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Garrett D, Teakle G, Collier R, Bell JR, Cerezo-Medina S, Morales-Hojas R. Genome assembly and transcriptomic analysis to elucidate the ability of Nasonovia ribisnigri to break host plant resistance. INSECT MOLECULAR BIOLOGY 2024; 33:228-245. [PMID: 38348538 DOI: 10.1111/imb.12894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 01/09/2024] [Indexed: 02/27/2024]
Abstract
Aphid genomic resources enable the study of complex life history traits and provide information on vector biology, host adaption and speciation. The currant-lettuce aphid (Nasonovia ribisnigri (Hemiptera: Aphididae) (Mosley)) is a cosmopolitan pest of outdoor lettuce (Lactuca sativa (Asterales: Asteraceae) (Linnaeus)). Until recently, the use of resistant cultivars was an effective method for managing N. ribisnigri. A resistant cultivar containing a single gene (Nr-locus), introduced in the 1980s, conferred complete resistance to feeding. Overreliance of this Nr-locus in lettuce resulted in N. ribisnigri's ability to break resistance mechanism, with first reports during 2003. Our work attempts to understand which candidate gene(s) are associated with this resistance-breaking mechanism. We present two de novo draft assembles for N. ribisnigri genomes, corresponding to both avirulent (Nr-locus susceptible) and virulent (Nr-locus resistant) biotypes. Changes in gene expression of the two N. ribisnigri biotypes were investigated using transcriptomic analyses of RNA-sequencing (RNA-seq) data to understand the potential mechanisms of resistance to the Nr-locus in lettuce. The draft genome assemblies were 94.2% and 91.4% complete for the avirulent and virulent biotypes, respectively. Out of the 18,872 differentially expressed genes, a single gene/locus was identified in N. ribisnigri that was shared between two resistant-breaking biotypes. This locus was further explored and validated in Real-Time Quantitative Reverse Transcription PCR (qRT-PCR) experiments and has predicted localisations in both the cytoplasm and nucleus. This is the first study to provide evidence that a single gene/locus is likely responsible for the ability of N. ribisnigri to overcome the Nr-locus resistance in the lettuce host.
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Affiliation(s)
- Dion Garrett
- Rothamsted Insect Survey, Rothamsted Research, Harpenden, UK
- Warwick Crop Centre, Wellesbourne Campus, University of Warwick, Warwick, UK
| | - Graham Teakle
- Warwick Crop Centre, Wellesbourne Campus, University of Warwick, Warwick, UK
| | - Rosemary Collier
- Warwick Crop Centre, Wellesbourne Campus, University of Warwick, Warwick, UK
| | - James R Bell
- Rothamsted Insect Survey, Rothamsted Research, Harpenden, UK
- Centre for Applied Entomology and Parasitology, School of Life Sciences, Keele University, Keele, UK
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Razzaq MK, Hina A, Abbasi A, Karikari B, Ashraf HJ, Mohiuddin M, Maqsood S, Maqsood A, Haq IU, Xing G, Raza G, Bhat JA. Molecular and genetic insights into secondary metabolic regulation underlying insect-pest resistance in legumes. Funct Integr Genomics 2023; 23:217. [PMID: 37392308 DOI: 10.1007/s10142-023-01141-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 06/15/2023] [Accepted: 06/19/2023] [Indexed: 07/03/2023]
Abstract
Insect pests pose a major threat to agricultural production, resulting in significant economic losses for countries. A high infestation of insects in any given area can severely reduce crop yield and quality. This review examines the existing resources for managing insect pests and highlights alternative eco-friendly techniques to enhance insect pest resistance in legumes. Recently, the application of plant secondary metabolites has gained popularity in controlling insect attacks. Plant secondary metabolites encompass a wide range of compounds such as alkaloids, flavonoids, and terpenoids, which are often synthesized through intricate biosynthetic pathways. Classical methods of metabolic engineering involve manipulating key enzymes and regulatory genes to enhance or redirect the production of secondary metabolites in plants. Additionally, the role of genetic approaches, such as quantitative trait loci mapping, genome-wide association (GWAS) mapping, and metabolome-based GWAS in insect pest management is discussed, also, the role of precision breeding, such as genome editing technologies and RNA interference for identifying pest resistance and manipulating the genome to develop insect-resistant cultivars are explored, highlighting the positive contribution of plant secondary metabolites engineering-based resistance against insect pests. It is suggested that by understanding the genes responsible for beneficial metabolite compositions, future research might hold immense potential to shed more light on the molecular regulation of secondary metabolite biosynthesis, leading to advancements in insect-resistant traits in crop plants. In the future, the utilization of metabolic engineering and biotechnological methods may serve as an alternative means of producing biologically active, economically valuable, and medically significant compounds found in plant secondary metabolites, thereby addressing the challenge of limited availability.
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Affiliation(s)
- Muhammad Khuram Razzaq
- Soybean Research Institute & MARA National Centre for Soybean Improvement & MARA Key Laboratory of Biology and Genetic Improvement of Soybean & National Key Laboratory for Crop Genetics and Germplasm Enhancement & Jiangsu Collaborative Innovation Centre for Modern Crop Production, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Aiman Hina
- Ministry of Agriculture (MOA) National Centre for Soybean Improvement, State Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Asim Abbasi
- Department of Environmental Sciences, Kohsar University Murree, Murree, 47150, Pakistan
| | - Benjamin Karikari
- Department of Agricultural Biotechnology, Faculty of Agriculture, Food and Consumer Sciences, University for Development Studies, Tamale, Ghana
| | - Hafiza Javaria Ashraf
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Muhammad Mohiuddin
- Environmental Management Consultants (EMC) Private Limited, Islamabad, 44000, Pakistan
| | - Sumaira Maqsood
- Department of Environmental Sciences, Kohsar University Murree, Murree, 47150, Pakistan
| | - Aqsa Maqsood
- Department of Zoology, University of Central Punjab, Bahawalpur, 63100, Pakistan
| | - Inzamam Ul Haq
- College of Plant Protection, Gansu Agricultural University, Lanzhou, No. 1 Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Guangnan Xing
- Soybean Research Institute & MARA National Centre for Soybean Improvement & MARA Key Laboratory of Biology and Genetic Improvement of Soybean & National Key Laboratory for Crop Genetics and Germplasm Enhancement & Jiangsu Collaborative Innovation Centre for Modern Crop Production, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ghulam Raza
- National Institute for Biotechnology and Genetic Engineering Faisalabad, Faisalabad, Pakistan
| | - Javaid Akhter Bhat
- International Genome Center, Jiangsu University, Zhenjiang, 212013, China
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Wang H, Shi S, Hua W. Advances of herbivore-secreted elicitors and effectors in plant-insect interactions. FRONTIERS IN PLANT SCIENCE 2023; 14:1176048. [PMID: 37404545 PMCID: PMC10317074 DOI: 10.3389/fpls.2023.1176048] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 03/31/2023] [Indexed: 07/06/2023]
Abstract
Diverse molecular processes regulate the interactions between insect herbivores and their host plants. When plants are exposed to insects, elicitors induce plant defenses, and complex physiological and biochemical processes are triggered, such as the activation of the jasmonic acid (JA) and salicylic acid (SA) pathways, Ca2+ flux, reactive oxygen species (ROS) burst, mitogen-activated protein kinase (MAPK) activation, and other responses. For better adaptation, insects secrete a large number of effectors to interfere with plant defenses on multiple levels. In plants, resistance (R) proteins have evolved to recognize effectors and trigger stronger defense responses. However, only a few effectors recognized by R proteins have been identified until now. Multi-omics approaches for high-throughput elicitor/effector identification and functional characterization have been developed. In this review, we mainly highlight the recent advances in the identification of the elicitors and effectors secreted by insects and their target proteins in plants and discuss their underlying molecular mechanisms, which will provide new inspiration for controlling these insect pests.
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Affiliation(s)
- Huiying Wang
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
| | - Shaojie Shi
- Hubei Hongshan Laboratory, Wuhan, China
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Institute of Food Crops, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Wei Hua
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, China
- Hubei Hongshan Laboratory, Wuhan, China
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Dong Y, Zhou J, Yang Y, Lu W, Jin Y, Huang X, Zhang W, Li J, Ai G, Yin Z, Shen D, Jing M, Dou D, Xia A. Cyclophilin effector Al106 of mirid bug Apolygus lucorum inhibits plant immunity and promotes insect feeding by targeting PUB33. THE NEW PHYTOLOGIST 2023; 237:2388-2403. [PMID: 36519219 DOI: 10.1111/nph.18675] [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: 09/16/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Apolygus lucorum (Meyer-Dur; Heteroptera: Miridae) is a major agricultural pest infesting crops, vegetables, and fruit trees. During feeding, A. lucorum secretes a plethora of effectors into its hosts to promote infestation. However, the molecular mechanisms of these effectors manipulating plant immunity are largely unknown. Here, we investigated the molecular mechanism underlying the effector Al106 manipulation of plant-insect interaction by RNA interference, electrical penetration graph, insect and pathogen bioassays, protein-protein interaction studies, and protein ubiquitination experiment. Expression of Al106 in Nicotiana benthamiana inhibits pathogen-associated molecular pattern-induced cell death and reactive oxygen species burst, and promotes insect feeding and plant pathogen infection. In addition, peptidyl-prolyl cis-trans isomerase (PPIase) activity of Al106 is required for its function to inhibit PTI.Al106 interacts with a plant U-box (PUB) protein, PUB33, from N. benthamiana and Arabidopsis thaliana. We also demonstrated that PUB33 is a positive regulator of plant immunity. Furthermore, an in vivo assay revealed that Al106 inhibits ubiquitination of NbPUB33 depending on PPIase activity. Our findings revealed that a novel cyclophilin effector may interact with plant PUB33 to suppress plant immunity and facilitate insect feeding in a PPIase activity-dependent manner.
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Affiliation(s)
- Yumei Dong
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Jiangxuan Zhou
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Yuxia Yang
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Wangshan Lu
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Yan Jin
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Xingge Huang
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Wendan Zhang
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Jifen Li
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Gan Ai
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Zhiyuan Yin
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Danyu Shen
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Maofeng Jing
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Daolong Dou
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
| | - Ai Xia
- College of Plant Protection, Nanjing Agricultural University, 210000, Nanjing, China
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Additive genetic effects in interacting species jointly determine the outcome of caterpillar herbivory. Proc Natl Acad Sci U S A 2022; 119:e2206052119. [PMID: 36037349 PMCID: PMC9456756 DOI: 10.1073/pnas.2206052119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Plant-insect interactions are common and important in basic and applied biology. Trait and genetic variation can affect the outcome and evolution of these interactions, but the relative contributions of plant and insect genetic variation and how these interact remain unclear and are rarely subject to assessment in the same experimental context. Here, we address this knowledge gap using a recent host-range expansion onto alfalfa by the Melissa blue butterfly. Common garden rearing experiments and genomic data show that caterpillar performance depends on plant and insect genetic variation, with insect genetics contributing to performance earlier in development and plant genetics later. Our models of performance based on caterpillar genetics retained predictive power when applied to a second common garden. Much of the plant genetic effect could be explained by heritable variation in plant phytochemicals, especially saponins, peptides, and phosphatidyl cholines, providing a possible mechanistic understanding of variation in the species interaction. We find evidence of polygenic, mostly additive effects within and between species, with consistent effects of plant genotype on growth and development across multiple butterfly species. Our results inform theories of plant-insect coevolution and the evolution of diet breadth in herbivorous insects and other host-specific parasites.
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Groux R, Fouillen L, Mongrand S, Reymond P. Sphingolipids are involved in insect egg-induced cell death in Arabidopsis. PLANT PHYSIOLOGY 2022; 189:2535-2553. [PMID: 35608326 PMCID: PMC9342989 DOI: 10.1093/plphys/kiac242] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 05/04/2022] [Indexed: 05/05/2023]
Abstract
In Brassicaceae, hypersensitive-like programmed cell death (HR-like) is a central component of direct defenses triggered against eggs of the large white butterfly (Pieris brassicae). The signaling pathway leading to HR-like in Arabidopsis (Arabidopsis thaliana) is mainly dependent on salicylic acid (SA) accumulation, but downstream components are unclear. Here, we found that treatment with P. brassicae egg extract (EE) triggered changes in expression of sphingolipid metabolism genes in Arabidopsis and black mustard (Brassica nigra). Disruption of ceramide (Cer) synthase activity led to a significant decrease of EE-induced HR-like whereas SA signaling and reactive oxygen species levels were unchanged, suggesting that Cer are downstream activators of HR-like. Sphingolipid quantifications showed that Cer with C16:0 side chains accumulated in both plant species and this response was largely unchanged in the SA-induction deficient2 (sid2-1) mutant. Finally, we provide genetic evidence that the modification of fatty acyl chains of sphingolipids modulates HR-like. Altogether, these results show that sphingolipids play a key and specific role during insect egg-triggered HR-like.
