Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization?
Rice blast, caused by Magnaporthe oryzae, causes yield losses associated with injuries on leaves and necks, the latter being in general far more important than the former. Many questions remain on the relationships between leaf and neck blast, including questions related to the population biology of...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Public Library of Science
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/165638 |
| _version_ | 1855543248415621120 |
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| author | Ghatak, Abhijeet Willocquet, Laetitia Savary, Serge Kumar, Jatinder |
| author_browse | Ghatak, Abhijeet Kumar, Jatinder Savary, Serge Willocquet, Laetitia |
| author_facet | Ghatak, Abhijeet Willocquet, Laetitia Savary, Serge Kumar, Jatinder |
| author_sort | Ghatak, Abhijeet |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice blast, caused by Magnaporthe oryzae, causes yield losses associated with injuries on leaves and necks, the latter being in general far more important than the former. Many questions remain on the relationships between leaf and neck blast, including questions related to the population biology of the pathogen. Our objective was to test the hypothesis of adaptation of M. oryzae isolates to the type of organ they infect. To that aim, the components of aggressiveness of isolates originating from leaves and necks were measured. Infection efficiency, latent period, sporulation intensity, and lesion size were measured on both leaves and necks. Univariate and multivariate analyses indicated that isolates originating from leaves were less aggressive than isolates originating from necks, when aggressiveness components were measured on leaves as well as on necks, indicating that there is no specialization within the pathogen population with respect to the type of organ infected. This result suggests that the more aggressive isolates involved in epidemics on leaves during the vegetative stage of the crop cycle have a higher probability to infect necks, and that a population shift may occur during disease transmission from leaves to necks. Implications for disease management are discussed. |
| format | Journal Article |
| id | CGSpace165638 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Public Library of Science |
| publisherStr | Public Library of Science |
| record_format | dspace |
| spelling | CGSpace1656382025-01-24T14:21:05Z Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? Ghatak, Abhijeet Willocquet, Laetitia Savary, Serge Kumar, Jatinder blast disease control disease resistance leaves magnaporthe oryzae pathogens plant diseases plant pathogenic fungi yield losses Rice blast, caused by Magnaporthe oryzae, causes yield losses associated with injuries on leaves and necks, the latter being in general far more important than the former. Many questions remain on the relationships between leaf and neck blast, including questions related to the population biology of the pathogen. Our objective was to test the hypothesis of adaptation of M. oryzae isolates to the type of organ they infect. To that aim, the components of aggressiveness of isolates originating from leaves and necks were measured. Infection efficiency, latent period, sporulation intensity, and lesion size were measured on both leaves and necks. Univariate and multivariate analyses indicated that isolates originating from leaves were less aggressive than isolates originating from necks, when aggressiveness components were measured on leaves as well as on necks, indicating that there is no specialization within the pathogen population with respect to the type of organ infected. This result suggests that the more aggressive isolates involved in epidemics on leaves during the vegetative stage of the crop cycle have a higher probability to infect necks, and that a population shift may occur during disease transmission from leaves to necks. Implications for disease management are discussed. 2013-06-11 2024-12-19T12:55:17Z 2024-12-19T12:55:17Z Journal Article https://hdl.handle.net/10568/165638 en Open Access Public Library of Science Ghatak, Abhijeet; Willocquet, Laetitia; Savary, Serge and Kumar, Jatinder. 2013. Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization?. PLoS ONE, Volume 8 no. 6 p. e66180 |
| spellingShingle | blast disease control disease resistance leaves magnaporthe oryzae pathogens plant diseases plant pathogenic fungi yield losses Ghatak, Abhijeet Willocquet, Laetitia Savary, Serge Kumar, Jatinder Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title | Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title_full | Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title_fullStr | Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title_full_unstemmed | Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title_short | Variability in aggressiveness of rice blast (Magnaporthe oryzae) isolates originating from rice leaves and necks: a case of pathogen specialization? |
| title_sort | variability in aggressiveness of rice blast magnaporthe oryzae isolates originating from rice leaves and necks a case of pathogen specialization |
| topic | blast disease control disease resistance leaves magnaporthe oryzae pathogens plant diseases plant pathogenic fungi yield losses |
| url | https://hdl.handle.net/10568/165638 |
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