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Pierro R, Moussa A, Mori N, Marcone C, Quaglino F, Romanazzi G. Bois noir management in vineyard: a review on effective and promising control strategies. Front Plant Sci 2024; 15:1364241. [PMID: 38601314 PMCID: PMC11004249 DOI: 10.3389/fpls.2024.1364241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 03/07/2024] [Indexed: 04/12/2024]
Abstract
Among grapevine yellows, Bois noir (BN), associated with 'Candidatus Phytoplasma solani', represents the biggest threat in the main wine-growing areas worldwide, causing significant losses in berry quality and yields. BN epidemiology involves multiple plant hosts and several insect vectors, making considerably complex the development of effective management strategies. Since application of insecticides on the grapevine canopy is not effective to manage vectors, BN management includes an integrated approach based on treatments to the canopy to make the plant more resistant to the pathogen and/or inhibit the vector feeding, and actions on reservoir plants to reduce possibilities that the vector reaches the grapevine and transmit the phytoplasma. Innovative sustainable strategies developed in the last twenty years to improve the BN management are reviewed and discussed.
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Affiliation(s)
- Roberto Pierro
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Abdelhameed Moussa
- Pests and Plant Protection Department, Agricultural & Biological Research Institute, National Research Centre, Cairo, Egypt
| | - Nicola Mori
- Department of Biotechnology, University of Verona, Verona, Italy
| | - Carmine Marcone
- Department of Pharmacy, University of Salerno, Fisciano, Salerno, Italy
| | - Fabio Quaglino
- Department of Agricultural and Environmental Sciences – Production, Landscape, Agroenergy, University of Milan, Milan, Italy
| | - Gianfranco Romanazzi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
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Reis LAM, Pampolha ABO, Dias DD, Santos MM, Pantoja JADS, Araújo PADS, da Silva FS, do Nascimento BLS, Carvalho VL, da Silva EVP, Nunes Neto JP. Ilheus Virus (ILHV) Resistance in Culex quinquefasciatus from the Northern Region of Brazil. Life (Basel) 2024; 14:427. [PMID: 38672699 PMCID: PMC11051376 DOI: 10.3390/life14040427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/04/2023] [Accepted: 12/26/2023] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Orthoflavivirus ilheusense (ILHV) is a member of the Flaviviridae family. It was first isolated in 1944 from pools of Aedes serratus and Psorophora ferox mosquitoes; however, it has also been detected in species of the genus Culex, such as Cx. portesi and Cx. coronator. The objective of this study was to examine the vector competence of Cx. quinquefasciatus mosquitoes to ILHV infection and the subsequent transmission of the virus through their saliva during feeding on blood. METHODS F1 generation females of Cx. quinquefasciatus (Ananindeua/PA) were orally infected with goose blood infected with strain BeH7445, and body, head and saliva samples were analyzed at 7, 14, and 21 dpi using the techniques of virus isolation in cells and indirect immunofluorescence. RESULTS The presence of ILHV was not detected in the body and head samples of Cx. quinquefasciatus females at any of the three dpi's analyzed, indicating that the lineage of mosquitoes analyzed was resistant to ILHV. CONCLUSIONS According to the results obtained in this study, the species Cx. quinquefasciatus proved resistant to ILHV, regardless of the virus titers to which it was exposed, which suggests the possibility that this species does not act as a vector in the ILHV transmission cycle.
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Affiliation(s)
- Lúcia Aline Moura Reis
- Graduate Program in Parasitary Biology in the Amazon Region, Center of Biological and Health Sciences, State University of Pará, Belém 66095-663, Brazil
| | - Ana Beatriz Oliveira Pampolha
- Institute of Biological Sciences, Faculty of Biological Sciences, Federal University of Pará (UFPA), Belém 66075-110, Brazil
| | - Daniel Damous Dias
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Maissa Maia Santos
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Jamilla Augusta de Sousa Pantoja
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Pedro Arthur da Silva Araújo
- Graduate Program in Biology of Infectious and Parasitary Agents, Institute of Biological Sciences, Federal University of Pará (UFPA), Belém 66077-830, Brazil
| | - Fábio Silva da Silva
- Graduate Program in Parasitary Biology in the Amazon Region, Center of Biological and Health Sciences, State University of Pará, Belém 66095-663, Brazil
| | - Bruna Lais Sena do Nascimento
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Valéria Lima Carvalho
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Eliana Vieira Pinto da Silva
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
| | - Joaquim Pinto Nunes Neto
- Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute—IEC/MS/SVSA, Ananindeua 67030-000, Brazil (E.V.P.d.S.)
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Brochu AS, Dionne A, Fall ML, Pérez-López E. A Decade of Hidden Phytoplasmas Unveiled Through Citizen Science. Plant Dis 2023; 107:3389-3393. [PMID: 37227441 DOI: 10.1094/pdis-02-23-0227-sc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Climate change is impacting agriculture in many ways, and a contribution from all is required to reduce the imminent losses related to it. Recently, it has been shown that citizen science could be a way to trace the impact of climate change. However, how can citizen science be applied in plant pathology? Here, using as an example a decade of phytoplasma-related diseases reported by growers, agronomists, and citizens in general, and confirmed by a government laboratory, we explored how to better value plant pathogen monitoring data. Through this collaboration, we found that in the last decade, 34 hosts have been affected by phytoplasmas; 9, 13, and 5 of these plants were, for the first time, reported phytoplasma hosts in eastern Canada, all of Canada, and worldwide, respectively. Another finding of great impact is the first report of a 'Candidatus Phytoplasma phoenicium'-related strain in Canada, while 'Ca. P. pruni' and 'Ca. P. pyri' were reported for the first time in eastern Canada. These findings will have a great impact on the management of phytoplasmas and their insect vectors. Using these insect-vectored bacterial pathogens, we show the need for new strategies that can allow fast and accurate communication between concerned citizens and those institutions confirming their observations.[Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Anne-Sophie Brochu
- Départment de phytologie, Faculté Des sciences de l'agriculture et de l'alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et D'innovation Sur Les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et Des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
| | - Antoine Dionne
- Laboratoire D'expertise et de Diagnostic en Phytoprotection, MAPAQ, Quebec City, Quebec, Canada
| | - Mamadou Lamine Fall
- Saint-Jean-Sur-Richelieu Research and Development Centre, AAFC, Saint-Jean-sur-Richelieu, Quebec, Canada
| | - Edel Pérez-López
- Départment de phytologie, Faculté Des sciences de l'agriculture et de l'alimentation, Université Laval, Quebec City, Quebec, Canada
- Centre de Recherche et D'innovation Sur Les Végétaux (CRIV), Université Laval, Quebec City, Quebec, Canada
- Institute de Biologie Intégrative et Des Systèmes (IBIS), Université Laval, Quebec City, Quebec, Canada
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Garrigós M, Garrido M, Panisse G, Veiga J, Martínez-de la Puente J. Interactions between West Nile Virus and the Microbiota of Culex pipiens Vectors: A Literature Review. Pathogens 2023; 12:1287. [PMID: 38003752 PMCID: PMC10675824 DOI: 10.3390/pathogens12111287] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/21/2023] [Accepted: 10/25/2023] [Indexed: 11/26/2023] Open
Abstract
The flavivirus West Nile virus (WNV) naturally circulates between mosquitoes and birds, potentially affecting humans and horses. Different species of mosquitoes play a role as vectors of WNV, with those of the Culex pipiens complex being particularly crucial for its circulation. Different biotic and abiotic factors determine the capacity of mosquitoes for pathogen transmission, with the mosquito gut microbiota being recognized as an important one. Here, we review the published studies on the interactions between the microbiota of the Culex pipiens complex and WNV infections in mosquitoes. Most articles published so far studied the interactions between bacteria of the genus Wolbachia and WNV infections, obtaining variable results regarding the directionality of this relationship. In contrast, only a few studies investigate the role of the whole microbiome or other bacterial taxa in WNV infections. These studies suggest that bacteria of the genera Serratia and Enterobacter may enhance WNV development. Thus, due to the relevance of WNV in human and animal health and the important role of mosquitoes of the Cx. pipiens complex in its transmission, more research is needed to unravel the role of mosquito microbiota and those factors affecting this microbiota on pathogen epidemiology. In this respect, we finally propose future lines of research lines on this topic.
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Affiliation(s)
- Marta Garrigós
- Department of Parasitology, University of Granada, 18071 Granada, Spain; (M.G.); (J.V.); (J.M.-d.l.P.)
| | - Mario Garrido
- Department of Parasitology, University of Granada, 18071 Granada, Spain; (M.G.); (J.V.); (J.M.-d.l.P.)
| | - Guillermo Panisse
- CEPAVE—Centro de Estudios Parasitológicos y de Vectores CONICET-UNLP, La Plata 1900, Argentina;
| | - Jesús Veiga
- Department of Parasitology, University of Granada, 18071 Granada, Spain; (M.G.); (J.V.); (J.M.-d.l.P.)
| | - Josué Martínez-de la Puente
- Department of Parasitology, University of Granada, 18071 Granada, Spain; (M.G.); (J.V.); (J.M.-d.l.P.)
- CIBER de Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain
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Wang H, Chen Q, Wei T. Complex interactions among insect viruses-insect vector-arboviruses. Insect Sci 2023. [PMID: 37877630 DOI: 10.1111/1744-7917.13285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/04/2023] [Accepted: 09/11/2023] [Indexed: 10/26/2023]
Abstract
Insects are the host or vector of diverse viruses including those that infect vertebrates, plants, and fungi. Insect viruses reside inside their insect hosts and are vertically transmitted from parent to offspring. The insect virus-host relationship is intricate, as these viruses can impact various aspects of insect biology, such as development, reproduction, sex ratios, and immunity. Arthropod-borne viruses (arboviruses) that cause substantial global health or agricultural problems can also be vertically transmitted to insect vector progeny. Multiple infections with insect viruses and arboviruses are common in nature. Such coinfections involve complex interactions, including synergism, dependence, and antagonism. Recent studies have shed light on the influence of insect viruses on the competence of insect vectors for arboviruses. In this review, we focus on the biological effects of insect viruses on the transmission of arboviruses by insects. We also discuss the potential mechanisms by which insect viruses affect the ability of hosts to transmit arboviruses, as well as potential strategies for disease control through manipulation of insect viruses. Analyses of the interactions among insect vectors, insect viruses and arboviruses will provide new opportunities for development of innovative strategies to control arbovirus transmission.
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Affiliation(s)
- Hui Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Vector-borne Virus Research Center, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qian Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Vector-borne Virus Research Center, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Taiyun Wei
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Vector-borne Virus Research Center, Fujian Agriculture and Forestry University, Fuzhou, China
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Kamaal N, Akram M, Pratap A, Kumar D, Nair RM. Urdbean Leaf Crinkle Virus: A Mystery Waiting to Be Solved. Viruses 2023; 15:2120. [PMID: 37896897 PMCID: PMC10612105 DOI: 10.3390/v15102120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/03/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023] Open
Abstract
Urdbean leaf crinkle disease (ULCD) affects mainly the urdbean or blackgram (Vigna mungo (L.) Hepper) causing distinct symptoms that often result in serious yield losses. It has been known to occur for more than five decades and is considered to be of viral etiology. The identity of the causal agent, often referred to as the urdbean leaf crinkle virus, is not unequivocally proved. There are few attempts to characterize the causal agent of ULCD; however, there is no unanimity in the results. Recent attempts to characterize the causal agent of ULCD using next-generation sequencing of the virome of ULCD-affected urdbean plants indicated the involvement of cowpea mild mottle virus; however, without conforming through Koch's postulates, the etiology of ULCD remains inconclusive. Claims of different insect vectors involved in the transmission of ULCD make this disease even more mysterious. The information available so far indicates that either two different viruses are causing ULCD or a mixture of viruses is involved. The identity of the virus/es causing ULCD still remains to be unambiguously ascertained. In this review, we attempt to analyze information on the various aspects of ULCD.
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Affiliation(s)
- Naimuddin Kamaal
- ICAR-Indian Institute of Pulses Research, Kanpur 208024, India; (N.K.); (A.P.); (D.K.)
| | - Mohammad Akram
- ICAR-Indian Institute of Pulses Research, Kanpur 208024, India; (N.K.); (A.P.); (D.K.)
| | - Aditya Pratap
- ICAR-Indian Institute of Pulses Research, Kanpur 208024, India; (N.K.); (A.P.); (D.K.)
| | - Deepender Kumar
- ICAR-Indian Institute of Pulses Research, Kanpur 208024, India; (N.K.); (A.P.); (D.K.)
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Kulkarni A, Delgadillo FM, Gayathrinathan S, Grajeda BI, Roy S. Current Status of Omics Studies Elucidating the Features of Reproductive Biology in Blood-Feeding Insects. Insects 2023; 14:802. [PMID: 37887814 PMCID: PMC10607566 DOI: 10.3390/insects14100802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023]
Abstract
Female insects belonging to the genera Anopheles, Aedes, Glossina, and Rhodnius account for the majority of global vector-borne disease mortality. In response to mating, these female insects undergo several molecular, physiological, and behavioral changes. Studying the dynamic post-mating molecular responses in these insects that transmit human diseases can lead to the identification of potential targets for the development of novel vector control methods. With the continued advancements in bioinformatics tools, we now have the capability to delve into various physiological processes in these insects. Here, we discuss the availability of multiple datasets describing the reproductive physiology of the common blood-feeding insects at the molecular level. Additionally, we compare the male-derived triggers transferred during mating to females, examining both shared and species-specific factors. These triggers initiate post-mating genetic responses in female vectors, affecting not only their reproductive success but also disease transmission.
