Data/hora: 12/06/2024 14:21:56

Provedor de dados: 	85	
País: 	Argentina	
Título: 	Nitrogen metabolism in roots and leaves of green bean plants exposed to different phosphorus doses	
Autores: 	Sánchez,E.; Ávila-Quezada,G.; Gardea,A.A.; Muñoz,E.; Ruiz,J.M.; Romero,L.	
Data: 	2009-06-01	
Ano: 	2009	
Palavras-chave: 	Phaseolus vulgaris L.; Nitrogen metabolism; Green bean; Phosphorus; Deficiency; Toxicity.	
Resumo: 	The objective of this work was to determine the effect of different P doses on nitrogen assimilation in roots and leaves of green beans plants (Phaseolus vulgaris L. cv. Strike). Phosphorus was applied in the nutrient solution as H3PO4, at the nutrient doses of: P1 = 0.40 mM; P2 = 0.80 mM; P3 = 1.60 mM; P4 = 3.20 mM; P5 = 4.80 mM, and P6 = 6.40 mM P. Our results indicate that both P toxicity and deficiency gave similar responses to N assimilation. Phosphorus and NO3 - interacted on the absorption and translocation processes affecting N assimilation. The deficiency (P1), and toxicity (P6) treatments, diminished root absorption of NO3- in 15% and 36%, respectively, respect to the optimum dose (P3), thus reducing nutrient availability for assimilation. This result may explain the minimum enzymatic activities observed in NO3 - assimilation in P1 and P6. The minimum N assimilation observed in these treatments will eventually translate into a minimum synthesis of major N organic compound involved in plant growth and development. This will lead to a reduced plant biomass production and productivity of green beans plants.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000100003	
Editor: 	Fundación Rómulo Raggio	
Formato: 	text/html	
Fonte: 	Phyton (Buenos Aires)  v.78 n.1 2009	
Fonte: 	info:eu-repo/semantics/openAccess