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245	1	0	_aInternal Mechanisms of Plant Adaptation to Aluminum Toxicity and Phosphorus Starvation in Three Tropical Forages
490	0		_vJournal of Plant Nutrition, 29(7), p.1243-1255, 2006
520	3		_aMany 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. 'Marand´u')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.
650	1	4	_aACID PHOSPHATASE ACTIVITY
650	1	4	_aALUMINUM TOXICITY
650	1	4	_aALUMINUM-LIGAND COMPLEXES
650	1	4	_aANDROPOGON GAYANUS
650	1	4	_aARACHIS PINTOI
650	1	4	_aBRACHIARIA HYBRID
650	1	4	_aORGANIC-ACID ANIONS
650	1	4	_aPHOSPHORUS STARVATION
700	1	2	_aWatanabe, T.
700	1	2	_aOsaki, M.
700	1	2	_aYano, H.
700	1	2	_aRao, I.M.
856	4	0	_uhttps://drive.google.com/file/d/1Sm8EBpxiDrekoZl4shB9HilAdIRoG_f_/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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