<i>Tomato leaf curl virus</i>and Cotton leaf curl Multan betasatellite can cause mild transient symptoms in cotton

Saeed, Muhammad

doi:10.1071/dn10021

Cited by 9 publications

(8 citation statements)

References 10 publications

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“…For TYLCCNV, the betasatellite TYLCCNB extends the host range of the virus to include N. benthamiana and tomato (Cui et al , 2004). The ability of betasatellites to extend the host ranges of monopartite begomoviruses and even to allow the DNA A components of bipartite begomoviruses to infect plant species (in the absence of DNA B) that are not part of their usual host range is well documented and is attributed to the βC1 product of betasatellites (Saunders et al , 2002; Saeed et al , 2007; Saeed, 2010a, b). This indicates that TYLCCNV is lacking some essential function required to infect tomato and N. benthamiana which can be complemented by the βC1 of TYLCCNB.…”

Section: Discussionmentioning

confidence: 99%

A recombinant begomovirus resulting from exchange of the C4 gene

Xie

Zhao

Jiao

et al. 2013

Journal of General Virology

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A begomovirus isolated from Malvastrum coromandelianum and tomato originating from Yunnan province (China) was shown to be representative of a new begomovirus species, for which the name tomato leaf curl Yunnan virus (TLCYnV) is proposed. TLCYnV has high levels of sequence identity to tomato yellow leaf curl China virus (TYLCCNV) across the whole genome, except for sequences encompassing the C4 gene. Agrobacterium-mediated inoculation showed TLCYnV to be highly infectious to a range of plant species but poorly infectious to M. coromandelianum. In contrast to TYLCCNV, TLCYnV was shown to infect tomato in the absence of a betasatellite. In field-collected samples, TLCYnV was identified most frequently in tomato in which it was not associated with a betasatellite. Transgenic expression in Nicotiana benthamiana showed that the C4 protein of TYLCCNV did not induce developmental abnormalities, whereas the C4 of TLCYnV induced severe developmental abnormalities, reminiscent of virus symptoms. The genome of TLCYnV was shown to be significantly less methylated in plants than that of TYLCCNV and the C4 protein of TLCYnV was shown to suppress post-transcriptional gene silencing and transcriptional gene silencing more effectively than the C4 of TYLCCNV. The results indicate that TLCYnV evolved from TYLCCNV by recombination, acquiring a more virulent C4, allowing it to dispense with the requirement for a betasatellite. The implications of these findings in relation to the evolution of monopartite begomoviruses are discussed.

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Section: Discussionmentioning

confidence: 99%

A recombinant begomovirus resulting from exchange of the C4 gene

Xie

Zhao

Jiao

et al. 2013

Journal of General Virology

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“…The betasatellite-encoded βC1 is essential for begomoviruses to symptomatically infect cotton and it is tempting to suggest that it is the suppressor activity of this protein which is the essential function. However, this cannot be the whole story since, even in the presence of CLCuMuB, non-cotton-adapted begomoviruses, such as ToLCNDV and tomato leaf curl virus (neither of which infect cotton naturally or is normally associated with a betasatellite), can transiently infect cotton and induce mild CLCuD symptoms but cannot maintain an infection (Saeed, 2010a, b). Thus not any virus will do and the viruses themselves make a contribution to the infection of cotton (thus are cotton-adapted) even if, for symptoms, the overriding contribution is from the betasatellite (Qazi et al , 2007; Saeed et al , 2008).…”

Section: The Clcud Complex and Rna Silencingmentioning

confidence: 99%

Cotton leaf curl disease – an emerging threat to cotton production worldwide

Sattar

Kvarnheden

Saeed

et al. 2013

Journal of General Virology

203

144

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Cotton leaf curl disease (CLCuD) is a serious disease of cotton which has characteristic symptoms, the most unusual of which is the formation of leaf-like enations on the undersides of leaves. The disease is caused by whitefly-transmitted geminiviruses (family Geminiviridae, genus Begomovirus) in association with specific, symptom-modulating satellites (betasatellites) and an evolutionarily distinct group of satellite-like molecules known as alphasatellites. CLCuD occurs across Africa as well as in Pakistan and north-western India. Over the past 25 years, Pakistan and India have experienced two epidemics of the disease, the most recent of which involved a virus and satellite that are resistance breaking. Loss of this conventional host-plant resistance, which saved the cotton growers from ruin in the late 1990s, leaves farmers with only relatively poor host plant tolerance to counter the extensive losses the disease causes. There has always been the fear that CLCuD could spread from the relatively limited geographical range it encompasses at present to other cotton-growing areas of the world where, although the disease is not present, the environmental conditions are suitable for its establishment and the whitefly vector occurs. Unfortunately recent events have shown this fear to be well founded, with CLCuD making its first appearance in China. Here, we outline recent advances made in understanding the molecular biology of the components of the disease complex, their interactions with host plants, as well as efforts being made to control CLCuD.

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“…with the helper ToLCNDV, in chili ( Capsicum annuum ) with Bhendi yellow vein mosaic virus [ 58 ], in Sonchus arvensis with Alternanthera yellow vein virus [ 59 ], in sunn hemp ( Crotalaria juncea ) with CLCuKoV-Bur [ 60 ], in China rose ( Hibiscus rosa - sinensis ) with CLCuKoV [ 61 ], and in cluster bean ( Cyamopsis tetragonoloba ) with PaLCuV [ 62 ]. Under experimental conditions, CLCuMuB produced mild symptoms in cotton when bombarded with Tomato leaf curl virus (ToLCV) [ 63 ]; and in the presence of CLCuMuB, the symptoms of a NW begomovirus Cabbage leaf curl virus (CbLCuV) were also enhanced in Nicotiana benthamiana [ 10 ].…”

Section: Trans-replication Of Cotton Leaf Curl Multan Betasatellitmentioning

confidence: 99%

An Insight into Cotton Leaf Curl Multan Betasatellite, the Most Important Component of Cotton Leaf Curl Disease Complex

Zubair

Zaidi

Shakir

et al. 2017

Viruses

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Cotton leaf curl disease (CLCuD) is one of the most economically important diseases and is a constraint to cotton production in major producers, Pakistan and India. CLCuD is caused by monopartite plant viruses belonging to the family Geminiviridae (genus Begomovirus), in association with an essential, disease-specific satellite, Cotton leaf curl Multan betasatellite (CLCuMuB) belonging to a newly-established family Tolecusatellitidae (genus Betasatellite). CLCuMuB has a small genome (ca. 1350 nt) with a satellite conserved region, an adenine-rich region and a single gene that encodes for a multifunctional βC1 protein. CLCuMuB βC1 protein has a major role in pathogenicity and symptom determination, and alters several host cellular functions like autophagy, ubiquitination, and suppression of gene silencing, to assist CLCuD infectivity. Efficient trans-replication ability of CLCuMuB with several monopartite and bipartite begomoviruses, is also associated with the rapid evolution and spread of CLCuMuB. In this article we comprehensively reviewed the role of CLCuMuB in CLCuD, focusing on the βC1 functions and its interactions with host proteins.

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Tomato leaf curl virusand Cotton leaf curl Multan betasatellite can cause mild transient symptoms in cotton

Cited by 9 publications

References 10 publications

A recombinant begomovirus resulting from exchange of the C4 gene

A recombinant begomovirus resulting from exchange of the C4 gene

Cotton leaf curl disease – an emerging threat to cotton production worldwide

An Insight into Cotton Leaf Curl Multan Betasatellite, the Most Important Component of Cotton Leaf Curl Disease Complex

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