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Affiliation(s)
- Raphaël Groux
- Department of Plant Molecular Biology, University of Lausanne, CH-1015 Lausanne, Switzerland
| | - Laetitia Fouillen
- Laboratoire de Biogénèse Membranaire, CNRS, UMR 5200, University of Bordeaux, F-33140 Villenave d’Ornon, France
| | - Sébastien Mongrand
- Laboratoire de Biogénèse Membranaire, CNRS, UMR 5200, University of Bordeaux, F-33140 Villenave d’Ornon, France
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7
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A fungal effector suppresses the nuclear export of AGO1-miRNA complex to promote infection in plants. Proc Natl Acad Sci U S A 2022; 119:e2114583119. [PMID: 35290117 PMCID: PMC8944911 DOI: 10.1073/pnas.2114583119] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
SignificanceIncreasing evidence demonstrates that small RNAs can serve as trafficking effectors to mediate bidirectional transkingdom RNA interference (RNAi) in interacting organisms, including plant-pathogenic fungi systems. Previous findings demonstrated that plants can send microRNAs (miRNAs) to fungal pathogen Verticillium dahliae to trigger antifungal RNAi. Here we report that V. dahliae is able to secret an effector to the plant nucleus to interfere with the nuclear export of AGO1-miRNA complexes, leading to an inhibition in antifungal RNAi and increased virulence in plants. Thus, we reveal an antagonistic mechanism that can be exploited by fungal pathogens to counteract antifungal RNAi immunity via manipulation of plant small RNA function.
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8
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Enders L, Begcy K. Unconventional routes to developing insect-resistant crops. MOLECULAR PLANT 2021; 14:1439-1453. [PMID: 34217871 DOI: 10.1016/j.molp.2021.06.029] [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] [Received: 03/01/2021] [Revised: 05/26/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
Concerns over widespread use of insecticides and heightened insect pest virulence under climate change continue to fuel the need for environmentally safe and sustainable control strategies. However, to develop such strategies, a better understanding of the molecular basis of plant-pest interactions is still needed. Despite decades of research investigating plant-insect interactions, few examples exist where underlying molecular mechanisms are well characterized, and even rarer are cases where this knowledge has been successfully applied to manage harmful agricultural pests. Consequently, the field appears to be static, urgently needing shifts in approaches to identify novel mechanisms by which insects colonize plants and plants avoid insect pressure. In this perspective, we outline necessary steps for advancing holistic methodologies that capture complex plant-insect molecular interactions. We highlight novel and underexploited approaches in plant-insect interaction research as essential routes to translate knowledge of underlying molecular mechanisms into durable pest control strategies, including embracing microbial partnerships, identifying what makes a plant an unsuitable host, capitalizing on tolerance of insect damage, and learning from cases where crop domestication and agronomic practices enhance pest virulence.
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Affiliation(s)
- Laramy Enders
- Purdue University, Department of Entomology, West Lafayette, IN 47907, USA.
| | - Kevin Begcy
- University of Florida, Environmental Horticulture Department, Gainesville, FL 32611, USA.
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Michel A, Harris M. Editorial overview: Why modern research justifies the re-emergence of host-plant resistance as a focus for pest management. CURRENT OPINION IN INSECT SCIENCE 2021; 45:iii-v. [PMID: 34303486 DOI: 10.1016/j.cois.2021.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Andy Michel
- Department of Entomology, The Ohio State University, United States.
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10
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Korgaonkar A, Han C, Lemire AL, Siwanowicz I, Bennouna D, Kopec RE, Andolfatto P, Shigenobu S, Stern DL. A novel family of secreted insect proteins linked to plant gall development. Curr Biol 2021; 31:1836-1849.e12. [PMID: 33657407 PMCID: PMC8119383 DOI: 10.1016/j.cub.2021.01.104] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 12/23/2020] [Accepted: 01/28/2021] [Indexed: 12/17/2022]
Abstract
In an elaborate form of inter-species exploitation, many insects hijack plant development to induce novel plant organs called galls that provide the insect with a source of nutrition and a temporary home. Galls result from dramatic reprogramming of plant cell biology driven by insect molecules, but the roles of specific insect molecules in gall development have not yet been determined. Here, we study the aphid Hormaphis cornu, which makes distinctive "cone" galls on leaves of witch hazel Hamamelis virginiana. We found that derived genetic variants in the aphid gene determinant of gall color (dgc) are associated with strong downregulation of dgc transcription in aphid salivary glands, upregulation in galls of seven genes involved in anthocyanin synthesis, and deposition of two red anthocyanins in galls. We hypothesize that aphids inject DGC protein into galls and that this results in differential expression of a small number of plant genes. dgc is a member of a large, diverse family of novel predicted secreted proteins characterized by a pair of widely spaced cysteine-tyrosine-cysteine (CYC) residues, which we named BICYCLE proteins. bicycle genes are most strongly expressed in the salivary glands specifically of galling aphid generations, suggesting that they may regulate many aspects of gall development. bicycle genes have experienced unusually frequent diversifying selection, consistent with their potential role controlling gall development in a molecular arms race between aphids and their host plants.
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Affiliation(s)
- Aishwarya Korgaonkar
- Janelia Research Campus of the Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA
| | - Clair Han
- Janelia Research Campus of the Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA
| | - Andrew L Lemire
- Janelia Research Campus of the Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA
| | - Igor Siwanowicz
- Janelia Research Campus of the Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA
| | - Djawed Bennouna
- Human Nutrition Program, Department of Human Sciences, The Ohio State University, 262G Campbell Hall, 1787 Neil Avenue, Columbus, OH 43210, USA
| | - Rachel E Kopec
- Human Nutrition Program, Department of Human Sciences, The Ohio State University, 262G Campbell Hall, 1787 Neil Avenue, Columbus, OH 43210, USA; Ohio State University's Foods for Health Discovery Theme, The Ohio State University, 262G Campbell Hall, 1787 Neil Avenue, Columbus, OH 43210, USA
| | - Peter Andolfatto
- Department of Biology, Columbia University, 600 Fairchild Center, New York, NY 10027, USA
| | - Shuji Shigenobu
- Laboratory of Evolutionary Genomics, Center for the Development of New Model Organism, National Institute for Basic Biology, Okazaki 444-8585, Japan; NIBB Research Core Facilities, National Institute for Basic Biology, Okazaki 444-8585, Japan; Department of Basic Biology, School of Life Science, SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan
| | - David L Stern
- Janelia Research Campus of the Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, VA 20147, USA.
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11
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Korgaonkar A, Han C, Lemire AL, Siwanowicz I, Bennouna D, Kopec RE, Andolfatto P, Shigenobu S, Stern DL. A novel family of secreted insect proteins linked to plant gall development. Curr Biol 2021. [PMID: 33974861 DOI: 10.1101/2020.10.28.359562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
AbstractIn an elaborate form of inter-species exploitation, many insects hijack plant development to induce novel plant organs called galls that provide the insect with a source of nutrition and a temporary home. Galls result from dramatic reprogramming of plant cell biology driven by insect molecules, but the roles of specific insect molecules in gall development have not yet been determined. Here we study the aphidHormaphis cornu, which makes distinctive “cone” galls on leaves of witch hazelHamamelis virginiana. We found that derived genetic variants in the aphid genedeterminant of gall color(dgc) are associated with strong downregulation ofdgctranscription in aphid salivary glands, upregulation in galls of seven genes involved in anthocyanin synthesis, and deposition of two red anthocyanins in galls. We hypothesize that aphids inject DGC protein into galls, and that this results in differential expression of a small number of plant genes.Dgcis a member of a large, diverse family of novel predicted secreted proteins characterized by a pair of widely spaced cysteine-tyrosine-cysteine (CYC) residues, which we named BICYCLE proteins.Bicyclegenes are most strongly expressed in the salivary glands specifically of galling aphid generations, suggesting that they may regulate many aspects of gall development.Bicyclegenes have experienced unusually frequent diversifying selection, consistent with their potential role controlling gall development in a molecular arms race between aphids and their host plants.One Sentence SummaryAphidbicyclegenes, which encode diverse secreted proteins, contribute to plant gall development.
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12
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Oates CN, Denby KJ, Myburg AA, Slippers B, Naidoo S. Insect egg-induced physiological changes and transcriptional reprogramming leading to gall formation. PLANT, CELL & ENVIRONMENT 2021; 44:535-547. [PMID: 33125164 DOI: 10.1111/pce.13930] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/12/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
Gall-inducing insects and their hosts present some of the most intricate plant-herbivore interactions. Oviposition on the host is often the first cue of future herbivory and events at this early time point can affect later life stages. Many gallers are devastating plant pests, yet little information regarding the plant-insect molecular interplay exists, particularly following egg deposition. We studied the physiological and transcriptional responses of Eucalyptus following oviposition by the gall-inducing wasp, Leptocybe invasa, to explore potential mechanisms governing defence responses and gall development. RNA sequencing and microscopy were used to explore a susceptible Eucalyptus-L. invasa interaction. Infested and control material was compared over time (1-3, 7 and 90 days post oviposition) to examine the transcriptional and morphological changes. Oviposition induces accumulation of reactive oxygen species and phenolics which is reflected in the transcriptome analysis. Gene expression supports phytohormones and 10 transcription factor subfamilies as key regulators. The egg and oviposition fluid stimulate cell division resulting in gall development. Eucalyptus responses to oviposition are apparent within 24 hr. Putative defences include the oxidative burst and barrier reinforcement. However, egg and oviposition fluid stimuli may redirect these responses towards gall development.
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Affiliation(s)
- Caryn N Oates
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | | | - Alexander A Myburg
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Bernard Slippers
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
| | - Sanushka Naidoo
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa
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13
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Yates-Stewart AD, Pekarcik A, Michel A, Blakeslee JJ. Jasmonic Acid-Isoleucine (JA-Ile) Is Involved in the Host-Plant Resistance Mechanism Against the Soybean Aphid (Hemiptera: Aphididae). JOURNAL OF ECONOMIC ENTOMOLOGY 2020; 113:2972-2978. [PMID: 33033836 DOI: 10.1093/jee/toaa221] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Indexed: 06/11/2023]
Abstract
Host-plant resistance (HPR) is an important tool for pest management, affording both economic and environmental benefits. The mechanisms of aphid resistance in soybean are not well understood, but likely involve the induction of the jasmonic acid (JA) pathway, and possibly other phytohormone signals involved in plant defense responses. Despite the efficacy of aphid resistance in soybean, virulent aphids have overcome this resistance through mostly unknown mechanisms. Here, we have used metabolomic tools to define the role of plant phytohormones, especially the JA pathway, in regulating interactions between aphid-resistant soybean and virulent aphids. We hypothesized that virulent aphids avoid or suppress the JA pathway to overcome aphid resistance. Our results suggested that aphid-resistant soybean increased accumulation of JA-isoleucine (JA-Ile) only when infested with avirulent aphids; virulent aphids did not cause induction of JA-Ile. Further, applying JA-Ile to aphid-resistant soybean reduced subsequent virulent aphid populations. The concentrations of other phytohormones remained unchanged due to aphid feeding, highlighting the importance of JA-Ile in this interaction. These results increase our knowledge of soybean resistance mechanisms against soybean aphids and contribute to our understanding of aphid virulence mechanisms, which will in turn promote the durability of HPR.