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Affiliation(s)
- Aditi Kulkarni
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA; (A.K.); (F.M.D.); (S.G.); (B.I.G.)
- Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Frida M. Delgadillo
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA; (A.K.); (F.M.D.); (S.G.); (B.I.G.)
- Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Sharan Gayathrinathan
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA; (A.K.); (F.M.D.); (S.G.); (B.I.G.)
- Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Brian I. Grajeda
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA; (A.K.); (F.M.D.); (S.G.); (B.I.G.)
- Biosciences Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA
| | - Sourav Roy
- Department of Biological Sciences, University of Texas at El Paso, El Paso, TX 79968, USA; (A.K.); (F.M.D.); (S.G.); (B.I.G.)
- Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA
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Dongiovanni C, Di Carolo M, Fumarola G, Tauro D, Tedone B, Ancona S, Palmisano V, Carrieri M, Cavalieri V. Comparing Different Sticky Traps to Monitor the Occurrence of Philaenus spumarius and Neophilaenus campestris, Vectors of Xylella fastidiosa, in Different Crops. Insects 2023; 14:777. [PMID: 37754745 PMCID: PMC10531974 DOI: 10.3390/insects14090777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/14/2023] [Accepted: 09/18/2023] [Indexed: 09/28/2023]
Abstract
Following the detection of the quarantine bacterium Xylella fastidiosa (Wells et al.) in the Apulia region (southern Italy) and the identification of spittlebugs as the main vector species that contributes to its epidemic spread, monitoring activities have been intensified in an attempt to implement vector control strategies. To date, sweep nets have been the most widely used sampling method to monitor adult spittlebug populations. Field experiments were carried out, during 2018 and 2019, to evaluate the effectiveness of sticky traps in capturing spittlebugs in different woody crops. The attractiveness of different traps was compared: four colored sticky traps (white, red, blue, and yellow), with the yellow sticky traps having three different background patterns (plain yellow, yellow with a black circle pattern, and yellow with a black line pattern). In addition, the efficiency of the yellow sticky traps was evaluated by placing the traps on the ground or hanging them from the canopies in orchards with different spittlebug population densities. Trap catches of Philaenus spumarius (Linnaeus) and Neophilaenus campestris (Fallén) (Hemiptera: Aphrophoridae) were compared with those collected using sweep nets. The two spittlebug species showed a similar response to the colored traps and were mainly attracted to the yellow sticky traps. Captures throughout the adult season indicated that an accurate estimation of the presence and abundance of spittlebugs can be obtained by integrating the two sampling methods. Moreover, sweep nets appeared to be more efficient in collecting adults soon after their emergence, while the use of sticky traps was more efficient in the rest of the adult season when the use of traps can significantly expedite vector monitoring programs.
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Affiliation(s)
- Crescenza Dongiovanni
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Michele Di Carolo
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Giulio Fumarola
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Daniele Tauro
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Biagio Tedone
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Simona Ancona
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Valentina Palmisano
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Mauro Carrieri
- Centro di Ricerca, Formazione e Sperimentazione in Agricoltura “Basile Caramia” (CRSFA), Locorotondo, 70010 Bari, Italy; (C.D.); (M.D.C.); (G.F.); (D.T.); (B.T.); (S.A.); (V.P.); (M.C.)
| | - Vincenzo Cavalieri
- Istituto per la Protezione Sostenibile delle Piante, CNR, 70126 Bari, Italy
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Bloch M, Mou DF, Helmick EE, Pelz-Stelinski K, Bahder BW. DNA degradation in Haplaxius crudus (Hemiptera: Cixiidae) and Diaphorina citri (Hemiptera: Liviidae) on yellow sticky traps in Florida. J Insect Sci 2023; 23:14. [PMID: 37802925 PMCID: PMC10558400 DOI: 10.1093/jisesa/iead083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/06/2023] [Accepted: 09/18/2023] [Indexed: 10/08/2023]
Abstract
Lethal bronzing (LB) and huanglongbing (HLB) are harmful plant diseases causing significant economic losses in Florida agriculture. Both diseases are caused by bacteria that are transmitted by Hemipteran insect vectors. Accurate detection of pathogens within insect vectors can help provide a better understanding of disease epidemiology. Monitoring of the vector of LB is done primarily using sticky traps within palm canopies. However, it is unknown how long pathogen and vector DNA remain intact under field conditions. If significant DNA degradation takes place over the course of days or weeks, there is a possibility of false negatives occurring when detecting pathogens from these surveys. This study determined how long Haplaxius crudus Van Duzee (Hemiptera: Cixiidae) and LB DNA could remain detectable on sticky traps under field conditions in Florida in winter and summer, using PCR and qPCR. Additionally, this study compared the DNA degradation of Diaphorina citri Kuwayama (Hemiptera: Liviidae) and Candidatus Liberibacter asiaticus (CLas), the causal agent of HLB. The results showed that DNA concentration and amplification rate declined as time on sticky traps increased. Degradation varied between different target genes. The amplification rate of insect genes from sticky trap samples suggests that sticky traps should be changed weekly in summer, and every 2 wk in winter for accurate H. crudus detection. Traps should be changed every 4 days for phytoplasma detection. Traps can be changed monthly for accurate D. citri and CLas detection. Based on these results, standard monitoring protocols can be implemented to more accurately detect vectors and pathogens.
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Affiliation(s)
- Melody Bloch
- Department of Entomology and Nematology, Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Davie, FL 33314-7719, USA
| | - De-Fen Mou
- Department of Entomology and Nematology, Everglades Research and Education Center, University of Florida, 3200 E. Palm Beach Road, Belle Glade, FL 33430, USA
| | - Ericka E Helmick
- Department of Entomology and Nematology, Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Davie, FL 33314-7719, USA
| | - Kirsten Pelz-Stelinski
- Department of Entomology and Nematology, Citrus Research and Education Center, University of Florida, 700 Experiment Station Road, Lake Alfred, FL 33850, USA
| | - Brian W Bahder
- Department of Entomology and Nematology, Fort Lauderdale Research and Education Center, University of Florida, 3205 College Avenue, Davie, FL 33314-7719, USA
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Puthanveed V, Singh K, Poimenopoulou E, Pettersson J, Siddique AB, Kvarnheden A. Milder Autumns May Increase Risk for Infection of Crops with Turnip Yellows Virus. Phytopathology 2023; 113:1788-1798. [PMID: 36802872 DOI: 10.1094/phyto-11-22-0446-v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Climate change has increased the risk for infection of crops with insect-transmitted viruses. Mild autumns provide prolonged active periods to insects, which may spread viruses to winter crops. In autumn 2018, green peach aphids (Myzus persicae) were found in suction traps in southern Sweden that presented infection risk for winter oilseed rape (OSR; Brassica napus) with turnip yellows virus (TuYV). A survey was carried out in spring 2019 with random leaf samples from 46 OSR fields in southern and central Sweden using DAS-ELISA, and TuYV was detected in all fields except one. In the counties of Skåne, Kalmar, and Östergötland, the average incidence of TuYV-infected plants was 75%, and the incidence reached 100% for nine fields. Sequence analyses of the coat protein gene revealed a close relationship between TuYV isolates from Sweden and other parts of the world. High-throughput sequencing for one of the OSR samples confirmed the presence of TuYV and revealed coinfection with TuYV-associated RNA. Molecular analyses of seven sugar beet (Beta vulgaris) plants with yellowing, collected in 2019, revealed that two of them were infected by TuYV, together with two other poleroviruses: beet mild yellowing virus and beet chlorosis virus. The presence of TuYV in sugar beet suggests a spillover from other hosts. Poleroviruses are prone to recombination, and mixed infection with three poleroviruses in the same plant poses a risk for the emergence of new polerovirus genotypes. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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Affiliation(s)
- Vinitha Puthanveed
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
| | - Khushwant Singh
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
- Division of Crop Protection and Plant Health, Crop Research Institute, Prague 161 06, Czech Republic
| | - Efstratia Poimenopoulou
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
| | - Josefin Pettersson
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
| | - Abu Bakar Siddique
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
| | - Anders Kvarnheden
- Department of Plant Biology, Linnean Center for Plant Biology, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden
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11
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Yoon S, Lee WH. Assessing potential European areas of Pierce's disease mediated by insect vectors by using spatial ensemble model. Front Plant Sci 2023; 14:1209694. [PMID: 37396635 PMCID: PMC10312007 DOI: 10.3389/fpls.2023.1209694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 05/29/2023] [Indexed: 07/04/2023]
Abstract
Pierce's disease (PD) is a serious threat to grape production in Europe. This disease is caused by Xylella fastidiosa and is mediated by insect vectors, suggesting its high potential for spread and necessity for early monitoring. In this study, hence, potential distribution of Pierce's disease varied with climate change and was spatially evaluated in Europe using ensemble species distribution modeling. Two models of X. fastidiosa and three major insect vectors (Philaenus spumarius, Neophilaenus campestris, and Cicadella viridis) were developed using CLIMEX and MaxEnt. The consensus areas of the disease and insect vectors, along with host distribution, were evaluated using ensemble mapping to identify high-risk areas for the disease. Our predictions showed that the Mediterranean region would be the most vulnerable to Pierce's disease, and the high-risk area would increase three-fold due to climate change under the influence of N. campestris distribution. This study demonstrated a methodology for species distribution modeling specific to diseases and vectors while providing results that could be used for monitoring Pierce's disease by simultaneously considering the disease agent, vectors, and host distribution.
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Affiliation(s)
- Sunhee Yoon
- Department of Smart Agriculture Systems, Chungnam National University, Daejeon, Republic of Korea
| | - Wang-Hee Lee
- Department of Smart Agriculture Systems, Chungnam National University, Daejeon, Republic of Korea
- Department of Biosystems Machinery Engineering, Chungnam National University, Daejeon, Republic of Korea
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12
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Stelder JJ, Mihalca AD, Olesen AS, Kjær LJ, Boklund AE, Rasmussen TB, Marinov M, Alexe V, Balmoş OM, Bødker R. Potential mosquito vector attraction to- and feeding preferences for pigs in Romanian backyard farms. Front Vet Sci 2023; 9:1046263. [PMID: 36686172 PMCID: PMC9846066 DOI: 10.3389/fvets.2022.1046263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/08/2022] [Indexed: 01/05/2023] Open
Abstract
Introduction Mosquitoes either biologically or mechanically transmit various vector-borne pathogens affecting pigs. Mosquito species display a wide variety of host preference, as well as host attraction and behaviours. Mosquito species attraction rates to- and feeding rates on pigs or other potential hosts, as well as the seasonal abundance of the mosquito species affects their pathogen transmission potential. Methods We caught mosquitoes in experimental cages containing pigs situated in Romanian backyard farms. The host species of blood meals were identified with PCR and sequencing. Results High feeding preferences for pigs were observed in Aedes vexans (90%), Anopheles maculipennis (80%) and Culiseta annulata (72.7%). However, due to a high abundance in the traps, Culex pipiens/torrentium were responsible for 37.9% of all mosquito bites on pigs in the Romanian backyards, despite low feeding rates on pigs in the cages (18.6%). We also found that other predominantly ornithophilic mosquito species, as well as mosquitoes that are already carrying a blood meal from a different (mammalian) host, were attracted to backyard pigs or their enclosure. Discussion These results indicate that viraemic blood carrying, for instance, African swine fever virus, West-Nile virus or Japanese encephalitis virus could be introduced to these backyard pig farms and therefore cause an infection, either through subsequent feeding, via ingestion by the pig or by environmental contamination.
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Affiliation(s)
- Jonno Jorn Stelder
- Section for Animal Welfare and Disease Control, Department of Veterinary and Animal Sciences, Copenhagen University, Copenhagen, Denmark,*Correspondence: Jonno Jorn Stelder ✉
| | - Andrei Daniel Mihalca
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca, Romania
| | - Ann Sofie Olesen
- Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Copenhagen, Denmark
| | - Lene Jung Kjær
- Section for Animal Welfare and Disease Control, Department of Veterinary and Animal Sciences, Copenhagen University, Copenhagen, Denmark
| | - Anette Ella Boklund
- Section for Animal Welfare and Disease Control, Department of Veterinary and Animal Sciences, Copenhagen University, Copenhagen, Denmark
| | - Thomas Bruun Rasmussen
- Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, Copenhagen, Denmark
| | - Mihai Marinov
- Department of Biodiversity Conservation and Sustainable Use of Natural Resources, Danube Delta National Institute for Research and Development, Tulcea, Romania
| | - Vasile Alexe
- Department of Biodiversity Conservation and Sustainable Use of Natural Resources, Danube Delta National Institute for Research and Development, Tulcea, Romania
| | - Oana Maria Balmoş
- Department of Parasitology and Parasitic Diseases, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca, Romania
| | - René Bødker
- Section for Animal Welfare and Disease Control, Department of Veterinary and Animal Sciences, Copenhagen University, Copenhagen, Denmark
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Bragard C, Baptista P, Chatzivassiliou E, Di Serio F, Gonthier P, Jaques Miret JA, Justesen AF, MacLeod A, Magnusson CS, Milonas P, Navas‐Cortes JA, Parnell S, Potting R, Stefani E, Thulke H, Van der Werf W, Civera AV, Yuen J, Zappalà L, Chen J, Migheli Q, Vloutoglou I, Streissl F, Reignault PL. Pest categorisation of Xylella taiwanensis. EFSA J 2023; 21:e07736. [PMID: 36698497 PMCID: PMC9854164 DOI: 10.2903/j.efsa.2023.7736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The EFSA Plant Health Panel performed a pest categorisation of Xylella taiwanensis, a Gram-negative bacterium belonging to the Xanthomonadaceae. The pathogen is a well-defined taxonomic entity, and it is the causal agent of the pear leaf scorch. X. taiwanensis is present in subtropical and temperate areas of the island of Taiwan, where it affects low chilling pear cultivars of the species Pyrus pyrifolia (Asian pear). No other plant species are reported to be affected by the pathogen. The pathogen is not known to be present in the EU territory and it is not included in the Commission Implementing Regulation (EU) 2019/2072. The main pathway for the entry of the pathogen into the EU territory is host plants for planting (except seeds); another possible pathway might be represented by putative insect vectors, though their identity remains unknown. The cultivated area of P. pyrifolia in the EU territory is very limited. Conversely, the genetically related P. communis is widely cultivated in most EU Member States and there is no information so far on the susceptibility of its several cultivars. Should the pest establish in the EU, economic impact is expected, provided that suitable insect vectors are present and P. communis is as susceptible to infection as P. pyrifolia. Phytosanitary measures are available to prevent the introduction and spread of the pathogen into the EU, since plants for planting from Taiwan is a closed pathway; nonetheless, putative vectors, if confirmed and identified, may represent an additional risk of the pathogen's introduction and spread. The lack of knowledge on whether X. taiwanensis can infect P. communis, the identity and presence of suitable vectors in the EU lead to key uncertainties on entry, establishment, spread and impact. X. taiwanensis satisfies the criteria that are within the remit of EFSA to assess for this species to be regarded as a potential Union quarantine pest.
