Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina
Soybean asian rust (SAR) caused by the fungus Phakopsora pachyrhizi was confirmed in Argentina for the first time during the 2002-2003 growing season. Then, the disease spread to the Northern and Eastern provinces, reaching the central area of Santa Fe, which is one of the main agricultural areas of...
| Autores principales: | , , , |
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| Formato: | info:eu-repo/semantics/article |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/898 http://www.scielo.cl/pdf/chjaasc/v32n3/aop0116.pdf http://dx.doi.org/10.4067/S0719-38902016005000001 |
| _version_ | 1855034717041065984 |
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| author | Maumary, Roxana Lorena Pioli, Rossana N. Amsler, Alicia Ivancovich, Antonio Juan |
| author_browse | Amsler, Alicia Ivancovich, Antonio Juan Maumary, Roxana Lorena Pioli, Rossana N. |
| author_facet | Maumary, Roxana Lorena Pioli, Rossana N. Amsler, Alicia Ivancovich, Antonio Juan |
| author_sort | Maumary, Roxana Lorena |
| collection | INTA Digital |
| description | Soybean asian rust (SAR) caused by the fungus Phakopsora pachyrhizi was confirmed in Argentina for the first time during the 2002-2003 growing season. Then, the disease spread to the Northern and Eastern provinces, reaching the central area of Santa Fe, which is one of the main agricultural areas of the country. However, the disease has been usually detected at the end of the growing season (late March to early April), causing little or no impact on grain and seeds production. The objectives of this study were: i) characterize, molecularly and morphologically, the isolates of P. pachyrhizi from this area; ii) evaluate the effect of two environmental combinations (a typical for the region and other optimal as a control) on the germination of urediniospores in laboratory conditions; and iii) assess the infecting capacity of the inoculum obtained and the disease progress promoted under greenhouse conditions. Morphologic, molecular and pathometric characteristics of uredinia and urediniospores allowed verifying P. pachyrhizi identity. Uredospores exposed to daily temperatures ranging from 35 to 25°C, combined with a photoperiod and humidity conditions similar to those typical of the central area of Santa Fe during the crop cycle, decreased germination and appressoria formation and, consequently, SAR symptoms and uredinia production. These biological and epidemiological features would explain the erratic occurrence of SAR in the central producing area of Santa Fe, Argentina. Therefore, these could be used as references to design crop management strategies aimed at decreasing disease impact in other production areas |
| format | info:eu-repo/semantics/article |
| id | INTA898 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | INTA8982025-03-18T10:10:30Z Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina Maumary, Roxana Lorena Pioli, Rossana N. Amsler, Alicia Ivancovich, Antonio Juan Enfermedades de las Plantas Phakopsora pachyrhizi Inoculación Medio Ambiente Plant Diseases Inoculation Environment Soybean asian rust (SAR) caused by the fungus Phakopsora pachyrhizi was confirmed in Argentina for the first time during the 2002-2003 growing season. Then, the disease spread to the Northern and Eastern provinces, reaching the central area of Santa Fe, which is one of the main agricultural areas of the country. However, the disease has been usually detected at the end of the growing season (late March to early April), causing little or no impact on grain and seeds production. The objectives of this study were: i) characterize, molecularly and morphologically, the isolates of P. pachyrhizi from this area; ii) evaluate the effect of two environmental combinations (a typical for the region and other optimal as a control) on the germination of urediniospores in laboratory conditions; and iii) assess the infecting capacity of the inoculum obtained and the disease progress promoted under greenhouse conditions. Morphologic, molecular and pathometric characteristics of uredinia and urediniospores allowed verifying P. pachyrhizi identity. Uredospores exposed to daily temperatures ranging from 35 to 25°C, combined with a photoperiod and humidity conditions similar to those typical of the central area of Santa Fe during the crop cycle, decreased germination and appressoria formation and, consequently, SAR symptoms and uredinia production. These biological and epidemiological features would explain the erratic occurrence of SAR in the central producing area of Santa Fe, Argentina. Therefore, these could be used as references to design crop management strategies aimed at decreasing disease impact in other production areas La roya asiática de la soja (RAS) causado por el hongo Phakopsora pachyrhizi fue citado por primera vez en Argentina durante la campaña 2002-2003. Luego la enfermedad se diseminó a las provincias del norte del país y la región centro norte de Santa Fe. RAS ocurre usualmente al final del período reproductivo del cultivo (finales de marzo hasta principios de abril) causando poco o ningún impacto sobre la producción de granos y semillas. Los objetivos de este estudio fueron: i) caracterizar molecular y morfológicamente los aislamientos de P. pachyrhizi del área central de Santa Fe, ii) evaluar el efecto de dos combinaciones ambientales (una típica de la región y otra óptima como control) sobre la germinación de las urediniosporas en laboratorio; y iii) evaluar la capacidad infectiva del inóculo obtenido y el progreso de la enfermedad generado bajo condiciones de invernadero. La caracterización molecular y morfológica de uredinios y urediniosporas permitieron verificar la identidad de P. pachyrhizi. Las esporas expuestas al rango térmico diario 35/25°C con fotoperíodo y humedad similares a las condiciones típicas del centro de Santa Fe, disminuyeron la germinación y formación de apresorios y, en consecuencia, la aparición de síntomas y producción de uredinios de RAS. Los resultados biológicos y epidemiológicos obtenidos podrían explicar la baja frecuencia de ocurrencia de RAS en la región central de Santa Fe, Argentina, y pueden ser tomados como referencia al diseñar estrategias de manejo de cultivo orientadas a minimizar el impacto de la enfermedad en otras áreas productivas. EEA Pergamino Fil: Maumary, Roxana L. Universidad Nacional del Litoral. Facultad de Agronomía; Argentina Fil: Pioli, Rossana N. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Investigaciones en Ciencias Agrarias de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias. Instituto de Investigaciones en Ciencias Agrarias de Rosario; Argentina Fil: Amsler, Alicia. Universidad Nacional del Litoral. Facultad de Agronomía; Argentina Fil: Ivancovich, Antonio Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina 2017-08-04T14:47:33Z 2017-08-04T14:47:33Z 2016 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/898 http://www.scielo.cl/pdf/chjaasc/v32n3/aop0116.pdf 0719-3890 http://dx.doi.org/10.4067/S0719-38902016005000001 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Santa Fe (province) Chilean journal of agricultural & animal sciences 32 (3) : 173-183 |
| spellingShingle | Enfermedades de las Plantas Phakopsora pachyrhizi Inoculación Medio Ambiente Plant Diseases Inoculation Environment Maumary, Roxana Lorena Pioli, Rossana N. Amsler, Alicia Ivancovich, Antonio Juan Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title | Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title_full | Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title_fullStr | Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title_full_unstemmed | Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title_short | Germination and infection of Phakopsora pachyrhizi under simulated environment of the central area of Santa Fe, Argentina |
| title_sort | germination and infection of phakopsora pachyrhizi under simulated environment of the central area of santa fe argentina |
| topic | Enfermedades de las Plantas Phakopsora pachyrhizi Inoculación Medio Ambiente Plant Diseases Inoculation Environment |
| url | http://hdl.handle.net/20.500.12123/898 http://www.scielo.cl/pdf/chjaasc/v32n3/aop0116.pdf http://dx.doi.org/10.4067/S0719-38902016005000001 |
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