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Affiliation(s)
- Ashley D Yates-Stewart
- Center for Applied Plant Sciences, The Ohio State University, CFAES Wooster Campus, Wooster, OH
| | - Adrian Pekarcik
- Department of Entomology, The Ohio State University, CFAES Wooster Campus, Wooster, OH
| | - Andy Michel
- Center for Applied Plant Sciences, The Ohio State University, CFAES Wooster Campus, Wooster, OH
- Department of Entomology, The Ohio State University, CFAES Wooster Campus, Wooster, OH
| | - Joshua J Blakeslee
- Center for Applied Plant Sciences, The Ohio State University, CFAES Wooster Campus, Wooster, OH
- Laboratory for the Analysis of Metabolites from Plants and Department of Horticulture and Crop Sciences, The Ohio State University, Wooster, OH
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14
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Etebari K, Lindsay KR, Ward AL, Furlong MJ. Australian sugarcane soldier fly's salivary gland transcriptome in response to starvation and feeding on sugarcane crops. INSECT SCIENCE 2020; 27:708-720. [PMID: 30946538 DOI: 10.1111/1744-7917.12676] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 03/27/2019] [Accepted: 03/31/2019] [Indexed: 06/09/2023]
Abstract
The soldier fly is an endemic pest of sugarcane in Australia. Small numbers of larvae can cause significant damage to roots and reduce the crop yields. Little is known about the composition and function of the soldier fly salivary gland, its secretions, and their roles in insect-plant interactions. In this study, we performed transcriptome analysis of the salivary glands of starved and sugarcane root-fed soldier fly larvae. A total of 31 119 highly expressed assembled contigs were identified in the salivary glands and almost 50% of them showed high levels of similarity to known proteins in Nr databases. Of all the obtained contigs, only 9727 sequences contain an open reading frame of over 100 amino acids. Around 31% of contigs were predicted to encode secretory proteins, including some digestive and detoxifying enzymes and potential effectors. Some known salivary secreted peptides such as serine protease, cysteine proteinase inhibitors, antimicrobial peptides and venom proteins were among the top 100 highly expressed genes. Differential gene expression analysis revealed significant modulation of 850 transcripts in salivary glands upon exposure to plant roots or starvation stress. Here, we identified some venom proteins which were significantly upregulated in the salivary glands of soldier fly larvae exposed to sugarcane roots. In other insects and nematodes some of these proteins have been used to manipulate host plant defense systems and facilitate the invasion of the host plant. These findings provide a further insight into the identification of potential effector proteins involved in soldier fly-sugarcane interactions.
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Affiliation(s)
- Kayvan Etebari
- School of Biological Sciences, The University of Queensland, Brisbane, QLD, Australia
| | | | - Andrew L Ward
- Sugar Research Australia, Indooroopilly, QLD, Australia
| | - Michael J Furlong
- School of Biological Sciences, The University of Queensland, Brisbane, QLD, Australia
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15
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Rispe C, Legeai F, Nabity PD, Fernández R, Arora AK, Baa-Puyoulet P, Banfill CR, Bao L, Barberà M, Bouallègue M, Bretaudeau A, Brisson JA, Calevro F, Capy P, Catrice O, Chertemps T, Couture C, Delière L, Douglas AE, Dufault-Thompson K, Escuer P, Feng H, Forneck A, Gabaldón T, Guigó R, Hilliou F, Hinojosa-Alvarez S, Hsiao YM, Hudaverdian S, Jacquin-Joly E, James EB, Johnston S, Joubard B, Le Goff G, Le Trionnaire G, Librado P, Liu S, Lombaert E, Lu HL, Maïbèche M, Makni M, Marcet-Houben M, Martínez-Torres D, Meslin C, Montagné N, Moran NA, Papura D, Parisot N, Rahbé Y, Lopes MR, Ripoll-Cladellas A, Robin S, Roques C, Roux P, Rozas J, Sánchez-Gracia A, Sánchez-Herrero JF, Santesmasses D, Scatoni I, Serre RF, Tang M, Tian W, Umina PA, van Munster M, Vincent-Monégat C, Wemmer J, Wilson ACC, Zhang Y, Zhao C, Zhao J, Zhao S, Zhou X, Delmotte F, Tagu D. The genome sequence of the grape phylloxera provides insights into the evolution, adaptation, and invasion routes of an iconic pest. BMC Biol 2020; 18:90. [PMID: 32698880 PMCID: PMC7376646 DOI: 10.1186/s12915-020-00820-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 06/22/2020] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Although native to North America, the invasion of the aphid-like grape phylloxera Daktulosphaira vitifoliae across the globe altered the course of grape cultivation. For the past 150 years, viticulture relied on grafting-resistant North American Vitis species as rootstocks, thereby limiting genetic stocks tolerant to other stressors such as pathogens and climate change. Limited understanding of the insect genetics resulted in successive outbreaks across the globe when rootstocks failed. Here we report the 294-Mb genome of D. vitifoliae as a basic tool to understand host plant manipulation, nutritional endosymbiosis, and enhance global viticulture. RESULTS Using a combination of genome, RNA, and population resequencing, we found grape phylloxera showed high duplication rates since its common ancestor with aphids, but similarity in most metabolic genes, despite lacking obligate nutritional symbioses and feeding from parenchyma. Similarly, no enrichment occurred in development genes in relation to viviparity. However, phylloxera evolved > 2700 unique genes that resemble putative effectors and are active during feeding. Population sequencing revealed the global invasion began from the upper Mississippi River in North America, spread to Europe and from there to the rest of the world. CONCLUSIONS The grape phylloxera genome reveals genetic architecture relative to the evolution of nutritional endosymbiosis, viviparity, and herbivory. The extraordinary expansion in effector genes also suggests novel adaptations to plant feeding and how insects induce complex plant phenotypes, for instance galls. Finally, our understanding of the origin of this invasive species and its genome provide genetics resources to alleviate rootstock bottlenecks restricting the advancement of viticulture.
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Affiliation(s)
| | - Fabrice Legeai
- BIPAA, IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
| | - Paul D. Nabity
- Department of Botany and Plant Sciences, University of California, Riverside, USA
| | - Rosa Fernández
- Bioinformatics and Genomics Unit, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Dr. Aiguader, 88, 08003 Barcelona, Spain
- Present address: Institute of Evolutionary Biology (CSIC-UPF), Passeig marítim de la Barceloneta 37-49, 08003 Barcelona, Spain
| | - Arinder K. Arora
- Department of Entomology, Cornell University, Ithaca, NY 14853 USA
| | | | | | | | - Miquel Barberà
- Institut de Biologia Integrativa de Sistemes, Parc Cientific Universitat de Valencia, C/ Catedrático José Beltrán n° 2, 46980 Paterna, València Spain
| | - Maryem Bouallègue
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR01ES05 Biochimie et Biotechnologie, 2092 Tunis, Tunisia
| | - Anthony Bretaudeau
- BIPAA, IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
| | | | - Federica Calevro
- Univ Lyon, INSA-Lyon, INRAE, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Pierre Capy
- Laboratoire Evolution, Génomes, Comportement, Ecologie CNRS, Univ. Paris-Sud, IRD, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Olivier Catrice
- LIPM, Université de Toulouse, INRAE, CNRS, Castanet-Tolosan, France
| | - Thomas Chertemps
- Sorbonne Université, UPEC, Université Paris 7, INRAE, CNRS, IRD, Institute of Ecology and Environmental Sciences, Paris, France
| | - Carole Couture
- SAVE, INRAE, Bordeaux Sciences Agro, Villenave d’Ornon, France
| | - Laurent Delière
- SAVE, INRAE, Bordeaux Sciences Agro, Villenave d’Ornon, France
| | - Angela E. Douglas
- Department of Entomology, Cornell University, Ithaca, NY 14853 USA
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853 USA
| | - Keith Dufault-Thompson
- Department of Cell and Molecular Biology, College of the Environment and Life Sciences, University of Rhode Island, Kingston, RI USA
| | - Paula Escuer
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Honglin Feng
- Department of Biology, University of Miami, Coral Gables, USA
- Current affiliation: Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, USA
| | | | - Toni Gabaldón
- Bioinformatics and Genomics Unit, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Dr. Aiguader, 88, 08003 Barcelona, Spain
- Universitat Pompeu Fabra, 08003 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Roderic Guigó
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Frédérique Hilliou
- Université Côte d’Azur, INRAE, CNRS, Institut Sophia Agrobiotech, Sophia-Antipolis, France
| | - Silvia Hinojosa-Alvarez
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Yi-min Hsiao
- Institute of Biotechnology and Department of Entomology, College of Bioresources and Agriculture, National Taiwan University, Taipei, Taiwan
- Present affiliation: Bone and Joint Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Sylvie Hudaverdian
- IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
| | | | - Edward B. James
- Department of Biology, University of Miami, Coral Gables, FL 33146 USA
| | - Spencer Johnston
- Department of Entomology, Texas A&M University, College Station, TX 77843 USA
| | | | - Gaëlle Le Goff
- Université Côte d’Azur, INRAE, CNRS, Institut Sophia Agrobiotech, Sophia-Antipolis, France
| | - Gaël Le Trionnaire
- IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
| | - Pablo Librado
- Laboratoire d’Anthropobiologie Moléculaire et d’Imagerie de Synthèse, CNRS UMR 5288, Université de Toulouse, Université Paul Sabatier, Toulouse, France
| | - Shanlin Liu
- China National GeneBank-Shenzhen, BGI-Shenzhen, Shenzhen, 518083 Guangdong Province People’s Republic of China
- BGI-Shenzhen, Shenzhen, 518083 Guangdong Province People’s Republic of China
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Eric Lombaert
- Université Côte d’Azur, INRAE, CNRS, ISA, Sophia Antipolis, France
| | - Hsiao-ling Lu
- Department of Post-Modern Agriculture, MingDao University, Changhua, Taiwan
| | - Martine Maïbèche
- Sorbonne Université, UPEC, Université Paris 7, INRAE, CNRS, IRD, Institute of Ecology and Environmental Sciences, Paris, France
| | - Mohamed Makni
- Université de Tunis El Manar, Faculté des Sciences de Tunis, LR01ES05 Biochimie et Biotechnologie, 2092 Tunis, Tunisia
| | - Marina Marcet-Houben
- Bioinformatics and Genomics Unit, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology, Dr. Aiguader, 88, 08003 Barcelona, Spain
| | - David Martínez-Torres
- Institut de Biologia Integrativa de Sistemes, Parc Cientific Universitat de Valencia, C/ Catedrático José Beltrán n° 2, 46980 Paterna, València Spain
| | - Camille Meslin
- INRAE, Institute of Ecology and Environmental Sciences, Versailles, France
| | - Nicolas Montagné
- Sorbonne Université, Institute of Ecology and Environmental Sciences, Paris, France
| | - Nancy A. Moran
- Department of Integrative Biology, University of Texas at Austin, Austin, USA
| | - Daciana Papura
- SAVE, INRAE, Bordeaux Sciences Agro, Villenave d’Ornon, France
| | - Nicolas Parisot
- Univ Lyon, INSA-Lyon, INRAE, BF2I, UMR0203, F-69621, Villeurbanne, France
| | - Yvan Rahbé
- Univ Lyon, INRAE, INSA-Lyon, CNRS, UCBL, UMR5240 MAP, F-69622 Villeurbanne, France
| | | | - Aida Ripoll-Cladellas
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Stéphanie Robin
- BIPAA IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
| | - Céline Roques
- Plateforme Génomique GeT-PlaGe, Centre INRAE de Toulouse Midi-Pyrénées, 24 Chemin de Borde Rouge, Auzeville, CS 52627, 31326 Castanet-Tolosan Cedex, France
| | - Pascale Roux
- SAVE, INRAE, Bordeaux Sciences Agro, Villenave d’Ornon, France
| | - Julio Rozas
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Alejandro Sánchez-Gracia
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Jose F. Sánchez-Herrero
- Departament de Genètica, Microbiologia i Estadística and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, 08028 Barcelona, Spain
| | - Didac Santesmasses
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Division of Genetics, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115 USA
| | | | - Rémy-Félix Serre
- Plateforme Génomique GeT-PlaGe, Centre INRAE de Toulouse Midi-Pyrénées, 24 Chemin de Borde Rouge, Auzeville, CS 52627, 31326 Castanet-Tolosan Cedex, France
| | - Ming Tang
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193 People’s Republic of China
| | - Wenhua Tian
- Department of Botany and Plant Sciences, University of California, Riverside, USA
| | - Paul A. Umina
- School of BioSciences, The University of Melbourne, Parkville, VIC Australia
| | - Manuella van Munster
- BGPI, Université Montpellier, CIRAD, INRAE, Montpellier SupAgro, Montpellier, France
| | | | - Joshua Wemmer
- Department of Botany and Plant Sciences, University of California, Riverside, USA
| | - Alex C. C. Wilson
- Department of Biology, University of Miami, Coral Gables, FL 33146 USA
| | - Ying Zhang
- Department of Cell and Molecular Biology, College of the Environment and Life Sciences, University of Rhode Island, Kingston, RI USA
| | - Chaoyang Zhao
- Department of Botany and Plant Sciences, University of California, Riverside, USA
| | - Jing Zhao
- China National GeneBank-Shenzhen, BGI-Shenzhen, Shenzhen, 518083 Guangdong Province People’s Republic of China
- BGI-Shenzhen, Shenzhen, 518083 Guangdong Province People’s Republic of China
| | - Serena Zhao
- Department of Integrative Biology, University of Texas at Austin, Austin, USA
| | - Xin Zhou
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193 People’s Republic of China
| | | | - Denis Tagu
- IGEPP, Agrocampus Ouest, INRAE, Université de Rennes 1, 35650 Le Rheu, France
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16
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Navarro-Escalante L, Zhao C, Shukle R, Stuart J. BSA-Seq Discovery and Functional Analysis of Candidate Hessian Fly ( Mayetiola destructor) Avirulence Genes. FRONTIERS IN PLANT SCIENCE 2020; 11:956. [PMID: 32670342 PMCID: PMC7330099 DOI: 10.3389/fpls.2020.00956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 06/10/2020] [Indexed: 05/17/2023]
Abstract
The Hessian fly (HF, Mayetiola destructor) is a plant-galling parasite of wheat (Triticum spp.). Seven percent of its genome is composed of highly diversified signal-peptide-encoding genes that are transcribed in HF larval salivary glands. These observations suggest that they encode effector proteins that are injected into wheat cells to suppress basal wheat immunity and redirect wheat development towards gall formation. Genetic mapping has determined that mutations in four of these genes are associated with HF larval survival (virulence) on plants carrying four different resistance (R) genes. Here, this line of investigation was pursued further using bulked-segregant analysis combined with whole genome resequencing (BSA-seq). Virulence to wheat R genes H6, Hdic, and H5 was examined. Mutations associated with H6 virulence had been mapped previously. Therefore, we used H6 to test the capacity of BSA-seq to map virulence using a field-derived HF population. This was the first time a non-structured HF population had been used to map HF virulence. Hdic virulence had not been mapped previously. Using a structured laboratory population, BSA-seq associated Hdic virulence with mutations in two candidate effector-encoding genes. Using a laboratory population, H5 virulence was previously positioned in a region spanning the centromere of HF autosome 2. BSA-seq resolved H5 virulence to a 1.3 Mb fragment on the same chromosome but failed to identify candidate mutations. Map-based candidate effectors were then delivered to Nicotiana plant cells via the type III secretion system of Burkholderia glumae bacteria. These experiments demonstrated that the genes associated with virulence to wheat R genes H6 and H13 are capable of suppressing plant immunity. Results are consistent with the hypothesis that effector proteins underlie the ability of HFs to survive on wheat.
