Two distinct 16SrIII phytoplasma subgroups are associated with shoot proliferation in Vernonia brasiliana, a wild species inhabiting the Brazilian savanna

Fugita, Jaqueline M. S.; Pereira, Thays Benites Camargo; Banzato, Ticyana Carone; Kitajima, Elliot Watanabe; Souto, Eliezer Rodrigues de; Bedendo, Ivan Paulo

doi:10.1007/s40858-017-0135-7

Cited by 7 publications

(7 citation statements)

References 18 publications

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“…Recently, phytoplasmas from subgroup 16SrIII-J have been reported in Chile in association with yellow wilt disease of sugar beet and Swiss chard yellowing (Fiore et al 2015a;Quiroga et al 2017). Phytoplasmas belonging to subgroup 16SrIII-J are widely distributed in South America and have been reported affecting diverse host species in Bolivia, Brazil, Chile and Argentina (Harrison et al 2003;Montano et al 2011;Galdeano et al 2013;Fugita et al 2017;Quiroga et al 2017;Fernández et al 2018).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Phytoplasmas of subgroup 16SrIII-J associated with Beta vulgaris in Argentina

Fernández

Guzmán²,

Baffoni

et al. 2020

Trop. plant pathol.

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Symptoms of general wilting and yellowing were found affecting Beta vulgaris L. (sugar beet, fodder beet and chard) in the Argentinean region of Bahía Blanca (Buenos Aires province), Valle Medio, and Valle Inferior de Rio Negro (Patagonia region). PCR amplification of the 16S rRNA region showed presence of phytoplasma in approximately 80% of the samples from symptomatic plants. Phylogenetic analyses revealed the presence of phytoplasmas of the 16SrIII-J subgroup. This is the first molecular evidence of phytoplasmas associated with yellow wilt disease in B. vulgaris in Argentina.

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Phytoplasmas of subgroup 16SrIII-J associated with Beta vulgaris in Argentina

Fernández

Guzmán²,

Baffoni

et al. 2020

Trop. plant pathol.

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“…For Brazilian agroecosystems, the results of our study are of particular concern because this species is widely distributed and numerous diseases have been described in association with group 16SrIII phytoplasmas, with representatives of the group reported in cassava, cauliflower, chayote, China tree, eggplant, pumpkin, and tomato (Flores et al 2013). Notably, a 16SrIII-J phytoplasma was characterized in Vernonia brasiliana plants, a species commonly found in grazing areas, exhibiting symptoms of shoot proliferation (Fugita et al 2017). The discovery of B. decumbens as one more species harboring a 16SrIII-J phytoplasma is further evidence of the low specificity of this group of phytoplasmas in relation to hosts.…”

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confidence: 71%

Occurrence of a subgroup 16SrIII-J phytoplasma in non-symptomatic Brachiaria decumbens cultivated in a grazing area

Fugita

Pereira

Banzato

et al. 2017

Trop. plant pathol.

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Brachiaria spp. are the most important and widely used warm season grasses for pasture, but are also important weeds for most economic crops in the tropics. During phytoplasma surveys in pasture fields, asymptomatic plants of Brachiaria decumbens were collected for inspection. Nested PCR detected phytoplasmas in more than 90% of sampled plants. Based on computer-simulated RFLP and a similarity coefficient calculation, a subgroup 16SrIII-J phytoplasma was molecularly characterized. Phylogenetic analysis was consistent with virtual RFLP identification. Representatives of this subgroup have been identified in diverse Brazilian regions encompassing various commercial crops. Our study revealed B. decumbens as a new host and reservoir of 16SrIII-J phytoplasma. Keywords Diseases of grasses. Mollicutes. Pasture grasses. Yellows diseases Phytoplasmas are wall-less bacteria inhabiting phloem vessels that are associated with numerous diseases widely distributed globally. These bacteria are disseminated by sap-sucking insect vectors and are currently classified in groups and subgroups based on the genetic variability of the 16S rRNA gene (Lee et al. 2000).

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“…During a disease outbreak on Corylus avellana in Oregon (US), removal of symptomatic and adjacent plants eliminated the disease from the orchard, while failure to remove shrubs adjacent to infected ones resulted in the eventual spread throughout about 4 ha of a 20 ha orchard (Postman et al, 2001). Vernonia brasiliana is reported as a probable reservoir and possible inoculum source of 16SrIII-B phytoplasmas (Fugita et al, 2017). Some infected tubers may show normal sprouting and can be an important spreading factor of phytoplasma diseases in potato growing areas (Santos-Cervantes et al, 2010) (EFSA PLH Panel et al, 2020a).…”

Section: Biology Of the Pestmentioning

confidence: 99%

“…Vernonia brasiliana : intensive shoot proliferation, mild leaf chlorosis and deformed leaves (Fugita et al., 2017)…”

Section: Appendix a – Symptoms On Plants Other Than Solanum Tuberosummentioning

confidence: 99%

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Pest categorisation of the non‐EU phytoplasmas of tuber‐forming Solanum spp.

Bragard¹,

Dehnen‐Schmutz²,

Gonthier³

et al. 2020

EFS2

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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 ( GD 32; St_ JO _10, 14, 17; PPT ‐ SA ; Rus‐343F; PPT ‐ GTO 29, ‐ GTO 30, ‐ 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 AK pot7, MT 117, AK pot6; 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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Two distinct 16SrIII phytoplasma subgroups are associated with shoot proliferation in Vernonia brasiliana, a wild species inhabiting the Brazilian savanna

Cited by 7 publications

References 18 publications

Phytoplasmas of subgroup 16SrIII-J associated with Beta vulgaris in Argentina

Phytoplasmas of subgroup 16SrIII-J associated with Beta vulgaris in Argentina

Occurrence of a subgroup 16SrIII-J phytoplasma in non-symptomatic Brachiaria decumbens cultivated in a grazing area

Pest categorisation of the non‐EU phytoplasmas of tuber‐forming Solanum spp.

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