First report of <i>Tomato leaf curl New Delhi virus</i> infecting tomato and cucumber in Estonia

Just, K.; Allika, R.; Sman, P.; Arif, Usman; Ilau, B.; Koidumaa, R.; Lasner, H.; Ermakovich, V.; Bukštunovitš, J.; Kvarnheden, Anders

doi:10.1002/ndr2.12083

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“…Watermelon has been described as a natural host of ToLCNDV in Spain; however, severe infections have not occurred in this crop, even in regions where inoculum pressure was high and other cucurbits did become infected . In 2015, the Spanish isolate of ToLCNDV was detected also in Tunisia infecting melon, cucumber, zucchini, tomato and pepper (Capsicum annuum L.) Mnari-Hattab et al, 2022;Zammouri et al, 2017), in Italy infecting melon, squash and zucchini Parrella et al, 2017), in Morocco in zucchini, melon, and tomato (Radouane et al, 2018;Radouane et al, 2022;, in Greece in zucchini , in Algeria in melon, cucumber, and zucchini , in Portugal in zucchini (EPPO, 2019), in France also infecting zucchini (Desbiez et al, 2021) and in Estonia in cucumber and tomato plants(Figure 6) (Just et al, 2022). ToLCNDV has also been identified in Ecballium elaterium (L.) A.…”

Section: Origin and Geographical Distributionmentioning

confidence: 99%

“…In addition, numerous weed species have been found to be hosts of the virus , being able to act as reservoirs during the whole year. ToLCNDV was confined to the Asian continent until 2012, when a new strain of the virus, named ToLCNDV-ES, was detected in different Mediterranean and European countries, first in Spain , and later in Tunisia , Italy , Morocco , Greece , Algeria and more recently in Portugal, Estonia (Just et al, 2022). The ToLCNDV-ES strain evolved from ToLCNDV isolates of Asian origin and adapted to infect cucurbit crops, causing important economic damage .…”

Section: Introductionmentioning

confidence: 99%

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First report of Cucurbit Chlorotic Yellows Virus (CCYV) and Tomato Leaf Curl New Delhi Virus (ToLCNDV) in Algeria and lack of evidence for seed transmission of ToLCNDV in melon and pumpkin.

Kheireddine

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Emerging plant viruses in the Mediterranean Basin have arisen in the last decades becoming an important threat to crop production in this region. The spread of new viral diseases has become one of the main factors limiting agronomic and economic yields of cultivated species of Cucurbitaceae family, the second in importance after Solanaceae. A wide cluster of elements modulates and favors the emergence of these pathogens, including biological, ecological, social, and cultural factors. Global warming favors vector movement to new geographies, while global commercial networks lead to germplasm trade among countries, allowing the long-distance dissemination of viruses. Moreover, the intensive agricultural model, in which prevail genetically homogeneous cultivars, prompts pathogens outbreaks within new geographic areas at a fast rate.One of the key components to develop control strategies, and secure horticultural production, is to identify the type and distribution of viruses present in crops. However, such information in Algeria is scarce and very limited. The objective of this Doctoral Thesis was to identify and determine the prevalence and distribution of the most common viruses on cultivated cucurbit plants (zucchini, cucumber, and melon), and get information about their genetic variability and mode of dispersion.In this work, cucurbit chlorotic yellows virus (CCYV) was first detected infecting cucumber and zucchini in Algeria. CCYV (genus Crinivirus, family Closteroviridae) is part of a complex of whitefly-transmitted viruses that cause yellowing disease in cucurbits. Determination of the complete CP, and partial RdRp and Hsp70 sequences of an Algerian CCYV isolate was conducted to unveil the evolutionary relationships with the published isolates in databases. The phylogenetic analysis showed that the Algerian isolate clustered into group I together with the majority of the reported CCYV isolates. The genetic variation within this group was very low (nucleotide identity higher than 99.5%) despite their extensive and discontinuous geographical distribution, plant species (cultivated or weeds) and year of collection. This low genetic divergence could be due to the recentness of this virus that did not face major changes for the present time. In our case, the presence of CCYV was only detected in mixed infection with tomato leaf curl New Delhi virus (ToLCNDV). In future works, it will be interesting to check the likely synergistic or antagonistic interaction between these two viruses that may affect the symptoms development and spread between crops. SUMMARY viiiToLCNDV (genus Begomovirus, family Geminiviridae) was also first detected infecting cucurbit plants in Algeria. ToLCNDV is a bipartite begomovirus that causes destructive epidemics on economically valuable cucurbit and solanaceous crops. The complete DNA-A and DNA-B genomic sequences of a ToLCNDV isolate from cucumber (ToLCNDV-Biskra) were obtained.Alignments of the nucleotide sequences of DNA-A and DNA-B revealed identities of 98.7 and 97.6%, respectively, ...

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Section: Origin and Geographical Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First report of Cucurbit Chlorotic Yellows Virus (CCYV) and Tomato Leaf Curl New Delhi Virus (ToLCNDV) in Algeria and lack of evidence for seed transmission of ToLCNDV in melon and pumpkin.

Kheireddine

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First report of Tomato leaf curl New Delhi virus infecting tomato and cucumber in Estonia

Cited by 1 publication

References 3 publications

First report of Cucurbit Chlorotic Yellows Virus (CCYV) and Tomato Leaf Curl New Delhi Virus (ToLCNDV) in Algeria and lack of evidence for seed transmission of ToLCNDV in melon and pumpkin.

First report of Cucurbit Chlorotic Yellows Virus (CCYV) and Tomato Leaf Curl New Delhi Virus (ToLCNDV) in Algeria and lack of evidence for seed transmission of ToLCNDV in melon and pumpkin.

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