Whitefly transmission of sweet potato viruses

Valverde, R. A.; Sim, Janet; Lotrakul, Pongtharin

doi:10.1016/j.virusres.2003.12.020

Cited by 67 publications

(30 citation statements)

References 35 publications

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“…It has been suggested that low transmission rates may be due to the low amino acid sequence identity between the CP of these viruses and that of other begomoviruses that are transmitted at high rates (Valverde et al, 2004b). In this study, we were able to transmit IYVV and SPLCLaV from field isolates using the Q biotype of B. tabaci.…”

Section: G Lozano and Others 2558mentioning

confidence: 62%

Novel begomovirus species of recombinant nature in sweet potato (Ipomoea batatas) and Ipomoea indica: taxonomic and phylogenetic implications

Lozano

Trenado

Valverde

et al. 2009

Journal of General Virology

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Viral diseases occur wherever sweet potato (Ipomoea batatas) is cultivated and because this crop is vegetatively propagated, accumulation and perpetuation of viruses can become a major constraint for production. Up to 90 % reductions in yield have been reported in association with viral infections. About 20 officially accepted or tentative virus species have been found in sweet potato and other Ipomoea species. They include three species of begomoviruses (genus Begomovirus, family Geminiviridae) whose genomes have been fully sequenced. In this investigation, we conducted a search for begomoviruses infecting sweet potato and Ipomoea indica in Spain and characterized the complete genome of 15 isolates. In addition to sweet potato leaf curl virus (SPLCV) and Ipomoea yellowing vein virus, we identified three new begomovirus species and a novel strain of SPLCV. Our analysis also demonstrated that extensive recombination events have shaped the populations of Ipomoea-infecting begomoviruses in Spain. The increased complexity of the unique Ipomoea-infecting begomovirus group, highlighted by our results, open new horizons to understand the phylogeny and evolution of the family Geminiviridae. INTRODUCTIONSweet potato (Ipomoea batatas, family Convolvulaceae) is ranked as the seventh most important food crop in global production. This crop originated in South America (O'Brien, 1972) but today it is grown in most tropical, subtropical and temperate regions of the world. Numerous ornamental Ipomoea species are grown worldwide. Ipomoea indica is widely grown ornamentally in the Mediterranean basin, where it is frequently naturalized. The putative role of I. indica and other species in the genus as a reservoir for sweet potato pathogens has not been explored.Because sweet potato is vegetatively propagated, accumulation of viruses can become a major constraint for production. About 20 accepted or tentative virus species have been described in sweet potato . Three begomovirus species have been described as infecting Ipomoea species and their genomes have been fully sequenced. These are: sweet potato leaf curl virus (SPLCV) (Lotrakul et al., 1998;Lotrakul & Valverde., 1999), Ipomoea yellow vein virus (IYVV) (Banks et al., 1999) and sweet potato leaf curl Georgia virus (SPLCGV) (Lotrakul et al., 2003). SPLCV or related begomoviruses have been isolated from sweet potato in the Americas (Lotrakul et al., 2003;Fuentes & Salazar, 2003), Asia (Onuki & Hanada, 1998;Luan et al., 2006) and Africa (Miano et al., 2006) and from I. indica in Europe . Begomoviruses are likely to be present in many regions where sweet potato is grown but their prevalence and distribution is still unknown. Difficulties in detecting and isolating begomoviruses directly from sweet potato plants could have impeded additional reports (Kokkinos & Clark., 2006b).Information about the variability among isolates of the described sweet potato begomoviruses is limited. Comparisons and phylogenetic analyses of partial sequences of the AC1 gene of several isolates collect...

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Section: G Lozano and Others 2558mentioning

confidence: 62%

Novel begomovirus species of recombinant nature in sweet potato (Ipomoea batatas) and Ipomoea indica: taxonomic and phylogenetic implications

Lozano

Trenado

Valverde

et al. 2009

Journal of General Virology

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“…B. tabaci has spread broadly throughout Korea since its initial detection in 1998 (Lee and De Barro, 2000;Lee, 2005), with a concomitant increase in the spread of other begomoviruses, including TYLCV and TbLCV (Lee et al, 2010). The asexually reproductive propagation method for sweet potato may facilitate the spread of SPLCV without the need for whiteflies as an insect vector (Valverde et al, 2004;Clark and Hoy, 2006).…”

Section: Phylogenetic Relationship Analysismentioning

confidence: 99%

“…Despite their importance, viral diseases have been the least studied and least well-understood of all diseases affecting these crops (Clark et al, 1988), although several sweet potato viruses have recently been characterized. Today, more than 15 viruses have been shown to infect the crop, and most of them are transmitted by aphids or whiteflies (Fuentes et al, 1996;Banks et al, 1999;Valverde et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization of sweet potato leaf curl virus (SPLCV) isolates from Korea: phylogenetic relationship and recombination analysis

