<i>Tomato leaf curl New Delhi virus</i>: a widespread bipartite begomovirus in the territory of monopartite begomoviruses

Zaidi, Syed Shan-e-Ali; Martin, Darren P.; Amin, Imran; Farooq, Muhammad; Mansoor, Shahid

doi:10.1111/mpp.12481

Cited by 114 publications

(95 citation statements)

References 85 publications

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“…This might be the case of ToLCNDV isolates detected in Spain, which are closely related genetically and exhibit a recombinant origin of their DNA-A. This group of isolates differed at the strain level, and the name “Spain (ES)” was proposed for the strain [16,43]. Isolates closely associated with this strain also have been reported to cause severe epidemics in cucurbits in Tunisia and Italy [17,19,20,21], suggesting the emergence of the ES strain in the western Mediterranean Basin.…”

Section: Discussionmentioning

confidence: 99%

“…In tomato, the virus causes severe stunting of plants, which exhibit upward and downward rolling and crinkling of the leaves, interveinal yellowing and vein clearing, with infected plants presenting partial or complete yield loss depending on the growth stage at which infection occurs [15]. ToLCNDV is widespread and more prevalent in northern India, where it is an important constraint to tomato production [15,16]. Reports of ToLCNDV presence were limited to the Indian subcontinent and other countries in Asia until 2012, when it was first detected in the western Mediterranean Basin infecting zucchini squash ( Cucurbita pepo L.), melon and cucumber crops in southern Spain [17].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Strain of Tomato Leaf Curl New Delhi Virus Has Spread to the Mediterranean Basin

Fortes

Sánchez-Campos

Fiallo‐Olivé

et al. 2016

Viruses

112

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Tomato leaf curl New Delhi virus (ToLCNDV) is a whitefly-transmitted bipartite begomovirus (genus Begomovirus, family Geminiviridae) that causes damage to multiple cultivated plant species mainly belonging to the Solanaceae and Cucurbitaceae families. ToLCNDV was limited to Asian countries until 2012, when it was first reported in Spain, causing severe epidemics in cucurbit crops. Here, we show that a genetically-uniform ToLCNDV population is present in Spain, compatible with a recent introduction. Analyses of ToLCNDV isolates reported from other parts of the world indicated that this virus has a highly heterogeneous population genetically with no evident geographical, plant host or year-based phylogenetic groups observed. Isolates emerging in Spain belong to a strain that seems to have evolved by recombination. Isolates of this strain seem adapted to infecting cucurbits, but poorly infect tomatoes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel Strain of Tomato Leaf Curl New Delhi Virus Has Spread to the Mediterranean Basin

Fortes

Sánchez-Campos

Fiallo‐Olivé

et al. 2016

Viruses

112

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“…Plant viruses belonging to family Geminiviridae infect important crops of several families including Cucurbitaceae (gourds, squash, watermelon, and melon), Euphorbiaceae (cassava), Solanaceae (tobacco, petunia, pepper, tomato, and potato), Malvaceae (okra, cotton), and Fabaceae (cowpea, mung bean, common bean, lima bean, and soybean) in different regions of the world (Seal et al, 2006; Zaidi et al, 2016a,c). Geminiviruses are characterized by their quasi-icosahedral twinned particles, which are approximately 18 × 30 nm in size and encapsidate circular, ssDNA of ∼2.5–3.1 kb (Stanley, 1985).…”

Section: Introductionmentioning

confidence: 99%

Engineering Plant Immunity: Using CRISPR/Cas9 to Generate Virus Resistance

et al. 2016

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Plant viruses infect many economically important crops, including wheat, cotton, maize, cassava, and other vegetables. These viruses pose a serious threat to agriculture worldwide, as decreases in cropland area per capita may cause production to fall short of that required to feed the increasing world population. Under these circumstances, conventional strategies can fail to control rapidly evolving and emerging plant viruses. Genome-engineering strategies have recently emerged as promising tools to introduce desirable traits in many eukaryotic species, including plants. Among these genome engineering technologies, the CRISPR (clustered regularly interspaced palindromic repeats)/CRISPR-associated 9 (CRISPR/Cas9) system has received special interest because of its simplicity, efficiency, and reproducibility. Recent studies have used CRISPR/Cas9 to engineer virus resistance in plants, either by directly targeting and cleaving the viral genome, or by modifying the host plant genome to introduce viral immunity. Here, we briefly describe the biology of the CRISPR/Cas9 system and plant viruses, and how different genome engineering technologies have been used to target these viruses. We further describe the main findings from recent studies of CRISPR/Cas9-mediated viral interference and discuss how these findings can be applied to improve global agriculture. We conclude by pinpointing the gaps in our knowledge and the outstanding questions regarding CRISPR/Cas9-mediated viral immunity.

