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...

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Autores principales:	Maumary,Roxana L, Pioli,Rosanna N, Amsler,Alicia, Ivancovich,Antonio
Lenguaje:	English
Publicado:	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias 2016
Materias:	Phakopsora pachyrhizi inoculum viability environmental conditions
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000300001
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spelling	oai:scielo:S0719-389020160003000012017-01-27GERMINATION AND INFECTION OF Phakopsora pachyrhizi UNDER SIMULATED ENVIRONMENT OF THE CENTRAL AREA OF SANTA FE, ARGENTINAMaumary,Roxana LPioli,Rosanna NAmsler,AliciaIvancovich,Antonio Phakopsora pachyrhizi inoculum viability environmental conditions 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.info:eu-repo/semantics/openAccessUniversidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias VeterinariasChilean journal of agricultural & animal sciences v.32 n.3 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000300001en10.4067/S0719-38902016005000001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Phakopsora pachyrhizi inoculum viability environmental conditions
spellingShingle	Phakopsora pachyrhizi inoculum viability environmental conditions Maumary,Roxana L Pioli,Rosanna N Amsler,Alicia Ivancovich,Antonio GERMINATION AND INFECTION OF Phakopsora pachyrhizi UNDER SIMULATED ENVIRONMENT OF THE CENTRAL AREA OF SANTA FE, ARGENTINA
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.
author	Maumary,Roxana L Pioli,Rosanna N Amsler,Alicia Ivancovich,Antonio
author_facet	Maumary,Roxana L Pioli,Rosanna N Amsler,Alicia Ivancovich,Antonio
author_sort	Maumary,Roxana L
title	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_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_sort	germination and infection of phakopsora pachyrhizi under simulated environment of the central area of santa fe, argentina
publisher	Universidad de Concepción. Facultad de Agronomía, Facultad de Ingeniería Agricola y Facultad de Ciencias Veterinarias
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0719-38902016000300001
work_keys_str_mv	AT maumaryroxanal germinationandinfectionofphakopsorapachyrhiziundersimulatedenvironmentofthecentralareaofsantafeargentina AT piolirosannan germinationandinfectionofphakopsorapachyrhiziundersimulatedenvironmentofthecentralareaofsantafeargentina AT amsleralicia germinationandinfectionofphakopsorapachyrhiziundersimulatedenvironmentofthecentralareaofsantafeargentina AT ivancovichantonio germinationandinfectionofphakopsorapachyrhiziundersimulatedenvironmentofthecentralareaofsantafeargentina
_version_	1714207148351684608

GERMINATION AND INFECTION OF Phakopsora pachyrhizi UNDER SIMULATED ENVIRONMENT OF THE CENTRAL AREA OF SANTA FE, ARGENTINA

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