Comparison of transmission efficiency of various isolates of <i>Potato virus Y</i> among three aphid vectors

Mondal, Shaonpius; Wenninger, Erik J.; Hutchinson, Pamela; Whitworth, Jonathan L.; Shrestha, Deepak; Eigenbrode, Sanford D.; Bosque‐Pérez, Nilsa A.

doi:10.1111/eea.12404

Cited by 40 publications

(19 citation statements)

References 62 publications

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“…In some cases, noncolonizing aphids (aphids that do not reproduce on potato, such as the bird cherry‐oat aphid) play a major role in PVY transmission, despite the fact that they are transient in the field (Mondal et al. ). Under these circumstances, the rate of vector departure from infected hosts is likely to be of overriding importance for pathogen spread, supporting the notion that behavior may play a central role in the transmission of nonpersistent viruses.…”

Section: Discussionmentioning

confidence: 99%

Vector population growth and condition‐dependent movement drive the spread of plant pathogens

Shaw

Peace

Power

et al. 2017

Ecology

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Plant viruses, often spread by arthropod vectors, impact natural and agricultural ecosystems worldwide. Intuitively, the movement behavior and life history of vectors influence pathogen spread, but the relative contribution of each factor has not been examined. Recent research has highlighted the influence of host infection status on vector behavior and life history. Here, we developed a model to explore how vector traits influence the spread of vector-borne plant viruses. We allowed vector life history (growth rate, carrying capacity) and movement behavior (departure and settlement rates) parameters to be conditional on whether the plant host is infected or healthy and whether the vector is viruliferous (carrying the virus) or not. We ran simulations under a wide range of parameter combinations and quantified the fraction of hosts infected over time. We also ran case studies of the model for Barley yellow dwarf virus, a persistently transmitted virus, and for Potato virus Y, a non-persistently transmitted virus. We quantified the relative importance of each parameter on pathogen spread using Latin hypercube sampling with the statistical partial rank correlation coefficient technique. We found two general types of mechanisms in our model that increased the rate of pathogen spread. First, increasing factors such as vector intrinsic growth rate, carrying capacity, and departure rate from hosts (independent of whether these factors were condition-dependent) led to more vectors moving between hosts, which increased pathogen spread. Second, changing condition-dependent factors such as a vector's preference for settling on a host with a different infection status than itself, and vector tendency to leave a host of the same infection status, led to increased contact between hosts and vectors with different infection statuses, which also increased pathogen spread. Overall, our findings suggest that vector population growth rates had the greatest influence on rates of virus spread, but rates of vector dispersal from infected hosts and from hosts of the same infection status were also very important. Our model highlights the importance of simultaneously considering vector life history and behavior to better understand pathogen spread. Although developed for plant viruses, our model could readily be utilized with other vector-borne pathogen systems.

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Section: Discussionmentioning

confidence: 99%

Vector population growth and condition‐dependent movement drive the spread of plant pathogens

Shaw

Peace

Power

et al. 2017

Ecology

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“…Co-infection with virus strains differing in virulence (or other characteristic) can lead to the same set of interactions and consequences as found with virus species. A good example of two strains of the same virus species with shared vector species is potato virus Y (PVY) [21][22][23] on potato and other hosts [15]. There are many examples of two co-infecting virus species with a shared vector species [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Modelling Vector Transmission and Epidemiology of Co-Infecting Plant Viruses

Allen

Bokil

Cunniffe

et al. 2019

Viruses

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Co-infection of plant hosts by two or more viruses is common in agricultural crops and natural plant communities. A variety of models have been used to investigate the dynamics of co-infection which track only the disease status of infected and co-infected plants, and which do not explicitly track the density of inoculative vectors. Much less attention has been paid to the role of vector transmission in co-infection, that is, acquisition and inoculation and their synergistic and antagonistic interactions. In this investigation, a general epidemiological model is formulated for one vector species and one plant species with potential co-infection in the host plant by two viruses. The basic reproduction number provides conditions for successful invasion of a single virus. We derive a new invasion threshold which provides conditions for successful invasion of a second virus. These two thresholds highlight some key epidemiological parameters important in vector transmission. To illustrate the flexibility of our model, we examine numerically two special cases of viral invasion. In the first case, one virus species depends on an autonomous virus for its successful transmission and in the second case, both viruses are unable to invade alone but can co-infect the host plant when prevalence is high.

