Data/hora: 08/06/2024 06:32:57

Biblioteca(s): | Embrapa Milho e Sorgo; Embrapa Recursos Genéticos e Biotecnologia.
Data corrente: | 11/05/2000
Data da última atualização: | 04/05/2022
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:

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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)

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