Data/hora: 19/06/2024 16:03:55

Biblioteca(s): | Embrapa Agrobiologia; Embrapa Arroz e Feijão; Embrapa Clima Temperado.
Data corrente: | 08/09/1993
Data da última atualização: | 18/04/2024
Autoria: | PEREIRA, P. A. A.
Afiliação: | PEDRO ANTONIO ARRAES PEREIRA, CNPAF.
Título: | Improvement of N2 fixation in common bean (Phaseolus vulgaris L.) at different levels of available phosphorus.
Ano de publicação: | 1987
Fonte/Imprenta: | Madison: University of Wisconsin, 1987.
Páginas: | 151 p.
Idioma: | Inglês
Notas: | Tese Doutorado.
Conteúdo: | Phosphorus is one among several factors which affects N2 fixation, and besides N, a principal yield-limiting nutrient in many regions of the world. Since the host plant is an essential partner in symbiosis, knowledge of host genotypic variability for N2 fixation at different levels of P availability will be useful when breeding cultivars for enhanced N2 fixation. The objective of this study was to investigate the possibility of obtaining common bean (Phaseolus vulgaris L.) lines which can fix large amounts of N2 under different levels of available phosphorus. Experiments were conducted in a growth room using a sand-alumina system which was reproducible and well suited for studying N2 fixation under different levels of available P and in the field where a low-Nsoil was chosen. In the growth room studies, P availability strongly affected plant growth and traits related to N2 fixation. However, no beneficial response was detected on the growth of the 14 common bean lines with addition of mycorrhiza. Competition for P between nodules and pods was observed at latter stages of growth, although other factors also contributed to a decline in nitrogenase activity and reduced nodule dry weight during the reproductive stage. Nodules were the plant part richest in phosphorus, and nodule dry weight was affected more than nodule number by limiting P supply, perhaps indicating that growth of the nodules was the primary factor limiting N2 fixation at low P levels. Generally no significant interaction was detected for P levels.....
Palavras-Chave: | FBN; Fixação; Fixacao biologica de nitrogenio; N; NBF; Nitrogen fixing bacteria; Nível; P.
Thesagro: | Adubação; Feijão; Fertilizante; Fósforo; Micorriza; Nitrogênio; Nutriente; Phaseolus Vulgaris.
Thesaurus Nal: | kidney beans; nitrogen; phosphorus.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPAF - (1033-1) - UPC - TS - PP - T 015/87 - PER - 1987.0015 - DIS
CNPAB - (25153-1) - ADD - TS - -- - 635.652 - P436i - 1988.00005 - DIS
CPACT - (2756-1) - ADD - TS - -- - 00941 -  - 1987.00941 - DIS