Zucchini yellow mosaic virus

Abstract

Zucchini yellow mosaic potyvirus (ZYMV), first isolated in Italy in 1973, described in 1981, and then identified in all continents within a decade, is one of the most economically important viruses of cucurbit crops. It is efficiently aphid-transmitted in a nonpersistent manner and it is also seed-borne in zucchini squash, which could have contributed to its rapid spread worldwide. Biological variability has been observed among ZYMV isolates, concerning host range, symptomatology and aphid transmissibility. More recent studies also revealed a serological and molecular variability. The survival of ZYMV in areas where cucurbits are not grown throughout the year remains to be elucidated, because very few natural over-wintering hosts have been identified so far. Partial control of ZYMV can be achieved by limiting transmission of the virus to the crops by aphids, using adapted cultural practices. Cross-protection with a mild strain has been shown to be effective against most ZYMV isolates. Resistance genes found in cucurbit germplasms are currently being introduced into cultivars with good agronomical characteristics. Pathogen-derived resistance strategies using the expression of ZYMV genes in transgenic plants have also been developed and appear promising. Nevertheless, the high biological variability of ZYMV justifies a careful evaluation of the deployment of genetic control strategies in order to increase their durability.

Outcomes of co-infection by two potyviruses: implications for the evolution of manipulative strategies

“…WMV and ZYMV have overlapping host ranges ( primarily comprising cucurbits [21,22]), cause similar symptoms [22] and are transmitted (non-persistently) by the same aphid species, although with differing efficiency [23]. Like other potyviruses, WMV and ZYMV have unipartite single-stranded positive sense RNA genomes (similar in size and organization [20,24]) encoding a polyprotein, and both use a helper-component protein for attachment to the aphid stylet [25].…”

Seed transmissibility of viruses in winter squash landraces collected from the Black Sea region of Turkey

“…ZYMV was first detected in summer squash in northern Italy (Lisa et al 1981). Subsequently, the virus spread worldwide, especially infecting squashes and pumpkins and causing significant yield reductions in these crops (Desbiez & Lecoq 1997;Svoboda & Polák 2002). The virus is easily non-persistently transmissible by aphids and at long distances via infected seeds (Fletcher et al 2000).…”

Reação de acessos de Cucurbita sp. ao Zucchini yellow mosaic virus (ZYMV)

“…O Zucchini yelow mosaic virus (ZYMV) é considerado um dos vírus mais importantes no cultivo de cucurbitáceas em diversos países (LISA; LECOQ, 1984;PROVVIDENTI et al, 1984;NAMETH et al, 1985;LECOQ et al, 1991). Desde a sua primeira ocorrência na Itália (1973) e posteriormente na França (1979), o vírus já foi observado em 50 países em plantações de cultivo intensivo de cucurbitáceas (DESBIEZ; LECOQ, 1997). Na California o ZYMV foi responsável por reduções de 40 a 50% na produção de frutos de melão, numa área de 7.500 ha plantada na primavera de 1984de (NAMETH et al, 1985.…”