Dynamics of PVY strains in field grown potato: Impact of strain competition and ability to overcome host resistance mechanisms

Davie, K.; Holmes, R.; Pickup, J.; Lacomme, Christophe

doi:10.1016/j.virusres.2017.06.012

Cited by 36 publications

(31 citation statements)

References 26 publications

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“…Such mosaic genotypes phylogenetically originate from an ancestral genome consisting of fragments exchanged between PVY N (necrotic) and PVY O (ordinary) strain (Lorenzen et al, 2006;Karasev et al, 2011). Monitoring of PVY strain incidence conducted during last decades showed the common shift from PVY O strains towards recombinant ones (Crosslin et al, 2006;Davie et al, 2017). This trend is observed worldwide and according to current estimation recombinant PVY N strains may account for up to 90% of all PVY cases found under field conditions (Davie et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…PVY causes foliar and/or tuber disease with variable symptoms depending on virus strain, host growth stage and susceptibility, and environmental conditions (Fox et al, 2017). Currently, PVY N and recombinant PVY NTN and PVY N-Wi strains largely predominate under field conditions, accounting for > 90% of all PVY cases (Davie et al, 2017). PVY is transmitted non-persistently by aphids (e.g., Myzus persicae) being so far the only identified vectors for this pathogen.…”

Section: Introductionmentioning

confidence: 99%

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Arbuscular Mycorrhiza Changes the Impact of Potato Virus Y on Growth and Stress Tolerance of Solanum tuberosum L. in vitro

et al. 2020

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Under the field conditions crop plants interact with diverse microorganisms. These include beneficial (symbiotic) and phytopathogenic microorganisms, which jointly affect growth and productivity of the plants. In last decades, production of potato (Solanum tuberosum L.) suffers from increased incidence of potato virus Y (PVY), which is one of most important potato pests. Arbuscular mycorrhizal fungi (AMF) are common symbionts of potato, however the impact of mycorrhizal symbiosis on the progression of PVY-induced disease is scarcely known. Therefore, in the present study we investigated the effect of joint PVY infection and mycorrhizal colonization by Rhizophagus irregularis on growth traits of the host potato plant (cv. Pirol). The tested PVY isolate belonged to N-Wilga strain group, which is considered to be predominant in Europe and many other parts of the world. The viral particles were concentrated in the leaves, but decreased the root growth. Furthermore, the infection with PVY evoked prolonged oxidative stress reflected by increased level of endogenous H 2 O 2. AMF alleviated oxidative stress in PVY-infected host plants by a substantial decrease in the level of shoot-and rootderived H 2 O 2 , but still caused asymptomatic growth depression. It was assumed that mycorrhizal symbiosis of potato might mask infection by PVY in field observations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhiza Changes the Impact of Potato Virus Y on Growth and Stress Tolerance of Solanum tuberosum L. in vitro

et al. 2020

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“…While potyviruses are the main cause of virus diseases in Scotland (Fenton et al, 2012;Davie et al, 2017), PYBV was not detected in over 5 years of monitoring commercial cultivated potato crops by inspection of growing crops and post-harvest testing of tubers. The monitoring of commercial cultivated potato crops undertaken in this study by inspection, supported by post-harvest testing of tubers, suggests that PYBV is unlikely to be present in these stocks.…”

Section: Discussionmentioning

confidence: 99%

“…The biological properties of other closely related potyviruses, such as PVA, based on their symptomatology on potato cultivars are not well documented. Field inspection surveys undertaken in the UK indicate that PVY and PVA are the two most prevalent viruses infecting potato, accounting for 50-60% and 10-20% of all viruses identified in virus-infected plants, respectively (Fenton et al, 2012;Davie et al, 2017). PVY infects a large number of commonly grown potato cultivars but only a few cultivars such as Cabaret, D esir ee, Estima and Hermes are found to be naturally infected by PVA.…”

Section: Introductionmentioning

confidence: 99%

Biological and molecular characterization of Potato yellow blotch virus, a new species of the genus Potyvirus

et al. 2018

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A new species of the genus Potyvirus infecting potatoes, with the proposed name Potato yellow blotch virus (PYBV), was discovered in a breeding line 99m‐022‐026 in Scotland. The infected plants show isolated yellow blotches on the leaves. The genome of PYBV contains a large open reading frame encoding a single polyprotein of 3054 amino acids. Sequence analysis shows that PYBV is closely related to Potato virus A (PVA), with an overall 72% identity at the nucleotide level for the whole genome. The least conserved P1 protease gene shares only 50% nucleotide identity with PVA. The host range of PYBV was comparable to PVA on solanaceaous and non‐solanaceous indicator plant species with the exception of Solanum demissum A and Y. Different symptoms were also observed for PYBV and PVA in Nicotiana benthamiana, Nicotiana hesperis and Nicotiana occidentalis P1. The susceptibility of potato (Solanum tuberosum) cultivars to PYBV and PVA was similar. In over 5 years of investigation, PYBV has not been found in commercial seed and ware potato crops in Scotland.

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“…The recombinant PVY variants are found to be prevalent worldwide in potato -growing area and are replacing the non-recombinant strains PVY C , PVY O and PVY N (Funke et al, 2017, Davie et al, 2017. In the UK, a survey of the molecular diversity of PVY indicated that 80-90% belong to the recombinant European PVY NTN group (Davie et al, 2017). In the United States, there is a rise in the recombinant PVY N-Wi strain incidence, from less than 27% in 2011 to 53% in 2015.…”

Section: Introductionmentioning

confidence: 99%

Methods to Study the PVY Population in the Potato

Yin

2017

Plant Breeding and Seed Science

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The PVY population in the potato has been studied continuously using tobacco bait plants in potato fields at Młochów since 1980 at two-year intervals and in potato tuber samples collected from different regions of Poland since 2001 yearly. The paper presents the combined biological, serological and molecular assays for PVY identification and strain classification. Biologically, PVY strains are defined with respect to their ability to elicit hypersensitive resistance (HR) mediated by N genes in differential potato cultivars (King Edward, Desiree and Pentland Ivory) and to symptoms in the tobacco (cultivar Samsun). Serologically, an ELISA assay based on polyclonal or monoclonal cocktail antibodies recognizes all PVY strain types, while the specific monoclonal antibodies help to recognize PVY N or PVY O /PVY C strains. Multiplex RT-PCR, Real-time RT-qPCR and sequencing-based assays are used to define the PVY genome structure. In the Polish population of PVY, the strains PVY O , PVY NTN , PVY N-Wi , PVY Z -NTN and PVY E were identified, while the PVY C strain was not detected.

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Dynamics of PVY strains in field grown potato: Impact of strain competition and ability to overcome host resistance mechanisms

Cited by 36 publications

References 26 publications

Arbuscular Mycorrhiza Changes the Impact of Potato Virus Y on Growth and Stress Tolerance of Solanum tuberosum L. in vitro

Arbuscular Mycorrhiza Changes the Impact of Potato Virus Y on Growth and Stress Tolerance of Solanum tuberosum L. in vitro

Biological and molecular characterization of Potato yellow blotch virus, a new species of the genus Potyvirus

Methods to Study the PVY Population in the Potato

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