Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages
Many tropical forage grasses and legumes grow well in acid soils, adapting to excess aluminum (Al) and phosphorus (P) starvation stresses by using mechanisms that are still unclear. To determine these mechanisms, responses to Al toxicity and P starvation in three tropical forages were studied: two g...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Informa UK Limited
2006
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/77692 |
| _version_ | 1855538492708225024 |
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| author | Watanabe, Toshihiro Osaki, Mitsuru Yano, Hiromi Rao, Idupulapati M. |
| author_browse | Osaki, Mitsuru Rao, Idupulapati M. Watanabe, Toshihiro Yano, Hiromi |
| author_facet | Watanabe, Toshihiro Osaki, Mitsuru Yano, Hiromi Rao, Idupulapati M. |
| author_sort | Watanabe, Toshihiro |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Many tropical forage grasses and legumes grow well in acid soils, adapting to excess aluminum (Al) and phosphorus (P) starvation stresses by using mechanisms that are still unclear. To determine these mechanisms, responses to Al toxicity and P starvation in three tropical forages were studied: two grasses, Brachiaria hybrid cv. ‘Mulato’ (B. ruziziensis clone 44-06 × B. brizantha cv. ‘Marandú’) and Andropogon gayanus, and one legume, Arachis pintoi. The tropical grasses tolerated high levels of Al toxicity and P starvation, with the Brachiaria hybrid maintaining very low levels of Al concentration in shoots. 27Al Nuclear Magnetic Resonance spectroscopy (NMR) analysis revealed that, in the Brachiaria hybrid, Al makes complexes with some ligands such as organic-acid anions in the root symplast. The forages probably adapted to P starvation through high P-use efficiency. These experiments provide the first direct evidence we know of that organic acid anions within root tissue help detoxify Al in non-accumulator species such as the Brachiaria hybrid. |
| format | Journal Article |
| id | CGSpace77692 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2006 |
| publishDateRange | 2006 |
| publishDateSort | 2006 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace776922025-03-13T09:45:19Z Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages Watanabe, Toshihiro Osaki, Mitsuru Yano, Hiromi Rao, Idupulapati M. feed crops andropogon gayanus arachis pintoi brachiaria adaptation acid soils aluminium soil toxicity phosphorus acid phosphatase plant response adaptación suelo ácido toxicidad del suelo fósforo fosfatasa ácida respuesta de la planta Many tropical forage grasses and legumes grow well in acid soils, adapting to excess aluminum (Al) and phosphorus (P) starvation stresses by using mechanisms that are still unclear. To determine these mechanisms, responses to Al toxicity and P starvation in three tropical forages were studied: two grasses, Brachiaria hybrid cv. ‘Mulato’ (B. ruziziensis clone 44-06 × B. brizantha cv. ‘Marandú’) and Andropogon gayanus, and one legume, Arachis pintoi. The tropical grasses tolerated high levels of Al toxicity and P starvation, with the Brachiaria hybrid maintaining very low levels of Al concentration in shoots. 27Al Nuclear Magnetic Resonance spectroscopy (NMR) analysis revealed that, in the Brachiaria hybrid, Al makes complexes with some ligands such as organic-acid anions in the root symplast. The forages probably adapted to P starvation through high P-use efficiency. These experiments provide the first direct evidence we know of that organic acid anions within root tissue help detoxify Al in non-accumulator species such as the Brachiaria hybrid. 2006-08 2016-11-10T14:28:51Z 2016-11-10T14:28:51Z Journal Article https://hdl.handle.net/10568/77692 en Open Access Informa UK Limited Watanabe, Toshihiro; Osaki, Mitsuru; Yano, Hiromi; Rao, Idupulapati Madhusudana. 2006. Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages . Journal of Plant Nutrition (USA) 29:1243-1255. |
| spellingShingle | feed crops andropogon gayanus arachis pintoi brachiaria adaptation acid soils aluminium soil toxicity phosphorus acid phosphatase plant response adaptación suelo ácido toxicidad del suelo fósforo fosfatasa ácida respuesta de la planta Watanabe, Toshihiro Osaki, Mitsuru Yano, Hiromi Rao, Idupulapati M. Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title | Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title_full | Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title_fullStr | Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title_full_unstemmed | Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title_short | Internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| title_sort | internal mechanisms of plant adaptation to aluminum toxicity and phosphorus starvation in three tropical forages |
| topic | feed crops andropogon gayanus arachis pintoi brachiaria adaptation acid soils aluminium soil toxicity phosphorus acid phosphatase plant response adaptación suelo ácido toxicidad del suelo fósforo fosfatasa ácida respuesta de la planta |
| url | https://hdl.handle.net/10568/77692 |
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