Article

Top 10 plant viruses in Molecular Plant Pathology. Mol Plant Pathol

Department of Plant Pathology and Microbiology, 2132 TAMU, Texas A&M University, College Station, TX 77843-2132, USA.
Molecular Plant Pathology (Impact Factor: 4.72). 12/2011; 12(9):938-54. DOI: 10.1111/j.1364-3703.2011.00752.x
Source: PubMed

ABSTRACT

Many scientists, if not all, feel that their particular plant virus should appear in any list of the most important plant viruses. However, to our knowledge, no such list exists. The aim of this review was to survey all plant virologists with an association with Molecular Plant Pathology and ask them to nominate which plant viruses they would place in a 'Top 10' based on scientific/economic importance. The survey generated more than 250 votes from the international community, and allowed the generation of a Top 10 plant virus list for Molecular Plant Pathology. The Top 10 list includes, in rank order, (1) Tobacco mosaic virus, (2) Tomato spotted wilt virus, (3) Tomato yellow leaf curl virus, (4) Cucumber mosaic virus, (5) Potato virus Y, (6) Cauliflower mosaic virus, (7) African cassava mosaic virus, (8) Plum pox virus, (9) Brome mosaic virus and (10) Potato virus X, with honourable mentions for viruses just missing out on the Top 10, including Citrus tristeza virus, Barley yellow dwarf virus, Potato leafroll virus and Tomato bushy stunt virus. This review article presents a short review on each virus of the Top 10 list and its importance, with the intent of initiating discussion and debate amongst the plant virology community, as well as laying down a benchmark, as it will be interesting to see in future years how perceptions change and which viruses enter and leave the Top 10.

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Available from: Gary D Foster, Sep 26, 2014
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    • "Frankliniella occidentalis (Western Flower Thrips) is the most economically important insect pest among thysanopterans due to its extremely wide host range, worldwide distribution and competence to transmit 5 of the 14 recognized Tospovirus species (Whitfield et al. 2005). It is reported to be the most efficient vector of Tomato spotted wilt virus (TSWV) (Wijkamp et al. 1995, Whitfield et al. 2005), which currently ranks among the top ten most economically important plant viruses worldwide (Mumford et al. 1996, Sherwood et al. 2000, Parrella et al. 2003, Scholthoff et al. 2011), causing serious losses in a wide range of crops and flowers all over the world (Goldbach & Peters 1994). Out of the 7700 described species of Thysanoptera (http://www.ento.csiro.au/thysanoptera/worldthrips "
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    ABSTRACT: The tospovirus-plant-vector interaction is a specific and complex relationship. It is established that several factors influence this interaction leading to high variability of transmission efficiency of the virus within a vector population. We studied the contribution of vector gender to this interaction using Frankliniella occidentalis (western flower thrips) reared on either Tomato spotted wilt virus (TSWV) infected or uninfected Capsicum annum leaflets throughout their larval stages. Later pupae were individually transferred onto healthy leaf disks to examine the differences in: survival, development rate, transmission efficiency and feeding behavior between males and females in all the treatments. This was based on the hypothesis that sex of the vector influences transmission efficiency within the vector population. Our results showed that males had significantly higher longevity, lower mortality and shorter development time compared to females, while in the comparison of feeding behaviour, females were found to feed more intensively than males, regardless of whether they were exposed or unexposed to TSWV. Conversely, transmission efficiency; which referred to successful inoculation and establishment of the virus in the host plant after a given period of inoculative feeding, was found to be significantly higher in males compared to females, despite females having the highest percentage of transmitting individuals. These findings account in part for the high variability in vector competence of F. occidentalis within a population, which further give insight into the biological factors that may influence the transmission of TSWV by F. occidentalis.
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    • "Together, these studies provide the proof of the feasibility of this emerging technology in engineering antiviral resistance in plants. Tomato spotted wilt virus (TSWV) is one of the most economically important viral pathogen, considered to be one of the top ten economically important viruses in the world (Scholthof et al., 2011). It infects a wide range of crops (more than 1000 plant species) that includes a broad range of staple and horticultural crops, impacting agriculture in tropical and subtropical areas globally. "
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    ABSTRACT: Tomato spotted wilt virus (TSWV) is an economically important viral pathogen of a wide range of field and horticultural crops. We developed an artificial microRNA (amiRNA) strategy against TSWV, targeting the nucleoprotein (N) and silencing suppressor (NSs) genes. The amiRNA constructs replaced the natural miRNA in a shortened Arabidopsis 173-nucleotide (nt) miR159a precursor backbone (athmiR159a) without the stem base extending beyond the miR/miR* duplex. Further, each amiRNA was modified to contain a mismatch (wobble) sequence at nucleotide position 12 and 13 on the complementary strand amiRNA*, mimicking the endogenous miR159a sequence structure. Transient expression in N. benthamiana demonstrated that the introduction of a wobble sequence did not alter amiRNA expression levels. Following challenge inoculation with TSWV, plants expressing N-specific amiRNAs with or without the wobble remained asymptomatic and were negative for TSWV by ELISA. In contrast, plants expressing the NSs-specific amiRNAs were symptomatic and accumulated high levels of TSWV. Similar findings were obtained in stably transformed N. tabacum plants. Our results show that a shortened 173-nt athmiR159a backbone is sufficient to express amiRNAs and that the presence of mismatch at position 12-13 does not influence amiRNA expression or conferring of resistance. We also show that selection of target gene and positional effect are critical in amiRNA-based approach for introducing resistance. These findings open the possibility of employing the amiRNA approach for broad-spectrum resistance to tospoviruses as well as other viruses.
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    • "Bitki virüs hastalıklarından dolayı Dünya'da her yıl yaklaşık 60 milyar dolar ürün kaybı meydana geldiği tahmin edilmektedir (Matthews, 1992). Son yıllarda Dünya'da ve ülkemizde birçok üretim alanında salgın hale gelen Domates lekeli Solgunluk virüsü (TSWV), kültür bitkilerinde en fazla ekonomik öneme sahip ilk 10 virüs arasında 2. sırada yer almaktadır (Scholthof et al., 2011). TSWV'nin Dünya'da tarımsal ürünlerde her yıl 1 milyar dolardan fazla kayba neden olduğu tahmin edilmektedir (Uhrig et al., 1999; Griep et al., 2000). "

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