NgRDR1, an RNA-dependent RNA polymerase isolated from Nicotiana glutinosa, was involved in biotic and abiotic stresses

Liu, Yan; Gao, Qinghai; Wu, Bin; Ai, Ting; Guo, Xingqi

doi:10.1016/j.plaphy.2008.12.017

Cited by 42 publications

(30 citation statements)

References 45 publications

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“…Among these, it has been described that RDR1 is induced as a consequence of SA treatments in different plant species (Liu et al, 2009;Quilis et al, 2008;Xie et al, 2001;Yang et al, 2004;Yu et al, 2003). Our results are added to those already described, since they indicate that ToRDR1 is induced as a result of exogenous SA treatments in tomato.…”

Section: Discussionsupporting

confidence: 77%

“…Among them, NtRdRP activity has been found to increase in tobacco plants following SA treatment (Xie et al, 2001). Orthologous genes of NtRDR1 have been also characterized in other species, such as Nicotiana glutinosa (NgRDR1), N. benthamiana (NbRDR1m), A. thaliana (AtRDR1), Medicago truncatula (MtRDR1) and rice (OsRDR1), being all of them induced by both viral infection and SA treatments (Liu et al, 2009;Quilis et al, 2008;Yang et al, 2004;Yu et al, 2003). Besides, certain viral silencing suppressor proteins also suppress SAmediated defence (Ji and Ding, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Salicylic acid and gentisic acid induce RNA silencing-related genes and plant resistance to RNA pathogens

Campos

Granell

Tárraga

et al. 2014

Plant Physiology and Biochemistry

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ElsevierCampos Beneyto, L.; Granell Albert, P.; Tarraga Herrero, S.; López Gresa, MP.; Conejero Tomás, V.; Belles Albert, JM.; Rodrigo Bravo, I.... (2014) AbstractWe have observed that treatments with salicylic acid (SA) or gentisic acid (GA) induced resistance to RNA pathogens such as ToMV and CEVd in tomato and Gynura auriantiaca, respectively. Accumulation of SA and GA has been found to occur in plants infected by these pathogens, thus pointing out a possible defence role of both molecules. To study the molecular basis of the observed induced resistance to RNA pathogens the induction of silencing-related genes by SA and GA was considered. For that purpose, we searched for tomato genes which were orthologous to those described in Arabidopsis thaliana, such as AtDCL1, AtDCL2, AtDCL4, AtRDR1, AtRDR2 and AtRDR6, and we tracked their induction in tomato along virus and viroid infections. We observed that CEVd significantly induced all these genes in tomato, with the exception of ToRDR6, being the induction of ToDCL4 the most outstanding. Regarding the ToMV asymptomatic infection, with the exception of ToRDR2, we observed a significant induction of all the indicated silencing-related genes, being ToDCL2 the most induced gene. Subsequently, we analyzed their transcriptional activation by SA and at the time when ToMV was inoculated on plants. ToDCL2, ToRDR1 and ToRDR2 were significantly induced by both SA and GA, whereas ToDCL1 was only induced by SA. Such an induction resulted more effective by SA treatment, which is in agreement with the stronger SA-induced resistance observed. Our results suggest that the observed delay in the RNA pathogen accumulation could be due to the pre-induction of RNA silencing-related genes by SA or GA. Highlights-Treatments with salicylic acid or gentisic acid induce resistance to RNA pathogens -Induction of tomato silencing-related genes by RNA pathogen infections is studied -Induction of RNA silencing by SA or GA treatments is analysed in tomato plants -New connexions between RNA silencing and the SA or GA response are proposed

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Salicylic acid and gentisic acid induce RNA silencing-related genes and plant resistance to RNA pathogens

Campos

Granell

Tárraga

et al. 2014

Plant Physiology and Biochemistry

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“…Moreover, it was shown that transgenic NtRDR1 antisense tobacco plants are more susceptible to TMV infection than wild-type plants (Xie et al, 2001). There are many reports demonstrating the role played by RDR1 and RDR6 in the defence against viruses (Pandey and Baldwin, 2007;Liu et al, 2009;Rakhshandehroo et al, 2009;Qin et al, 2012;Liao et al, 2014;Lee et al, 2016). Thus, there are several reports which support the RDR1 contribution to the antiviral defence mechanism during Tobamovirus infections.…”

