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Mazzaglia A, Rahi YJ, Taratufolo MC, Tatì M, Turco S, Ciarroni S, Tagliavento V, Valentini F, D'Onghia AM, Balestra GM. A new inclusive MLVA assay to investigate genetic variability of Xylella fastidiosa with a specific focus on the Apulian outbreak in Italy. Sci Rep 2020; 10:10856. [PMID: 32616824 PMCID: PMC7331650 DOI: 10.1038/s41598-020-68072-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 06/16/2020] [Indexed: 12/04/2022] Open
Abstract
The Olive Quick Decline Syndrome by Xylella fastidiosa subspecies pauca is among the most severe phytopathological emergencies nowadays. In few years, the outbreak devastated olive groves in Apulia (Italy), potentially endangering the entire Mediterranean basin. This research aimed to develop a multiple locus VNTR analysis assay, a molecular tool to differentiate between populations of the pathogen. It has already been successfully applied to different X. fastidiosa subspecies from various plant hosts. The previously published TR loci, together with a set of new design, have been tested in silico on the genome of the Apulian De Donno strain. The resulting selection of 37 TR loci was amplified on the genomic DNAs of the Apulian strains AND from representatives of X. fastidiosa subspecies, and directly on DNA extracted from infected plants. The assay clearly discerned among subspecies or even sequence types (ST), but also pointed out variants within the same ST so as to provide more detailed information on the dynamics and pathogen diffusion pathways. Its effective application even on total DNAs extracted from infected tissues of different host plants makes it particularly useful for large-scale screening of infection and for the strengthening of containment measures.
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Affiliation(s)
- Angelo Mazzaglia
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy.
| | - Yaseen Jundi Rahi
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy
- CIHEAM-Mediterranean Agronomic Institute of Bari, 70010, Valenzano, BA, Italy
| | - Maria Claudia Taratufolo
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy
| | - Marta Tatì
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy
| | - Silvia Turco
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy
| | | | | | - Franco Valentini
- CIHEAM-Mediterranean Agronomic Institute of Bari, 70010, Valenzano, BA, Italy
| | - Anna Maria D'Onghia
- CIHEAM-Mediterranean Agronomic Institute of Bari, 70010, Valenzano, BA, Italy
| | - Giorgio Mariano Balestra
- Dipartimento di Scienze Agrarie e Forestali (DAFNE), Università della Tuscia, 01100, Viterbo, Italy
- Phytoparasite Diagnostics s.r.l., 01100, Viterbo, Italy
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Baù A, Delbianco A, Stancanelli G, Tramontini S. Susceptibility of Olea europaea L. varieties to Xylella fastidiosa subsp. pauca ST53: systematic literature search up to 24 March 2017. EFSA J 2017; 15:e04772. [PMID: 32625470 PMCID: PMC7009984 DOI: 10.2903/j.efsa.2017.4772] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
EFSA was requested by the European Commission to produce a report on the susceptibility of olive varieties to the Apulian strain of Xylella fastidiosa (subsp. pauca strain CoDiRO, ST53). A systematic literature search identified 21 references providing results of primary research studies on olive plants infected (naturally or artificially) by ST53. From experimental infectivity studies and from surveys in olive orchards, converging lines of evidence indicate tolerance of the Leccino variety to ST53 infections, although no long-term observations on yield are available yet. While the variety Leccino can become infected with the pathogen, it develops milder symptoms compared to those observed on susceptible varieties (e.g. Cellina di Nardò, Ogliarola salentina). Also, the size of the X. fastidiosa bacterial populations measured in Leccino-infected plants is lower compared to susceptible olive varieties. Preliminary results show that tolerance or resistance traits can also be found in other olive varieties. New research is now in place in the EU to study the level of susceptibility of many olive varieties to ST53 infections, therefore more relevant results will become available in the coming years.
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Jeger M, Bragard C, Caffier D, Chatzivassiliou E, Dehnen-Schmutz K, Gilioli G, Grégoire JC, Jaques Miret JA, MacLeod A, Navajas Navarro M, Niere B, Parnell S, Potting R, Rafoss T, Rossi V, Urek G, Van Bruggen A, Van Der Werf W, West J, Winter S, De La Fuente L, Spotti Lopes JR, Tramontini S, Andueza M, Candresse T. Susceptibility of Citrusspp., Quercus ilexand Vitisspp. to Xylella fastidiosastrain CoDiRO. EFSA J 2016. [DOI: 10.2903/j.efsa.2016.4601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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