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Lucchesi V, Grimaldi L, Mastrantonio V, Porretta D, Di Bella L, Ruspandini T, Di Salvo ML, Vontas J, Bellini R, Negri A, Epis S, Caccia S, Bandi C, Urbanelli S. Cuticle Modifications and Over-Expression of the Chitin-Synthase Gene in Diflubenzuron-Resistant Phenotype. Insects 2022; 13:1109. [PMID: 36555019 PMCID: PMC9782986 DOI: 10.3390/insects13121109] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/21/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Insecticide resistance is a major threat challenging the control of harmful insect species. The study of resistant phenotypes is, therefore, pivotal to understand molecular mechanisms underpinning insecticide resistance and plan effective control and resistance management strategies. Here, we further analysed the diflubenzuron (DFB)-resistant phenotype due to the point-mutation I1043M in the chitin-synthase 1 gene (chs1) in the mosquito Culex pipiens. By comparing susceptible and resistant strains of Cx. pipiens through DFB bioassays, molecular analyses and scanning electron microscopy, we showed that the I1043M-resistant mosquitoes have: (i) a striking level of DFB resistance (i.e., resistance ratio: 9006); (ii) a constitutive 11-fold over-expression of the chs1 gene; (iii) enhanced cuticle thickness and cuticular chitin content. Culex pipiens is one of the most important vector species in Europe and the rapid spread of DFB resistance can threaten its control. Our results, by adding new data about the DFB-resistant phenotype, provide important information for the control and management of insecticide resistance.
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Affiliation(s)
- Valentina Lucchesi
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
| | - Lorenzo Grimaldi
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
| | | | - Daniele Porretta
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
| | - Letizia Di Bella
- Department of Earth Sciences, Sapienza University of Rome, 00185 Rome, Italy
| | - Tania Ruspandini
- Department of Earth Sciences, Sapienza University of Rome, 00185 Rome, Italy
| | - Martino Luigi Di Salvo
- Department of Biochemical Sciences “A. Rossi Fanelli”, Sapienza University of Rome, 00185 Rome, Italy
| | - John Vontas
- Department of Crop Science, Pesticide Science Lab, Agricultural University of Athens, 11855 Athens, Greece
- Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology Hellas, P.O. Box 1385, GR-711 10 Heraklion, Greece
| | - Romeo Bellini
- Medical and Veterinary Entomology, Centro Agricoltura Ambiente “G. Nicoli”, 40014 Bologna, Italy
| | - Agata Negri
- Department of Biosciences, University of Milan, 20122 Milan, Italy
| | - Sara Epis
- Department of Biosciences, University of Milan, 20122 Milan, Italy
| | - Silvia Caccia
- Department of Biosciences, University of Milan, 20122 Milan, Italy
| | - Claudio Bandi
- Department of Biosciences, University of Milan, 20122 Milan, Italy
- Pediatric CRC “Romeo ed Enrica Invernizzi”, University of Milan, 20122 Milan, Italy
| | - Sandra Urbanelli
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
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Gebiola M, Le BH, Mauck KE. A reproducible and sensitive method for generating high-quality transcriptomes from single whitefly salivary glands and other low-input tissues. Insect Sci 2022; 29:1318-1328. [PMID: 35068058 DOI: 10.1111/1744-7917.13008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 12/15/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Transcriptomic studies are an important tool for understanding the molecular pathways underlying host plant use by agricultural pests, including vectors of damaging plant pathogens. Thus far, bulk RNA-Seq has been the main approach for non-model insects. This method relies on pooling large numbers of whole organisms or hundreds of individually dissected organs. The latter approach is logistically challenging, may introduce artifacts of handling and storage, and is not compatible with biological replication. Here, we tested an approach to generate transcriptomes of individual salivary glands and other low-input body tissues from whiteflies (Bemisia tabaci MEAM1), which are major vectors of plant viruses. By comparing our outputs to published bulk RNA-Seq datasets for whole whitefly bodies and pools of salivary glands, we demonstrate that this approach recovers similar numbers of transcripts relative to bulk RNA-Seq in a tissue-specific manner, and for some metrics, exceeds performance of bulk tissue RNA-Seq. Libraries generated from individual salivary glands also yielded additional novel transcripts not identified in pooled salivary gland datasets, and had hundreds of enriched transcripts when compared with whole head tissues. Overall, our study demonstrates that it is feasible to produce high quality, replicated transcriptomes of whitefly salivary glands and other low-input tissues. We anticipate that our approach will expand hypothesis-driven research on salivary glands of whiteflies and other Hemiptera, thus enabling novel control strategies to disrupt feeding and virus transmission.
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Affiliation(s)
- Marco Gebiola
- Department of Entomology, University of California Riverside, Riverside, California
| | - Brandon H Le
- Department of Botany and Plant Sciences, University of California Riverside, Riverside, California
- Institute of Integrative Genome Biology, University of California Riverside, Riverside, California, USA
| | - Kerry E Mauck
- Department of Entomology, University of California Riverside, Riverside, California
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Lu QY, Ma Y, Smith WK, Yu J, Cheng YY, Zhang P, Han TT. The Identification of Tautoneura mori as the Vector of Mulberry Crinkle Leaf Virus and the Infectivity of Infectious Clones in Mulberry. Phytopathology 2022; 112:435-440. [PMID: 34261340 DOI: 10.1094/phyto-03-21-0094-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Mulberry crinkle leaf virus (MCLV) is a novel geminivirus identified from mulberry. The pathogenicity and natural vector transmission of MCLV remain unknown. Here, infectious clones consisting of the complete tandem dimeric genome of MCLV in a binary vector were constructed and agroinoculated into young mulberry plants. The results showed that the infectious clones of MCLV were systemically infectious in mulberry, but the infected mulberry plants did not show any virus infection-like symptoms. The natural transmission vectors of MCLV were also identified from possible vector insects occurring on the MCLV-infected mulberry plants. The vector ability of Tautoneura mori was identified through an inoculation assay. Three of 21 (14.3%) plants inoculated with T. mori collected from MCLV-infected mulberry plants grown naturally were found to be MCLV-positive 50 days postinoculation. These MCLV-positive mulberry plants did not show any virus infection-like symptoms. Collectively, these results suggest that MCLV is infectious to mulberry plants but, by itself, does not induce infection symptoms. The leafhopper T. mori was experimentally determined to be a transmission vector of MCLV for the first time.
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Affiliation(s)
- Quan-You Lu
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
- Key Laboratory of Genetic Improvement of Silkworm and Mulberry, Ministry of Agriculture and Rural Affairs, Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212018 Jiangsu, China
| | - Yu Ma
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
| | - William Kojo Smith
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
| | - Jing Yu
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
| | - Yong-Yuan Cheng
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
| | - Peng Zhang
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
| | - Tao-Tao Han
- College of Biotechnology, Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212018 Jiangsu, China
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Travers Cook TJ, Skirgaila C, Martin OY, Buser CC. Infection by dsRNA viruses is associated with enhanced sporulation efficiency in Saccharomyces cerevisiae. Ecol Evol 2022; 12:e8558. [PMID: 35127053 PMCID: PMC8794758 DOI: 10.1002/ece3.8558] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/23/2021] [Accepted: 12/31/2021] [Indexed: 01/07/2023] Open
Abstract
Upon starvation diploid cells of the facultative sexual yeast Saccharomyces cerevisiae undergo sporulation, forming four metabolically quiescent and robust haploid spores encased in a degradable ascus. All endosymbionts, whether they provide net benefits or costs, utilize host resources; in yeast, this should induce an earlier onset of sporulation. Here, we tested whether the presence of endosymbiotic dsRNA viruses (M satellite and L-A helper) correspond with higher sporulation rate of their host, S. cerevisiae. We find that S. cerevisiae hosting both the M and L-A viruses (so-called "killer yeasts") have significantly higher sporulation efficiency than those without. We also found that the removal of the M virus did not reduce sporulation frequency, possibly because the L-A virus still utilizes host resources with and without the M virus. Our findings indicate that either virulent resource use by endosymbionts induces sporulation, or that viruses are spread more frequently to sporulating strains. Further exploration is required to distinguish cause from effect.
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Affiliation(s)
- Thomas J. Travers Cook
- Institute of Integrative BiologyETH ZürichZürichSwitzerland
- Department of Aquatic EcologyEawagDübendorfSwitzerland
| | | | - Oliver Y. Martin
- Institute of Integrative BiologyETH ZürichZürichSwitzerland
- Department of BiologyETH ZürichZürichSwitzerland
| | - Claudia C. Buser
- Institute of Integrative BiologyETH ZürichZürichSwitzerland
- Department of Aquatic EcologyEawagDübendorfSwitzerland
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18
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Zeni V, Baliota GV, Benelli G, Canale A, Athanassiou CG. Diatomaceous Earth for Arthropod Pest Control: Back to the Future. Molecules 2021; 26:7487. [PMID: 34946567 PMCID: PMC8706096 DOI: 10.3390/molecules26247487] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 11/19/2022] Open
Abstract
Nowadays, we are tackling various issues related to the overuse of synthetic insecticides. Growing concerns about biodiversity, animal and human welfare, and food security are pushing agriculture toward a more sustainable approach, and research is moving in this direction, looking for environmentally friendly alternatives to be adopted in Integrated Pest Management (IPM) protocols. In this regard, inert dusts, especially diatomaceous earths (DEs), hold a significant promise to prevent and control a wide range of arthropod pests. DEs are a type of naturally occurring soft siliceous sedimentary rock, consisting of the fossilized exoskeleton of unicellular algae, which are called diatoms. Mainly adopted for the control of stored product pests, DEs have found also their use against some household insects living in a dry environment, such as bed bugs, or insects of agricultural interest. In this article, we reported a comprehensive review of the use of DEs against different arthropod pest taxa, such as Acarina, Blattodea, Coleoptera, Diptera, Hemiptera, Hymenoptera, Ixodida, Lepidoptera, when applied either alone or in combination with other techniques. The mechanisms of action of DEs, their real-world applications, and challenges related to their adoption in IPM programs are critically reported.
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Affiliation(s)
- Valeria Zeni
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy; (V.Z.); (A.C.)
| | - Georgia V. Baliota
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou Str., 38446 Volos, Greece; (G.V.B.); (C.G.A.)
| | - Giovanni Benelli
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy; (V.Z.); (A.C.)
| | - Angelo Canale
- Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124 Pisa, Italy; (V.Z.); (A.C.)
| | - Christos G. Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou Str., 38446 Volos, Greece; (G.V.B.); (C.G.A.)
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Škorić D, Černi S, Ćurković-Perica M, Ježić M, Krajačić M, Šeruga Musić M. Legacy of Plant Virology in Croatia-From Virus Identification to Molecular Epidemiology, Evolution, Genomics and Beyond. Viruses 2021; 13:2339. [PMID: 34960609 PMCID: PMC8707422 DOI: 10.3390/v13122339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/19/2021] [Accepted: 11/20/2021] [Indexed: 11/16/2022] Open
Abstract
This paper showcases the development of plant virology in Croatia at the University of Zagreb, Faculty of Science, from its beginning in the 1950s until today, more than 70 years later. The main achievements of the previous and current group members are highlighted according to various research topics and fields. Expectedly, some of those accomplishments remained within the field of plant virology, but others make part of a much-extended research spectrum exploring subviral pathogens, prokaryotic plant pathogens, fungi and their viruses, as well as their interactions within ecosystems. Thus, the legacy of plant virology in Croatia continues to contribute to the state of the art of microbiology far beyond virology. Research problems pertinent for directing the future research endeavors are also proposed in this review.
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Affiliation(s)
- Dijana Škorić
- Department of Biology, Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia; (S.Č.); (M.Ć.-P.); (M.J.); (M.K.); (M.Š.M.)