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Affiliation(s)
| | - Chaoyang Zhao
- Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States
| | - Richard Shukle
- USDA-ARS and Department of Entomology, Purdue University, West Lafayette, IN, United States
| | - Jeffrey Stuart
- Department of Entomology, Purdue University, West Lafayette, IN, United States
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17
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Yates-Stewart AD, Daron J, Wijeratne S, Shahid S, Edgington HA, Slotkin RK, Michel A. Soybean aphids adapted to host-plant resistance by down regulating putative effectors and up regulating transposable elements. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2020; 121:103363. [PMID: 32201218 DOI: 10.1016/j.ibmb.2020.103363] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 03/06/2020] [Accepted: 03/15/2020] [Indexed: 06/10/2023]
Abstract
In agricultural systems, crops equipped with host-plant resistance (HPR) have enhanced protection against pests, and are used as a safe and sustainable tool in pest management. In soybean, HPR can control the soybean aphid (Aphis glycines), but certain aphid populations have overcome this resistance (i.e., virulence). The molecular mechanisms underlying aphid virulence to HPR are unknown, but likely involve effector proteins that are secreted by aphids to modulate plant defenses. Another mechanism to facilitate adaptation is through the activity of transposable elements, which can become activated by stress. In this study, we performed RNA sequencing of virulent and avirulent soybean aphids fed susceptible or resistant (Rag1 + Rag2) soybean. Our goal was to better understand the molecular mechanisms underlying soybean aphid virulence. Our data showed that virulent aphids mostly down regulate putative effector genes relative to avirulent aphids, especially when aphids were fed susceptible soybean. Decreased expression of effectors may help evade HPR plant defenses. Virulent aphids also transcriptionally up regulate a diverse set of transposable elements and nearby genes, which is consistent with stress adaptation. Our work demonstrates two mechanisms of pest adaptation to resistance, and identifies effector gene targets for future functional testing.
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Affiliation(s)
| | - Josquin Daron
- CNRS, Centre National de la Recherche Scientifique, Montpellier, France
| | - Saranga Wijeratne
- The Ohio State University, Molecular and Cellular Imaging Center, OARDC, Wooster, OH, USA
| | - Saima Shahid
- Donald Danforth Plant Science Center, St, Louis, MO, USA
| | - Hilary A Edgington
- The Ohio State University, Department of Entomology, CFAES Wooster Campus, Wooster, OH, USA
| | - R Keith Slotkin
- Donald Danforth Plant Science Center, St, Louis, MO, USA; Division of Biological Sciences, University of Missouri, Columbia, MO, USA
| | - Andy Michel
- The Ohio State University, Center for Applied Plant Sciences, Wooster, OH, USA; The Ohio State University, Department of Entomology, CFAES Wooster Campus, Wooster, OH, USA.
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18
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Dong Y, Jing M, Shen D, Wang C, Zhang M, Liang D, Nyawira KT, Xia Q, Zuo K, Wu S, Wu Y, Dou D, Xia A. The mirid bug Apolygus lucorum deploys a glutathione peroxidase as a candidate effector to enhance plant susceptibility. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:2701-2712. [PMID: 31950164 PMCID: PMC7210764 DOI: 10.1093/jxb/eraa015] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 01/15/2020] [Indexed: 05/04/2023]
Abstract
The mirid bug Apolygus lucorum has become a major agricultural pest since the large-scale cultivation of Bt-cotton. It was assumed that A. lucorum, similarly to other phloem sap insects, could secrete saliva that contains effector proteins into plant interfaces to perturb host cellular processes during feeding. However, the secreted effectors of A. lucorum are still uncharacterized and unstudied. In this study, 1878 putative secreted proteins were identified from the transcriptome of A. lucorum, which either had homology with published aphid effectors or shared common features with plant pathogens and insect effectors. One hundred and seventy-two candidate effectors were used for cell death-inducing/suppressing assays, and a putative salivary gland effector, Apolygus lucorum cell death inhibitor 6 (Al6), was characterized. The mRNAs of Al6 were enriched at feeding stages (nymph and adult) and, in particular, in salivary glands. Moreover, we revealed that the secreted Al6 encoded an active glutathione peroxidase that reduced reactive oxygen species (ROS) accumulation induced by INF1 or Flg22. Expression of the Al6 gene in planta altered insect feeding behavior and promoted plant pathogen infections. Inhibition of cell death and enhanced plant susceptibility to insect and pathogens are dependent on glutathione peroxidase activity of Al6. Thus, this study shows that a candidate salivary gland effector, Al6, functions as a glutathione peroxidase and suppresses ROS induced by pathogen-associated molecular pattern to inhibit pattern-triggered immunity (PTI)-induced cell death. The identification and molecular mechanism analysis of the Al6 candidate effector in A. lucorum will provide new insight into the molecular mechanisms of insect-plant interactions.
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Affiliation(s)
| | | | - Danyu Shen
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Chenyang Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Meiqian Zhang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Dong Liang
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Karani T Nyawira
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qingyue Xia
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Kairan Zuo
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Shuwen Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Yidong Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Daolong Dou
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Ai Xia
- College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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19
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Portillo Lemus L, Tricard J, Duclercq J, Coulette Q, Giron D, Hano C, Huguet E, Lamblin F, Cherqui A, Sallé A. Salivary proteins of Phloeomyzus passerinii, a plant-manipulating aphid, and their impact on early gene responses of susceptible and resistant poplar genotypes. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 294:110468. [PMID: 32234233 DOI: 10.1016/j.plantsci.2020.110468] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 03/03/2020] [Accepted: 03/10/2020] [Indexed: 06/11/2023]
Abstract
Successful plant colonization by parasites requires the circumvention of host defenses, and sometimes a reprogramming of host metabolism, mediated by effector molecules delivered into the host. Using transcriptomic and enzymatic approaches, we characterized salivary glands and saliva of Phloeomyzus passerinii, an aphid exhibiting an atypical feeding strategy. Plant responses to salivary extracts of P. passerinii and Myzus persicae were assessed with poplar protoplasts of a susceptible and a resistant genotype, and in a heterologous Arabidopsis system. We predict that P. passerinii secretes a highly peculiar saliva containing effectors potentially interfering with host defenses, biotic stress signaling and plant metabolism, notably phosphatidylinositol phosphate kinases which seemed specific to P. passerinii. Gene expression profiles indicated that salivary extracts of M. persicae markedly affected host defenses and biotic stress signaling, while salivary extracts of P. passerinii induced only weak responses. The effector-triggered susceptibility was characterized by downregulations of genes involved in cytokinin signaling and auxin homeostasis. This suggests that P. passerinii induces an intracellular accumulation of auxin in susceptible host genotypes, which is supported by histochemical assays in Arabidopsis. This might in turn affect biotic stress signaling and contribute to host tissue manipulation by the aphid.
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Affiliation(s)
- Luis Portillo Lemus
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRA, Université d'Orléans, 45067, Orléans, France; Ecologie et Dynamique des Systèmes Anthropisés, EDYSAN UMR CNRS-UPJV 7058, Université de Picardie Jules Verne, Amiens, France
| | - Jessy Tricard
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRA, Université d'Orléans, 45067, Orléans, France; Ecologie et Dynamique des Systèmes Anthropisés, EDYSAN UMR CNRS-UPJV 7058, Université de Picardie Jules Verne, Amiens, France
| | - Jérôme Duclercq
- Ecologie et Dynamique des Systèmes Anthropisés, EDYSAN UMR CNRS-UPJV 7058, Université de Picardie Jules Verne, Amiens, France
| | - Quentin Coulette
- Ecologie et Dynamique des Systèmes Anthropisés, EDYSAN UMR CNRS-UPJV 7058, Université de Picardie Jules Verne, Amiens, France
| | - David Giron
- Institut de Recherche sur la Biologie de l'Insecte, UMR 7261, CNRS/Université François-Rabelais de Tours, Tours, France
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRA, Université d'Orléans, 45067, Orléans, France
| | - Elisabeth Huguet
- Institut de Recherche sur la Biologie de l'Insecte, UMR 7261, CNRS/Université François-Rabelais de Tours, Tours, France
| | - Frédéric Lamblin
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRA, Université d'Orléans, 45067, Orléans, France
| | - Anas Cherqui
- Ecologie et Dynamique des Systèmes Anthropisés, EDYSAN UMR CNRS-UPJV 7058, Université de Picardie Jules Verne, Amiens, France
| | - Aurélien Sallé
- Laboratoire de Biologie des Ligneux et des Grandes Cultures, INRA, Université d'Orléans, 45067, Orléans, France.
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Eitle MW, Carolan JC, Griesser M, Forneck A. The salivary gland proteome of root-galling grape phylloxera (Daktulosphaira vitifoliae Fitch) feeding on Vitis spp. PLoS One 2019; 14:e0225881. [PMID: 31846459 PMCID: PMC6917271 DOI: 10.1371/journal.pone.0225881] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 11/14/2019] [Indexed: 01/17/2023] Open
Abstract
The successful parasitisation of a plant by a phytophagous insect is dependent on the delivery of effector molecules into the host. Sedentary gall forming insects, such as grape phylloxera (Daktulosphaira vitifoliae Fitch, Phylloxeridae), secrete multiple effectors into host plant tissues that alter or modulate the cellular and molecular environment to the benefit of the insect. The identification and characterisation of effector proteins will provide insight into the host-phylloxera interaction specifically the gall-induction processes and potential mechanisms of plant resistance. Using proteomic mass spectrometry and in-silico secretory prediction, 420 putative effectors were determined from the salivary glands or the root-feeding D. vitifoliae larvae reared on Teleki 5C (V. berlandieri x V. riparia). Among them, 170 conserved effectors were shared between D. vitifoliae and fourteen phytophagous insect species. Quantitative RT-PCR analysis of five conserved effector candidates (protein disulfide-isomerase, peroxidoredoxin, peroxidase and a carboxypeptidase) revealed that their gene expression decreased, when larvae were starved for 24 h, supporting their assignment as effector molecules. The D. vitifoliae effectors identified here represent a functionally diverse group, comprising both conserved and unique proteins that provide new insight into the D. vitifoliae-Vitis spp. interaction and the potential mechanisms by which D. vitifoliae establishes the feeding site, suppresses plant defences and modulates nutrient uptake.
