Data/hora: 23/09/2024 11:21:36

Biblioteca(s): 	Embrapa Milho e Sorgo; Embrapa Recursos Genéticos e Biotecnologia.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Data corrente: 	11/05/2000	
Data da última atualização: 	16/08/2024	
Autoria: 	MAGALHAES, J. V. de; ALVES, V. M. C.; NOVAIS, R. F.; MOSQUIM, P. R.; MAGALHAES, J. R.; BAHIA FILHO, A. F. C.; HUBER, D. M.	
Título: 	Influence of phosphorus stress on Ammonium uptake by maize.	
Ano de publicação: 	2000	
Fonte/Imprenta: 	Journal of Plant Nutrition, v.23, n.2, p.263-273, 2000.	
Idioma: 	Inglês	
Notas: 	Produção científica/2000/CENARGEN.	
Conteúdo: 	The effect of phosphorus (P) starvation on ammonium (NH4) uptake was evaluated by growing single-cross seedlings of the make progenitor of the maize double-cross hybrid BR 201 in nutrient solution. The kinetics of NH4 uptake were measured after P starvation and non-starvation periodo of 2, 4, 6, 8 and 10 days. The effect of P addition during the study period (resupply) was also tested. Ammonium uptake decreased 45,7% after two days of P stress completed to the fully P-sufficient control. Ammonium uptake decreased 83,0% where P was withheld for 10 days. The decline in NH4 uptake was partially reversed when P was resupplied during the early periods of P deficiency, but this effect diminished as the P stress increased. These results suggest that maize plants are physiologically dependent on NH4, rather than nitrate (NO3) when under P stress.	
Palavras-Chave: 	Ammonium; Ammonium uptake; Amonio; BR 201; Estresse; Hybrid; Maize; Phosphorus stress.	
Thesagro: 	Absorção; Amônia; Fósforo; Milho Hibrido; Stress; Zea Mays.	
Thesaurus Nal: 	phosphorus.	
Categoria do assunto: 	--
F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/177664/1/ID-221641.pdf	
Registro original: 	Embrapa Recursos Genéticos e Biotecnologia (CENARGEN)	
Exemplares: 	CENARGEN - (22164-1) - UPC - AP - DD -  -  -  - DIS
CNPMS - (12004-1) - UPC - AP - DD -  -  -  - DIS