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Wernet V, Fischer R. Establishment of Arthrobotrys flagrans as biocontrol agent against the root pathogenic nematode Xiphinema index. Environ Microbiol 2023; 25:283-293. [PMID: 36354014 DOI: 10.1111/1462-2920.16282] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Accepted: 11/08/2022] [Indexed: 11/11/2022]
Abstract
Plant-parasitic nematodes cause devastating agricultural damage worldwide. Only a few synthetic nematicides can be used and their application is limited in fields. Therefore, there is a need for sustainable and environment-friendly alternatives. Nematode-trapping fungi (NTF) are natural predators of nematodes. They capture and digest them with their hyphae and are starting to being used as bio-control agents. In this study, we applied the NTF Arthrobotrys flagrans (Duddingtonia flagrans) against the wine pathogenic nematode Xiphinema index. A. flagrans reduced the number of X. index juveniles in pot cultures of Ficus carica, an alternative host plant for X. index, significantly. Sodium-alginate pellets with A. flagrans spores were produced for vineyard soil inoculation under laboratory conditions. The NTF A. conoides, A. musiformis and A. superba were enriched from several soil samples, showing their natural presence. Trap formation is an energy-consuming process and depends upon various biotic and abiotic stimuli. Here, we show that bacteria of the genus Delftia, Bacillus, Pseudomonas, Enterobacter and Serratia induced trap formation in NTF like A. conoides and A. oligospora but not in A. flagrans in the absence of nematodes. The application of NTF along with such bacteria could be a combinatorial way of efficient biocontrol in nematode-infested soil.
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Affiliation(s)
- Valentin Wernet
- Department of Microbiology, Institute for Applied Biosciences, Karlsruhe, Germany
| | - Reinhard Fischer
- Department of Microbiology, Institute for Applied Biosciences, Karlsruhe, Germany
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2
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Potential Implications and Management of Grapevine Viruses in Mexico: A Review. INTERNATIONAL JOURNAL OF PLANT BIOLOGY 2023. [DOI: 10.3390/ijpb14010015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Worldwide, virus infections in grapevines are of concern due to the potential for economic loss. Although the grape industry in Mexico is relatively small and focused mainly on the local market, production dates back to the time of the Spanish colonization. This manuscript discusses the findings on grapevine viruses in Mexico. Nine viruses have been identified in the last fifty years, including grapevine red blotch virus (GRBV), grapevine leafroll-associated virus 3 (GLRaV-3), grapevine fanleaf virus (GFLV), and grapevine virus A (GVA). Important information is provided about these viruses and viral pathogens that have not yet been reported in Mexico, but represent an ongoing threat to plant health and grapevine production in other viticultural regions of the world. Strategies for virus control in vineyards are described. The information discussed here should be shared with growers and stakeholders to prevent future negative impacts on the Mexican grapevine industry and to save ancient grapevine accessions.
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Kubina J, Hily JM, Mustin P, Komar V, Garcia S, Martin IR, Poulicard N, Velt A, Bonnet V, Mercier L, Lemaire O, Vigne E. Characterization of Grapevine Fanleaf Virus Isolates in ‘Chardonnay’ Vines Exhibiting Severe and Mild Symptoms in Two Vineyards. Viruses 2022; 14:v14102303. [PMID: 36298857 PMCID: PMC9609649 DOI: 10.3390/v14102303] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/14/2022] [Accepted: 10/18/2022] [Indexed: 12/03/2022] Open
Abstract
Fanleaf degeneration is a complex viral disease of Vitis spp. that detrimentally impacts fruit yield and reduces the productive lifespan of most vineyards worldwide. In France, its main causal agent is grapevine fanleaf virus (GFLV). In the past, field experiments were conducted to explore cross-protection as a management strategy of fanleaf degeneration, but results were unsatisfactory because the mild virus strain negatively impacted fruit yield. In order to select new mild GFLV isolates, we examined two old ‘Chardonnay’ parcels harbouring vines with distinct phenotypes. Symptoms and agronomic performances were monitored over the four-year study on 21 individual vines that were classified into three categories: asymptomatic GFLV-free vines, GFLV-infected vines severely diseased and GFLV-infected vines displaying mild symptoms. The complete coding genomic sequences of GFLV isolates in infected vines was determined by high-throughput sequencing. Most grapevines were infected with multiple genetically divergent variants. While no specific molecular features were apparent for GFLV isolates from vines displaying mild symptoms, a genetic differentiation of GFLV populations depending on the vineyard parcel was observed. The mild symptomatic grapevines identified during this study were established in a greenhouse to recover GFLV variants of potential interest for cross-protection studies.