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Affiliation(s)
- Markus W. Eitle
- University of Natural Resources and Life Sciences, Department of Crop Sciences, Institute of Viticulture and Pomology, Vienna, Austria
| | - James C. Carolan
- Department of Biology, Maynooth University, Maynooth, Co. Kildare, Ireland
| | - Michaela Griesser
- University of Natural Resources and Life Sciences, Department of Crop Sciences, Institute of Viticulture and Pomology, Vienna, Austria
| | - Astrid Forneck
- University of Natural Resources and Life Sciences, Department of Crop Sciences, Institute of Viticulture and Pomology, Vienna, Austria
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21
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Cai Q, He B, Jin H. A safe ride in extracellular vesicles - small RNA trafficking between plant hosts and pathogens. CURRENT OPINION IN PLANT BIOLOGY 2019; 52:140-148. [PMID: 31654843 DOI: 10.1016/j.pbi.2019.09.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/10/2019] [Accepted: 09/13/2019] [Indexed: 05/20/2023]
Abstract
Communication between plants and pathogens requires the transport of regulatory molecules across cellular boundaries, which is essential for host defense and pathogen virulence. Previous research has largely focused on protein transport, but, which other molecules function in communication, and how they are transported remains under explored. Recent studies discovered that small RNAs (sRNAs) are transported between plants and pathogens, which can silence target genes in the interacting organisms and regulate host immunity and pathogen infection, a mechanism called 'cross-kingdom RNA interference (RNAi)'. Further studies indicate that plant extracellular vesicles (EVs) are essential for sRNA trafficking and host-pathogen communication. This review will focus on the latest advances in our understanding of plant EVs and their roles in transporting regulatory molecules, especially sRNAs, between hosts and pathogens.
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Affiliation(s)
- Qiang Cai
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, CA 92521, USA
| | - Baoye He
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, CA 92521, USA
| | - Hailing Jin
- Department of Microbiology and Plant Pathology, Center for Plant Cell Biology, Institute for Integrative Genome Biology, University of California, Riverside, CA 92521, USA.
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22
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Mech AM, Thomas KA, Marsico TD, Herms DA, Allen CR, Ayres MP, Gandhi KJK, Gurevitch J, Havill NP, Hufbauer RA, Liebhold AM, Raffa KF, Schulz AN, Uden DR, Tobin PC. Evolutionary history predicts high-impact invasions by herbivorous insects. Ecol Evol 2019; 9:12216-12230. [PMID: 31832155 PMCID: PMC6854116 DOI: 10.1002/ece3.5709] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/16/2019] [Accepted: 08/21/2019] [Indexed: 11/06/2022] Open
Abstract
A long-standing goal of invasion biology is to identify factors driving highly variable impacts of non-native species. Although hypotheses exist that emphasize the role of evolutionary history (e.g., enemy release hypothesis & defense-free space hypothesis), predicting the impact of non-native herbivorous insects has eluded scientists for over a century.Using a census of all 58 non-native conifer-specialist insects in North America, we quantified the contribution of over 25 factors that could affect the impact they have on their novel hosts, including insect traits (fecundity, voltinism, native range, etc.), host traits (shade tolerance, growth rate, wood density, etc.), and evolutionary relationships (between native and novel hosts and insects).We discovered that divergence times between native and novel hosts, the shade and drought tolerance of the novel host, and the presence of a coevolved congener on a shared host, were more predictive of impact than the traits of the invading insect. These factors built upon each other to strengthen our ability to predict the risk of a non-native insect becoming invasive. This research is the first to empirically support historically assumed hypotheses about the importance of evolutionary history as a major driver of impact of non-native herbivorous insects.Our novel, integrated model predicts whether a non-native insect not yet present in North America will have a one in 6.5 to a one in 2,858 chance of causing widespread mortality of a conifer species if established (R 2 = 0.91) Synthesis and applications. With this advancement, the risk to other conifer host species and regions can be assessed, and regulatory and pest management efforts can be more efficiently prioritized.
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Affiliation(s)
- Angela M. Mech
- School of Environmental and Forest SciencesUniversity of WashingtonSeattleWashington
| | - Kathryn A. Thomas
- Southwest Biological Science CenterU.S. Geological SurveyTucsonArizona
| | - Travis D. Marsico
- Department of Biological SciencesArkansas State UniversityJonesboroArkansas
| | | | - Craig R. Allen
- Nebraska Cooperative Fish and Wildlife UnitSchool of Natural ResourcesU.S. Geological SurveyUniversity of Nebraska‐LincolnLincolnNebraska
| | - Matthew P. Ayres
- Department of Biological SciencesDartmouth CollegeHanoverNew Hampshire
| | - Kamal J. K. Gandhi
- D.B. Warnell School of Forestry and Natural ResourcesUniversity of GeorgiaAthensGeorgia
| | - Jessica Gurevitch
- Department of Ecology and EvolutionStony Brook UniversityStony BrookNew York
| | | | - Ruth A. Hufbauer
- Department of Bioagricultural Science and Pest ManagementColorado State UniversityFort CollinsColorado
| | | | | | - Ashley N. Schulz
- Department of Biological SciencesArkansas State UniversityJonesboroArkansas
| | - Daniel R. Uden
- Nebraska Cooperative Fish and Wildlife UnitDepartment of Agronomy and HorticultureSchool of Natural ResourcesUniversity of Nebraska‐LincolnLincolnNebraska
| | - Patrick C. Tobin
- School of Environmental and Forest SciencesUniversity of WashingtonSeattleWashington
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Campos-Medina VA, Cotrozzi L, Stuart JJ, Couture JJ. Spectral characterization of wheat functional trait responses to Hessian fly: Mechanisms for trait-based resistance. PLoS One 2019; 14:e0219431. [PMID: 31437174 PMCID: PMC6705800 DOI: 10.1371/journal.pone.0219431] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 06/24/2019] [Indexed: 12/18/2022] Open
Abstract
Insect herbivores can manipulate host plants to inhibit defenses. Insects that induce plant galls are excellent examples of these interactions. The Hessian fly (HF, Mayetiola destructor) is a destructive pest of wheat (Triticum spp.) that occurs in nearly all wheat producing globally. Under compatible interactions (i.e., successful HF establishment), HF larvae alter host tissue physiology and morphology for their benefit, manifesting as the development of plant nutritive tissue that feeds the larva and ceases plant cell division and elongation. Under incompatible interactions (i.e., unsuccessful HF establishment), plants respond to larval feeding by killing the larva, permitting normal plant development. We used reflectance spectroscopy to characterize whole-plant functional trait responses during both compatible and incompatible interactions and related these findings with morphological and gene expression observations from earlier studies. Spectral models successfully characterized wheat foliar traits, with mean goodness of fit statistics of 0.84, 0.85, 0.94, and 0.69 and percent root mean square errors of 22, 10, 6, and 20%, respectively, for nitrogen and carbon concentrations, leaf mass per area, and total phenolic content. We found that larvae capable of generating compatible interactions successfully manipulated host plant chemical and morphological composition to create a more hospitable environment. Incompatible interactions resulted in lower host plant nutritional quality, thicker leaves, and higher phenolic levels. Spectral measurements successfully characterized wheat responses to compatible and incompatible interactions, providing an excellent example of the utility of Spectral phenotyping in quantifying responses of specific plant functional traits associated with insect resistance.
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Affiliation(s)
| | - Lorenzo Cotrozzi
- Department of Entomology, Purdue University, West Lafayette, IN, United States of America
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, United States of America
| | - Jeffrey J. Stuart
- Department of Entomology, Purdue University, West Lafayette, IN, United States of America
| | - John J. Couture
- Department of Entomology, Purdue University, West Lafayette, IN, United States of America
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, United States of America
- Center for Plant Biology, Purdue University, West Lafayette, IN, United States of America
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24
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Nanda S, Wan PJ, Yuan SY, Lai FX, Wang WX, Fu Q. Differential Responses of OsMPKs in IR56 Rice to Two BPH Populations of Different Virulence Levels. Int J Mol Sci 2018; 19:E4030. [PMID: 30551584 PMCID: PMC6320944 DOI: 10.3390/ijms19124030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/27/2018] [Accepted: 12/10/2018] [Indexed: 01/27/2023] Open
Abstract
The conserved mitogen-activated protein kinase (MAPK) cascades play vital roles in plant defense responses against pathogens and insects. In the current study, the expression profiles of 17 OsMPKs were determined in the TN1 and IR56 rice varieties under the infestation of brown planthopper (BPH), one of the most destructive hemimetabolous rice pests. The virulent IR56 BPH population (IR56-BPH) and the avirulent TN1 BPH population (TN-BPH) were used to reveal the roles of OsMPKs in the compatible (IR56-BPH infested on the TN1 and IR56 rice varieties, and TN1-BPH infested on the TN1 rice variety) and the incompatible (TN1-BPH infested on the IR56 rice variety) interaction. The statistical analysis revealed that rice variety, BPH population type, and infestation period have significant effects on the transcription of OsMPKs. Out of these genes, five OsMPKs (OsMPK1, OsMPK3, OsMPK7, OsMPK14, and OsMPK16) were found to exhibit upregulated expression only during incompatible interaction. Six OsMPKs (OsMPK4, OsMPK5, OsMPK8, OsMPK9, OsMPK12, and OsMPK13) were associated with both incompatible and compatible interactions. The transcription analysis of salicylic acid, jasmonic acid, and ethylene phytohormone signaling genes revealed their roles during the rice⁻BPH interactions. The upregulated expression of OsC4H, OsCHS, and OsCHI in the incompatible interaction implied the potential defense regulatory roles of phenylpropanoids. In both varieties, the elevated transcript accumulations of OsGST and OsSOD, and the increased enzyme activities of POD, SOD, and GST at 1 day post-infestation (dpi), but not at 3 dpi, indicated that reactive oxygen species (ROS) signaling might be an early event in rice⁻BPH interactions. Furthermore, upregulated transcription of OsLecRK3 and OsLecRK4 was found only during an incompatible interaction, suggesting their involvement in the BPH resistance response in the IR56 rice variety. Lastly, based on the findings of this study, we have proposed a model of interactions of IR56 rice with TN1-BPH and IR56-BPH that depicts the resistance and susceptibility reactions, respectively.
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Affiliation(s)
- Satyabrata Nanda
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - Pin-Jun Wan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - San-Yue Yuan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - Feng-Xiang Lai
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - Wei-Xia Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
| | - Qiang Fu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China.
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25
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Al-Jbory Z, El-Bouhssini M, Chen MS. Conserved and Unique Putative Effectors Expressed in the Salivary Glands of Three Related Gall Midge Species. JOURNAL OF INSECT SCIENCE (ONLINE) 2018; 18:5139637. [PMID: 30346621 PMCID: PMC6195418 DOI: 10.1093/jisesa/iey094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Indexed: 05/08/2023]
Abstract
Species in the stem gall midge genus Mayetiola (Diptera: Cecidomyiidae) cause serious damage to small grain crops. Among Mayetiola species are Hessian fly (Mayetiola destructor Say), barley midge (Mayetiola hordei Keiffer), and oat midge (Mayetiola avenae Marchal). Larvae of these species inject saliva into host tissues to manipulate plants. To identify putative effectors, transcriptomic analyses were conducted on transcripts encoding secreted salivary gland proteins (SSGPs) from first instar larvae of the barley and oat midges, since SSGPs are the most likely source for effector proteins delivered into host tissues. From barley midge, 178 SSGP-encoding unigenes were identified, which were sorted into 51 groups. From oat midge, 194 were obtained and sorted into 50 groups. Predicted proteins within a group had a highly conserved secretion signal peptide and shared at least 30% amino acid identity. Among the identified unigenes from both barley and oat midges, ~68% are conserved either among the three species or between two of them. Conserved SSGPs included members belonging to SSGP-1, SSGP-4, SSGP-11, and SSGP-71 families. Unconventional conservation patterns exist among family members within a species and among different gall midges, indicating that these genes are under high selection pressure, a characteristic of effector genes. SSGPs that are unique to each species were also identified. Those conserved SSGPs may be responsible for host manipulation since the three gall midges produce identical phenotypic symptoms to host plants, whereas the SSGPs unique to each species may be responsible for different host specificity.