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Bodino N, Demichelis S, Simonetto A, Volani S, Saladini MA, Gilioli G, Bosco D. Phenology, Seasonal Abundance, and Host-Plant Association of Spittlebugs (Hemiptera: Aphrophoridae) in Vineyards of Northwestern Italy. Insects 2021; 12:insects12111012. [PMID: 34821812 PMCID: PMC8624594 DOI: 10.3390/insects12111012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 12/05/2022]
Abstract
Simple Summary Spittlebugs are the most abundant and widespread xylem-sap feeder insects in Europe. They are also the only proven vectors of the notorious bacterium Xylella fastidiosa (Xf) in the Old World. Xf inhabits the xylem of hundreds of plant species and is the causal agent of severe diseases to several crop plants, including grapevines. Since the spread of Xf depends on insect transmission, the study of vector abundance and ecology in the vineyard is of key importance in assessing the risk of disease spread to grapevines. The aim of this work was to gain information on Xf vector ecology and abundance in the vineyard agroecosystem. Herbaceous cover of inter-rows and headlands was colonized in spring by nymphs and in late summer/autumn by adults for oviposition, while woody hosts (grapevines and trees in the surroundings) represented a refuge during summer. Three spittlebug species were collected: Philaenus spumarius, Neophilaenus campestris, and Aphrophora alni, but the latter two species were very rare on the grapevine canopy. The presence of P. spumarius for an extended period on the grapevine canopy, together with its known ability to transmit Xf to grapevine, underlines the importance of preventing the introduction of Xf in Xf-free areas and of monitoring health conditions of grapevines in the Xf-infected areas of Europe. Abstract Spittlebugs (Hemiptera: Aphrophoridae) are the vectors of the bacterium Xylella fastidiosa (Xf) in Europe. Xf may cause severe epidemics in cultivated plants, including grapevines. To assess the threat represented by the bacterium to grapevines, detailed information on the vectors’ phenology, density, and ecology in vineyards is needed. The aim of the present work was to describe spittlebug diversity, phenology, and host-plant association in the vineyard agroecosystem. Two separate field surveys of nymphal and adult spittlebug populations, i.e., a two-year survey of a single site and a one-year survey of three sites, were performed in vineyards of northwestern Italy in three consecutive years. Philaenus spumarius was the most common species, reaching average nymph densities on herbaceous cover up to 60–130 nymphs/m2. Adults were sampled on grapevines from May to September, with a peak in June (up to 0.43 insects/sweep). Herbaceous cover was colonized after egg hatching and in late summer for oviposition, while wild woody hosts represented a refuge during summer. The results show that spittlebugs can reach high population levels in vineyards, at least in the areas where the ground is covered by herbaceous plants for the whole season and the use of insecticides is moderate. The extended presence of P. spumarius adults on grapevines represents a serious risk factor for the spread of Xf. The scenarios of Xf establishment in vineyards in northwestern Italy and Europe are discussed in relation to the abundance, phenology, and plant association of spittlebugs.
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Affiliation(s)
- Nicola Bodino
- CNR–Istituto per la Protezione Sostenibile delle Piante, Strada delle Cacce, 73, 10135 Torino, Italy;
| | - Stefano Demichelis
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy; (S.D.); (M.A.S.)
| | - Anna Simonetto
- Agrofood Lab, Dipartimento di Ingegneria Civile, Architettura, Territorio, Ambiente e di Matematica, Università degli Studi di Brescia, 25123 Brescia, Italy; (A.S.); (G.G.)
| | - Stefania Volani
- Agrofood Lab, Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, 25123 Brescia, Italy;
| | - Matteo Alessandro Saladini
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy; (S.D.); (M.A.S.)
| | - Gianni Gilioli
- Agrofood Lab, Dipartimento di Ingegneria Civile, Architettura, Territorio, Ambiente e di Matematica, Università degli Studi di Brescia, 25123 Brescia, Italy; (A.S.); (G.G.)
| | - Domenico Bosco
- CNR–Istituto per la Protezione Sostenibile delle Piante, Strada delle Cacce, 73, 10135 Torino, Italy;
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy; (S.D.); (M.A.S.)
- Correspondence:
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Price SL, Vadyvaloo V, DeMarco JK, Brady A, Gray PA, Kehl-Fie TE, Garneau-Tsodikova S, Perry RD, Lawrenz MB. Yersiniabactin contributes to overcoming zinc restriction during Yersinia pestis infection of mammalian and insect hosts. Proc Natl Acad Sci U S A 2021; 118:e2104073118. [PMID: 34716262 PMCID: PMC8612365 DOI: 10.1073/pnas.2104073118] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 09/09/2021] [Indexed: 02/04/2023] Open
Abstract
Yersinia pestis causes human plague and colonizes both a mammalian host and a flea vector during its transmission cycle. A key barrier to bacterial infection is the host's ability to actively sequester key biometals (e.g., iron, zinc, and manganese) required for bacterial growth. This is referred to as nutritional immunity. Mechanisms to overcome nutritional immunity are essential virulence factors for bacterial pathogens. Y. pestis produces an iron-scavenging siderophore called yersiniabactin (Ybt) that is required to overcome iron-mediated nutritional immunity and cause lethal infection. Recently, Ybt has been shown to bind to zinc, and in the absence of the zinc transporter ZnuABC, Ybt improves Y. pestis growth in zinc-limited medium. These data suggest that, in addition to iron acquisition, Ybt may also contribute to overcoming zinc-mediated nutritional immunity. To test this hypothesis, we used a mouse model defective in iron-mediated nutritional immunity to demonstrate that Ybt contributes to virulence in an iron-independent manner. Furthermore, using a combination of bacterial mutants and mice defective in zinc-mediated nutritional immunity, we identified calprotectin as the primary barrier for Y. pestis to acquire zinc during infection and that Y. pestis uses Ybt to compete with calprotectin for zinc. Finally, we discovered that Y. pestis encounters zinc limitation within the flea midgut, and Ybt contributes to overcoming this limitation. Together, these results demonstrate that Ybt is a bona fide zinc acquisition mechanism used by Y. pestis to surmount zinc limitation during the infection of both the mammalian and insect hosts.
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Affiliation(s)
- Sarah L Price
- Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40202
| | - Viveka Vadyvaloo
- Paul G. Allen School for Global Health, Washington State University, Pullman, WA 99164
| | - Jennifer K DeMarco
- Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, KY 40292
| | - Amanda Brady
- Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40202
| | - Phoenix A Gray
- Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40202
| | - Thomas E Kehl-Fie
- Department of Microbiology and Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, Champaign, IL 61820
| | - Sylvie Garneau-Tsodikova
- Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, KY 40536
| | - Robert D Perry
- Department of Microbiology, Immunology, and Molecular Genetics, University of Kentucky School of Medicine, Lexington, KY 40506
| | - Matthew B Lawrenz
- Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40202;
- Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, KY 40292
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22
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Huang W, MacLean AM, Sugio A, Maqbool A, Busscher M, Cho ST, Kamoun S, Kuo CH, Immink RGH, Hogenhout SA. Parasitic modulation of host development by ubiquitin-independent protein degradation. Cell 2021; 184:5201-5214.e12. [PMID: 34536345 DOI: 10.1016/j.cell.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 07/14/2021] [Accepted: 08/24/2021] [Indexed: 05/27/2023]
Abstract
Certain obligate parasites induce complex and substantial phenotypic changes in their hosts in ways that favor their transmission to other trophic levels. However, the mechanisms underlying these changes remain largely unknown. Here we demonstrate how SAP05 protein effectors from insect-vectored plant pathogenic phytoplasmas take control of several plant developmental processes. These effectors simultaneously prolong the host lifespan and induce witches' broom-like proliferations of leaf and sterile shoots, organs colonized by phytoplasmas and vectors. SAP05 acts by mediating the concurrent degradation of SPL and GATA developmental regulators via a process that relies on hijacking the plant ubiquitin receptor RPN10 independent of substrate ubiquitination. RPN10 is highly conserved among eukaryotes, but SAP05 does not bind insect vector RPN10. A two-amino-acid substitution within plant RPN10 generates a functional variant that is resistant to SAP05 activities. Therefore, one effector protein enables obligate parasitic phytoplasmas to induce a plethora of developmental phenotypes in their hosts.
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Affiliation(s)
- Weijie Huang
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Allyson M MacLean
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Akiko Sugio
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Abbas Maqbool
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Marco Busscher
- Laboratory of Molecular Biology, Wageningen University and Research, Wageningen 6708 PB, the Netherlands; Plant Developmental Systems, Bioscience, Wageningen University and Research, Wageningen 6708 PB, the Netherlands
| | - Shu-Ting Cho
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Sophien Kamoun
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Chih-Horng Kuo
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Richard G H Immink
- Laboratory of Molecular Biology, Wageningen University and Research, Wageningen 6708 PB, the Netherlands; Plant Developmental Systems, Bioscience, Wageningen University and Research, Wageningen 6708 PB, the Netherlands
| | - Saskia A Hogenhout
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
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23
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Huang W, MacLean AM, Sugio A, Maqbool A, Busscher M, Cho ST, Kamoun S, Kuo CH, Immink RGH, Hogenhout SA. Parasitic modulation of host development by ubiquitin-independent protein degradation. Cell 2021; 184:5201-5214.e12. [PMID: 34536345 PMCID: PMC8525514 DOI: 10.1016/j.cell.2021.08.029] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 07/14/2021] [Accepted: 08/24/2021] [Indexed: 01/08/2023]
Abstract
Certain obligate parasites induce complex and substantial phenotypic changes in their hosts in ways that favor their transmission to other trophic levels. However, the mechanisms underlying these changes remain largely unknown. Here we demonstrate how SAP05 protein effectors from insect-vectored plant pathogenic phytoplasmas take control of several plant developmental processes. These effectors simultaneously prolong the host lifespan and induce witches' broom-like proliferations of leaf and sterile shoots, organs colonized by phytoplasmas and vectors. SAP05 acts by mediating the concurrent degradation of SPL and GATA developmental regulators via a process that relies on hijacking the plant ubiquitin receptor RPN10 independent of substrate ubiquitination. RPN10 is highly conserved among eukaryotes, but SAP05 does not bind insect vector RPN10. A two-amino-acid substitution within plant RPN10 generates a functional variant that is resistant to SAP05 activities. Therefore, one effector protein enables obligate parasitic phytoplasmas to induce a plethora of developmental phenotypes in their hosts.
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Affiliation(s)
- Weijie Huang
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Allyson M MacLean
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Akiko Sugio
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK
| | - Abbas Maqbool
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Marco Busscher
- Laboratory of Molecular Biology, Wageningen University and Research, Wageningen 6708 PB, the Netherlands; Plant Developmental Systems, Bioscience, Wageningen University and Research, Wageningen 6708 PB, the Netherlands
| | - Shu-Ting Cho
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Sophien Kamoun
- The Sainsbury Laboratory, University of East Anglia, Norwich Research Park, Norwich NR4 7UH, UK
| | - Chih-Horng Kuo
- Institute of Plant and Microbial Biology, Academia Sinica, Taipei 11529, Taiwan
| | - Richard G H Immink
- Laboratory of Molecular Biology, Wageningen University and Research, Wageningen 6708 PB, the Netherlands; Plant Developmental Systems, Bioscience, Wageningen University and Research, Wageningen 6708 PB, the Netherlands
| | - Saskia A Hogenhout
- Department of Crop Genetics, John Innes Centre, Norwich Research Park, Norwich NR4 7UH, UK.
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Chulanetra M, Chaicumpa W. Revisiting the Mechanisms of Immune Evasion Employed by Human Parasites. Front Cell Infect Microbiol 2021; 11:702125. [PMID: 34395313 PMCID: PMC8358743 DOI: 10.3389/fcimb.2021.702125] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 06/25/2021] [Indexed: 12/14/2022] Open
Abstract
For the establishment of a successful infection, i.e., long-term parasitism and a complete life cycle, parasites use various diverse mechanisms and factors, which they may be inherently bestowed with, or may acquire from the natural vector biting the host at the infection prelude, or may take over from the infecting host, to outmaneuver, evade, overcome, and/or suppress the host immunity, both innately and adaptively. This narrative review summarizes the up-to-date strategies exploited by a number of representative human parasites (protozoa and helminths) to counteract the target host immune defense. The revisited information should be useful for designing diagnostics and therapeutics as well as vaccines against the respective parasitic infections.
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Affiliation(s)
- Monrat Chulanetra
- Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanpen Chaicumpa
- Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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Chen Q, Liu Y, Ren J, Zhong P, Chen M, Jia D, Chen H, Wei T. Exosomes mediate horizontal transmission of viral pathogens from insect vectors to plant phloem. eLife 2021; 10:64603. [PMID: 34214032 PMCID: PMC8253596 DOI: 10.7554/elife.64603] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 06/21/2021] [Indexed: 12/19/2022] Open
Abstract
Numerous piercing-sucking insects can horizontally transmit viral pathogens together with saliva to plant phloem, but the mechanism remains elusive. Here, we report that an important rice reovirus has hijacked small vesicles, referred to as exosomes, to traverse the apical plasmalemma into saliva-stored cavities in the salivary glands of leafhopper vectors. Thus, virions were horizontally transmitted with exosomes into rice phloem to establish the initial plant infection during vector feeding. The purified exosomes secreted from cultured leafhopper cells were enriched with virions. Silencing the exosomal secretion-related small GTPase Rab27a or treatment with the exosomal biogenesis inhibitor GW4869 strongly prevented viral exosomal release in vivo and in vitro. Furthermore, the specific interaction of the 15-nm-long domain of the viral outer capsid protein with Rab5 induced the packaging of virions in exosomes, ultimately activating the Rab27a-dependent exosomal release pathway. We thus anticipate that exosome-mediated viral horizontal transmission is the conserved strategy hijacked by vector-borne viruses.