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Affiliation(s)
- Julie Kubina
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | - Jean-Michel Hily
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
- IFV, 30240 Le Grau-Du-Roi, France
| | - Pierre Mustin
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | - Véronique Komar
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | - Shahinez Garcia
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | | | - Nils Poulicard
- PHIM, Université Montpellier, IRD, INRAE, Cirad, SupAgro, 34000 Montpellier, France
| | - Amandine Velt
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | - Véronique Bonnet
- Maison Moët & Chandon, 20 Avenue de Champagne, 51200 Épernay, France
| | - Laurence Mercier
- Maison Moët & Chandon, 20 Avenue de Champagne, 51200 Épernay, France
| | - Olivier Lemaire
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
| | - Emmanuelle Vigne
- INRAE, SVQV UMR-A 1131, Université de Strasbourg, 68000 Colmar, France
- Correspondence:
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Koloniuk I, Matyášová A, Brázdová S, Veselá J, Přibylová J, Fránová J, Elena SF. Transmission of Diverse Variants of Strawberry Viruses Is Governed by a Vector Species. Viruses 2022; 14:v14071362. [PMID: 35891344 PMCID: PMC9316375 DOI: 10.3390/v14071362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 11/16/2022] Open
Abstract
Advances in high-throughput sequencing methods have boosted the discovery of multistrain viral infections in diverse plant systems. This phenomenon appears to be pervasive for certain viral species. However, our knowledge of the transmission aspects leading to the establishment of such mixed infections is limited. Recently, we reported a mixed infection of a single strawberry plant with strawberry mottle virus (SMoV), strawberry crinkle virus (SCV) and strawberry virus 1 (StrV-1). While SCV and StrV-1 are represented by two and three molecular variants, respectively, SmoV has three different RNA1 and RNA2 segments. In this study, we focus on virus acquisition by individual adult aphids of the Aphis gossypii, Aphis forbesi and Chaetosiphon fragaefolii species. Single-aphid transmission trials are performed under experimental conditions. Both different viruses and individual virus strains show varying performances in single aphid acquisition. The obtained data suggests that numerous individual transmission events lead to the establishment of multistrain infections. These data will be important for the development of epidemiological models in plant virology.
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Affiliation(s)
- Igor Koloniuk
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
- Correspondence: ; Tel.: +420-38-777-5521
| | - Alena Matyášová
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
| | - Sára Brázdová
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
- Faculty of Agriculture, University of South Bohemia, 370 05 Ceske Budejovice, Czech Republic
| | - Jana Veselá
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
| | - Jaroslava Přibylová
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
| | - Jana Fránová
- Institute of Plant Molecular Biology, Department of Plant Virology, Biology Centre CAS, 370 05 Ceske Budejovice, Czech Republic; (A.M.); (S.B.); (J.V.); (J.P.); (J.F.)
| | - Santiago F. Elena
- Instituto de Biología Integrativa de Sistemas, CSIC-Universitat de València, Paterna, 46980 València, Spain;
- Santa Fe Institute, Santa Fe, NM 87501, USA
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Xu F, Meng Q, Suo X, Xie Y, Cheng Y, Luo M. Transcriptome analysis reveals the molecular mechanisms of response to an emergent yellow-flower disease in green Chinese prickly ash (Zanthoxylum schinifolium). Sci Rep 2021; 11:18886. [PMID: 34556742 PMCID: PMC8460732 DOI: 10.1038/s41598-021-98427-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Chinese prickly ash (Zanthoxylum) is extensively used as spice and traditional medicine in eastern Asian countries. Recently, an emergent yellow-flower disease (YFD) break out in green Chinese prickly ash (Zanthoxylum schinifolium, Qinghuajiao in Chinese) at Chongqing municipality, and then leads to a sharp reduction in the yield of Qinghuajiao, and thus results in great economic losses for farmers. To address the molecular response for the emergent YFD of Qinghuajiao, we analyzed the transcriptome of 12 samples including the leaves and inflorescences of asymptomatic and symptomatic plants from three different towns at Chongqing by high-throughput RNA-Seq technique. A total of 126,550 genes and 229,643 transcripts were obtained, and 21,054 unigenes were expressed in all 12 samples. There were 56 and 164 different expressed genes (DEGs) for the AL_vs_SL (asymptomatic leaf vs symptomatic leaf) and AF_vs_SF (asymptomatic flower vs symptomatic flower) groups, respectively. The results of KEGG analysis showed that the “phenylpropanoid biosynthesis” pathway that related to plant–pathogen interaction were found in AL_vs_SL and AF_vs_SF groups, and the “Plant–pathogen interaction” found in AF_vs_SF group, implying that this Qinghuajiao YFD might cause by plant pathogen. Interestingly, we detected 33 common unigenes for the 2 groups, and almost these unigenes were up-regulated in the symptomatic plants. Moreover, most of which were homologs to virus RNA, the components of viruses, implying that this YFD was related to virus. Our results provided a primary molecular basis for the prevention and treatment of YFD of Qinghuajiao trees.
