic plants for aphid control and the major challenges in this regard are reviewed, and the future prospects of using plant-mediated RNAi for aphid control are discussed. This review is intended to be a helpful insight into the generation of aphid-resistant plants through plant-mediated RNAi strategy. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Xiu-Dao Yu
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zong-Cai Liu
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Si-Liang Huang
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Zhi-Qin Chen
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - Yong-Wei Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Peng-Fei Duan
- School of Life Science and Technology, Nanyang Normal University, Nanyang, Henan, China
| | - You-Zhi Ma
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lan-Qin Xia
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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Koramutla MK, Bhatt D, Negi M, Venkatachalam P, Jain PK, Bhattacharya R. Strength, Stability, and cis-Motifs of In silico Identified Phloem-Specific Promoters in Brassica juncea (L.). FRONTIERS IN PLANT SCIENCE 2016; 7:457. [PMID: 27148290 PMCID: PMC4834444 DOI: 10.3389/fpls.2016.00457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 03/24/2016] [Indexed: 05/03/2023]
Abstract
Aphids, a hemipteran group of insects pose a serious threat to many of the major crop species including Brassica oilseeds. Transgenic strategies for developing aphid-resistant plant types necessitate phloem-bound expression of the insecticidal genes. A few known phloem-specific promoters, in spite of tissue-specific activity fail to confer high level gene-expression. Here, we identified seven orthologues of phloem-specific promoters in B. juncea (Indian mustard), and experimentally validated their strength of expression in phloem exudates. Significant cis-motifs, globally occurring in phloem-specific promoters showed variable distribution frequencies in these putative phloem-specific promoters of B. juncea. In RT-qPCR based gene-expression study promoter of Glutamine synthetase 3A (GS3A) showed multifold higher activity compared to others, across the different growth stages of B. juncea plants. A statistical method employing four softwares was devised for rapidly analysing stability of the promoter-activities across the plant developmental stages. Different statistical softwares ranked these B. juncea promoters differently in terms of their stability in promoter-activity. Nevertheless, the consensus in output empirically suggested consistency in promoter-activity of the six B. juncea phloem- specific promoters including GS3A. The study identified suitable endogenous promoters for high level and consistent gene-expression in B. juncea phloem exudate. The study also demonstrated a rapid method of assessing species-specific strength and stability in expression of the endogenous promoters.
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Affiliation(s)
- Murali Krishna Koramutla
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute CampusNew Delhi, India
| | - Deepa Bhatt
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute CampusNew Delhi, India
| | - Manisha Negi
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute CampusNew Delhi, India
| | | | - Pradeep K. Jain
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute CampusNew Delhi, India
| | - Ramcharan Bhattacharya
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute CampusNew Delhi, India
- *Correspondence: Ramcharan Bhattacharya ;
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Ahmad-Sohdi NAS, Seman-Kamarulzaman AF, Mohamed-Hussein ZA, Hassan M. Purification and Characterization of a Novel NAD(P)+-Farnesol Dehydrogenase from Polygonum minus Leaves. PLoS One 2015; 10:e0143310. [PMID: 26600471 PMCID: PMC4657912 DOI: 10.1371/journal.pone.0143310] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 11/03/2015] [Indexed: 11/18/2022] Open
Abstract
Juvenile hormones have attracted attention as safe and selective targets for the design and development of environmentally friendly and biorational insecticides. In the juvenile hormone III biosynthetic pathway, the enzyme farnesol dehydrogenase catalyzes the oxidation of farnesol to farnesal. In this study, farnesol dehydrogenase was extracted from Polygonum minus leaves and purified 204-fold to apparent homogeneity by ion-exchange chromatography using DEAE-Toyopearl, SP-Toyopearl, and Super-Q Toyopearl, followed by three successive purifications by gel filtration chromatography on a TSK-gel GS3000SW. The enzyme is a heterodimer comprised of subunits with molecular masses of 65 kDa and 70 kDa. The optimum temperature and pH were 35°C and pH 9.5, respectively. Activity was inhibited by sulfhydryl reagents, metal-chelating agents and heavy metal ions. The enzyme utilized both NAD+ and NADP+ as coenzymes with Km values of 0.74 mM and 40 mM, respectively. Trans, trans-farnesol was the preferred substrate for the P. minus farnesol dehydrogenase. Geometrical isomers of trans, trans-farnesol, cis, trans-farnesol and cis, cis-farnesol were also oxidized by the enzyme with lower activity. The Km values for trans, trans-farnesol, cis, trans-farnesol and cis, cis-farnesol appeared to be 0.17 mM, 0.33 mM and 0.42 mM, respectively. The amino acid sequences of 4 tryptic peptides of the enzyme were analyzed by MALDI-TOF/TOF-MS spectrometry, and showed no significant similarity to those of previously reported farnesol dehydrogenases. These results suggest that the purified enzyme is a novel NAD(P)+-dependent farnesol dehydrogenase. The purification and characterization established in the current study will serve as a basis to provide new information for recombinant production of the enzyme. Therefore, recombinant farnesol dehydrogenase may provide a useful molecular tool in manipulating juvenile hormone biosynthesis to generate transgenic plants for pest control.