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Affiliation(s)
- Qian Chen
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuyan Liu
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Jiping Ren
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Panpan Zhong
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Manni Chen
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Dongsheng Jia
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Hongyan Chen
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Taiyun Wei
- Vector-borne Virus Research Center, Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
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26
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Ferraguti M, Martínez-de la Puente J, Figuerola J. Ecological Effects on the Dynamics of West Nile Virus and Avian Plasmodium: The Importance of Mosquito Communities and Landscape. Viruses 2021; 13:v13071208. [PMID: 34201673 PMCID: PMC8310121 DOI: 10.3390/v13071208] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 01/30/2023] Open
Abstract
Humans and wildlife are at risk from certain vector-borne diseases such as malaria, dengue, and West Nile and yellow fevers. Factors linked to global change, including habitat alteration, land-use intensification, the spread of alien species, and climate change, are operating on a global scale and affect both the incidence and distribution of many vector-borne diseases. Hence, understanding the drivers that regulate the transmission of pathogens in the wild is of great importance for ecological, evolutionary, health, and economic reasons. In this literature review, we discuss the ecological factors potentially affecting the transmission of two mosquito-borne pathogens circulating naturally between birds and mosquitoes, namely, West Nile virus (WNV) and the avian malaria parasites of the genus Plasmodium. Traditionally, the study of pathogen transmission has focused only on vectors or hosts and the interactions between them, while the role of landscape has largely been ignored. However, from an ecological point of view, it is essential not only to study the interaction between each of these organisms but also to understand the environmental scenarios in which these processes take place. We describe here some of the similarities and differences in the transmission of these two pathogens and how research into both systems may facilitate a greater understanding of the dynamics of vector-borne pathogens in the wild.
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Affiliation(s)
- Martina Ferraguti
- Department of Theoretical and Computational Ecology (TCE), Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
- Correspondence: (M.F.); (J.M.-d.l.P.)
| | - Josué Martínez-de la Puente
- Department of Parasitology, University of Granada, E-18071 Granada, Spain
- CIBER of Epidemiology and Public Health (CIBERESP), Spain
- Correspondence: (M.F.); (J.M.-d.l.P.)
| | - Jordi Figuerola
- Doñana Biological Station (EBD-CSIC), E-41092 Seville, Spain;
- CIBER of Epidemiology and Public Health (CIBERESP), Spain
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Vallino M, Rossi M, Ottati S, Martino G, Galetto L, Marzachì C, Abbà S. Bacteriophage-Host Association in the Phytoplasma Insect Vector Euscelidius variegatus. Pathogens 2021; 10:pathogens10050612. [PMID: 34067814 PMCID: PMC8156552 DOI: 10.3390/pathogens10050612] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 12/26/2022] Open
Abstract
Insect vectors transmit viruses and bacteria that can cause severe diseases in plants and economic losses due to a decrease in crop production. Insect vectors, like all other organisms, are colonized by a community of various microorganisms, which can influence their physiology, ecology, evolution, and also their competence as vectors. The important ecological meaning of bacteriophages in various ecosystems and their role in microbial communities has emerged in the past decade. However, only a few phages have been described so far in insect microbiomes. The leafhopper Euscelidius variegatus is a laboratory vector of the phytoplasma causing Flavescence dorée, a severe grapevine disease that threatens viticulture in Europe. Here, the presence of a temperate bacteriophage in E. variegatus (named Euscelidius variegatus phage 1, EVP-1) was revealed through both insect transcriptome analyses and electron microscopic observations. The bacterial host was isolated in axenic culture and identified as the bacterial endosymbiont of E. variegatus (BEV), recently assigned to the genus Candidatus Symbiopectobacterium. BEV harbors multiple prophages that become active in culture, suggesting that different environments can trigger different mechanisms, finely regulating the interactions among phages. Understanding the complex relationships within insect vector microbiomes may help in revealing possible microbe influences on pathogen transmission, and it is a crucial step toward innovative sustainable strategies for disease management in agriculture.
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Affiliation(s)
- Marta Vallino
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
- Correspondence:
| | - Marika Rossi
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
| | - Sara Ottati
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
- Dipartimento di Scienze Agrarie, Forestali ed Alimentari DISAFA, Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Gabriele Martino
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
- Dipartimento di Scienze Agrarie, Forestali ed Alimentari DISAFA, Università degli Studi di Torino, Largo Paolo Braccini 2, 10095 Grugliasco, Italy
| | - Luciana Galetto
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
| | - Cristina Marzachì
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
| | - Simona Abbà
- Institute for Sustainable Plant Protection, National Research Council of Italy, Strada delle Cacce 73, 10135 Torino, Italy; (M.R.); (S.O.); (G.M.); (L.G.); (C.M.); (S.A.)
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Holeva-Eklund WM, Behrens TK, Hepp CM. Systematic review: the impact of socioeconomic factors on Aedes aegypti mosquito distribution in the mainland United States. Rev Environ Health 2021; 36:63-75. [PMID: 32853170 DOI: 10.1515/reveh-2020-0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Aedes aegypti mosquitoes are primary vectors of dengue, yellow fever, chikungunya and Zika viruses. Ae. aegypti is highly anthropophilic and relies nearly exclusively on human blood meals and habitats for reproduction. Socioeconomic factors may be associated with the spread of Ae. aegypti due to their close relationship with humans. This paper describes and summarizes the published literature on the association between socioeconomic variables and the distribution of Ae. aegypti mosquitoes in the mainland United States. A comprehensive search of PubMed/Medline, Scopus, Web of Science, and EBSCO Academic Search Complete through June 12, 2019 was used to retrieve all articles published in English on the association of socioeconomic factors and the distribution of Ae. aegypti mosquitoes. Additionally, a hand search of mosquito control association websites was conducted in an attempt to identify relevant grey literature. Articles were screened for eligibility using the process described in the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Initially, 3,493 articles were identified through the database searches and previously known literature. After checking for duplicates, 2,145 articles remained. 570 additional records were identified through the grey literature search for a total of 2,715 articles. These articles were screened for eligibility using their titles and abstracts, and 2,677 articles were excluded for not meeting the eligibility criteria. Finally, the full text for each of the remaining articles (n=38) was read to determine eligibility. Through this screening process, 11 articles were identified for inclusion in this review. The findings for these 11 studies revealed inconsistent relationships between the studied socioeconomic factors and the distribution and abundance of Ae. aegypti. The findings of this review suggest a gap in the literature and understanding of the association between anthropogenic factors and the distribution of Ae. aegypti that could hinder efforts to implement effective public health prevention and control strategies should a disease outbreak occur.
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Affiliation(s)
- Whitney M Holeva-Eklund
- Department of Health Sciences, Northern Arizona University, Flagstaff, Arizona, USA
- School of Informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, Arizona, USA
| | - Timothy K Behrens
- Department of Health Sciences, Northern Arizona University, Flagstaff, Arizona, USA
- College of Health Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
| | - Crystal M Hepp
- School of Informatics, Computing, and Cyber Systems, Northern Arizona University, Flagstaff, Arizona, USA
- Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, Arizona, USA
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Hemmati C, Nikooei M, Al-Subhi AM, Al-Sadi AM. History and Current Status of Phytoplasma Diseases in the Middle East. Biology (Basel) 2021; 10:226. [PMID: 33804178 PMCID: PMC8000475 DOI: 10.3390/biology10030226] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/11/2021] [Accepted: 03/13/2021] [Indexed: 11/21/2022]
Abstract
Phytoplasmas that are associated with fruit crops, vegetables, cereal and oilseed crops, trees, ornamental, and weeds are increasing at an alarming rate in the Middle East. Up to now, fourteen 16Sr groups of phytoplasma have been identified in association with more than 164 plant species in this region. Peanut witches' broom phytoplasma strains (16SrII) are the prevalent group, especially in the south of Iran and Gulf states, and have been found to be associated with 81 host plant species. In addition, phytoplasmas belonging to the 16SrVI, 16SrIX, and 16SrXII groups have been frequently reported from a wide range of crops. On the other hand, phytoplasmas belonging to 16SrIV, 16SrV, 16SrX, 16SrXI, 16SrXIV, and 16SrXXIX groups have limited geographical distribution and host range. Twenty-two insect vectors have been reported as putative phytoplasma vectors in the Middle East, of which Orosius albicinctus can transmit diverse phytoplasma strains. Almond witches' broom, tomato big bud, lime witches' broom, and alfalfa witches' broom are known as the most destructive diseases. The review summarizes phytoplasma diseases in the Middle East, with specific emphasis on the occurrence, host range, and transmission of the most common phytoplasma groups.
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Affiliation(s)
- Chamran Hemmati
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Seeb, Muscat 123, Oman; (C.H.); (A.M.A.-S.)
- Minab Higher Education Center, Department of Agriculture, University of Hormozgan, Bandar Abbas 3995, Iran;
- Plant Protection Research Group, University of Hormozgan, Bandar Abbas 3995, Iran
| | - Mehrnoosh Nikooei
- Minab Higher Education Center, Department of Agriculture, University of Hormozgan, Bandar Abbas 3995, Iran;
| | - Ali M. Al-Subhi
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Seeb, Muscat 123, Oman; (C.H.); (A.M.A.-S.)
| | - Abdullah M. Al-Sadi
- Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Seeb, Muscat 123, Oman; (C.H.); (A.M.A.-S.)
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Janda JM, Abbott SL. The Changing Face of the Family Enterobacteriaceae (Order: " Enterobacterales"): New Members, Taxonomic Issues, Geographic Expansion, and New Diseases and Disease Syndromes. Clin Microbiol Rev 2021; 34:e00174-20. [PMID: 33627443 DOI: 10.1128/CMR.00174-20] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The family Enterobacteriaceae has undergone significant morphogenetic changes in its more than 85-year history, particularly during the past 2 decades (2000 to 2020). The development and introduction of new and novel molecular methods coupled with innovative laboratory techniques have led to many advances. We now know that the global range of enterobacteria is much more expansive than previously recognized, as they play important roles in the environment in vegetative processes and through widespread environmental distribution through insect vectors. In humans, many new species have been described, some associated with specific disease processes. Some established species are now observed in new infectious disease settings and syndromes. The results of molecular taxonomic and phylogenetics studies suggest that the current family Enterobacteriaceae should possibly be divided into seven or more separate families. The logarithmic explosion in the number of enterobacterial species described brings into question the relevancy, need, and mechanisms to potentially identify these taxa. This review covers the progression, transformation, and morphogenesis of the family from the seminal Centers for Disease Control and Prevention publication (J. J. Farmer III, B. R. Davis, F. W. Hickman-Brenner, A. McWhorter, et al., J Clin Microbiol 21:46-76, 1985, https://doi.org/10.1128/JCM.21.1.46-76.1985) to the present.
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Chen Q, Liu Y, Long Z, Yang H, Wei T. Viral Release Threshold in the Salivary Gland of Leafhopper Vector Mediates the Intermittent Transmission of Rice Dwarf Virus. Front Microbiol 2021; 12:639445. [PMID: 33613509 PMCID: PMC7890075 DOI: 10.3389/fmicb.2021.639445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/18/2021] [Indexed: 11/30/2022] Open
Abstract
Numerous piercing-sucking insects can persistently transmit viral pathogens in combination with saliva to plant phloem in an intermittent pattern. Insect vectors maintain viruliferous for life. However, the reason why insect vectors discontinuously transmit the virus remains unclear. Rice dwarf virus (RDV), a plant reovirus, was found to replicate and assemble the progeny virions in salivary gland cells of the leafhopper vector. We observed that the RDV virions moved into saliva-stored cavities in the salivary glands of leafhopper vectors via an exocytosis-like mechanism, facilitating the viral horizontal transmission to plant hosts during the feeding of leafhoppers. Interestingly, the levels of viral accumulation in the salivary glands of leafhoppers during the transmitting period were significantly lower than those of viruliferous individuals during the intermittent period. A putative viral release threshold, which was close to 1.79 × 104 copies/μg RNA was proposed from the viral titers in the salivary glands of 52 leafhoppers during the intermittent period. Thus, the viral release threshold was hypothesized to mediate the intermittent release of RDV from the salivary gland cells of leafhoppers. We anticipate that viral release threshold-mediated intermittent transmission by insect vectors is the conserved strategy for the epidemic and persistence of vector-borne viruses in nature.
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Affiliation(s)
| | | | | | | | - Taiyun Wei
- Fujian Province Key Laboratory of Plant Virology, Institute of Plant Virology, Vector-borne Virus Research Center, Fujian Agriculture and Forestry University, Fuzhou, China
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McGregor BL, Connelly CR, Kenney JL. Infection, Dissemination, and Transmission Potential of North American Culex quinquefasciatus, Culex tarsalis, and Culicoides sonorensis for Oropouche Virus. Viruses 2021; 13:v13020226. [PMID: 33540546 PMCID: PMC7912852 DOI: 10.3390/v13020226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 01/28/2021] [Accepted: 01/30/2021] [Indexed: 01/14/2023] Open
Abstract
Oropouche virus (OROV), a vector-borne Orthobunyavirus circulating in South and Central America, causes a febrile illness with high rates of morbidity but with no documented fatalities. Oropouche virus is transmitted by numerous vectors, including multiple genera of mosquitoes and Culicoides biting midges in South America. This study investigated the vector competence of three North American vectors, Culex tarsalis, Culex quinquefasciatus, and Culicoides sonorensis, for OROV. Cohorts of each species were fed an infectious blood meal containing 6.5 log10 PFU/mL OROV and incubated for 10 or 14 days. Culex tarsalis demonstrated infection (3.13%) but not dissemination or transmission potential at 10 days post infection (DPI). At 10 and 14 DPI, Cx. quinquefasciatus demonstrated 9.71% and 19.3% infection, 2.91% and 1.23% dissemination, and 0.97% and 0.82% transmission potential, respectively. Culicoides sonorensis demonstrated 86.63% infection, 83.14% dissemination, and 19.77% transmission potential at 14 DPI. Based on these data, Cx. tarsalis is unlikely to be a competent vector for OROV. Culex quinquefasciatus demonstrated infection, dissemination, and transmission potential, although at relatively low rates. Culicoides sonorensis demonstrated high infection and dissemination but may have a salivary gland barrier to the virus. These data have implications for the spread of OROV in the event of a North American introduction.