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Affiliation(s)
- Fan Xu
- Key Laboratory of Biotechnology and Crop Quality Improvement of Ministry of Agriculture, Biotechnology Research Center, Southwest University, Chongqing, China
| | - Qian Meng
- Key Laboratory of Biotechnology and Crop Quality Improvement of Ministry of Agriculture, Biotechnology Research Center, Southwest University, Chongqing, China
| | - Xiaodong Suo
- Key Laboratory of Biotechnology and Crop Quality Improvement of Ministry of Agriculture, Biotechnology Research Center, Southwest University, Chongqing, China
| | - Yonghong Xie
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China
| | - Yueqing Cheng
- Fruit Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing, China.
| | - Ming Luo
- Key Laboratory of Biotechnology and Crop Quality Improvement of Ministry of Agriculture, Biotechnology Research Center, Southwest University, Chongqing, China.
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Hily JM, Poulicard N, Kubina J, Reynard JS, Spilmont AS, Fuchs M, Lemaire O, Vigne E. Metagenomic analysis of nepoviruses: diversity, evolution and identification of a genome region in members of subgroup A that appears to be important for host range. Arch Virol 2021; 166:2789-2801. [PMID: 34370094 PMCID: PMC8421298 DOI: 10.1007/s00705-021-05111-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/01/2021] [Indexed: 11/26/2022]
Abstract
Data mining and metagenomic analysis of 277 open reading frame sequences of bipartite RNA viruses of the genus Nepovirus, family Secoviridae, were performed, documenting how challenging it can be to unequivocally assign a virus to a particular species, especially those in subgroups A and C, based on some of the currently adopted taxonomic demarcation criteria. This work suggests a possible need for their amendment to accommodate pangenome information. In addition, we revealed a host-dependent structure of arabis mosaic virus (ArMV) populations at a cladistic level and confirmed a phylogeographic structure of grapevine fanleaf virus (GFLV) populations. We also identified new putative recombination events in members of subgroups A, B and C. The evolutionary specificity of some capsid regions of ArMV and GFLV that were described previously and biologically validated as determinants of nematode transmission was circumscribed in silico. Furthermore, a C-terminal segment of the RNA-dependent RNA polymerase of members of subgroup A was predicted to be a putative host range determinant based on statistically supported higher π (substitutions per site) values for GFLV and ArMV isolates infecting Vitis spp. compared with non-Vitis-infecting ArMV isolates. This study illustrates how sequence information obtained via high-throughput sequencing can increase our understanding of mechanisms that modulate virus diversity and evolution and create new opportunities for advancing studies on the biology of economically important plant viruses.
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Affiliation(s)
- J M Hily
- IFV, Le Grau-Du-Roi, France.
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France.
| | - N Poulicard
- PHIM, Université Montpellier, IRD, INRAE, Cirad, SupAgro, Montpellier, France
| | - J Kubina
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France
| | - J S Reynard
- Institute for Plant Production Science, Agroscope, 1260, Nyon, Switzerland
| | | | - M Fuchs
- Cornell University, Geneva, NY, USA
| | - O Lemaire
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France
| | - E Vigne
- Université de Strasbourg, INRAE, SVQV, UMR-A 1131, F-68000, Colmar, France.
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