Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity
Despite the extensive use of glyphosate, how it alters the physiology and metabolism of plants is still unclear. Photosynthesis is not regarded to be a primary inhibitory target of glyphosate, but it has been reported to be affected by this herbicide. The aim of the current research was to determine...
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| Format: | Artículo |
| Language: | Inglés |
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2018
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| Online Access: | https://www.sciencedirect.com/science/article/pii/S0981942812001416 http://hdl.handle.net/20.500.12123/2443 https://doi.org/10.1016/j.plaphy.2012.05.027 |
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| author | Yanniccari, Marcos Ezequiel Tambussi, Eduardo Istilart, Carolina Maria Castro, Ana Maria |
| author_browse | Castro, Ana Maria Istilart, Carolina Maria Tambussi, Eduardo Yanniccari, Marcos Ezequiel |
| author_facet | Yanniccari, Marcos Ezequiel Tambussi, Eduardo Istilart, Carolina Maria Castro, Ana Maria |
| author_sort | Yanniccari, Marcos Ezequiel |
| collection | INTA Digital |
| description | Despite the extensive use of glyphosate, how it alters the physiology and metabolism of plants is still unclear. Photosynthesis is not regarded to be a primary inhibitory target of glyphosate, but it has been reported to be affected by this herbicide. The aim of the current research was to determine the effects of glyphosate on the light and dark reactions of photosynthesis by comparing glyphosate-susceptible and glyphosate-resistant Lolium perenne biotypes. After glyphosate treatment, accumulation of reduced carbohydrates occurred before a decrease in gas exchange. Stomatal conductance and CO2 assimilation were reduced earlier than chlorophyll fluorescence and the amount of chlorophyll in susceptible plants. In the glyphosate-resistant biotype, stomatal conductance was the only parameter slightly affected only 5 days post-application. In susceptible plants, the initial glyphosate effects on gas exchange could be a response to a feedback regulation of photosynthesis. Since the herbicide affects actively growing tissues regardless of the inhibition of photosynthesis, the demand of assimilates decreased and consequently induced an accumulation of carbohydrates in leaves. We concluded that stomatal conductance could be a very sensitive parameter to assess both the susceptibility/resistance to glyphosate before the phytotoxic symptoms become evident. |
| format | Artículo |
| id | INTA2443 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA24432018-06-29T12:08:53Z Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity Yanniccari, Marcos Ezequiel Tambussi, Eduardo Istilart, Carolina Maria Castro, Ana Maria Glifosato Clorofilas Lolium Perenne Herbicidas Biotipos Glyphosate Chlorophylls Herbicides Biotypes Despite the extensive use of glyphosate, how it alters the physiology and metabolism of plants is still unclear. Photosynthesis is not regarded to be a primary inhibitory target of glyphosate, but it has been reported to be affected by this herbicide. The aim of the current research was to determine the effects of glyphosate on the light and dark reactions of photosynthesis by comparing glyphosate-susceptible and glyphosate-resistant Lolium perenne biotypes. After glyphosate treatment, accumulation of reduced carbohydrates occurred before a decrease in gas exchange. Stomatal conductance and CO2 assimilation were reduced earlier than chlorophyll fluorescence and the amount of chlorophyll in susceptible plants. In the glyphosate-resistant biotype, stomatal conductance was the only parameter slightly affected only 5 days post-application. In susceptible plants, the initial glyphosate effects on gas exchange could be a response to a feedback regulation of photosynthesis. Since the herbicide affects actively growing tissues regardless of the inhibition of photosynthesis, the demand of assimilates decreased and consequently induced an accumulation of carbohydrates in leaves. We concluded that stomatal conductance could be a very sensitive parameter to assess both the susceptibility/resistance to glyphosate before the phytotoxic symptoms become evident. EEA Barrow Fil: Yanniccari, Marcos Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina Fil: Tambussi, Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina Fil: Istilart, Carolina Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Chacra Experimental Integrada Barrow; Argentina Fil: Castro, Ana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina 2018-05-22T12:01:13Z 2018-05-22T12:01:13Z 2012-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0981942812001416 http://hdl.handle.net/20.500.12123/2443 0981-9428 https://doi.org/10.1016/j.plaphy.2012.05.027 eng info:eu-repo/semantics/restrictedAccess application/pdf Plant physiology and ´biochemistry 57 : 210-217. (August 2012) |
| spellingShingle | Glifosato Clorofilas Lolium Perenne Herbicidas Biotipos Glyphosate Chlorophylls Herbicides Biotypes Yanniccari, Marcos Ezequiel Tambussi, Eduardo Istilart, Carolina Maria Castro, Ana Maria Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title | Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title_full | Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title_fullStr | Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title_full_unstemmed | Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title_short | Glyphosate effects on gas exchange and chlorophyll fluorescence responses of two Lolium perenne L. biotypes with differential herbicide sensitivity |
| title_sort | glyphosate effects on gas exchange and chlorophyll fluorescence responses of two lolium perenne l biotypes with differential herbicide sensitivity |
| topic | Glifosato Clorofilas Lolium Perenne Herbicidas Biotipos Glyphosate Chlorophylls Herbicides Biotypes |
| url | https://www.sciencedirect.com/science/article/pii/S0981942812001416 http://hdl.handle.net/20.500.12123/2443 https://doi.org/10.1016/j.plaphy.2012.05.027 |
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