Título:	Solubilization of Al- and Fe-phosphates by bacteria isolated from the rhizosphere of Theobroma grandiflorum (Willd. ex Spreng.) Schum.
Autoria:	MARINO, W. T. SILVA JUNIOR, J. P. da MARSCHNER, P. LIEBEREI, R.
Afiliação:	University of Hamburg JOSE PEREIRA DA SILVA JUNIOR, CPAA.
Ano de publicação:	1998
Referência:	In: SHIFT-WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBF, 1998.
Páginas:	p. 341-349.
Conteúdo:	One hyndred sixty-eight bacterial isolates from the rhizoplane and rhizosphere (2mm-10mm away from the root surface) of cupuacu were isolated in spring 1997 in an experimental polyculture site (SHIFT ENV-23) near Manaus and their capacity to grow on media with poorly soluble AlPO4 was determined. 75% of the isolated bacteria were found to be effective in solubilizing hardly-soluble AlPO4 and FePO4. Two strains were selected because of their ability to solubilize high amounts (>50ug P/ml) of AlPO4 and FePO4 in former experiments. Their capacity to solubilize inorganic phosphates was investigated in liquid culture. Both strains solubilized similar amounts of P. The amount of P solubilization was highest after three days of growth while cell numbers were maximal after 13 days. During the solubilization process one strain show a decrease in pH while the other strain increased the pH. This incates that the solubilization of inorganic phosphates is not necessarily related to the acidification.
Thesagro:	Bactéria Cupuaçu Cultivo Multiplo Rizosfera Theobroma Grandiflorum
NAL Thesaurus:	agroforestry multiple cropping
Palavras-chave:	Agrofloresta Brasil Amazonas Manaus
Tipo do material:	Artigo em anais e proceedings
Acesso:	openAccess
Aparece nas coleções:	Artigo em anais de congresso (CPAA)