Harmful and Beneficial Effects of Plant Viruses in Insects

Maramorosch, Karl; Dd, Jensen

doi:10.1146/annurev.mi.17.100163.002431

Cited by 41 publications

(14 citation statements)

References 22 publications

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“…Our data also support the suggestion of other studies that Tomato yellow leaf curl virus (TYLCV) has several features of an insect pathogen (12,14,60). Besides TYLCCNV and TYLCV, a few other plant viruses have also been shown to exert cytological and metabolic changes in vector insects (42). The pathological effects upon their insect vectors of persistently transmitted plant viruses seem to be a common phenomenon, which probably induces an immune response in the vec- tor insects.…”

Section: Resultssupporting

confidence: 90%

Global Analysis of the Transcriptional Response of Whitefly to Tomato Yellow Leaf Curl China Virus Reveals the Relationship of Coevolved Adaptations

Luan

Varela

et al. 2011

J Virol

161

173

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The begomoviruses are the largest and most economically important group of plant viruses transmitted exclusively by the whitefly Bemisia tabaci in a circulative, persistent manner. The circulation of the viruses within the insect vectors involves complex interactions between virus and vector components; however, the molecular mechanisms of these interactions remain largely unknown. Here we investigated the transcriptional response of the invasive B. tabaci Middle East-Asia Minor 1 species to Tomato yellow leaf curl China virus (TYLCCNV) using Illumina sequencing technology. Results showed that 1,606 genes involved in 157 biochemical pathways were differentially expressed in the viruliferous whiteflies. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated that TYLCCNV can perturb the cell cycle and primary metabolism in the whitefly, which explains the negative effect of this virus on the longevity and fecundity of B. tabaci. Our data also demonstrated that TYLCCNV can activate whitefly immune responses, such as autophagy and antimicrobial peptide production, which might lead to a gradual decrease of viral particles within the body of the viruliferous whitefly. Furthermore, PCR results showed that TYLCCNV can invade the ovary and fat body tissues of the whitefly, and Lysotracker and Western blot analyses revealed that the invasion of TYLCCNV induced autophagy in both the ovary and fat body tissues. Surprisingly, TYLCCNV also suppressed the whitefly immune responses by downregulating the expression of genes involved in Toll-like signaling and mitogenactivated protein kinase (MAPK) pathways. Taken together, these results reveal the relationship of coevolved adaptations between begomoviruses and whiteflies and will provide a road map for future investigations into the complex interactions between plant viruses and their insect vectors.

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Section: Resultssupporting

confidence: 90%

Global Analysis of the Transcriptional Response of Whitefly to Tomato Yellow Leaf Curl China Virus Reveals the Relationship of Coevolved Adaptations

Luan

Varela

et al. 2011

J Virol

161

173

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“…pathogens are required to multiply and circulate through a sequence of tissues and organs within the vector (Purcell 1982). Detection of MLO agents within gut tissues, fat body, mulpighian tubules, salivary glands are evidences for multiplication and circulation of yellowsagents within the vectors (Townsend et a/ 1977).Plant pathogenic wall-less procaryotes are reported to initiate interactions within the vectors, some harmful and some beneficial (Maramorosch and Jensen 1963;Whitcomb and Williamson 1979).…”

Section: Vector-pathogen Interactionsmentioning

confidence: 99%

Mycoplasma and allied diseases of forest trees in India and vector-host-pathogen interactions

Sen-Sarma

1984

Proc Ani Sci

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Mycoplasma and allied diseases of forest trees in India have been described. MLO disease has been intensively studied in 'sandal' iSantalum album L.). Other forest trees showing typical MLO etiology are 'toon' (Toano ciliata), Acacia catechu, A. meamsii, Eucalyptus qrandisand E. tereticomis. Disease symptoms, collateral hosts, transmission tests with possible insect vectors and vector biology have been described for sandal spike disease. Reasons for contradictory results for sandal spike vectors have been discussed and possible lines of vector search for woody plants are described. Vector-host-pathogen interactions have been reviewed. During the feeding process, phloem cellsare punctured, torn and disturbed by vectors. The hypertrophy of the plant cells around the site of puncture is caused by the action of injected salivary secretion. Vector borne procaryotic disease pathogens multiply within the vectors and circulate through a sequence of tissues and organs of vectors when the latent period of pathogen is long. These initiate both harmful and beneficial interactions within the vector. Possible lines of research to fill up the existing lucunae for insect vectors of mycoplasma and allied diseases of forest trees and vector-host-pathogen interactions have been discussed.

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“…Much the same is probably true in the realm of plant-viruses, for the aphid-vectors of plant viruses (if we look at it that way round) are commonly unaffected. The matter is more doubtful in the case of some cicadellid-borne viruses, which may lead to harmful results in both plants and insects (Maramorosch & Jensen, 1963).…”

Section: The Seventh Marjory Stephenson Memorial Lecture 151mentioning

confidence: 99%

“…Now aster yellows virus can be killed by moderate heat and such heat-treatment cures infected hoppers of their infection; but then, behold, their abnormally fine powers of digestion have gone also. Maramorosch & Jensen (1963) have suggested that we may be overlooking something of wide importance. If there were lots of beneficial viruses in the world, should we ever suspect that they existed?…”

Section: The Seventh Marjory Stephenson Memorial Lecture 151mentioning

confidence: 99%

The Troubles of a Virus: The Seventh Marjory Stephenson Memorial Lecture

Andrewes

1965

Journal of General Microbiology

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Harmful and Beneficial Effects of Plant Viruses in Insects

Cited by 41 publications

References 22 publications

Global Analysis of the Transcriptional Response of Whitefly to Tomato Yellow Leaf Curl China Virus Reveals the Relationship of Coevolved Adaptations

Global Analysis of the Transcriptional Response of Whitefly to Tomato Yellow Leaf Curl China Virus Reveals the Relationship of Coevolved Adaptations

Mycoplasma and allied diseases of forest trees in India and vector-host-pathogen interactions

The Troubles of a Virus: The Seventh Marjory Stephenson Memorial Lecture

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