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Affiliation(s)
| | | | - Zeti-Azura Mohamed-Hussein
- Institute of Systems Biology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM, Bangi, Selangor, Malaysia
- School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
| | - Maizom Hassan
- Institute of Systems Biology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM, Bangi, Selangor, Malaysia
- * E-mail:
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25
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Wang GP, Yu XD, Fan J, Wang CS, Xia LQ. Expressing an (E)-β-farnesene synthase in the chloroplast of tobacco affects the preference of green peach aphid and its parasitoid. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2015; 57:770-82. [PMID: 25644472 DOI: 10.1111/jipb.12319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 12/04/2014] [Indexed: 06/04/2023]
Abstract
(E)-β-Farnesene (EβF) synthase catalyses the production of EβF, which for many aphids is the main or only component of the alarm pheromone causing the repellence of aphids and also functions as a kairomone for aphids' natural enemies. Many plants possess EβF synthase genes and can release EβF to repel aphids. In order to effectively recruit the plant-derived EβF synthase genes for aphid control, by using chloroplast transit peptide (CTP) of the small subunit of Rubisco (rbcS) from wheat (Triticum aestivum L.), we targeted AaβFS1, an EβF synthase gene from sweet wormwood (Artemisia annua L.), to the chloroplast of tobacco to generate CTP + AaβFS1 transgenic lines. The CTP + AaβFS1 transgenic tobacco plants could emit EβF at a level up to 19.25 ng/day per g fresh tissues, 4-12 fold higher than the AaβFS1 transgenic lines without chloroplast targeting. Furthermore, aphid/parasitoid behavioral bioassays demonstrated that the CTP + AaβFS1 transgenic tobacco showed enhanced repellence to green peach aphid (Myzus persicae) and attracted response of its parasitoid Diaeretiella rapae, thus affecting aphid infestation at two trophic levels. These data suggest that the chloroplast is an ideal subcellular compartment for metabolic engineering of plant-derived EβF synthase genes to generate a novel type of transgenic plant emitting an alarm pheromone for aphid control.
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Affiliation(s)
- Gen-Ping Wang
- College of Agronomy, Northwest A&F University/State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100, China
- Institute of Crop Sciences, the Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China
| | - Xiu-Dao Yu
- Institute of Crop Sciences, the Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China
- School of Life Science and Technology, Nanyang Normal University, Nanyang, 473061, China
| | - Jia Fan
- Institute of Crop Protection, the Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China
| | - Cheng-She Wang
- College of Agronomy, Northwest A&F University/State Key Laboratory of Crop Stress Biology in Arid Areas, Yangling, 712100, China
| | - Lan-Qin Xia
- Institute of Crop Sciences, the Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100081, China
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26
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Zhang Y, Li ZX, Yu XD, Fan J, Pickett JA, Jones HD, Zhou JJ, Birkett MA, Caulfield J, Napier JA, Zhao GY, Cheng XG, Shi Y, Bruce TJA, Xia LQ. Molecular characterization of two isoforms of a farnesyl pyrophosphate synthase gene in wheat and their roles in sesquiterpene synthesis and inducible defence against aphid infestation. THE NEW PHYTOLOGIST 2015; 206:1101-1115. [PMID: 25644034 DOI: 10.1111/nph.13302] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Accepted: 12/16/2014] [Indexed: 05/09/2023]
Abstract
Aphids are important pests of wheat (Triticum aestivum) that affect crop production globally. Herbivore-induced emission of sesquiterpenes can repel pests, and farnesyl pyrophosphate synthase (FPS) is a key enzyme involved in sesquiterpene biosynthesis. However, fps orthologues in wheat and their functional roles in sesquiterpene synthesis and defence against aphid infestation are unknown. Here, two fps isoforms, Tafps1 and Tafps2, were identified in wheat. Quantitative real-time polymerase chain reaction (qRT-PCR) and in vitro catalytic activity analyses were conducted to investigate expression patterns and activity. Heterologous expression of these isoforms in Arabidopsis thaliana, virus-induced gene silencing (VIGS) in wheat and aphid behavioural assays were performed to understand the functional roles of these two isoforms. We demonstrated that Tafps1 and Tafps2 played different roles in induced responses to aphid infestation and in sesquiterpene synthesis. Heterologous expression in A. thaliana resulted in repulsion of the peach aphid (Myzus persicae). Wheat plants with these two isoforms transiently silenced were significantly attractive to grain aphid (Sitobion avenae). Our results provide new insights into induced defence against aphid herbivory in wheat, in particular, the different roles of the two Tafps isoforms in both sesquiterpene biosynthesis and defence against aphid infestation.