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Affiliation(s)
- Bethany L. McGregor
- Center for Grain and Animal Health Research, Agricultural Research Service, United States Department of Agriculture, Manhattan, KS 66502, USA;
| | - C. Roxanne Connelly
- Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA;
| | - Joan L. Kenney
- Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA;
- Correspondence: ; Tel.: +1-970-221-6465
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Pedrosa MC, Borges MAZ, Eiras ÁE, Caldas S, Cecílio AB, Brito MF, Ribeiro SP. Invasion of Tropical Montane Cities by Aedes aegypti and Aedes albopictus (Diptera: Culicidae) Depends on Continuous Warm Winters and Suitable Urban Biotopes. J Med Entomol 2021; 58:333-342. [PMID: 32785582 DOI: 10.1093/jme/tjaa135] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Indexed: 05/15/2023]
Abstract
We provide the first evidence of a recent invasion of Aedes aegypti (Linnaeus in Hasselquist, 1762) and Aedes albopictus (Skuse 1894), followed by dengue virus, in tropical montane cities in south-eastern Brazil, Mariana, and Ouro Preto, at mid and high altitudes, respectively. Long-term temperature variation, dengue public data, and sampling of immature and adult mosquitoes (ovitraps and mosquitraps) in contrasting habitats were used to explain the distribution of Aedes in what in these two cities. From 1961 to 2014, the annual temperature increased significantly due to increases in winter temperatures. In the 1990s/2000s, the winter temperature was 1.3°C warmer than in the 1960s, when it varied from 21.2 to 18.9°C. After 2007, the winter temperatures increased and ranged from 21.6 to 21.3°C. The first autochthonous dengue cases in Mariana and Ouro Preto were in 2007, followed by few occurrences until in 2012, when the mean numbers increased three-fold, and peak at 2013. The continuous 'warmer winter' may have trigged the Aedes invasion. Aedes species benefited from higher winter temperatures, which was an important driver of their invasion of the state of Minas Gerais in the 1980s and, more recently, in the remaining montane urban habitats in this region. In both 2009 and 2011, we found more Aedes in Mariana than Ouro Preto, and more Ae. albopictus in green areas and Ae. aegypti in houses, the expected pattern for well-established populations.
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Affiliation(s)
- Michelle Cristine Pedrosa
- Laboratory of Ecohealth, Canopy Insects and Natural Succession. Instituto de Ciências Exatas e Biológicas/NUPEB, Universidade Federal de Ouro Preto, Morro do Cruzeiro, Campus Universitário, Ouro Preto, MG, Brazil
| | - Magno Augusto Zazá Borges
- Laboratório de Ecologia e Controle Biológico de Insetos, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Campus Universitário Professor Darcy Ribeiro, Montes Claros, MG, Brazil
| | - Álvaro Eduardo Eiras
- Laboratório de Inovação Tecnológica e Empreendedorismo em Controle de Vetores (Lintec), Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais Federal, Belo Horizonte, MG, Brazil
| | - Sérgio Caldas
- Serviço de Biotecnologia e Saúde. Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Gameleira, Belo Horizonte, MG, Brazil
| | - Alzira Batista Cecílio
- Serviço de Biotecnologia e Saúde. Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Gameleira, Belo Horizonte, MG, Brazil
| | - Maria Fernanda Brito
- Laboratory of Ecohealth, Canopy Insects and Natural Succession. Instituto de Ciências Exatas e Biológicas/NUPEB, Universidade Federal de Ouro Preto, Morro do Cruzeiro, Campus Universitário, Ouro Preto, MG, Brazil
- Programa de Pós Graduação em Ecologia, Universidade Federal de Viçosa, Edifício Chorato Shimoya, Campus universitário, Viçosa, MG, Brazil
| | - Sérvio Pontes Ribeiro
- Laboratory of Ecohealth, Canopy Insects and Natural Succession. Instituto de Ciências Exatas e Biológicas/NUPEB, Universidade Federal de Ouro Preto, Morro do Cruzeiro, Campus Universitário, Ouro Preto, MG, Brazil
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Bragard C, Dehnen‐Schmutz K, Gonthier P, Jaques Miret JA, Justesen AF, MacLeod A, Magnusson CS, Milonas P, Navas‐Cortes JA, Parnell S, Potting R, Reignault PL, Thulke H, Van der Werf W, Civera AV, Yuen J, Zappalà L, Bosco D, Chiumenti M, Di Serio F, Galetto L, Marzachì C, Pautasso M, Jacques M. Pest categorisation of the non-EU phytoplasmas of tuber-forming Solanum spp. EFSA J 2020; 18:e06356. [PMID: 33376553 PMCID: PMC7757785 DOI: 10.2903/j.efsa.2020.6356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Following a request from the European Commission, the EFSA Panel on Plant Health performed a pest categorisation of four phytoplasmas of tuber-forming Solanum spp. known to occur only outside the EU or having a limited presence in the EU. The only tuber-forming species of Solanum reported to be phytoplasma infected is S. tuberosum. This opinion covers 'Candidatus Phytoplasma americanum', 'Ca. P. aurantifolia'-related strains (GD32; St_JO_10, 14, 17; PPT-SA; Rus-343F; PPT-GTO29, -GTO30, -SINTV; Potato Huayao Survey 2; Potato hair sprouts), 'Ca. P. fragariae'-related strains (YN-169, YN-10G) and 'Ca. P. pruni'-related strains (Clover yellow edge; Potato purple top AKpot7, MT117, AKpot6; PPT-COAHP, -GTOP). Phytoplasmas can be detected by molecular methods and are efficiently transmitted by vegetative propagation. Phytoplasmas are also transmitted in a persistent and propagative manner by some insects belonging to families within Cicadomorpha, Fulgoromorpha and Sternorrhyncha (order Hemiptera). No transovarial, pollen or seed transmission has been reported. The reported natural host range of the phytoplasmas categorised here varies from restricted ('Ca. P. americanum', and 'Ca. P. fragariae'-related strains) to wide ('Ca. P. aurantifolia'-related strains and 'Ca. P. pruni'-related strains), thus increasing the possible entry pathways in the latter case. S. tuberosum is widely cultivated in the EU. All the categorised phytoplasmas can enter and spread through the trade of host plants for planting, and by vectors. Establishment of these phytoplasmas is not expected to be limited by EU environmental conditions. The introduction of these phytoplasmas in the EU would have an economic impact. There are measures to reduce the risk of entry, establishment, spread and impact. Uncertainties result from limited information on distribution, biology and epidemiology. All the phytoplasmas categorised here meet the criteria evaluated by EFSA to qualify as potential Union quarantine pests, and they do not meet all the criteria to qualify as potential regulated non-quarantine pests, because they do not occur or are not known to be widespread in the EU.
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Stillson PT, Bloom EH, Illán JG, Szendrei Z. A novel plant pathogen management tool for vector management. Pest Manag Sci 2020; 76:3729-3737. [PMID: 32430988 DOI: 10.1002/ps.5922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/09/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Decision support systems often focus on insect control due to direct damage. However, when insects vector plant pathogens, these decision support systems must be tailored to disease management. However, a decision system that links diagnosticians to vector management is lacking and complicated by patterns of insect abundance over space and time. Here, we describe an approach that integrated monitoring of an insect pest (aster leafhopper; Macrosteles quadrilineatus, Forbes) that vectors aster yellows phytoplasma (Candidatus Phytoplasma spp.), with rapid disease diagnostics and web-based text messaging in two crops, carrots and celery. RESULTS From 2014-2019, a total of 8,343 aster leafhoppers were collected, 99 of these were infected with phytoplasma. Text messaging reduced the number of infected leafhoppers. When we compared infected leafhopper density across crops, their temporal patterns were most similar at a 2-week delay. Comparisons within crop indicated that in celery uninfected and infected leafhopper density was most similar at a 2-week delay, but there was no similar pattern in carrots. Leafhopper density and infectivity were not similar beyond individual farms. CONCLUSION Our results suggest that farmers should account for these temporal and spatial patterns when managing leafhoppers infected with aster yellows phytoplasma to improve pest management. By combining extensive monitoring, with rapid disease diagnostics, and text messaging, we demonstrate the value of our decision support tool. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Patrick T Stillson
- Department of Entomology, Michigan State University, East Lansing, MI, USA
| | - Elias H Bloom
- Department of Entomology, Michigan State University, East Lansing, MI, USA
| | - Javier G Illán
- Department of Entomology, Washington State University, Pullman, WA, USA
| | - Zsofia Szendrei
- Department of Entomology, Michigan State University, East Lansing, MI, USA
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Grau-Bové X, Tomlinson S, O’Reilly AO, Harding NJ, Miles A, Kwiatkowski D, Donnelly MJ, Weetman D. Evolution of the Insecticide Target Rdl in African Anopheles Is Driven by Interspecific and Interkaryotypic Introgression. Mol Biol Evol 2020; 37:2900-2917. [PMID: 32449755 PMCID: PMC7530614 DOI: 10.1093/molbev/msaa128] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The evolution of insecticide resistance mechanisms in natural populations of Anopheles malaria vectors is a major public health concern across Africa. Using genome sequence data, we study the evolution of resistance mutations in the resistance to dieldrin locus (Rdl), a GABA receptor targeted by several insecticides, but most notably by the long-discontinued cyclodiene, dieldrin. The two Rdl resistance mutations (296G and 296S) spread across West and Central African Anopheles via two independent hard selective sweeps that included likely compensatory nearby mutations, and were followed by a rare combination of introgression across species (from A. gambiae and A. arabiensis to A. coluzzii) and across nonconcordant karyotypes of the 2La chromosomal inversion. Rdl resistance evolved in the 1950s as the first known adaptation to a large-scale insecticide-based intervention, but the evolutionary lessons from this system highlight contemporary and future dangers for management strategies designed to combat development of resistance in malaria vectors.
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Affiliation(s)
- Xavier Grau-Bové
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
| | - Sean Tomlinson
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- Centre for Health Informatics, Computing and Statistics, Lancaster University, Lancaster, United Kingdom
| | - Andrias O O’Reilly
- School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | - Nicholas J Harding
- Big Data Institute, University of Oxford, Li Ka Shing Centre for Health Information and Discovery, Oxford, United Kingdom
| | - Alistair Miles
- Big Data Institute, University of Oxford, Li Ka Shing Centre for Health Information and Discovery, Oxford, United Kingdom
- Wellcome Sanger Institute, Hinxton, United Kingdom
| | - Dominic Kwiatkowski
- Big Data Institute, University of Oxford, Li Ka Shing Centre for Health Information and Discovery, Oxford, United Kingdom
- Wellcome Sanger Institute, Hinxton, United Kingdom
| | - Martin J Donnelly
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- Wellcome Sanger Institute, Hinxton, United Kingdom
| | - David Weetman
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom
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Mittapelly P, Rajarapu SP. Applications of Proteomic Tools to Study Insect Vector-Plant Virus Interactions. Life (Basel) 2020; 10:E143. [PMID: 32784674 PMCID: PMC7459587 DOI: 10.3390/life10080143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 07/24/2020] [Accepted: 08/05/2020] [Indexed: 11/20/2022] Open
Abstract
Proteins are crucial players of biological interactions within and between the organisms and thus it is important to understand the role of proteins in successful partnerships, such as insect vectors and their plant viruses. Proteomic approaches have identified several proteins at the interface of virus acquisition and transmission by their insect vectors which could be potential molecular targets for sustainable pest and viral disease management strategies. Here we review the proteomic techniques used to study the interactions of insect vector and plant virus. Our review will focus on the techniques available to identify the infection, global changes at the proteome level in insect vectors, and protein-protein interactions of insect vectors and plant viruses. Furthermore, we also review the integration of other techniques with proteomics and the available bioinformatic tools to analyze the proteomic data.
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Affiliation(s)
- Priyanka Mittapelly
- Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH 44691, USA;
- USDA APHIS PPQ, 5936 Ford Ct, Ste. 200, Brighton, MI 48116, USA
| | - Swapna Priya Rajarapu
- Department of Entomology, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH 44691, USA;
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
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Gadhave KR, Gautam S, Rasmussen DA, Srinivasan R. Aphid Transmission of Potyvirus: The Largest Plant-Infecting RNA Virus Genus. Viruses 2020; 12:E773. [PMID: 32708998 DOI: 10.3390/v12070773] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/12/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022] Open
Abstract
Potyviruses are the largest group of plant infecting RNA viruses that cause significant losses in a wide range of crops across the globe. The majority of viruses in the genus Potyvirus are transmitted by aphids in a non-persistent, non-circulative manner and have been extensively studied vis-à-vis their structure, taxonomy, evolution, diagnosis, transmission, and molecular interactions with hosts. This comprehensive review exclusively discusses potyviruses and their transmission by aphid vectors, specifically in the light of several virus, aphid and plant factors, and how their interplay influences potyviral binding in aphids, aphid behavior and fitness, host plant biochemistry, virus epidemics, and transmission bottlenecks. We present the heatmap of the global distribution of potyvirus species, variation in the potyviral coat protein gene, and top aphid vectors of potyviruses. Lastly, we examine how the fundamental understanding of these multi-partite interactions through multi-omics approaches is already contributing to, and can have future implications for, devising effective and sustainable management strategies against aphid-transmitted potyviruses to global agriculture.