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Affiliation(s)
- Zainab Al-Jbory
- Department of Entomology, Kansas State University, Waters Hall, Manhattan, KS
- College of Agriculture, Green University of Al Qasim, Iraq
| | - Mustapha El-Bouhssini
- International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat BP 6299, Morocco
| | - Ming-Shun Chen
- Department of Entomology, Kansas State University, Waters Hall, Manhattan, KS
- Hard Winter Wheat Genetics Research Unit, USDA-ARS and Department of Entomology, Kansas State University, Manhattan, KS
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26
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Tang G, Liu X, Chen GH, Witworth RJ, Chen MS. Increasing Temperature Reduces Wheat Resistance Mediated by Major Resistance Genes to Mayetiola destructor (Diptera: Cecidomyiidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:1433-1438. [PMID: 29566182 DOI: 10.1093/jee/toy048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Indexed: 06/08/2023]
Abstract
Mayetiola destructor (Say) (Diptera: Cecidomyiidae) is a destructive pest of wheat and is mainly controlled by deploying resistant cultivars. Unfortunately, wheat resistance to Hessian fly is often lost when temperatures rise to a certain level. This study analyzed temperature sensitivity of 20 wheat cultivars that contain different resistance (R) genes. The lowest temperatures at which the percentage of resistant plants fell below 50% in an assay were 18°C for 'D6647 H17' (921680D1-7) (containing the R gene H17), 20°C for 'Redland' (H18), 22°C for '84702B14-1-3-4-3' (H19), 24°C for 'Carol' (H3) and 'Sincape90' (H29), 26°C for 'Erin' (H5), 'Jori 13' (H20), and 'PI59190' (H28), 28°C for 'Joy' (H10), 'KS99WGRC42' (Hdic), 'Karen' (H11), 'Caldwell' (H6), and 'Seneca' (H7H8), 30°C for 'KS85WGRC01' (H22) and 'KS92WGRC20' (H25), 32°C for 'Molly' (H13), and 34°C for 'Iris' (H9). The three cultivars 'H32 Synthetic' (H32), '81602C5-3-3-8-1' (H15), and 'KS93WGRC26' (H26) exhibited the most resistance to temperature increases. The percentages of resistant plants remained above 50% at 36°C for these three cultivars, the highest temperature that can be tested without significantly damaging wheat plant growth. The temperature sensitivity of R gene-mediated fly resistance is also strongly affected by genetic background of wheat cultivars that contain a specific R gene. Our data should provide useful information for breeding wheat resistance to control Hessian fly damage in different regions based on historic temperature data.
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Affiliation(s)
- Guowen Tang
- College of Plant Protection, Yunnan Agricultural University, Kunming, Yunnan Province, China
| | - Xuming Liu
- Department of Entomology, Kansas State University, Manhattan, KS
| | - Guo-Hua Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, Yunnan Province, China
| | - R Jeff Witworth
- Department of Entomology, Kansas State University, Manhattan, KS
| | - Ming-Shun Chen
- Department of Entomology, Kansas State University, Manhattan, KS
- Hard Winter Wheat Genetics Research Unit, Center for Grain and Animal Health, USDA-ARS, Manhattan, KS
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27
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Santamaria ME, Arnaiz A, Gonzalez-Melendi P, Martinez M, Diaz I. Plant Perception and Short-Term Responses to Phytophagous Insects and Mites. Int J Mol Sci 2018; 19:E1356. [PMID: 29751577 PMCID: PMC5983831 DOI: 10.3390/ijms19051356] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/19/2018] [Accepted: 04/25/2018] [Indexed: 12/03/2022] Open
Abstract
Plant⁻pest relationships involve complex processes encompassing a network of molecules, signals, and regulators for overcoming defenses they develop against each other. Phytophagous arthropods identify plants mainly as a source of food. In turn, plants develop a variety of strategies to avoid damage and survive. The success of plant defenses depends on rapid and specific recognition of the phytophagous threat. Subsequently, plants trigger a cascade of short-term responses that eventually result in the production of a wide range of compounds with defense properties. This review deals with the main features involved in the interaction between plants and phytophagous insects and acari, focusing on early responses from the plant side. A general landscape of the diverse strategies employed by plants within the first hours after pest perception to block the capability of phytophagous insects to develop mechanisms of resistance is presented, with the potential of providing alternatives for pest control.
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Affiliation(s)
- M Estrella Santamaria
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Ana Arnaiz
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Pablo Gonzalez-Melendi
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Manuel Martinez
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
| | - Isabel Diaz
- Centro de Biotecnologia y Genomica de Plantas, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Campus Montegancedo, Universidad Politecnica de Madrid (UPM), Pozuelo de Alarcon, 28223 Madrid, Spain.
- Departamento de Biotecnologia-Biologia Vegetal, Escuela Tecnica Superior de Ingenieria Agronomica, Alimentaria y de Biosistemas, UPM, 28040 Madrid, Spain.
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Yates AD, Michel A. Mechanisms of aphid adaptation to host plant resistance. CURRENT OPINION IN INSECT SCIENCE 2018; 26:41-49. [PMID: 29764659 DOI: 10.1016/j.cois.2018.01.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/11/2018] [Accepted: 01/14/2018] [Indexed: 05/27/2023]
Abstract
Host-plant resistant (HPR) crops can play a major role in preventing insect damage, but their durability is limited due to insect adaptation. Research in basal plant resistance provides a framework to investigate adaptation against HPR. Resistance and adaptation are predicted to follow the gene-for-gene and zigzag models of plant defense. These models also highlight the importance of insect effectors, which are small molecules that modulate host plant defense signaling. We highlight research in insect adaptation to plant resistance, and then draw parallels to virulence adaptation. We focus on virulent biotype evolution within the Aphididae, since this group has the highest number of described virulent biotypes. Understanding how virulence occurs will lead to more durable insect management strategies and enhance food production and security.
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Affiliation(s)
- Ashley D Yates
- Center for Applied Plant Sciences, and The Ohio State Center for Soybean Research, USA
| | - Andy Michel
- Center for Applied Plant Sciences, and The Ohio State Center for Soybean Research, USA; Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, 1680 Madison Ave., Wooster, OH, USA.
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29
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Acevedo FE, Peiffer M, Ray S, Meagher R, Luthe DS, Felton GW. Intraspecific differences in plant defense induction by fall armyworm strains. THE NEW PHYTOLOGIST 2018; 218:310-321. [PMID: 29332318 DOI: 10.1111/nph.14981] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 12/05/2017] [Indexed: 05/06/2023]
Abstract
The underlying adaptive mechanisms by which insect strains are associated with specific plants are largely unknown. In this study, we investigated the role of herbivore-induced defenses in the host plant association of fall armyworm (Spodoptera frugiperda) strains. We tested the expression of herbivore-induced defense-related genes and the activity of plant-defensive proteins in maize and Bermuda grass upon feeding by fall armyworm strains. The rice strain caterpillars induced greater accumulation of proteinase inhibitors in maize than the corn strain caterpillars. In Bermuda grass, feeding by the corn strain suppressed induction of trypsin inhibitor activity whereas the rice strain induced greater activity levels. Differences in elicitation of these plant defenses by the two strains seems to be due to differences in the activity levels of the salivary enzyme phospholipase C. The levels of plant defense responses were negatively correlated with caterpillar growth, indicating a fitness effect. Our results indicate that specific elicitors in the saliva of fall armyworm stains trigger differential levels of plant defense responses that affect caterpillar growth and thus may influence host plant associations in field conditions. The composition and secretion of plant defense elicitors may have a strong influence in the host plant association of insect herbivores.
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Affiliation(s)
- Flor E Acevedo
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Michelle Peiffer
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Swayamjit Ray
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA
| | - Robert Meagher
- Center for Medical, Agricultural and Veterinary Entomology, USDA-ARS, Gainesville, FL, 32608, USA
| | - Dawn S Luthe
- Department of Plant Science, Pennsylvania State University, University Park, PA, 16802, USA
| | - Gary W Felton
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA
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30
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Al-jbory Z, Anderson KM, Harris MO, Mittapalli O, Whitworth RJ, Chen MS. Transcriptomic Analyses of Secreted Proteins From the Salivary Glands of
Wheat Midge Larvae. JOURNAL OF INSECT SCIENCE 2018; 18:17. [PMCID: PMC5822882 DOI: 10.1093/jisesa/iey009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Both the wheat midge (Sitodiplosis mosellana) (Géhin) (Diptera:
Cecidomyiidae) and the Hessian fly (Mayetiola destructor) (Say) (Diptera:
Cecidomyiidae) belong to a group of insects called gall midges (Diptera: Cecidomyiidae),
and both are destructive pests of wheat. From Hessian fly larvae, a large number of genes
have been identified to encode secreted salivary gland proteins (SSGPs), which are
presumably critical for the insect to feed on and manipulate host plants. For comparison,
we conducted an analysis on transcripts encoding SSGPs from the first instar larvae of the
wheat midge. In total, 3,500 cDNA clones were sequenced, from which 1,301 high-quality
sequences were obtained. Approximately 25% of the cDNAs with high-quality sequences
encoded SSGPs. The SSGPs were grouped into 97 groups based on sequence homology. Among the
SSGP-encoding transcripts, 206 encoded unique proteins with no sequence similarity to any
known protein and 29 encoded proteins similar to known proteins including proteases,
serpines, thioesterases, ankyrins, and ferritins. Most (~80%) SSGP-encoding genes appear
under strong selection for mutations that generate amino acid changes within the coding
region. Identification and characterization of SSGPs in wheat midge larvae provide a
foundation for future work to reveal molecular mechanisms behind wheat midge–wheat
interactions and the role of these putative effector proteins in insect virulence.
Availability of the SSGP transcripts will also facilitate comparative analyses of insect
effectors from related species.
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Affiliation(s)
- Zainab Al-jbory
- Department of Entomology, Kansas State University, Manhattan, KS
- College of Agriculture, Green University of Al Qasim, Iraq
| | - Kirk M Anderson
- Department of Entomology, North Dakota State University, Fargo, ND
| | - Marion O Harris
- Department of Entomology, North Dakota State University, Fargo, ND
| | | | - R Jeff Whitworth
- Department of Entomology, Kansas State University, Manhattan, KS
| | - Ming-Shun Chen
- Department of Entomology, Kansas State University, Manhattan, KS
- Hard Winter Wheat Genetics Research Unit, USDA–ARS and Department of
Entomology, Kansas State University, Manhattan, KS
- Corresponding author, e-mail:
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Subramanyam S, Shreve JT, Nemacheck JA, Johnson AJ, Schemerhorn B, Shukle RH, Williams CE. Modulation of nonessential amino acid biosynthetic pathways in virulent Hessian fly larvae (Mayetiola destructor), feeding on susceptible host wheat (Triticum aestivum). JOURNAL OF INSECT PHYSIOLOGY 2018; 105:54-63. [PMID: 29336997 DOI: 10.1016/j.jinsphys.2018.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 12/29/2017] [Accepted: 01/06/2018] [Indexed: 05/29/2023]
Abstract
Compatible interactions between wheat (Triticum aestivum), and its dipteran pest Hessian fly (Hf, Mayetiola destructor) result in successful establishment of larval feeding sites rendering the host plant susceptible. Virulent larvae employ an effector-based feeding strategy to reprogram the host physiology resulting in formation of a protein- and sugar-rich nutritive tissue beneficial to developing larvae. Previous studies documented increased levels of nonessential amino acids (NAA; that need not be received through insect diet) in the susceptible wheat in response to larval feeding, suggesting importance of plant-derived NAA in larval nutrition. Here, we investigated the modulation of genes from NAA biosynthetic pathways (NAABP) in virulent Hf larvae. Transcript profiling for 16 NAABP genes, annotated from the recently assembled Hf genome, was carried out in the feeding first-, and second-instars and compared with that of the first-instar neonate (newly hatched, migrating, assumed to be non-feeding) larvae. While Tyr, Gln, Glu, and Pro NAABP genes transcript abundance declined in the feeding instars as compared to the neonates, those for Ala, and Ser increased in the feeding larval instars, despite higher levels of these NAA in the susceptible host plant. Asp, Asn, Gly and Cys NAABP genes exhibited variable expression profiles in the feeding first- and second-instars. Our results indicate that while Hf larvae utilize the plant-derived NAA, de novo synthesis of several NAA may be necessary to: (i) provide larvae with the requisite amount for sustaining growth before nutritive tissue formation and, (ii) overcome any inadequate amounts in the host plant, post-nutritive tissue formation.