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Affiliation(s)
- Yan Zhang
- The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture, 11 Keyuanjing 4 Road, Laoshan District, Qingdao, 266101, China
| | - Zhi-Xia Li
- The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Xiu-Dao Yu
- The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Jia Fan
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China
| | - John A Pickett
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - Huw D Jones
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | | | | | - John Caulfield
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | | | - Guang-Yao Zhao
- The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Xian-Guo Cheng
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
| | - Yi Shi
- Tobacco Research Institute, Chinese Academy of Agricultural Sciences (CAAS)/Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture, 11 Keyuanjing 4 Road, Laoshan District, Qingdao, 266101, China
| | - Toby J A Bruce
- Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK
| | - Lan-Qin Xia
- The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences (CAAS), 12 Zhongguancun South Street, Beijing, 100081, China
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27
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Kim YH, Soumaila Issa M, Cooper AMW, Zhu KY. RNA interference: Applications and advances in insect toxicology and insect pest management. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 120:109-17. [PMID: 25987228 DOI: 10.1016/j.pestbp.2015.01.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 01/05/2015] [Accepted: 01/05/2015] [Indexed: 05/27/2023]
Abstract
Since its discovery, RNA interference (RNAi) has revolutionized functional genomic studies due to its sequence-specific nature of post-transcriptional gene silencing. In this paper, we provide a comprehensive review of the recent literature and summarize the current knowledge and advances in the applications of RNAi technologies in the field of insect toxicology and insect pest management. Many recent studies have focused on identification and validation of the genes encoding insecticide target proteins, such as acetylcholinesterases, ion channels, Bacillus thuringiensis receptors, and other receptors in the nervous system. RNAi technologies have also been widely applied to reveal the role of genes encoding cytochrome P450 monooxygenases, carboxylesterases, and glutathione S-transferases in insecticide detoxification and resistance. More recently, studies have focused on understanding the mechanism of insecticide-mediated up-regulation of detoxification genes in insects. As RNAi has already shown great potentials for insect pest management, many recent studies have also focused on host-induced gene silencing, in which several RNAi-based transgenic plants have been developed and tested as proof of concept for insect pest management. These studies indicate that RNAi is a valuable tool to address various fundamental questions in insect toxicology and may soon become an effective strategy for insect pest management.
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Affiliation(s)
- Young Ho Kim
- Department of Entomology, Kansas State University, Manhattan, KS 66506-4004, USA
| | | | - Anastasia M W Cooper
- Department of Entomology, Kansas State University, Manhattan, KS 66506-4004, USA
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS 66506-4004, USA.