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Abstract
Orthotospoviruses are plant-infecting members of the family Tospoviridae (order Bunyavirales), have a broad host range and are vectored by polyphagous thrips in a circulative-propagative manner. Because diverse hosts and vectors impose heterogeneous selection constraints on viral genomes, the evolutionary arms races between hosts and their pathogens might be manifested as selection for rapid changes in key genes. These observations suggest that orthotospoviruses contain key genetic components that rapidly mutate to mediate host adaptation and vector transmission. Using complete genome sequences, we profiled genomic variation in orthotospoviruses. Results show that the three genomic segments contain hypervariable areas at homologous locations across species. Remarkably, the highest nucleotide variation mapped to the intergenic region of RNA segments S and M, which fold into a hairpin. Secondary structure analyses showed that the hairpin is a dynamic structure with multiple functional shapes formed by stems and loops, contains sites under positive selection and covariable sites. Accumulation and tolerance of mutations in the intergenic region is a general feature of orthotospoviruses and might mediate adaptation to host plants and insect vectors.
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Jones TKL, Medina RF. Corn Stunt Disease: An Ideal Insect-Microbial-Plant Pathosystem for Comprehensive Studies of Vector-Borne Plant Diseases of Corn. Plants (Basel) 2020; 9:plants9060747. [PMID: 32545891 PMCID: PMC7356856 DOI: 10.3390/plants9060747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/05/2020] [Accepted: 06/12/2020] [Indexed: 11/16/2022]
Abstract
Over 700 plant diseases identified as vector-borne negatively impact plant health and food security globally. The pest control of vector-borne diseases in agricultural settings is in urgent need of more effective tools. Ongoing research in genetics, molecular biology, physiology, and vector behavior has begun to unravel new insights into the transmission of phytopathogens by their insect vectors. However, the intricate mechanisms involved in phytopathogen transmission for certain pathosystems warrant further investigation. In this review, we propose the corn stunt pathosystem (Zea mays-Spiroplasma kunkelii-Dalbulus maidis) as an ideal model for dissecting the molecular determinants and mechanisms underpinning the persistent transmission of a mollicute by its specialist insect vector to an economically important monocotyledonous crop. Corn stunt is the most important disease of corn in the Americas and the Caribbean, where it causes the severe stunting of corn plants and can result in up to 100% yield loss. A comprehensive study of the corn stunt disease system will pave the way for the discovery of novel molecular targets for genetic pest control targeting either the insect vector or the phytopathogen.
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Affiliation(s)
- Tara-kay L. Jones
- Department of Entomology, Texas A&M University, TAMU 2475, College Station, TX 77843-2475, USA;
- Texas A&M AgriLife Research—Weslaco, 2415 E. Business 83, Weslaco, TX 78596-8344, USA
| | - Raul F. Medina
- Department of Entomology, Texas A&M University, TAMU 2475, College Station, TX 77843-2475, USA;
- Correspondence: ; Tel.: +1-979-845-4775
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Bodino N, Cavalieri V, Dongiovanni C, Saladini MA, Simonetto A, Volani S, Plazio E, Altamura G, Tauro D, Gilioli G, Bosco D. Spittlebugs of Mediterranean Olive Groves: Host-Plant Exploitation throughout the Year. Insects 2020; 11:insects11020130. [PMID: 32085449 PMCID: PMC7074542 DOI: 10.3390/insects11020130] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/05/2020] [Accepted: 02/13/2020] [Indexed: 11/16/2022]
Abstract
Spittlebugs are the vectors of the bacterium Xylella fastidiosa Wells in Europe, the causal agent of olive dieback epidemic in Apulia, Italy. Selection and distribution of different spittlebug species on host-plants were investigated during field surveys in 2016-2018 in four olive orchards of Apulia and Liguria Regions of Italy. The nymphal population in the herbaceous cover was estimated using quadrat samplings. Adults were collected by sweeping net on three different vegetational components: herbaceous cover, olive canopy, and wild woody plants. Three species of spittlebugs were collected: Philaenus spumarius L., Neophilaenus campestris (Fallén), and Aphrophora alni (L.) (Hemiptera: Aphrophoridae). Philaenus spumarius was the predominant species both in Apulia and Liguria olive groves. Nymphal stages are highly polyphagous, selecting preferentially Asteraceae Fabaceae plant families, in particular some genera, e.g., Picris, Crepis, Sonchus, Bellis, Cichorium, and Medicago. Host-plant preference of nymphs varies according to the Region and through time and nymphal instar. In the monitored sites, adults peak on olive trees earlier in Apulia (i.e., during inflorescence emergence) than in Liguria (i.e., during flowering and beginning of fruit development). Principal alternative woody hosts are Quercus spp. and Pistacia spp. Knowledge concerning plant selection and ecological traits of spittlebugs in different Mediterranean olive production areas is needed to design effective and precise control strategies against X. fastidiosa vectors in olive groves, such as ground cover modifications to reduce populations of spittlebug vectors.
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Affiliation(s)
- Nicola Bodino
- CNR—Istituto per la Protezione Sostenibile delle Piante, Strada delle Cacce, 73, 10135 Torino, Italy; (N.B.); (E.P.)
| | - Vincenzo Cavalieri
- CNR—Istituto per la Protezione Sostenibile delle Piante, SS Bari, Via Amendola 122/D, 70126 Bari, Italy; (V.C.); (G.A.)
| | - Crescenza Dongiovanni
- CRSFA—Centro di Ricerca, Sperimentazione e Formazione in Agricoltura Basile Caramia, Via Cisternino, 281, 70010 Locorotondo (Bari), Italy; (C.D.); (D.T.)
| | - Matteo Alessandro Saladini
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy;
| | - Anna Simonetto
- Agrifood Lab, Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, 25123 Brescia, Italy; (A.S.); (S.V.); (G.G.)
| | - Stefania Volani
- Agrifood Lab, Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, 25123 Brescia, Italy; (A.S.); (S.V.); (G.G.)
| | - Elisa Plazio
- CNR—Istituto per la Protezione Sostenibile delle Piante, Strada delle Cacce, 73, 10135 Torino, Italy; (N.B.); (E.P.)
| | - Giuseppe Altamura
- CNR—Istituto per la Protezione Sostenibile delle Piante, SS Bari, Via Amendola 122/D, 70126 Bari, Italy; (V.C.); (G.A.)
| | - Daniele Tauro
- CRSFA—Centro di Ricerca, Sperimentazione e Formazione in Agricoltura Basile Caramia, Via Cisternino, 281, 70010 Locorotondo (Bari), Italy; (C.D.); (D.T.)
| | - Gianni Gilioli
- Agrifood Lab, Dipartimento di Medicina Molecolare e Traslazionale, Università degli Studi di Brescia, 25123 Brescia, Italy; (A.S.); (S.V.); (G.G.)
| | - Domenico Bosco
- CNR—Istituto per la Protezione Sostenibile delle Piante, Strada delle Cacce, 73, 10135 Torino, Italy; (N.B.); (E.P.)
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università degli Studi di Torino, Largo Paolo Braccini, 2, 10095 Grugliasco, Italy;
- Correspondence:
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Hammerbacher A, Coutinho TA, Gershenzon J. Roles of plant volatiles in defence against microbial pathogens and microbial exploitation of volatiles. Plant Cell Environ 2019; 42:2827-2843. [PMID: 31222757 DOI: 10.1111/pce.13602] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 05/22/2023]
Abstract
Plants emit a large variety of volatile organic compounds during infection by pathogenic microbes, including terpenes, aromatics, nitrogen-containing compounds, and fatty acid derivatives, as well as the volatile plant hormones, methyl jasmonate, and methyl salicylate. Given the general antimicrobial activity of plant volatiles and the timing of emission following infection, these compounds have often been assumed to function in defence against pathogens without much solid evidence. In this review, we critically evaluate current knowledge on the toxicity of volatiles to fungi, bacteria, and viruses and their role in plant resistance as well as how they act to induce systemic resistance in uninfected parts of the plant and in neighbouring plants. We also discuss how microbes can detoxify plant volatiles and exploit them as nutrients, attractants for insect vectors, and inducers of volatile emissions, which stimulate immune responses that make plants more susceptible to infection. Although much more is known about plant volatile-herbivore interactions, knowledge of volatile-microbe interactions is growing and it may eventually be possible to harness plant volatiles to reduce disease in agriculture and forestry. Future research in this field can be facilitated by making use of the analytical and molecular tools generated by the prolific research on plant-herbivore interactions.
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Affiliation(s)
- Almuth Hammerbacher
- Department of Zoology and Entomology, Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, 0002, South Africa
| | - Teresa A Coutinho
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute, Centre for Microbial Ecology and Genetics, University of Pretoria, Pretoria, 0002, South Africa
| | - Jonathan Gershenzon
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Jena, 07745, Germany
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Muñoz C, Martínez-de la Puente J, Figuerola J, Pérez-Cutillas P, Navarro R, Ortuño M, Bernal LJ, Ortiz J, Soriguer R, Berriatua E. Molecular xenomonitoring and host identification of Leishmania sand fly vectors in a Mediterranean periurban wildlife park. Transbound Emerg Dis 2019; 66:2546-2561. [PMID: 31376338 DOI: 10.1111/tbed.13319] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 07/17/2019] [Accepted: 07/19/2019] [Indexed: 12/24/2022]
Abstract
The epidemiological cycle of zoonotic phlebotomine-borne Leishmania infantum is a complex system in which domestic animals and wildlife interact and participate in its maintenance and transmission. In this study, we combined entomological surveillance, xenomonitoring of L. infantum and identification of host feeding sources of engorged females to investigate the potential contribution of a periurban wildlife park to leishmaniosis in neighbouring residential areas. Overall, 7,309 sand flies were collected in 111 trap-days during the summers of 2016-2018 in an endemic area in south-east Spain. Five different sand fly species were captured, with Phlebotomus perniciosus, the main L. infantum vector in this region, representing the most common species. Sand fly distribution was spatially heterogeneous in terms of species, sexes and female physiological stage (unfed, gravid and engorged females) and related to host distribution and management, and environmental features. None of the 602 sand flies analysed for L. infantum infection by kinetoplast real-time PCR were positive. We used molecular tools to identify the vertebrate hosts of sand flies and identified 17 host species, mainly mammals. Human DNA was not identified in engorged sand flies. This study provides evidence that wildlife parks in south-east Spain are ideal grounds for sand fly vectors but do not necessarily increase L. infantum infection risk to humans and dogs living in surrounding residential areas. This is probably because vectors feed mostly on non-L. infantum competent hosts and this should be investigated for a better understanding of the contribution of wildlife parks to the local epidemiology of L. infantum.
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Affiliation(s)
- Clara Muñoz
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Universidad de Murcia, Murcia, Spain
| | - Josué Martínez-de la Puente
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (EBD-CSIC), Seville, Spain.,Ciber de Epidemiología y Salud Pública (CIBERESP), Seville, Spain
| | - Jordi Figuerola
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (EBD-CSIC), Seville, Spain.,Ciber de Epidemiología y Salud Pública (CIBERESP), Seville, Spain
| | - Pedro Pérez-Cutillas
- Centro de Edafología y Biología Aplicada del Segura, Consejo Superior de Investigaciones Científicas (CEBAS-CSIC), Murcia, Spain.,Departamento de Geografía, Facultad de Letras, Universidad de Murcia, Murcia, Spain
| | | | - María Ortuño
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Universidad de Murcia, Murcia, Spain
| | - Luis J Bernal
- Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria, Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Universidad de Murcia, Murcia, Spain
| | - Juana Ortiz
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Universidad de Murcia, Murcia, Spain
| | - Ramón Soriguer
- Estación Biológica de Doñana, Consejo Superior de Investigaciones Científicas (EBD-CSIC), Seville, Spain.,Ciber de Epidemiología y Salud Pública (CIBERESP), Seville, Spain
| | - Eduardo Berriatua
- Departamento de Sanidad Animal, Facultad de Veterinaria, Campus de Excelencia Internacional Regional "Campus Mare Nostrum", Universidad de Murcia, Murcia, Spain
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Youssefi MR, Moghaddas E, Tabari MA, Moghadamnia AA, Hosseini SM, Farash BRH, Ebrahimi MA, Mousavi NN, Fata A, Maggi F, Petrelli R, Dall'Acqua S, Benelli G, Sut S. In Vitro and In Vivo Effectiveness of Carvacrol, Thymol and Linalool against Leishmania infantum. Molecules 2019; 24:E2072. [PMID: 31151304 DOI: 10.3390/molecules24112072] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND One of the most important causative agents of visceral leishmaniasis (VL) is Leishmania infantum, which is mainly spread by Phlebotomus and Lutzomyia sandflies in the Old and New World, respectively. Novel and effective drugs to manage this neglected vector-borne disease are urgently required. In this study, we evaluated the toxicity of carvacrol, thymol and linalool, three common essential oil constituents, on amastigotes and promastigotes of L. infantum. Methods: in vitro experiments were performed by 24 h MTT assay. Carvacrol, thymol and linalool at concentrations ranging from 1.3 to 10 μg/mL were tested on promastigotes of L. infantum. For in vivo test, two groups of hamsters (Mesocricetus auratus) received 100 mg/kg of body weight/day of carvacrol and thymol as intraperitoneal injection on day 7 post-infection, followed by a 48 h later injection. The third group was treated with the glucantime as standard drug (500 mg/kg) and the last group (control) just received normal saline. On the 16th day, the number of parasites and histopathological changes in liver and spleen were investigated. RESULTS 24 h MTT assay showed promising antileishmanial activity of thymol and carvacrol, with IC50 values of 7.2 (48 μM) and 9.8 μg/mL (65 μM), respectively. Linalool at all concentrations did not affect L. infantum promastigote viability. In vivo toxicity data of carvacrol and thymol showed that the former at 100 mg/kg was the safest and most effective treatment with little side effects on the liver. CONCLUSIONS Overall, thymol and carvacrol are highly promising candidates for the development of effective and safe drugs in the fight against VL.
