Genetic Variation and Evolutionary Analysis of Eggplant Mottled Dwarf Virus Isolates from Spain.

The genetic variation and population structure of gene N (nucleocapsid) and part of gene L (replicase) from 13 eggplant mottle dwarf virus (EMDV) isolates from Spain were evaluated and compared with sequences of EMDV isolates from other countries retrieved from GenBank. Phylogenetic inference of part of gene L showed three main clades, one containing an EMDV isolate from Australia and the other two containing isolates from Iran and Europe, as well as four subclades. EMDV isolates from Spain were genetically very similar and grouped in a subclade together with one isolate from Germany and one from the UK.

Detection and absolute quantitation of watermelon mosaic virus by real-time RT-PCR with a TaqMan probe.

Watermelon mosaic virus (WMV) causes serious damage to several crops worldwide, mainly cucurbits. Disease control is based on preventing spread and search for natural resistances for plant breeding, which requires tools for sensitive detection and precise quantitation. We developed a procedure based on reverse transcription followed by real-time quantitative polymerase chain reaction (RT-qPCR) with a primer pair and a TaqMan® probe specific for WMV.

First report of in tomato in Spain.

In October 2019, tomato (Solanum lycopersicum L.) plants showing chlorosis and brown necrosis in apical leaflets and rugose surface in fruits were observed in a greenhouse in Vicar, Almería, Spain. A total of 0.

Assessment of Multilocus Sequence Analysis (MLSA) for Identification of Liberibacter Solanacearum from Different Host Plants in Spain.

is a bacterial group causing different diseases and disorders in plants. Among liberibacters, Liberibacter solanaceraum (CLso) produces disorders in several species mainly within Apiaceae and Solanaceae families. CLso isolates are usually grouped in defined haplotypes according to single nucleotide polymorphisms in genes associated with ribosomal elements.

Real-time reverse transcription polymerase chain reaction development for rapid detection of and comparison with other techniques.

Background: (ToBRFV) is a highly infectious tobamovirus that causes severe disease in tomato ( L.) crops. In Italy, the first ToBRFV outbreak occurred in 2018 in several provinces of the Sicily region.

Fast detection of Southern tomato virus by one-step transcription loop-mediated isothermal amplification (RT-LAMP).

Southern tomato virus (STV) is a double stranded RNA (dsRNA) virus belonging to genus Amalgavirus (family Amalgamaviridae) which has been detected in tomato plants showing stunting, fruit discoloration and size reduction. A one-step reverse-transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed for the detection of STV in total RNA or sap extracts (obtained just by grinding in buffer) from STV-infected tomato plants by using a set of three primers pairs which were designed to the sequence of the STV putative coat protein. Amplification products were visualized by gel electrophoresis or direct staining of DNA.

Genetic variability and evolutionary analysis of parietaria mottle virus: role of selection and genetic exchange.

The genetic variability and evolution of parietaria mottle virus (PMoV) of the genus Ilarvirus was studied by analyzing nucleotide sequences of 2b and CP genes from isolates collected in different countries. Phylogenetic analysis showed that PMoV isolates clustered in different clades: one (clade I) composed of only Italian isolates and three clades (clades II-IV) including the Spanish isolates. The Greek isolate GrT-1 used in this study was in clade IV for the CP phylogenetic tree whereas it formed a separate branch in the 2b phylogenetic tree.

Detection and absolute quantitation of Tomato torrado virus (ToTV) by real time RT-PCR.

Tomato torrado virus (ToTV) causes serious damage to the tomato industry and significant economic losses. A quantitative real-time reverse-transcription polymerase chain reaction (RT-qPCR) method using primers and a specific TaqMan(®) MGB probe for ToTV was developed for sensitive detection and quantitation of different ToTV isolates. A standard curve using RNA transcripts enabled absolute quantitation, with a dynamic range from 10(4) to 10(10) ToTV RNA copies/ng of total RNA.

First Report of Pepper vein yellows virus Infecting Hot Pepper in Sudan.

In two successive winters (2009 and 2010), 14 hot pepper (Capsicum annuum) samples showing unusual symptoms were surveyed in permanently irrigated seasonal vegetable gardens along the Blue Nile in central Sudan (specifically in Gezira State). Symptoms included leaf curling, leaf deformation, reduced leaf size, leaf puckering, interveinal yellowing, vein clearing, or yellow patches. Total RNA was extracted from symptomatic leaves and analyzed by reverse transcription (RT)-PCR with degenerate primer pairs that amplify different viral species within the family Luteoviridae (1).

First Report of Olpidium bornovanus and O. virulentus on Melon in Italy.

A survey for the presence of Olpidium spp. on melon (Cucumis melo L.) was conducted during the beginning of 2013 in central Italy in an unheated greenhouse, located in the melon-producing coastal area of north Latium (central Italy, Viterbo Province) (42°23'09.

Association of 'Candidatus Liberibacter solanacearum' with a vegetative disorder of celery in Spain and development of a real-time PCR method for its detection.

A new symptomatology was observed in celery (Apium graveolens) in Villena, Spain in 2008. Symptomatology included an abnormal amount of shoots per plant and curled stems. These vegetative disorders were associated with 'Candidatus Liberibacter solanacearum' and not with phytoplasmas.

First Report of Pepper vein yellows virus Infecting Sweet Pepper in Spain.

