01848nam a2200289 a 450000100080000000500110000800800410001910000180006024501390007826000740021730000160029152010090030765000170131665000220133365000140135565000210136965000130139065000140140365000270141765300170144465300130146165300110147465300110148570000270149670000180152370000170154116683852018-08-13       1998    bl uuuu     u00u1 u    #d1 aMARINO, W. T.  aSolubilization of Al- and Fe-phosphates by bacteria isolated from the rhizosphere of Theobroma grandiflorum (Willd. ex Spreng.) Schum.  aIn: SHIFT-WORKSHOP, 3., 1998, Manaus. Proceedings... Bonn: BMBFc1998  ap. 341-349.  aOne 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 (&gt50ug 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.  aagroforestry  amultiple cropping  aBactéria  aCultivo Multiplo  aCupuaçu  aRizosfera  aTheobroma Grandiflorum  aAgrofloresta  aAmazonas  aBrasil  aManaus1 aSILVA JUNIOR, J. P. da1 aMARSCHNER, P.1 aLIEBEREI, R.