Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2002.669.671In vitro Survival and Nematicidal Activity of Rhizobium, Bradyrhizobium and Sinorhizobium. I. The Influence of Various NaCl Concentrations]]>ShaukatS. ShahidSiddiquiImran A.HamidMaria KhanGhazala HabibAliSyed Azhar6200256During the survey of the cultivated fields in Karachi and neighborhood (Southern Sindh), 3 strains of Rhizobium phaseoli, 1 strain of R. leguminosarum and R. trifolii each, 5 strains of Sinorhizobium meliloti, 2 strains of Bradyrhizobium japonicum and 3 strains of Bradyrhizobium sp. were isolated and identified. The 15 strains of rhizobia tested for their growth under saline media exhibited varying degree of effects to salt concentrations. Most resistant strain was that of S. meliloti MAT1(R9) while least resistant was that of Bradyrhizobium sp. VRM1(R13). All the rhizobial strains caused significant mortality of Meloidogyne incognita, the root-knot nematode juveniles in vitro, though the strains differed markedly in their toxic activity. The rhizobial strains showed significant interaction with NaCl salinity towards M. incognita]]>Chakraborty, U. and R.P. Purkayastha,1984Macrophomina phaseolina infection.]]>30285289Dropkin, V.H., G.C. Martin and R.W. Johnson,19583115126Edongali, E.A., L. Duncan and H. Ferris,1982Meloidogyne incognita on tomato.]]>5111117Ellenby, C. and A.B. Gilbert,1958Heterodera rostochiensis.]]>182925926Everard, C.O.R.,1960Panagrolaimus rigidus (Schneider, 1866), Thorne 1937 and Panagrolaimus salinus (Everard, 1958).]]>35359Jorgensen, F., O. Nybroe and S. Knochel,1994Pseudomonas fluorescens AH9.]]>77340347Lloret, J.,19956137013705Loper, J.E., C. Haack and M.N. Schroth,1985Solanum tuberosum L.).]]>49416422Mascher, F., C. Hase, Y. Moenne-Loccoz and G. Defago,2000Pseudomonas fluorescens CHA0 does not promote strain persistence in soil.]]>6616621667McInnes, K.J., R.W. Weaver and M.J. Savage,19941994pp: 53-58pp: 53-58Miller, K.J. and J.M. Wood,199650101136Roth, W.G., M.P. Leckie and D. Dietzler,1988Escherichia coli by betaine.]]>5431423146Siddiqui, I.A., S. Ehteshamul-Haque, M.J. Zaki and A. Ghaffar,1998Stoechospermum marginatum and Sargassum tenerrimum) and rhizobia in control of root-knot disease and growth of mungbean.]]>16145149Siddiqui, I.A., S. Ehteshamul-Haque, M.J. Zaki and A. Ghaffar,2000531322Siddiqui, I.A. and S. Ehteshamul-Haque,2001Pseudomonas aeruginosa in tomato: The influence of inoculum density, nematode populations, moisture and other plant associated bacteria.]]>2378189Talibart, R.,199417652115217Thomashow, L.S. and D.M. Weller,19961996pp: 187-235pp: 187-235Velasco, R., R. Burgoa, E. Flores, E. Hernandez, A. Villa and S. Vaca,1995Pseudomonas aeruginosa under hyper osmotic shock.]]>37209216Voisard, C., C.T. Bull, C. Keel, J. Laville and M. Maurhofer et al.,1994Pseudomonas Fluorescens CHA0: Current Concepts and Experimental Approaches.]]>1994pp. 67-89pp. 67-89