Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum
Plant viruses cause metabolic and physiological changes associated with symptomatic disease phenotypes. Symptoms involve direct and indirect effects, which result in disruption of host physiology. We used transgenic tobacco expressing a variant of Tobacco mosaic virus (TMV) coat protein (CPT42W) or movement protein (MP), and a hybrid line (MP×CPT42W) that coexpresses both proteins, to study the plant response to individual viral proteins. Findings employing microarray analysis of MP×CPT42W plants and silenced mp×cpT42W* controls revealed that altered transcripts were mostly downregulated, suggesting a persistent shut-off due to MP×CPT42W expression. Next, we showed that MP triggered reactive oxygen species (ROS) accumulation, reduction of total ascorbate, and expression of ROS scavenging genes. These effects were enhanced when both proteins were coexpressed. MP and MP×CPT42W plants showed increased levels of salicylic acid (SA) and SA-responsive gene expression. Furthermore, these effects were partially reproduced in Nicotiana benthamiana when GMP1 transcript was silenced. CPT42W seems to be playing a negative role in the defense response by reducing the expression of PR-1 and RDR-1. MP and MP×CPT42W transgenic expression promoted a recoverylike phenotype in TMV RNA infections and enhanced susceptibility to Pseudomonas syringae and Sclerotinia sclerotiorum. The individual effects of viral proteins may reflect the ability of a virus to balance its own virulence.
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Format: | info:ar-repo/semantics/artículo biblioteca |
Language: | eng |
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2012
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Subjects: | Nicotiana Tabacum, Tabaco, Proteínas Virales, Estrés Biótico, Virus de las Plantas, ARN, RNA, Plant Viruses, Tobacco, Tobacco Mosaic Virus, |
Online Access: | http://hdl.handle.net/20.500.12123/2181 https://apsjournals.apsnet.org/doi/pdf/10.1094/MPMI-03-12-0075-R https://doi.org/10.1094/MPMI-03-12-0075-R |
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oai:localhost:20.500.12123-21812018-04-05T17:08:55Z Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum Conti, Gabriela Rodriguez, Maria Cecilia Manacorda, Carlos Augusto Asurmendi, Sebastian Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus Plant viruses cause metabolic and physiological changes associated with symptomatic disease phenotypes. Symptoms involve direct and indirect effects, which result in disruption of host physiology. We used transgenic tobacco expressing a variant of Tobacco mosaic virus (TMV) coat protein (CPT42W) or movement protein (MP), and a hybrid line (MP×CPT42W) that coexpresses both proteins, to study the plant response to individual viral proteins. Findings employing microarray analysis of MP×CPT42W plants and silenced mp×cpT42W* controls revealed that altered transcripts were mostly downregulated, suggesting a persistent shut-off due to MP×CPT42W expression. Next, we showed that MP triggered reactive oxygen species (ROS) accumulation, reduction of total ascorbate, and expression of ROS scavenging genes. These effects were enhanced when both proteins were coexpressed. MP and MP×CPT42W plants showed increased levels of salicylic acid (SA) and SA-responsive gene expression. Furthermore, these effects were partially reproduced in Nicotiana benthamiana when GMP1 transcript was silenced. CPT42W seems to be playing a negative role in the defense response by reducing the expression of PR-1 and RDR-1. MP and MP×CPT42W transgenic expression promoted a recoverylike phenotype in TMV RNA infections and enhanced susceptibility to Pseudomonas syringae and Sclerotinia sclerotiorum. The individual effects of viral proteins may reflect the ability of a virus to balance its own virulence. Fil: Conti, Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Rodriguez, Maria Cecilia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Manacorda, Carlos Augusto. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina Fil: Asurmendi, Sebastian. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Biotecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2018-04-05T16:36:04Z 2018-04-05T16:36:04Z 2012 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/2181 https://apsjournals.apsnet.org/doi/pdf/10.1094/MPMI-03-12-0075-R 0894-0282 1943-7706 (online version) https://doi.org/10.1094/MPMI-03-12-0075-R eng info:eu-repo/semantics/openAccess application/pdf Molecular plant-microbe interactions 25 (10) : 1370–1384. (2012) |
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Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus |
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Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus Conti, Gabriela Rodriguez, Maria Cecilia Manacorda, Carlos Augusto Asurmendi, Sebastian Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
description |
Plant viruses cause metabolic and physiological changes
associated with symptomatic disease phenotypes. Symptoms involve direct and indirect effects, which result in disruption
of host physiology. We used transgenic tobacco expressing a variant of Tobacco mosaic virus (TMV) coat protein (CPT42W)
or movement protein (MP), and a hybrid line (MP×CPT42W) that coexpresses both proteins, to study the plant response
to individual viral proteins. Findings employing microarray analysis of MP×CPT42W plants and silenced mp×cpT42W* controls
revealed that altered transcripts were mostly downregulated, suggesting a persistent shut-off due to MP×CPT42W expression. Next, we showed that MP triggered reactive oxygen species (ROS) accumulation, reduction of total ascorbate, and expression of ROS scavenging genes. These effects were enhanced when both proteins were coexpressed. MP and MP×CPT42W plants showed increased levels of salicylic acid (SA) and SA-responsive gene expression. Furthermore, these effects were partially reproduced in Nicotiana benthamiana when GMP1 transcript was silenced. CPT42W seems to be playing a negative role in the defense response by reducing the expression of PR-1 and RDR-1. MP and MP×CPT42W transgenic expression promoted a recoverylike phenotype in TMV RNA infections and enhanced susceptibility to Pseudomonas syringae and Sclerotinia sclerotiorum. The individual effects of viral proteins may reflect the ability of a virus to balance its own virulence. |
format |
info:ar-repo/semantics/artículo |
topic_facet |
Nicotiana Tabacum Tabaco Proteínas Virales Estrés Biótico Virus de las Plantas ARN RNA Plant Viruses Tobacco Tobacco Mosaic Virus |
author |
Conti, Gabriela Rodriguez, Maria Cecilia Manacorda, Carlos Augusto Asurmendi, Sebastian |
author_facet |
Conti, Gabriela Rodriguez, Maria Cecilia Manacorda, Carlos Augusto Asurmendi, Sebastian |
author_sort |
Conti, Gabriela |
title |
Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
title_short |
Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
title_full |
Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
title_fullStr |
Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
title_full_unstemmed |
Transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in Nicotiana tabacum |
title_sort |
transgenic expression of tobacco mosaic virus capsid and movement proteins modulate plant basal defense and biotic stress responses in nicotiana tabacum |
publishDate |
2012 |
url |
http://hdl.handle.net/20.500.12123/2181 https://apsjournals.apsnet.org/doi/pdf/10.1094/MPMI-03-12-0075-R https://doi.org/10.1094/MPMI-03-12-0075-R |
work_keys_str_mv |
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