J¹,

S²,

Choi³

et al. 2012

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Summary. -The complete DNA genome of sweet potato leaf curl virus (SPLCV) from samples obtained from eight regions was amplified by PCR and characterized in this study. The DNA genome of one group (SPLCV Korea group 1) consisted of 2828 nucleotides and that of the second group (SPLCV Korea group 2) consisted of 2829 nucleotides. Sequence comparisons showed that the genome sequences of SPLCV Korea isolates were closely related to those of SPLCV Brazil isolates (FJ969834, FJ969835, and FJ969836), SPLCV Japan isolate (AB433788), and SPLCV USA isolate (AF104036) with nucleotide sequence identity values ranging from 96-98%. Analysis of the phylogenetic relationship of SPLCV Korea isolates with other begomoviruses revealed that the majority of SPLCV Korea isolates were clustered with SPLCV Brazil isolates (FJ969834, FJ969835, and FJ969836). Recombination analysis results revealed three recombinations among SPLCV Korea isolates, SPLCV isolates from Brazil and Japan, and ipomoea yellow vein virus (IYVV) Italy isolate.Keywords: begomovirus; Korea; molecular phylogeny; recombination; sweet potato leaf curl virus (SPLCV) * Corresponding authors. E-mail: cell4u@skku.edu, hschoi@korea. kr; fax: +82-31-290-7870, +82-31-290-0438. Abbreviations: IYVV = ipomoea yellow vein virus; REn = replication enhancer protein; Rep = replication-associated protein; SPLCV = sweet potato leaf curl virus; SPLCGV = sweet potato leaf curl Georgia virus; SPLCCaV = sweet potato leaf curl Canary virus; SPLCLaV = sweet potato leaf curl Lanzarote virus; SPLCESV = sweet potato leaf curl Spain virus; SPGVaV = sweet potato golden veinassociated virus; SPMaV = sweet potato mosaic-associated virus; TbLCV = tobacco leaf curl virus; TrAP = transcriptional activator protein; TYLCV = tomato yellow leaf curl virus

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“…De acordo com Valverde et al (2007) vinte vírus já foram isolados, descritos e/ou caracterizados. Os vírus que afetam a cultura são transmitidos principalmente por moscas brancas e pulgões (Gibson et al, 2004;Valverde et al, 2004;Mcgregor et al, 2009).…”

Section: Introductionunclassified

Avaliação da produtividade de plantas de batata-doce oriundas de matrizes livres de vírus

Rós

Hirata

Santos³

2012

Agraria

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RESUMOA cultura da batata-doce apresenta uma série de problemas fitossanitários, destacando-se os de etiologia viral, que causam redução de produtividade e de qualidade de raízes tuberosas. Objetivou-se, com este trabalho, comparar a produtividade de raízes tuberosas e seu formato a partir de plantas de batata-doce oriundas de matrizes isentas de vírus e de matrizes originadas de cultivo comercial, em função do tempo de exposição do material de propagação a possível infecção por vírus. O experimento foi instalado com ramas oriundas de plantas com 3, 6, 9 e 12 meses de permanência no campo de multiplicação. O delineamento experimental foi inteiramente casualizado, em esquema fatorial de 4 x 2 (tempo de exposição das plantas matrizes a condições de campo x materiais de origem). Os resultados evidenciam que a utilização de ramas de plantas provenientes de matrizes livres de vírus proporciona maiores produtividades total e comercial de raízes tuberosas, em relação às ramas oriundas de plantas provenientes de matrizes oriundas de plantio comercial. Observa-se também que as raízes tuberosas produzidas pelas plantas provenientes de matrizes livres de vírus apresentam maior diâmetro transversal por unidade de comprimento. Palavras-chave: Ipomoea batatas, doença, morfologia, raiz tuberosa, virose Maintenance of the yield of sweet potato from virus-free stock plants ABSTRACTThe sweet potato crop suffers from some phytosanitary problems, among them are those of viral etiology that cause decrease of productivity and quality of tuberous roots. This study aimed to compare the productivity of tuberous roots and their format from sweet potato plants originating from virus-free materials and from materials of commercial planting, on function of the exposure time of propagating material to possible infection for virus. The experiment was set up with branches from plants with 3, 6, 9 and 12 months of permanence in the multiplication field. The experimental design was completely randomized in a 4 x 2 factorial scheme (exposure time of stock plants to field conditions x source material). The results show that the use of branches of plants from virus-free stock plants provides higher total and commercial yields of tuberous roots than the use of branches from plants from stock plants from commercial plantations. It is also observed that the roots from plants originating from virus-free stock plants have greater diameter per unit length.

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Whitefly transmission of sweet potato viruses

Cited by 67 publications

References 35 publications

Novel begomovirus species of recombinant nature in sweet potato (Ipomoea batatas) and Ipomoea indica: taxonomic and phylogenetic implications

Novel begomovirus species of recombinant nature in sweet potato (Ipomoea batatas) and Ipomoea indica: taxonomic and phylogenetic implications

Molecular characterization of sweet potato leaf curl virus (SPLCV) isolates from Korea: phylogenetic relationship and recombination analysis

Avaliação da produtividade de plantas de batata-doce oriundas de matrizes livres de vírus

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