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Affiliation(s)
| | - Jacob T Shreve
- Department of Entomology, Purdue University, West Lafayette, IN 47907, United States
| | - Jill A Nemacheck
- USDA-ARS Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, United States
| | - Alisha J Johnson
- USDA-ARS Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, United States
| | - Brandi Schemerhorn
- Department of Entomology, Purdue University, West Lafayette, IN 47907, United States; USDA-ARS Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, United States
| | - Richard H Shukle
- Department of Entomology, Purdue University, West Lafayette, IN 47907, United States; USDA-ARS Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, United States
| | - Christie E Williams
- Department of Agronomy, Purdue University, West Lafayette, IN 47907, United States; USDA-ARS Crop Production and Pest Control Research Unit, West Lafayette, IN 47907, United States
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Yin L, An Y, Qu J, Li X, Zhang Y, Dry I, Wu H, Lu J. Genome sequence of Plasmopara viticola and insight into the pathogenic mechanism. Sci Rep 2017; 7:46553. [PMID: 28417959 PMCID: PMC5394536 DOI: 10.1038/srep46553] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 03/22/2017] [Indexed: 12/17/2022] Open
Abstract
Plasmopara viticola causes downy mildew disease of grapevine which is one of the most devastating diseases of viticulture worldwide. Here we report a 101.3 Mb whole genome sequence of P. viticola isolate 'JL-7-2' obtained by a combination of Illumina and PacBio sequencing technologies. The P. viticola genome contains 17,014 putative protein-coding genes and has ~26% repetitive sequences. A total of 1,301 putative secreted proteins, including 100 putative RXLR effectors and 90 CRN effectors were identified in this genome. In the secretome, 261 potential pathogenicity genes and 95 carbohydrate-active enzymes were predicted. Transcriptional analysis revealed that most of the RXLR effectors, pathogenicity genes and carbohydrate-active enzymes were significantly up-regulated during infection. Comparative genomic analysis revealed that P. viticola evolved independently from the Arabidopsis downy mildew pathogen Hyaloperonospora arabidopsidis. The availability of the P. viticola genome provides a valuable resource not only for comparative genomic analysis and evolutionary studies among oomycetes, but also enhance our knowledge on the mechanism of interactions between this biotrophic pathogen and its host.
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Affiliation(s)
- Ling Yin
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Yunhe An
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Beijing Center for Physical and Chemical Analysis, Beijing 100089, China
| | - Junjie Qu
- Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning 530007, China
| | - Xinlong Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yali Zhang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Ian Dry
- CSIRO Agriculture & Food, Wine Innovation West Building, Hartley Grove, Urrbrae, SA 5064, Australia
| | - Huijuan Wu
- Beijing Center for Physical and Chemical Analysis, Beijing 100089, China
| | - Jiang Lu
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
- Center for Viticulture and Enology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200024, China
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Dalio RJD, Magalhães DM, Rodrigues CM, Arena GD, Oliveira TS, Souza-Neto RR, Picchi SC, Martins PMM, Santos PJC, Maximo HJ, Pacheco IS, De Souza AA, Machado MA. PAMPs, PRRs, effectors and R-genes associated with citrus-pathogen interactions. ANNALS OF BOTANY 2017; 119:749-774. [PMID: 28065920 PMCID: PMC5571375 DOI: 10.1093/aob/mcw238] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Revised: 07/08/2016] [Accepted: 10/22/2016] [Indexed: 05/08/2023]
Abstract
BACKGROUND Recent application of molecular-based technologies has considerably advanced our understanding of complex processes in plant-pathogen interactions and their key components such as PAMPs, PRRs, effectors and R-genes. To develop novel control strategies for disease prevention in citrus, it is essential to expand and consolidate our knowledge of the molecular interaction of citrus plants with their pathogens. SCOPE This review provides an overview of our understanding of citrus plant immunity, focusing on the molecular mechanisms involved in the interactions with viruses, bacteria, fungi, oomycetes and vectors related to the following diseases: tristeza, psorosis, citrus variegated chlorosis, citrus canker, huanglongbing, brown spot, post-bloom, anthracnose, gummosis and citrus root rot.
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Affiliation(s)
- Ronaldo J. D. Dalio
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Diogo M. Magalhães
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Carolina M. Rodrigues
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Gabriella D. Arena
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Tiago S. Oliveira
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Reinaldo R. Souza-Neto
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Simone C. Picchi
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Paula M. M. Martins
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Paulo J. C. Santos
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Heros J. Maximo
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Inaiara S. Pacheco
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Alessandra A. De Souza
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
| | - Marcos A. Machado
- Citrus Biotechnology Lab, Centro de Citricultura Sylvio Moreira, IAC, Cordeirópolis-SP, Brazil
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Sinha DK, Atray I, Agarrwal R, Bentur JS, Nair S. Genomics of the Asian rice gall midge and its interactions with rice. CURRENT OPINION IN INSECT SCIENCE 2017; 19:76-81. [PMID: 28521946 DOI: 10.1016/j.cois.2017.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 10/04/2016] [Accepted: 03/13/2017] [Indexed: 05/28/2023]
Abstract
Understanding virulence and manipulative strategies of gall formers will reveal new facets of plant defense and insect counter defense. Among the gall midges, the Asian rice gall midge (AGM) has emerged as a model for studies on plant-insect interactions. Data from several genomics, transcriptomics and metabolomics studies have revealed diverse strategies adopted by AGM to successfully invade the host while overcoming its defense. Adaptive skills of AGM transcend from its genomic and transcriptomic make-up. Information arising from studies on genetics, mitochondrial genome and miRNAs, amongst other parameters, highlights AGM's capacity to maneuver the host defense, reorient host metabolome and redirect its morphogenesis.
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Affiliation(s)
- Deepak Kumar Sinha
- Plant-Insect Interaction Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India
| | - Isha Atray
- Plant-Insect Interaction Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India
| | - Ruchi Agarrwal
- Plant-Insect Interaction Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India
| | | | - Suresh Nair
- Plant-Insect Interaction Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India.
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Jing S, Zhao Y, Du B, Chen R, Zhu L, He G. Genomics of interaction between the brown planthopper and rice. CURRENT OPINION IN INSECT SCIENCE 2017; 19:82-87. [PMID: 28521948 DOI: 10.1016/j.cois.2017.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/13/2017] [Indexed: 05/12/2023]
Abstract
Rice (Oryza sativa L.) and the brown planthopper (Nilaparvata lugens (Stål)) form a model system for dissection of the mechanism of interaction between insect pest and crop. In this review, we focus on the genomics of BPH-rice interaction. On the side of rice, a number of BPH-resistance genes have been identified genetically. Thirteen of these genes have been cloned which shed a light on the molecular basis of the interaction. On the aspect of BPH, a lot of salivary proteins have been identified using transcriptome and proteome techniques. The genetic loci of virulence were mapped in BPH genome based on the linkage map. The understanding of interaction between BPH and rice will provide novel insights into efficient control of this pest.
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Affiliation(s)
- Shengli Jing
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China; Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, College of Life Science, Xinyang Normal University, Xinyang 464000, China
| | - Yan Zhao
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China
| | - Bo Du
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China
| | - Rongzhi Chen
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China
| | - Lili Zhu
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China
| | - Guangcun He
- National Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan 430072, China.
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36
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Jonckheere W, Dermauw W, Zhurov V, Wybouw N, Van den Bulcke J, Villarroel CA, Greenhalgh R, Grbić M, Schuurink RC, Tirry L, Baggerman G, Clark RM, Kant MR, Vanholme B, Menschaert G, Van Leeuwen T. The Salivary Protein Repertoire of the Polyphagous Spider Mite Tetranychus urticae: A Quest for Effectors. Mol Cell Proteomics 2016; 15:3594-3613. [PMID: 27703040 PMCID: PMC5141274 DOI: 10.1074/mcp.m116.058081] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 08/11/2016] [Indexed: 11/06/2022] Open
Abstract
The two-spotted spider mite Tetranychus urticae is an extremely polyphagous crop pest. Alongside an unparalleled detoxification potential for plant secondary metabolites, it has recently been shown that spider mites can attenuate or even suppress plant defenses. Salivary constituents, notably effectors, have been proposed to play an important role in manipulating plant defenses and might determine the outcome of plant-mite interactions. Here, the proteomic composition of saliva from T. urticae lines adapted to various host plants-bean, maize, soy, and tomato-was analyzed using a custom-developed feeding assay coupled with nano-LC tandem mass spectrometry. About 90 putative T. urticae salivary proteins were identified. Many are of unknown function, and in numerous cases belonging to multimembered gene families. RNAseq expression analysis revealed that many genes coding for these salivary proteins were highly expressed in the proterosoma, the mite body region that includes the salivary glands. A subset of genes encoding putative salivary proteins was selected for whole-mount in situ hybridization, and were found to be expressed in the anterior and dorsal podocephalic glands. Strikingly, host plant dependent expression was evident for putative salivary proteins, and was further studied in detail by micro-array based genome-wide expression profiling. This meta-analysis revealed for the first time the salivary protein repertoire of a phytophagous chelicerate. The availability of this salivary proteome will assist in unraveling the molecular interface between phytophagous mites and their host plants, and may ultimately facilitate the development of mite-resistant crops. Furthermore, the technique used in this study is a time- and resource-efficient method to examine the salivary protein composition of other small arthropods for which saliva or salivary glands cannot be isolated easily.
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Affiliation(s)
- Wim Jonckheere
- From the ‡Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium
- §Department of Evolutionary Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
| | - Wannes Dermauw
- From the ‡Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium;
| | - Vladimir Zhurov
- ¶Department of Biology, The University of Western Ontario, London, ON, Canada N6A5B7
| | - Nicky Wybouw
- §Department of Evolutionary Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
| | - Jan Van den Bulcke
- ‖UGCT - Woodlab-UGent, Department of Forest and Water Management, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium
| | - Carlos A Villarroel
- **Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
- ‡‡Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
| | - Robert Greenhalgh
- §§Department of Biology, University of Utah, Salt Lake City 257 South 1400 East Utah 84112
| | - Mike Grbić
- ¶Department of Biology, The University of Western Ontario, London, ON, Canada N6A5B7
- ¶¶Instituto de Ciencias de la Vid y el Vino, 26006 Logrono, Spain
| | - Rob C Schuurink
- **Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
| | - Luc Tirry
- From the ‡Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium
| | - Geert Baggerman
- ‖‖Center for Proteomics (CFP), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium
| | - Richard M Clark
- §§Department of Biology, University of Utah, Salt Lake City 257 South 1400 East Utah 84112
- Center for Cell and Genome Science, University of Utah, Salt Lake City 257 South 1400 East Utah 84122
| | - Merijn R Kant
- ‡‡Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
| | - Bartel Vanholme
- Department of Plant Systems Biology, VIB, B-9052 Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Gent, Belgium
| | - Gerben Menschaert
- Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Coupure links 653, 9000 Gent, Belgium
| | - Thomas Van Leeuwen
- From the ‡Laboratory of Agrozoology, Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Gent, Belgium;
- §Department of Evolutionary Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, the Netherlands
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Oates CN, Denby KJ, Myburg AA, Slippers B, Naidoo S. Insect Gallers and Their Plant Hosts: From Omics Data to Systems Biology. Int J Mol Sci 2016; 17:E1891. [PMID: 27869732 PMCID: PMC5133890 DOI: 10.3390/ijms17111891] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 10/28/2016] [Accepted: 11/04/2016] [Indexed: 12/30/2022] Open
Abstract
Gall-inducing insects are capable of exerting a high level of control over their hosts' cellular machinery to the extent that the plant's development, metabolism, chemistry, and physiology are all altered in favour of the insect. Many gallers are devastating pests in global agriculture and the limited understanding of their relationship with their hosts prevents the development of robust management strategies. Omics technologies are proving to be important tools in elucidating the mechanisms involved in the interaction as they facilitate analysis of plant hosts and insect effectors for which little or no prior knowledge exists. In this review, we examine the mechanisms behind insect gall development using evidence from omics-level approaches. The secretion of effector proteins and induced phytohormonal imbalances are highlighted as likely mechanisms involved in gall development. However, understanding how these components function within the system is far from complete and a number of questions need to be answered before this information can be used in the development of strategies to engineer or breed plants with enhanced resistance.
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Affiliation(s)
- Caryn N Oates
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private Bag x20, Pretoria 0028, South Africa.
| | - Katherine J Denby
- Department of Biology, University of York, Wentworth Way, York YO10 5DD, UK.
| | - Alexander A Myburg
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private Bag x20, Pretoria 0028, South Africa.
| | - Bernard Slippers
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private Bag x20, Pretoria 0028, South Africa.
| | - Sanushka Naidoo
- Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), Genomics Research Institute (GRI), University of Pretoria, Private Bag x20, Pretoria 0028, South Africa.