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“…Кроме того, в качестве переносчиков вирусов кар тофеля в литературе приводится обширный список других видов. Так, вследствие довольно слабой способности злаковых тлей отличать кормовое растение от некормо вого, эти вредители могут быть важными переносчиками вирусных заболеваний картофеля (Wiktelius, 1982;Mondal et al, 2016).…”

Section: генофонд и селекцияunclassified

Aphid resistance in potato

Radchenko¹

2017

Vestn. VOGiS

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The problem of aphid resistance of potato genetic resources is discussed. Generally, resistance to the green peach aphid (Myzus persicae Sulzer) and the potato aphid (Macrosiphum euphorbiae Thomas) is analyzed in all available literature sources. The Solanum tubero sum L. gene pool contains very few resistant forms. Accessions highly resistant to M. persicae were revealed among 36 of 86 examined wild potato species. The largest number of resistant forms was found among S. bulbocastanum Dun., S. tarijense Hawkes, S. infundi buliforme Phil., S. canasense Hawkes and S. stolonife rum Schlechtd. et Bché. The forms highly resistant to M. euphorbiae belong to 24 of 85 studied species, namely to 10 of 18 series; the species S. bulbocasta num, S. stoloniferum and S. demissum Lindl. include the maximum number of resistant forms. Wild species accessions with specific and group resistance to aphids were revealed. Glandular pubescence of leaves and stems in such species as S. polyadenium Greenm., S. tarijense and S. berthaultii Hawkes is considered as the main mechanism of resistance. Hybrids between S. tuberosum and S. berthaultii were widely used in breeding programs; however, the presence of glandular trichomes was linked to a number of undesirable characters. It is expected that association between the trichome conditioned insect resistance of S. berthaultii and undesirable agronomic traits could be overcome with the use of molecular genetic methods. Studies of the antifeedant activity of potato glycoalkaloids and their aglucons produced controversial results. In numerous works the aphid resistance of potato is connected with plant physiological state. Differences among wild potato accessions in the localization of resistance factors (leaf surface, epidermis, mesophyll, floema) were found that were indicative of differences of resistance mechanisms in the studied forms. Works on investigating induced aphid resistance in potato have great theoretical and practical significance.Key words: genetic resources of potato; potato aphid; green peach aphid; resistance; glandular pubescence; plant breeding.Обсуждается проблема устойчивости генетических ресурсов картофеля к тлям. Практически во всех литературных источниках анализируется резистентность к персиковой (Myzus persicae Sulzer) и большой картофельной (Macrosiphum euphorbiae Thomas) тлям. Генофонд Solanum tuberosum L. относительно беден устойчивыми формами. Высокоустойчивые к M. persicae образцы выявлены среди 36 из 86 изученных диких видов картофеля. Наибольшее число устойчивых форм найдено в пределах видов S. bulbocasta num Dun., S. tarijense Hawkes, S. infundibuliforme Phil., S. canasense Hawkes и S. stoloniferum Schlechtd. et Bché. Высокоустойчивые к M. euphorbiae формы относятся к 24 из 85 изученных видов, к 10 из 18 серий; наибольшее число устойчивых форм содержат виды S. bulbocastanum, S. stoloniferum и S. demissum Lindl. Выявлены образцы диких видов со специфической и групповой устойчиво-стью к тлям. В качестве основного механизма устойчивости к M. persicae и M. eup...

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Comparison of transmission efficiency of various isolates of Potato virus Y among three aphid vectors

Cited by 40 publications

References 62 publications

Vector population growth and condition‐dependent movement drive the spread of plant pathogens

Vector population growth and condition‐dependent movement drive the spread of plant pathogens

Modelling Vector Transmission and Epidemiology of Co-Infecting Plant Viruses

Aphid resistance in potato

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