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Hartman DA, Rice LM, DeMaria J, Borland EM, Bergren NA, Fagre AC, Robb LL, Webb CT, Kading RC. Entomological risk factors for potential transmission of Rift Valley fever virus around concentrations of livestock in Colorado. Transbound Emerg Dis 2019; 66:1709-1717. [PMID: 31002468 DOI: 10.1111/tbed.13206] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/11/2019] [Accepted: 04/12/2019] [Indexed: 01/07/2023]
Abstract
Rift Valley fever virus (RVFV) poses a major threat of introduction to several continents, including North America. Such an introduction could cause significant losses to the livestock industry, in addition to substantial human morbidity and mortality. Because of the opportunistic blood host selection of Culex tarsalis mosquitoes, we hypothesized that this species could be an important bridge vector of RVFV near feedlots in the event of an introduction. We investigated the mosquito community composition at livestock feedlots and surrounding natural and residential areas to determine differences in mosquito relative abundance and blood feeding patterns attributed to cattle feeding operations. DNA extracted from abdomens of blood-fed mosquitoes were sequenced to determine host identity. Multivariate regression analyses revealed differences between mosquito community assemblages at feedlots and non-feedlot sites (p < 0.05), with this effect driven largely by differential abundances of Aedes vexans (padj < 0.05). Mosquito diversity was lower on feedlots than surrounding areas for three out of four feedlots. Culex tarsalis was abundant at both feedlots and nearby sites. Diverse vertebrate blood meals were detected in Cx. tarsalis at non-feedlot sites, with a shift towards feeding on cattle at feedlots. These data support a potential for Cx. tarsalis to serve as a bridge vector of RVFV between livestock and humans in Colorado.
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Affiliation(s)
- Daniel A Hartman
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado
| | - Lauren M Rice
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Justin DeMaria
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Erin M Borland
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado
| | - Nicholas A Bergren
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado
| | - Anna C Fagre
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado
| | - Lucy L Robb
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Colleen T Webb
- Department of Biology, Colorado State University, Fort Collins, Colorado
| | - Rebekah C Kading
- Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, Colorado
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46
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Gilmer D, Ogliastro M. [17 th plant virology meeting report]. Virologie (Montrouge) 2019; 23:45-9. [PMID: 31145091 DOI: 10.1684/vir.2019.0767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
RVV Plant virology meeting (January 27-31, 2019, Aussois, France) allows researchers, engineers, technicians, students and post-docs to exchange around oral and poster presentations. These convivial meetings are 30 years old and have a nice future.
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47
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Worrall EA, Bravo-Cazar A, Nilon AT, Fletcher SJ, Robinson KE, Carr JP, Mitter N. Exogenous Application of RNAi-Inducing Double-Stranded RNA Inhibits Aphid-Mediated Transmission of a Plant Virus. Front Plant Sci 2019; 10:265. [PMID: 30930914 PMCID: PMC6429036 DOI: 10.3389/fpls.2019.00265] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 02/19/2019] [Indexed: 05/19/2023]
Abstract
Plant viruses are difficult to control, and they decrease both the quality and yield of crops, thus threatening global food security. A new approach that uses topical application of double-stranded RNA (dsRNA) to induce antiviral RNA-interference has been shown to be effective at preventing virus infection in a range of plants following mechanical inoculation. In this study, topical application of dsRNA was effective against mechanical inoculation and aphid-mediated inoculation with the potyvirus bean common mosaic virus (BCMV). Topical application of dsRNAs targeting either the coding region of the potyviral nuclear inclusion b (NIb) protein (BCMVNIb-dsRNA) or the coat protein (CP) coding region (BCMVCP-dsRNA) protected Nicotiana benthamiana and cowpea (Vigna unguiculata) plants against mechanical inoculation with BCMV. BCMVCP-dsRNA was selected for subsequent aphid transmission experiments. BCMVCP-dsRNA was loaded onto layered double hydroxide nanoparticles to form BCMVCP-BioClay which is a more stable formulation for delivering dsRNA than naked dsRNA. BCMVCP-BioClay was shown to be successful in protecting plants against BCMV transmission by the aphid Myzus persicae. Spraying detached N. benthamiana leaves with BCMVCP-BioClay 5 days prior to exposure to viruliferous aphids protected the leaves from infection by BCMV. Importantly, spraying of intact N. benthamiana and cowpea plants with BCMVCP-BioClay 5 days prior to exposure to viruliferous aphids protected plants of both species from BCMV infection. This study demonstrates that topical application of dsRNA using BioClay protects plants from aphid-mediated virus transmission, which is an important first step toward developing practical application of this approach in crop protection.
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Affiliation(s)
- Elizabeth A. Worrall
- Centre of Horticultural Science, Queensland Alliance of Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Ana Bravo-Cazar
- Department of Plant Sciences, Cambridge University, Cambridge, United Kingdom
| | - Alexander T. Nilon
- Centre of Horticultural Science, Queensland Alliance of Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Stephen J. Fletcher
- Centre of Horticultural Science, Queensland Alliance of Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - Karl E. Robinson
- Centre of Horticultural Science, Queensland Alliance of Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
| | - John P. Carr
- Department of Plant Sciences, Cambridge University, Cambridge, United Kingdom
- *Correspondence: Neena Mitter,
| | - Neena Mitter
- Centre of Horticultural Science, Queensland Alliance of Agriculture and Food Innovation, The University of Queensland, Brisbane, QLD, Australia
- *Correspondence: Neena Mitter,
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Mutuku JM, Wamonje FO, Mukeshimana G, Njuguna J, Wamalwa M, Choi SK, Tungadi T, Djikeng A, Kelly K, Domelevo Entfellner JB, Ghimire SR, Mignouna HD, Carr JP, Harvey JJW. Metagenomic Analysis of Plant Virus Occurrence in Common Bean ( Phaseolus vulgaris) in Central Kenya. Front Microbiol 2018; 9:2939. [PMID: 30581419 PMCID: PMC6293961 DOI: 10.3389/fmicb.2018.02939] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/15/2018] [Indexed: 11/13/2022] Open
Abstract
Two closely related potyviruses, bean common mosaic virus (BCMV) and bean common mosaic necrosis virus (BCMNV), are regarded as major constraints on production of common bean (Phaseolus vulgaris L.) in Eastern and Central Africa, where this crop provides a high proportion of dietary protein as well as other nutritional, agronomic, and economic benefits. Previous studies using antibody-based assays and indicator plants indicated that BCMV and BCMNV are both prevalent in bean fields in the region but these approaches cannot distinguish between these potyviruses or detect other viruses that may threaten the crop. In this study, we utilized next generation shotgun sequencing for a metagenomic examination of viruses present in bean plants growing at two locations in Kenya: the University of Nairobi Research Farm in Nairobi's Kabete district and at sites in Kirinyaga County. RNA was extracted from leaves of bean plants exhibiting apparent viral symptoms and sequenced on the Illumina MiSeq platform. We detected BCMNV, cucumber mosaic virus (CMV), and Phaseolus vulgaris alphaendornaviruses 1 and 2 (PvEV1 and 2), with CMV present in the Kirinyaga samples. The CMV strain detected in this study was most closely related to Asian strains, which suggests that it may be a recent introduction to the region. Surprisingly, and in contrast to previous surveys, BCMV was not detected in plants at either location. Some plants were infected with PvEV1 and 2. The detection of PvEV1 and 2 suggests these seed transmitted viruses may be more prevalent in Eastern African bean germplasm than previously thought.
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Affiliation(s)
- J. Musembi Mutuku
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Francis O. Wamonje
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Gerardine Mukeshimana
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
| | - Joyce Njuguna
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
| | - Mark Wamalwa
- Biotechnology Department, Kenyatta University, Nairobi, Kenya
| | - Seung-Kook Choi
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
- Department of Vegetable Research, National Institute of Horticultural and Herbal Science, Rural Development Agency, Wanju County, South Korea
| | - Trisna Tungadi
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Appolinaire Djikeng
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
| | - Krys Kelly
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | | | - Sita R. Ghimire
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
| | - Hodeba D. Mignouna
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
| | - John P. Carr
- Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom
| | - Jagger J. W. Harvey
- Biosciences Eastern and Central Africa, International Livestock Research Institute, Nairobi, Kenya
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Rossmann S, Dees MW, Perminow J, Meadow R, Brurberg MB. Soft Rot Enterobacteriaceae Are Carried by a Large Range of Insect Species in Potato Fields. Appl Environ Microbiol 2018; 84:e00281-18. [PMID: 29625979 PMCID: PMC5981085 DOI: 10.1128/aem.00281-18] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Accepted: 03/30/2018] [Indexed: 11/20/2022] Open
Abstract
Pathogenic soft rot Enterobacteriaceae (SRE) belonging to the genera Pectobacterium and Dickeya cause diseases in potato and numerous other crops. Seed potatoes are the most important source of infection, but how pathogen-free tubers initially become infected remains an enigma. Since the 1920s, insects have been hypothesized to contribute to SRE transmission. To validate this hypothesis and to map the insect species potentially involved in SRE dispersal, we have analyzed the occurrence of SRE in insects recovered from potato fields over a period of 2 years. Twenty-eight yellow sticky traps were set up in 10 potato fields throughout Norway to attract and trap insects. Total DNA recovered from over 2,000 randomly chosen trapped insects was tested for SRE, using a specific quantitative PCR (qPCR) TaqMan assay, and insects that tested positive were identified by DNA barcoding. Although the occurrence of SRE-carrying insects varied, they were found in all the tested fields. While Delia species were dominant among the insects that carried the largest amount of SRE, more than 80 other SRE-carrying insect species were identified, and they had different levels of abundance. Additionally, the occurrence of SRE in three laboratory-reared insect species was analyzed, and this suggested that SRE are natural members of some insect microbiomes, with herbivorous Delia floralis carrying more SRE than the cabbage moth (Plutella xylostella) and carnivorous green lacewing larvae (Chrysoperla carnea). In summary, the high proportion, variety, and ubiquity of insects that carried SRE show the need to address this source of the pathogens to reduce the initial infection of seed material.IMPORTANCE Soft rot Enterobacteriaceae are among the most important pathogens of a wide range of vegetables and fruits. The bacteria cause severe rots in the field and in storage, leading to considerable harvest losses. In potato, efforts to understand how soft rot bacteria infect and spread between healthy plants have been made for over a century. Early on, fly larvae were implicated in the transmission of these bacteria. This work aimed at investigating the occurrence of soft rot bacteria in insects present in potato fields and at identifying the species of these insects to better understand the potential of this suspected source of transmission. In all tested potato fields, a large proportion of insects were found to carry soft rot bacteria. This suggests a need to give more weight to the role of insects in soft rot ecology and epidemiology to design more effective pest management strategies that integrate this factor.
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Affiliation(s)
- Simeon Rossmann
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
- Department of Plant Sciences, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Merete Wiken Dees
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
| | - Juliana Perminow
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
| | - Richard Meadow
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
- Department of Plant Sciences, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - May Bente Brurberg
- Division of Biotechnology and Plant Health, Norwegian Institute of Bioeconomy Research (NIBIO), Ås, Norway
- Department of Plant Sciences, Norwegian University of Life Sciences (NMBU), Ås, Norway
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Nanfack Minkeu F, Vernick KD. A Systematic Review of the Natural Virome of Anopheles Mosquitoes. Viruses 2018; 10:E222. [PMID: 29695682 DOI: 10.3390/v10050222] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 04/20/2018] [Accepted: 04/21/2018] [Indexed: 12/15/2022] Open
Abstract
Anopheles mosquitoes are vectors of human malaria, but they also harbor viruses, collectively termed the virome. The Anopheles virome is relatively poorly studied, and the number and function of viruses are unknown. Only the o’nyong-nyong arbovirus (ONNV) is known to be consistently transmitted to vertebrates by Anopheles mosquitoes. A systematic literature review searched four databases: PubMed, Web of Science, Scopus, and Lissa. In addition, online and print resources were searched manually. The searches yielded 259 records. After screening for eligibility criteria, we found at least 51 viruses reported in Anopheles, including viruses with potential to cause febrile disease if transmitted to humans or other vertebrates. Studies to date have not provided evidence that Anopheles consistently transmit and maintain arboviruses other than ONNV. However, anthropophilic Anopheles vectors of malaria are constantly exposed to arboviruses in human bloodmeals. It is possible that in malaria-endemic zones, febrile symptoms may be commonly misdiagnosed. It is also possible that anophelines may be inherently less competent arbovirus vectors than culicines, but if true, the biological basis would warrant further study. This systematic review contributes a context to characterize the biology, knowledge gaps, and potential public health risk of Anopheles viruses.
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