Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis
Bud viability after various defoliation frequency treatments was determined in the perennial bunchgrass Poa ligularis under arid field conditions from 2002 to 2005. Bud respiratory activity was examined on various stem base hierarchies using the tetrazolium test, as validated with the vital stain E...
| Autores principales: | , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
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Wiley
2024
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/18065 https://esj-journals.onlinelibrary.wiley.com/doi/10.1007/s11284-011-0857-9 https://doi.org/10.1007/s11284-011-0857-9 |
| _version_ | 1855037733032951808 |
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| author | Busso, Carlos Alberto Gittins Lopez, Cecilia Gabriela Becker, Guillermo Fernando Ghermandi, Luciana |
| author_browse | Becker, Guillermo Fernando Busso, Carlos Alberto Ghermandi, Luciana Gittins Lopez, Cecilia Gabriela |
| author_facet | Busso, Carlos Alberto Gittins Lopez, Cecilia Gabriela Becker, Guillermo Fernando Ghermandi, Luciana |
| author_sort | Busso, Carlos Alberto |
| collection | INTA Digital |
| description | Bud viability after various defoliation frequency treatments was determined in the perennial bunchgrass Poa ligularis under arid field conditions from 2002 to 2005. Bud respiratory activity was examined on various stem base hierarchies using the tetrazolium test,
as validated with the vital stain Evan’s blue. The hypothesis of this work was that the total and viable axillary bud numbers on stem bases of all study stem base hierarchies are reduced as defoliation frequency increases. Interpretation of the results differed when they were expressed as a percentage rather than on a number per stem base basis. The total number of axillary buds per stem base was similar in all defoliation frequencies. When the results were expressed on a percentage basis, the order on stem bases having metabolically active buds was daughter tillers > stem bases with green tillers > stem bases without green tillers in all defoliation frequencies. The reverse order was found when considering dead buds. How the results are expressed thus deserves our attention when reporting results on bud viability in perennial grasses. An increased defoliation frequency increased the percentage of dead and dormant buds after the third or fourth defoliation of P. ligularis during the 1st study year. These percentages of bud viability, however, increased after the first defoliation during the 2nd study year. Bud viability was affected not only by the cumulative effects of defoliation but also by climatic variables throughout the seasons. However, our results show that P. ligularis can be defoliated up to twice a year without affecting bud viability, and thus its potential capacity for regrowth after defoliation. |
| format | info:ar-repo/semantics/artículo |
| id | INTA18065 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA180652024-06-07T12:28:37Z Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis Busso, Carlos Alberto Gittins Lopez, Cecilia Gabriela Becker, Guillermo Fernando Ghermandi, Luciana Poa Defoliación Macollamiento Defoliation Tillering Bud Viability Defoliation Frecuency Perennial Grass Viabilidad de las Yemas Frecuencia de Defoliación Hierba Perenne Poa ligularis Bud viability after various defoliation frequency treatments was determined in the perennial bunchgrass Poa ligularis under arid field conditions from 2002 to 2005. Bud respiratory activity was examined on various stem base hierarchies using the tetrazolium test, as validated with the vital stain Evan’s blue. The hypothesis of this work was that the total and viable axillary bud numbers on stem bases of all study stem base hierarchies are reduced as defoliation frequency increases. Interpretation of the results differed when they were expressed as a percentage rather than on a number per stem base basis. The total number of axillary buds per stem base was similar in all defoliation frequencies. When the results were expressed on a percentage basis, the order on stem bases having metabolically active buds was daughter tillers > stem bases with green tillers > stem bases without green tillers in all defoliation frequencies. The reverse order was found when considering dead buds. How the results are expressed thus deserves our attention when reporting results on bud viability in perennial grasses. An increased defoliation frequency increased the percentage of dead and dormant buds after the third or fourth defoliation of P. ligularis during the 1st study year. These percentages of bud viability, however, increased after the first defoliation during the 2nd study year. Bud viability was affected not only by the cumulative effects of defoliation but also by climatic variables throughout the seasons. However, our results show that P. ligularis can be defoliated up to twice a year without affecting bud viability, and thus its potential capacity for regrowth after defoliation. EEA Alto Valle Fil: Busso, Carlos Alberto. Universidad Nacional del Sur. Departamento de Agronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Recursos Naturales Renovables de la Zona Semiárida (CERZOS); Argentina. Fil: Gittins López, Cecilia Gabriela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina Fil: Becker, Guillermo Fernando. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche; Argentina Fil: Ghermandi, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA). Laboratorio ECOTONO; Argentina. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA). Laboratorio ECOTONO; Argentina 2024-06-07T12:10:46Z 2024-06-07T12:10:46Z 2011-06-21 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/18065 https://esj-journals.onlinelibrary.wiley.com/doi/10.1007/s11284-011-0857-9 0912-3814 1440-1703 (Online) https://doi.org/10.1007/s11284-011-0857-9 eng info:eu-repo/semantics/restrictedAccess 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 Wiley Ecological Research 26 (5) : 985-997 (September 2011) |
| spellingShingle | Poa Defoliación Macollamiento Defoliation Tillering Bud Viability Defoliation Frecuency Perennial Grass Viabilidad de las Yemas Frecuencia de Defoliación Hierba Perenne Poa ligularis Busso, Carlos Alberto Gittins Lopez, Cecilia Gabriela Becker, Guillermo Fernando Ghermandi, Luciana Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title | Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title_full | Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title_fullStr | Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title_full_unstemmed | Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title_short | Tiller hierarchy and defoliation frequency determine bud viability in the grass Poa ligularis |
| title_sort | tiller hierarchy and defoliation frequency determine bud viability in the grass poa ligularis |
| topic | Poa Defoliación Macollamiento Defoliation Tillering Bud Viability Defoliation Frecuency Perennial Grass Viabilidad de las Yemas Frecuencia de Defoliación Hierba Perenne Poa ligularis |
| url | http://hdl.handle.net/20.500.12123/18065 https://esj-journals.onlinelibrary.wiley.com/doi/10.1007/s11284-011-0857-9 https://doi.org/10.1007/s11284-011-0857-9 |
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