Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo
Exploiting the natural variability of Brachiaria forage germplasm to identify forage grasses adapted to infertile acid soils that contain very low available phosphorus (P) is an important research objective for improving livestock production in the tropics. The objective of this study was to determi...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
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International Center for Tropical Agriculture
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/88133 |
| _version_ | 1855537986918154240 |
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| author | Louw-Gaume, Anna E. Schweizer, Noel Rao, Idupulapati M. Gaume, Alain J. Frossard, Emmanuel |
| author_browse | Frossard, Emmanuel Gaume, Alain J. Louw-Gaume, Anna E. Rao, Idupulapati M. Schweizer, Noel |
| author_facet | Louw-Gaume, Anna E. Schweizer, Noel Rao, Idupulapati M. Gaume, Alain J. Frossard, Emmanuel |
| author_sort | Louw-Gaume, Anna E. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Exploiting the natural variability of Brachiaria forage germplasm to identify forage grasses adapted to infertile acid soils that contain very low available phosphorus (P) is an important research objective for improving livestock production in the tropics. The objective of this study was to determine the differences in the release of root biochemical markers, i.e. carboxylates and acid phosphatases (APases), during the development of P deficiency in signalgrass and ruzigrass. We used the hydroxyapatite pouch system in hydroponics to simulate conditions of low P supply in acid soils to test the response of well-adapted signalgrass (Brachiaria decumbens cv. Basilisk, CIAT 606) and less-adapted ruzigrass (B. ruziziensis cv. Kennedy, CIAT 654). We monitored shoot and root growth and other physiological and biochemical components that are important for root functionality at weekly intervals for 3 weeks. We found that monocarboxylate exudation was not associated with the plant’s physiological P status, while exudation of oxalate and secreted-APases increased with declining plant P concentrations in both grasses. Ruzigrass showed higher exudation rates and grew faster than signalgrass, but could not maintain its initial fast growth rate when P concentrations in plant tissue declined to 1.0 mg P/g dry matter. Oxalate was the dominant exuded carboxylate for signalgrass after 21 days of growth and this response might confer some eco-physiological advantages in signalgrass when grown in low-P acid soils. |
| format | Journal Article |
| id | CGSpace88133 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace881332025-03-13T09:45:16Z Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo Louw-Gaume, Anna E. Schweizer, Noel Rao, Idupulapati M. Gaume, Alain J. Frossard, Emmanuel feed crops acid phosphatases oxalates brachiaria oxalatos Exploiting the natural variability of Brachiaria forage germplasm to identify forage grasses adapted to infertile acid soils that contain very low available phosphorus (P) is an important research objective for improving livestock production in the tropics. The objective of this study was to determine the differences in the release of root biochemical markers, i.e. carboxylates and acid phosphatases (APases), during the development of P deficiency in signalgrass and ruzigrass. We used the hydroxyapatite pouch system in hydroponics to simulate conditions of low P supply in acid soils to test the response of well-adapted signalgrass (Brachiaria decumbens cv. Basilisk, CIAT 606) and less-adapted ruzigrass (B. ruziziensis cv. Kennedy, CIAT 654). We monitored shoot and root growth and other physiological and biochemical components that are important for root functionality at weekly intervals for 3 weeks. We found that monocarboxylate exudation was not associated with the plant’s physiological P status, while exudation of oxalate and secreted-APases increased with declining plant P concentrations in both grasses. Ruzigrass showed higher exudation rates and grew faster than signalgrass, but could not maintain its initial fast growth rate when P concentrations in plant tissue declined to 1.0 mg P/g dry matter. Oxalate was the dominant exuded carboxylate for signalgrass after 21 days of growth and this response might confer some eco-physiological advantages in signalgrass when grown in low-P acid soils. 2017 2017-10-04T20:18:26Z 2017-10-04T20:18:26Z Journal Article https://hdl.handle.net/10568/88133 en Open Access International Center for Tropical Agriculture Louw-Gaume, Anna E.; Schweizer, Noel; Rao, Idupulapati M.; Gaume, Alain J.; Frossard, Emmanuel. 2017. Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo . Tropical Grasslands - Forrejes Tropicales 5(3): 103-116. |
| spellingShingle | feed crops acid phosphatases oxalates brachiaria oxalatos Louw-Gaume, Anna E. Schweizer, Noel Rao, Idupulapati M. Gaume, Alain J. Frossard, Emmanuel Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title | Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title_full | Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title_fullStr | Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title_full_unstemmed | Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title_short | Temporal differences in plant growth and root exudation of two Brachiaria grasses in response to low phosphorus supply = Diferencias en el crecimiento y exudaciones radiculares de dos especies de Brachiaria en respuesta a baja disponibilidad de fósforo |
| title_sort | temporal differences in plant growth and root exudation of two brachiaria grasses in response to low phosphorus supply diferencias en el crecimiento y exudaciones radiculares de dos especies de brachiaria en respuesta a baja disponibilidad de fosforo |
| topic | feed crops acid phosphatases oxalates brachiaria oxalatos |
| url | https://hdl.handle.net/10568/88133 |
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