In November 2012, unusual symptoms were observed in plants of sweet pepper (Capsicum annuum L.) grown in commercial greenhouses of Almería Province, southeastern Spain. Symptoms included interveinal yellowing, upward leaf curling, and internode shortening, and were more evident in the upper part of the plant.

First Report of 'Candidatus Liberibacter solanacearum' in Carrot in Mainland Spain.

In the summer of 2008, symptoms of leaf curling with yellow, bronze, and purple discoloration, twisting of petioles, stunting of shoots and tap roots, and proliferation of secondary roots were observed in 18 commercial carrot (Daucus carota L.) fields (~62 ha) severely infested with psyllids (mainly Bactericera sp.) from 52 fields (297 ha) located in Alicante and Albacete provinces of Spain.

'Candidatus Liberibacter solanacearum' Associated with Bactericera trigonica-Affected Carrots in the Canary Islands.

In 2009 and 2010, commercial carrot (Daucus carota L.) fields located in Tenerife (Canary Islands, Spain) showed symptoms of curling, yellow, bronze, and purple discoloration of leaves, stunting of shoots and tap roots, and proliferation of secondary roots. A large population of the psyllid Bactericera trigonica was noted in those fields.

Genetic variability and evolutionary analyses of the coat protein gene of Tomato mosaic virus.

Tomato mosaic virus (ToMV), a member of the genus Tobamovirus, infects several ornamental and horticultural crops worldwide. In this study, the nucleotide sequences of the coat protein gene of worldwide ToMV isolates were analyzed to estimate the genetic structure and diversity of this virus and the involved evolutionary forces. The phylogenetic analysis showed three clades with high bootstrap support: Clade I contained three ToMV isolates from Brazil collected from pepper, Clade II comprised one Brazilian ToMV isolate from pepper, and Clade III was composed of ToMV isolates collected from different plant hosts (pepper, tomato, eggplant, lilac, camellia, dogwood, red spruce, etc.

First Report of Eggplant mottled dwarf virus in Pittosporum tobira in Spain.

In 2009, Pittosporum tobira (Thunb.) Ait. plants showing virus-like symptoms were observed in two ornamental greenhouses in two regions of the eastern coast of Spain (Tarragona and Valencia).

First Report of Spiroplasma citri in Carrot in Europe.

In 2008 and 2009, symptoms of curling, yellow and purple discoloration of leaves, stunting of shoots and tap roots, and formation of bunchy, fibrous secondary roots were observed in commercial carrot (Daucus carota L.) fields located in several production areas of Spain (Alicante, Albacete, Segovia, and Valladolid). Incidence of this disease was almost 100% in individual affected fields.

Multiplex PCR assay for the simultaneous detection and differentiation of Olpidium bornovanus, O. brassicae, and O. virulentus.

A multiplex PCR method has been developed to detect, differentiate, and confirm the morphological identification of three root infecting Olpidium spp.: O. bornovanus, O.

First Report of Tobacco mild green mosaic virus Infecting Capsicum annuum in Tunisia.

During the springs of 2007 and 2008, leaf deformations as well as symptoms of mild green and chlorotic mosaic were observed on pepper (Capsicum annuum) plants grown in Monastir (northwest Tunisia) and Kebili (southeast Tunisia). With the support of projects A/5269/06 and A/8584/07 from the Spanish Agency for International Cooperation (AECI), symptomatic leaf samples were analyzed by transmission electron microscopy (TEM) of leaf-dip preparations. Typical tobamovirus-like particles (rigid rods ≈300 nm long) were observed in crude plant extracts.

First Report of Tomato torrado virus Infecting Tomato in Hungary.

During the growing seasons of 2007 and 2008, in commercial greenhouses of tomato crops (Solanum lycopersicum L.) located in Szeged, Öcsöd, and Csongrád (southeastern regions of Hungary), unusual disease symptoms were observed, including necrotic spots in defined areas at the base of the leaflet, necrosis in the stems, and necrotic lines on the fruits surface. Affected plants appeared inside the greenhouses with a random distribution and the incidence recorded was at least 40%.

First Report of Tomato torrado virus Infecting Tomato in Single and Mixed Infections with Cucumber mosaic virus in Panama.

In February of 2008, in open-field-grown tomato crops (Solanum lycopersicum L.) from the central regions of Coclé, Herrera, Los Santos, and Veraguas of Panama, unusual disease symptoms, including deformation, necrosis, purple margins, interveinal yellowing, downward and upward curling of the leaflets alternately, necrotic lines in sepals and branches, fruits distorted with necrotic lines on the surface, and severe stunting, were observed. Tomato production was seriously damaged.

First Report of the US1 Strain of Pepino mosaic virus in Tomato in the Canary Islands, Spain.

Pepino mosaic virus (PepMV), a member of the genus Potexvirus, was first described in 1974 on pepino (Solanum muricatum Ait.) in Peru. In 1999, PepMV was reported to be affecting tomato (Solanum lycopersicum L.

First Report of Pea enation mosaic virus Infecting Pea and Broad Bean in Spain.

During the spring of 2007, pea plants (Pisum sativum L.) (cvs. Utrillo and Floreta) showing virus-like symptoms were observed in several commercial fields in the southern and eastern regions of Catalonia, Spain.

First Report of Alfalfa mosaic virus in Viburnum lucidum in Spain.

Viburnum sp. is an ornamental shrub widely used in private and public gardens. It is common in natural wooded areas in the Mediterranean Region.