02120naa a2200313 a 450000100080000000500110000800800410001910000160006024501340007626000090021052011840021965000220140365000230142565000370144865000200148565000220150565000090152765000220153665300170155865300110157565300300158665300220161665300200163865300280165870000230168670000170170970000220172677300580174813698891998-08-20       1991    bl ---       0--  u    #d1 aAMES, R. N.  aCo-selection of compatible rhizobia and vesicular-arbuscular mycorrhizal fungi for cowpea in sterilized and non-sterilized soils.  c1991  aWe selected two isolates of Rhizobium for cowpea (Vigna unguiculata) with sterilized soil tests and two different isolates by non-sterilized soil testing. The four rhizobia were then paired individually with either Glomus pallidum, Glomus aggregatum, or Sclerocystis microcarpa in separate, sterilized, or non-sterilized soil experiments. The purpose of the experiments was to determine the effect of soil sterilization on the selection of effective cowpea rhizobia, and to see whether these rhizobia differed in their effects on cowpea growth when paired with various vesicular-arbuscular mycorrhizal (VAN) fungi. Our experiments showed that rhizobia selected in sterilized soil tests produced few growh responses in the cowpea compared to the other introduced rhizobia, irrespetive of pairing with VAM fungi in sterilized or non-sterilized soi. In contrast, the two rhizobia initially selected by non-sterilized soil, especialy when paired with G. pallidum. Our results suggest that it is important to select for effective rhizobia in non-sterilized soil, and that pairing these rhizobia with specific, coselected VAM fungi can significantly improve the legume growth response.  amycorrhizal fungi  asoil sterilization  avesicular arbuscular mycorrhizae  aEsterilização  aGlomus Aggregatum  aSolo  aVigna Unguiculata  aCo-selection  aCowpea  aEffective cowpea rhizobia  aFungo micorrizico  aGlomus pallidum  aSclerocystis microcarpa1 aTHIAGARAJAN, T. R.1 aAHMAD, M. H.1 aMcLAUGHLIN, W. A.  tBiology and Fertility of Soilgv.12, p.112-116, 1991.