Tospovirus transmission depends on thrips ontogeny

Moritz, Gerald; Kumm, Sandra; Mound, Laurence A.

doi:10.1016/j.virusres.2003.12.022

Cited by 131 publications

(91 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The reasons why scarcely 10 thrips species worldwide are vectors of tospoviruses continue to be unclear (Mound 2002c), although collaborative work on Frankliniella occidentalis has indicated that part of the reason involves the proximity of the salivary glands to the foregut during early ontogenetic stages (Moritz et al 2004a). The onion thrips, T. tabaci, continues to be an important vector in Tasmania, on potatoes and lettuce crops, but F. schultzei, the tomato thrips, was the major vector further north in Australia until the introduction of western flower thrips.…”

Section: Immigrant and Pest Thripsmentioning

confidence: 99%

Australian Thysanoptera – biological diversity and a diversity of studies

Mound

2004

Australian Journal of Entomology

View full text Add to dashboard Cite

Studies in Australia on thrips have had extensive impacts worldwide. In behaviour, the latest definition of eusociality is derived from work on the radiation of thrips on Acacia species in central Australia, and these Acacia thrips also having been used to develop the concept of 'model clades' for analysing the evolution of behavioural and ecological diversity. In ecology, the concept of the lack of density dependent factors in population dynamics was elaborated through studies on the plague thrips of southern Australia. In virology, thrips were first shown in Australia to be the vectors of tospoviruses, although these viruses, their vectors and the plants attacked are all non-native to this continent. Work in Australia has included the development of electronic methods of illustration, identification and information transfer about thrips, including the use of molecular methods for pest species recognition, and considerable advances have been made in Australia in our knowledge of the relationships between thrips and plants, from polyphagy to pollination.

show abstract

Section: Immigrant and Pest Thripsmentioning

confidence: 99%

Australian Thysanoptera – biological diversity and a diversity of studies

Mound

2004

Australian Journal of Entomology

View full text Add to dashboard Cite

show abstract

“…In the second, the virus is transported via cellular structures (tubular salivary glands and ligaments) connecting the midgut with the salivary glands (Ullman et al, 1993;. In the third, the virus is transferred to the glands during the early development of the thrips, when the salivary glands are in contact for a short period with the midgut (Moritz et al 2004). Immuno-labelling of viral proteins has revealed that replication of the virus occurs in the midgut and salivary glands (Ullman et al, 1993;.…”

Section: Introductionmentioning

confidence: 99%

“…The gut bacteria have to be acquired via food contaminated by the bacteria in frass, saliva, and faeces of other thrips (De Vries et al, 2008 Variation in the capacity of the various stages to ingest or transmit viruses has been previously recorded (Ammar, 1994;. Several reasons have been suggested to account for this variation, such as, the mid-gut barriers to infection differ between larval stages (Ullman et al, 1992), the barriers between the midgut and salivary glands may differ (Moritz et al, 2004), and/or there is variation in efficiency with which the salivary glands are infected . The omnipresence of gut bacteria in old first and second instar larvae, and their absence in young first instar larvae, led us to formulate the hypothesis that the increase in the number of gut bacteria is negatively associated with the ability to transmit tospovirus, because the bacteria adversely affect the ability of the virus to infect mid-gut epithelial cells and its subsequent transmission.…”

Section: Introductionmentioning

confidence: 99%

Symbiotic bacteria (Erwinia sp.) in the gut of Frankliniella occidentalis (Thysanoptera: Thripidae) do not affect its ability to transmit tospovirus

Vries¹,

Wetering²,

Hoek³

et al. 2012

Eur. J. Entomol.

View full text Add to dashboard Cite

Abstract. Tomato spotted wilt virus (TSWV) is one of the most harmful plant viruses and one of its most important vectors is the western flower thrips [Frankliniella occidentalis Pergande (Thysanoptera: Thripidae)]. Recently, we reported the close association of Erwinia sp. gut bacteria with this species of thrips. The first instar larvae acquire these bacteria from their food source. A high proportion of adult western flower thrips transmit TSWV after acquiring the virus during the first larval stage when there are no bacteria in their gut. A considerably lower proportion of adults that acquire the virus early in the second instar transmit virus and none of those exposed to virus late on in the second instar do so. The highest prevalence and total number of symbiotic bacteria are recorded in the guts of second instar thrips. This leads to the hypothesis that the build up of bacteria in the gut reduces the acquisition of TSWV, resulting in a lower capacity to transmit the virus. To test this hypothesis, the transmission of this virus by symbiotic and aposymbiotic adult thrips of the NL3 population was studied. Comparison of virus transmission by adult thrips, the larvae of which either had or lacked gut bacteria and were exposed to virus in either the first or second instar, revealed no difference in the ability of symbiotic and aposymbiotic adults to transmit this virus. We conclude that virus transmission is not affected by the number of the symbiotic bacteria Erwinia sp. present in the gut of thrips larvae.

show abstract

“…Frankliniella occidentalis é altamente polífaga e vetora do vírus do vira-cabeça do tomateiro (TSWV) (Moritz et al 2004). Em morangueiro, os danos associados à espécie são descritos como decorrentes da alimentação, que podem causar, nas flores e frutos, bronzeamentos seguidos de murchamento (Gonzales-Zamora & Garcia-Mari 2003).…”

unclassified