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“…There are several begomoviruses reported in cucurbitaceous crops in India, including tomato leaf curl New Delhi virus (ToLCNDV) [4,5], squash leaf curl China virus [6], pepper leaf curl Bangladesh virus [7], Mesta yellow vein mosaic virus [8], Indian cassava mosaic virus [9], tomato leaf curl Palampur virus [10], ageratum enation virus [11] and Coccinia mosaic virus [12]. Among these viruses, ToLCNDV has become a major limiting factor for the production of many crop plants [13]. The emergence of new strains of ToLCNDV resulting from recombination enables this virus to infect new hosts, resulting in huge economic losses.…”

Section: Introductionmentioning

confidence: 99%

“…The emergence of new strains of ToLCNDV resulting from recombination enables this virus to infect new hosts, resulting in huge economic losses. ToLCNDV was first reported from India on solanaceous crops [14], but it was found to be infecting more than forty diverse plant species in Pakistan, India, Bangladesh, Iran, Sri Lanka, Malaysia, Taiwan, Thailand, Indonesia, Tunisia, Spain and Italy [13]. ToLCNDV is a bipartite begomovirus and it consists of two genome components, DNA-A and DNA-B.…”

Section: Introductionmentioning

confidence: 99%

Detection and characterization of tomato leaf curl New Delhi virus association with mosaic disease of ivy gourd (Coccinia grandis (L.) Voigt) in North India

Venkataravanappa

Reddy²,

Saha

et al. 2018

ARCH BIOL SCI BELGRA

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Sixteen ivy gourd (Coccinia grandis (L.) Voigt) plant samples showing severe mosaic symptoms were collected from New Delhi and Varanasi (Uttar Pradesh) in India. Begomovirus infection was confirmed by PCR using begomovirusspecific primers. Amplified PCR products (1.2 kb fragments) were cloned and the sequence was characterized. Based on sequence analysis, begomovirus associated with the majority of ivy gourd samples (16) was found to be a member of a bipartite begomovirus species, which is closely related to tomato leaf curl New Delhi virus (ToLCNDV). Therefore, two samples of ivy gourd, IVG1-ND and IVG2-Var, were selected for full-length genome (DNA-A and DNA-B-like sequence) amplification by the rolling circle DNA amplification (RCA) method. Sequence analysis performed using the Species Demarcation Tool (SDT) program revealed that they share 89.5-91.3% (IVG1-ND) and 93.4-96.8% (IVG2-Var) nucleotide (nt) identity with the DNA-A-like sequence of ToLCNDV isolated from cucurbits and chilli, respectively. The IVG1-ND and IVG2-Var isolates shared 90% nt identity among themselves, indicating that they are two different strains of ToLCNDV. Similarly, SDT analysis of the DNA-B-like sequence of IVG1-ND and IVG2-Var exhibited showed 82.7-93.3% nt identity with the DNA-B-like sequences of ToLCNDV infecting cucurbits. The recombination analysis of DNA-A and DNB-B-like sequences showed that the greater part of their genome most likely originated from previously reported begomoviruses that are known to infect chilli and cucurbits through recombination.

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Tomato leaf curl New Delhi virus: a widespread bipartite begomovirus in the territory of monopartite begomoviruses

Abstract: Typical symptoms of ToLCNDV infection in its various hosts include leaf curling, vein thickening, puckering, purpling/darkening of leaf margins, leaf area reduction, internode shortening and severe stunting.

Cited by 114 publications

References 85 publications

A Novel Strain of Tomato Leaf Curl New Delhi Virus Has Spread to the Mediterranean Basin

A Novel Strain of Tomato Leaf Curl New Delhi Virus Has Spread to the Mediterranean Basin

Engineering Plant Immunity: Using CRISPR/Cas9 to Generate Virus Resistance

Detection and characterization of tomato leaf curl New Delhi virus association with mosaic disease of ivy gourd (Coccinia grandis (L.) Voigt) in North India

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