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28
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Verma SS, Sinha RK, Jajoo A. (E)-β-farnesene gene reduces Lipaphis erysimi colonization in transgenic Brassica juncea lines. PLANT SIGNALING & BEHAVIOR 2015; 10:e1042636. [PMID: 26251882 PMCID: PMC4623259 DOI: 10.1080/15592324.2015.1042636] [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: 02/27/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 06/04/2023]
Abstract
Aphids are the major concern that significantly reduces the yield of crops. (E)-β-farnesene (Eβf) is the principal component of the alarm pheromone of many aphids. The results of current research support the direct defense response of (E)-β-farnesene (Eβf) against aphid Lipaphis erysimi (L.) Kaltenbach in Brassica juncea. Eβf gene was isolated from Mentha arvensis and transformed into B. juncea, showed direct repellent against aphid colonization. The seasonal mean population (SMP) recorded under field condition showed significantly higher aphid colonization in wild type in comparison to most of the transgenic lines, and shows positive correlation with the repellency of transgenic plant expressing (E)-β-farnesene. The current research investigation provides direct evidence for aphid control in B. juncea using Eβf, a non-toxic mode of action.
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Affiliation(s)
- Shiv Shankar Verma
- Agricultural and Agri-Food Canada; Lethbridge, Canada
- National Research Center on Plant Biotechnology; New Delhi, India
| | - Rakesh Kumar Sinha
- Agricultural and Agri-Food Canada; Lethbridge, Canada
- National Research Center on Plant Biotechnology; New Delhi, India
| | - Anajna Jajoo
- School of Life Sciences; Devi Ahilya University; Indore, India
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29
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Van Nhan L, Ma C, Rui Y, Cao W, Deng Y, Liu L, Xing B. The Effects of Fe2O3 Nanoparticles on Physiology and Insecticide Activity in Non-Transgenic and Bt-Transgenic Cotton. FRONTIERS IN PLANT SCIENCE 2015; 6:1263. [PMID: 26834767 PMCID: PMC4722122 DOI: 10.3389/fpls.2015.01263] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 12/24/2015] [Indexed: 05/20/2023]
Abstract
As the demands for nanotechnology and nanoparticle (NP) applications in agriculture increase, the ecological risk has drawn more attention because of the unpredictable results of interactions between NPs and transgenic crops. In this study, we investigated the effects of various concentrations of Fe2O3 NPs on Bt-transgenic cotton in comparison with conventional cotton for 10 days. Each treatment was conducted in triplicate, and each experiment was repeated three times. Results demonstrated that Fe2O3 NPs inhibited the plant height and root length of Bt-transgenic cotton and promoted root hairs and biomass of non-transgenic cotton. Nutrients such as Na and K in Bt-transgenic cotton roots increased, while Zn contents decreased with Fe2O3 NPs. Most hormones in the roots of Bt-transgenic cotton increased at low Fe2O3 NP exposure (100 mg⋅L(-1)) but decreased at high concentrations of Fe2O3 NPs (1000 mg⋅L(-1)). Fe2O3 NPs increased the Bt-toxin in leaves and roots of Bt-transgenic cotton. Fe2O3 NPs were absorbed into roots, then transported to the shoots of both Bt-transgenic and non-transgenic cottons. The bioaccumulation of Fe2O3 NPs in plants might be a potential risk for agricultural crops and affect the environment and human health.
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Affiliation(s)
- Le Van Nhan
- College of Resources and Environmental Sciences, China Agricultural UniversityBeijing, China
- Center for Training, Consultancy, and Technology Transfer, Vietnam Academy of Science and TechnologyHanoi, Vietnam
| | - Chuanxin Ma
- Stockbridge School of Agriculture, University of Massachusetts Amherst, AmherstMA, USA
| | - Yukui Rui
- College of Resources and Environmental Sciences, China Agricultural UniversityBeijing, China
- Stockbridge School of Agriculture, University of Massachusetts Amherst, AmherstMA, USA
- *Correspondence: Yukui Rui, ;
| | - Weidong Cao
- Institute of Resource and Regional Planning, Chinese Academy of Agricultural SciencesBeijing, China
| | - Yingqing Deng
- Stockbridge School of Agriculture, University of Massachusetts Amherst, AmherstMA, USA
| | - Liming Liu
- College of Resources and Environmental Sciences, China Agricultural UniversityBeijing, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts Amherst, AmherstMA, USA
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30
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Wang D, Liu Q, Li X, Sun Y, Wang H, Xia L. Double-stranded RNA in the biological control of grain aphid (Sitobion avenae F.). Funct Integr Genomics 2014; 15:211-23. [DOI: 10.1007/s10142-014-0424-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 11/18/2014] [Accepted: 11/24/2014] [Indexed: 10/24/2022]
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