Section: Rna Interference-mediated Resistancementioning

confidence: 98%

“…In Nicotiana tabacum, NtRDR1 activity was found to increase transcriptional levels following SA treatment (Xie et al, 2001). Orthologous genes of NtRDR1 have also been characterized in other species, such as Nicotiana glutinosa (NgRDR1), Nicotiana benthamiana (NbRDR1m), A. thaliana (AtRDR1), Medicago truncatula (MtRDR1) and rice (OsRDR1), all of them being induced by both viral infection and SA treatment (Yu et al, 2003;Yang et al, 2004;Quilis et al, 2008;Liu et al, 2009). Several findings indicate that RDR1 could be involved in the SA-induced resistance against viruses (Alamillo et al, 2006;Lee et al, 2016).…”

Section: Rna Interference-mediated Resistancementioning

confidence: 99%

“…The most studied evidence is the interaction of the helicase domain p50 with the tobacco N gene, which triggers host programmed cell death, resulting in an incompatible interaction (Caplan et al, 2008). In contrast, during compatible interactions, the transgenic expression of the 126 kDa replicase subunit in N. tabacum produces enhanced susceptibility to several viruses (Liu et al, 2009). It was reported that TMV replicase interacts and interferes with the activity of ATAF2, a NAC domain transcription factor whose overexpression inhibits TMV accumulation (Wang et al, 2009).…”

Section: Effects Of Tmv Replicase Proteinmentioning

confidence: 99%

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Modulation of host plant immunity by Tobamovirus proteins

Conti

Rodríguez

Venturuzzi

et al. 2016

Ann Bot

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Background To establish successful infection, plant viruses produce profound alterations of host physiology, disturbing unrelated endogenous processes and contributing to the development of disease. In tobamoviruses, emerging evidence suggests that viral-encoded proteins display a great variety of functions beyond the canonical roles required for virus structure and replication. Among these, their modulation of host immunity appears to be relevant in infection progression.Scope In this review, some recently described effects on host plant physiology of Tobacco mosaic virus (TMV)-encoded proteins, namely replicase, movement protein (MP) and coat protein (CP), are summarized. The discussion is focused on the effects of each viral component on the modulation of host defense responses, through mechanisms involving hormonal imbalance, innate immunity modulation and antiviral RNA silencing. These effects are described taking into consideration the differential spatial distribution and temporality of viral proteins during the dynamic process of replication and spread of the virus.Conclusion In discussion of these mechanisms, it is shown that both individual and combined effects of viralencoded proteins contribute to the development of the pathogenesis process, with the host plant's ability to control infection to some extent potentially advantageous to the invading virus.

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Molecular characterization, immunohistochemical localization and expression of a ribosomal protein L17 gene from Apis cerana cerana

Meng

Zhang

Kang

et al. 2010

Arch Insect Biochem Physiol

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Ribosomal protein L17 (RPL17) is a core protein of the large (60S) ribosomal subunit and plays an important role in protein synthesis. In this report, a RPL17 gene was isolated from Apis cerana cerana, designated as AccRPL17. Alignment analysis showed that AccRPL17 exhibits high homology to other known RPL17s. Moreover, genomic sequence analysis revealed that five exons are splitted by four introns, and the position of the first intron is comparatively conservative, being localized in the 5' untranslated region. Partial putative cis-acting elements related to development were also examined. Quantitative real-time PCR showed that the highest mRNA level was detected in larvae on the fifth day. Simultaneously, immunohistochemical localization showed that AccRPL17 is primarily concentrated in muscular tissues, stigma, body wall, and the surrounding of the eye in the fifth-instar larvae. Further studies suggested that AccRPL17 might be involved in responses to abiotic stresses. This is a report attempting to analyze the expression and distribution of RPL17 in A. cerana cerana. These results indicated that AccRPL17 might play an important role in insect development, and the importance of AccRPL17 in participating in abiotic stresses is discussed.

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NgRDR1, an RNA-dependent RNA polymerase isolated from Nicotiana glutinosa, was involved in biotic and abiotic stresses

Cited by 42 publications

References 45 publications

Salicylic acid and gentisic acid induce RNA silencing-related genes and plant resistance to RNA pathogens

Salicylic acid and gentisic acid induce RNA silencing-related genes and plant resistance to RNA pathogens

Modulation of host plant immunity by Tobamovirus proteins

Molecular characterization, immunohistochemical localization and expression of a ribosomal protein L17 gene from Apis cerana cerana

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