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38
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Nabity PD. Insect-induced plant phenotypes: Revealing mechanisms through comparative genomics of galling insects and their hosts. AMERICAN JOURNAL OF BOTANY 2016; 103:979-81. [PMID: 27257007 DOI: 10.3732/ajb.1600111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 04/29/2016] [Indexed: 05/04/2023]
Affiliation(s)
- Paul D Nabity
- Department of Entomology, Washington State University, P. O. Box 646382, Pullman, Washington 99164 USA
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39
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Trapero C, Wilson IW, Stiller WN, Wilson LJ. Enhancing Integrated Pest Management in GM Cotton Systems Using Host Plant Resistance. FRONTIERS IN PLANT SCIENCE 2016; 7:500. [PMID: 27148323 PMCID: PMC4840675 DOI: 10.3389/fpls.2016.00500] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/29/2016] [Indexed: 05/12/2023]
Abstract
Cotton has lost many ancestral defensive traits against key invertebrate pests. This is suggested by the levels of resistance to some pests found in wild cotton genotypes as well as in cultivated landraces and is a result of domestication and a long history of targeted breeding for yield and fiber quality, along with the capacity to control pests with pesticides. Genetic modification (GM) allowed integration of toxins from a bacteria into cotton to control key Lepidopteran pests. Since the mid-1990s, use of GM cotton cultivars has greatly reduced the amount of pesticides used in many cotton systems. However, pests not controlled by the GM traits have usually emerged as problems, especially the sucking bug complex. Control of this complex with pesticides often causes a reduction in beneficial invertebrate populations, allowing other secondary pests to increase rapidly and require control. Control of both sucking bug complex and secondary pests is problematic due to the cost of pesticides and/or high risk of selecting for pesticide resistance. Deployment of host plant resistance (HPR) provides an opportunity to manage these issues in GM cotton systems. Cotton cultivars resistant to the sucking bug complex and/or secondary pests would require fewer pesticide applications, reducing costs and risks to beneficial invertebrate populations and pesticide resistance. Incorporation of HPR traits into elite cotton cultivars with high yield and fiber quality offers the potential to further reduce pesticide use and increase the durability of pest management in GM cotton systems. We review the challenges that the identification and use of HPR against invertebrate pests brings to cotton breeding. We explore sources of resistance to the sucking bug complex and secondary pests, the mechanisms that control them and the approaches to incorporate these defense traits to commercial cultivars.
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40
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Villarroel CA, Jonckheere W, Alba JM, Glas JJ, Dermauw W, Haring MA, Van Leeuwen T, Schuurink RC, Kant MR. Salivary proteins of spider mites suppress defenses in Nicotiana benthamiana and promote mite reproduction. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 86:119-31. [PMID: 26946468 DOI: 10.1111/tpj.13152] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 01/29/2016] [Accepted: 02/19/2016] [Indexed: 05/03/2023]
Abstract
Spider mites (Tetranychidae sp.) are widely occurring arthropod pests on cultivated plants. Feeding by the two-spotted spider mite T. urticae, a generalist herbivore, induces a defense response in plants that mainly depends on the phytohormones jasmonic acid and salicylic acid (SA). On tomato (Solanum lycopersicum), however, certain genotypes of T. urticae and the specialist species T. evansi were found to suppress these defenses. This phenomenon occurs downstream of phytohormone accumulation via an unknown mechanism. We investigated if spider mites possess effector-like proteins in their saliva that can account for this defense suppression. First we performed an in silico prediction of the T. urticae and the T. evansi secretomes, and subsequently generated a short list of candidate effectors based on additional selection criteria such as life stage-specific expression and salivary gland expression via whole mount in situ hybridization. We picked the top five most promising protein families and then expressed representatives in Nicotiana benthamiana using Agrobacterium tumefaciens transient expression assays to assess their effect on plant defenses. Four proteins from two families suppressed defenses downstream of the phytohormone SA. Furthermore, T. urticae performance on N. benthamiana improved in response to transient expression of three of these proteins and this improvement was similar to that of mites feeding on the tomato SA accumulation mutant nahG. Our results suggest that both generalist and specialist plant-eating mite species are sensitive to SA defenses but secrete proteins via their saliva to reduce the negative effects of these defenses.
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Affiliation(s)
- Carlos A Villarroel
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, P.O. Box 94215, 1090 GE, Amsterdam, The Netherlands
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Wim Jonckheere
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Juan M Alba
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Joris J Glas
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Wannes Dermauw
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium
| | - Michel A Haring
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, P.O. Box 94215, 1090 GE, Amsterdam, The Netherlands
| | - Thomas Van Leeuwen
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
- Department of Crop Protection, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium
| | - Robert C Schuurink
- Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, P.O. Box 94215, 1090 GE, Amsterdam, The Netherlands
| | - Merijn R Kant
- Department of Population Biology, Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
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41
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Kaloshian I, Walling LL. Hemipteran and dipteran pests: Effectors and plant host immune regulators. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2016; 58:350-61. [PMID: 26467026 DOI: 10.1111/jipb.12438] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 10/09/2015] [Indexed: 05/08/2023]
Abstract
Hemipteran and dipteran insects have behavioral, cellular and chemical strategies for evading or coping with the host plant defenses making these insects particularly destructive pests worldwide. A critical component of a host plant's defense to herbivory is innate immunity. Here we review the status of our understanding of the receptors that contribute to perception of hemipteran and dipteran pests and highlight the gaps in our knowledge in these early events in immune signaling. We also highlight recent advances in identification of the effectors that activate pattern-triggered immunity and those involved in effector-triggered immunity.
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Affiliation(s)
- Isgouhi Kaloshian
- Institute of Integrative Genome Biology and Center for Plant Cell Biology, University of California, Riverside, California 92521, USA
- Department of Nematology, University of California, Riverside, California 92521, USA
| | - Linda L Walling
- Institute of Integrative Genome Biology and Center for Plant Cell Biology, University of California, Riverside, California 92521, USA
- Department of Botany and Plant Sciences, University of California, Riverside, California 92521, USA
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Larval growth rate is associated with the composition of the gut microbiota in the Glanville fritillary butterfly. Oecologia 2016; 181:895-903. [DOI: 10.1007/s00442-016-3603-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 03/06/2016] [Indexed: 01/20/2023]
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Sonah H, Deshmukh RK, Bélanger RR. Computational Prediction of Effector Proteins in Fungi: Opportunities and Challenges. FRONTIERS IN PLANT SCIENCE 2016; 7:126. [PMID: 26904083 PMCID: PMC4751359 DOI: 10.3389/fpls.2016.00126] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 01/23/2016] [Indexed: 05/20/2023]
Abstract
Effector proteins are mostly secretory proteins that stimulate plant infection by manipulating the host response. Identifying fungal effector proteins and understanding their function is of great importance in efforts to curb losses to plant diseases. Recent advances in high-throughput sequencing technologies have facilitated the availability of several fungal genomes and 1000s of transcriptomes. As a result, the growing amount of genomic information has provided great opportunities to identify putative effector proteins in different fungal species. There is little consensus over the annotation and functionality of effector proteins, and mostly small secretory proteins are considered as effector proteins, a concept that tends to overestimate the number of proteins involved in a plant-pathogen interaction. With the characterization of Avr genes, criteria for computational prediction of effector proteins are becoming more efficient. There are 100s of tools available for the identification of conserved motifs, signature sequences and structural features in the proteins. Many pipelines and online servers, which combine several tools, are made available to perform genome-wide identification of effector proteins. In this review, available tools and pipelines, their strength and limitations for effective identification of fungal effector proteins are discussed. We also present an exhaustive list of classically secreted proteins along with their key conserved motifs found in 12 common plant pathogens (11 fungi and one oomycete) through an analytical pipeline.
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Affiliation(s)
| | | | - Richard R. Bélanger
- Département de Phytologie, Faculté des Sciences de l’Agriculture et de l’Alimentation, Centre de Recherche en Horticulture, Université Laval, QuébecQC, Canada
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Zinkgraf MS, Meneses N, Whitham TG, Allan GJ. Genetic variation in NIN1 and C/VIF1 genes is significantly associated with Populus angustifolia resistance to a galling herbivore, Pemphigus betae. JOURNAL OF INSECT PHYSIOLOGY 2016; 84:50-59. [PMID: 26518288 DOI: 10.1016/j.jinsphys.2015.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 10/23/2015] [Accepted: 10/24/2015] [Indexed: 06/05/2023]
Abstract
The identification of genes associated with ecologically important traits provides information on the potential genetic mechanisms underlying the responses of an organism to its natural environment. In this study, we investigated the genetic basis of host plant resistance to the gall-inducing aphid, Pemphigus betae, in a natural population of 154 narrowleaf cottonwoods (Populus angustifolia). We surveyed genetic variation in two genes putatively involved in sink-source relations and a phenology gene that co-located in a previously identified quantitative trait locus for resistance to galling. Using a candidate gene approach, three major findings emerged. First, natural variation in tree resistance to galling was repeatable. Sampling of the same tree genotypes 20 years after the initial survey in 1986 show that 80% of the variation in resistance was due to genetic differences among individuals. Second, we identified significant associations at the single nucleotide polymorphism and haplotype levels between the plant neutral invertase gene NIN1 and tree resistance. Invertases are a class of sucrose hydrolyzing enzymes and play an important role in plant responses to biotic stress, including the establishment of nutrient sinks. These associations with NIN1 were driven by a single nucleotide polymorphism (NIN1_664) located in the second intron of the gene and in an orthologous sequence to two known regulatory elements. Third, haplotypes from an inhibitor of invertase (C/VIF1) were significantly associated with tree resistance. The identification of genetic variation in these two genes provides a starting point to understand the possible genetic mechanisms that contribute to tree resistance to gall formation. We also build on previous work demonstrating that genetic differences in sink-source relationships of the host influence the ability of P. betae to manipulate the flow of nutrients and induce a nutrient sink.
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Affiliation(s)
- Matthew S Zinkgraf
- Department of Biological Sciences, Environmental Genetics and Genomics Laboratory (EnGGen), Northern Arizona University, Flagstaff, AZ 86011, USA.
| | - Nashelly Meneses
- Department of Biological Sciences, Environmental Genetics and Genomics Laboratory (EnGGen), Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Thomas G Whitham
- Department of Biological Sciences, Environmental Genetics and Genomics Laboratory (EnGGen), Northern Arizona University, Flagstaff, AZ 86011, USA; Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Gerard J Allan
- Department of Biological Sciences, Environmental Genetics and Genomics Laboratory (EnGGen), Northern Arizona University, Flagstaff, AZ 86011, USA; Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86011, USA
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Acevedo FE, Rivera-Vega LJ, Chung SH, Ray S, Felton GW. Cues from chewing insects - the intersection of DAMPs, HAMPs, MAMPs and effectors. CURRENT OPINION IN PLANT BIOLOGY 2015; 26:80-6. [PMID: 26123394 DOI: 10.1016/j.pbi.2015.05.029] [Citation(s) in RCA: 128] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 05/22/2015] [Accepted: 05/22/2015] [Indexed: 05/04/2023]
Abstract
Chewing herbivores cause massive damage when crushing plant tissues with their mandibles, thus releasing a vast array of cues that may be perceived by the plant to mobilize defenses. Besides releasing damage cues in wounded tissues, herbivores deposit abundant cues from their saliva, regurgitant and feces that trigger herbivore specific responses in plants. Herbivores can manipulate the perception mechanisms and defense signals to suppress plant defenses by secreting effectors and/or by exploiting their associated oral microbes. Recent studies indicate that both the composition of herbivore cues and the plant's ability to recognize them are highly dependent upon the specific plant-herbivore system. There is a growing amount of work on identifying herbivore elicitors and effectors, but the most significant bottleneck in the discipline is the identification and characterization of plant receptors that perceive these herbivore-specific cues.
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Affiliation(s)
- Flor E Acevedo
- Department of Entomology, Penn State University, University Park, PA 16802, USA
| | - Loren J Rivera-Vega
- Department of Entomology, Penn State University, University Park, PA 16802, USA
| | - Seung Ho Chung
- Department of Entomology, Cornell University, Ithaca, NY 14850, USA
| | - Swayamjit Ray
- Department of Plant Science, Plant Biology Graduate Program, Penn State University, University Park, PA 16802, USA
| | - Gary W Felton
- Department of Entomology, Penn State University, University Park, PA 16802, USA.
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