Title:	Solubilization of Al- and Fe-phosphates by bacteria isolated from the rhizosphere of Theobroma grandiflorum (Willd. ex Spreng.) Schum.
Authors:	MARINO, W. T. SILVA JUNIOR, J. P. da MARSCHNER, P. LIEBEREI, R.
Affiliation:	University of Hamburg JOSE PEREIRA DA SILVA JUNIOR, CPAA.
Date Issued:	1998
Citation:	In: SHIFT-WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBF, 1998.
Pages:	p. 341-349.
Description:	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
Keywords:	Agrofloresta Brasil Amazonas Manaus
Type of Material:	Artigo em anais e proceedings
Access:	openAccess
Appears in Collections:	Artigo em anais de congresso (CPAA)