International Journal of Soil Science1816-4978xxxx-xxxxAcademic Journals Inc.10.3923/ijss.2012.15.27Pisum sativum and Associated Plant Growth Promoting Rhizobacteria: Effect of Normal and Sewage Irrigation]]>RamtekePramod W. JosephBabu ManiAbin ChackoSonia 1201271The rhizosphere or the zone of influence around roots harbour a multitude of microorganisms that are affected by both abiotic and biotic stresses. This study investigates the impact of sewage irrigation on culturable rhizobacterial communities of Pisum sativum L. The representative PGPR strains of Bacillus, Pseudomonas, Rhizobium and Azotobacter were tested for plant growth promoting activities and heavy metal tolerance pattern. Rhizobacterial strains isolated from sewage-irrigated soil were more tolerant to heavy metals. The test rhizobacterium Pseudomonas putida was both metal tolerant and efficient in producing PGP compounds like indole acetic acid, ammonia, siderophore and catalase, was subjected to seed germination test. Results confirmed that this bacterium had significant impact on stimulation of root and shoot growth. Our findings suggest that P. putida is a strong candidate for development as soil/seed inoculants to enhance crop yields where untreated sewage water is used in irrigation.]]>Ahmad, F., I. Ahmad and M.S. Khan,2008168173181Baath, E.,198947335379Bakker, A.W. and B. Schippers,1987Pseudomonas SPP-mediated plant growth-stimulation.]]>19451457Bashan, Y. and G. Holguin,19983012251228Bric, J.M., R.M. Bostock and S.E. Silverstone,1991in situ assay for indoleacetic acid production by bacteria immobilized on a nitrocellulose membrane.]]>57535538Burd, G.I., D.G. Dixon and B.R. Glick,19986436633668Cappuccino, J.C. and N. Sherman,1992Cervantes, C. and F.Gutierrez-Corana,199414121137Chaudri, A.M., S.P. McGrath, K.E. Giller, E. Rietz and D. Sauerbeck,1993Rhizobium leguminosarum biovar trifolii in soils previously treated with metal-contaminated sewage sludge.]]>25301309Patten, C.L. and B.R. Glick,2002Pseudomonas putida indoleacetic acid in development of the host plant root system.]]>6837953801De Fago, G.B., K. Dulfy and C. Keel,19941994pp: 223237El-Aziz, R., J.S. Angle and R.L. Chaney,1991Rhizobium meliloti isolated from heavy metal contaminated soils.]]>23795798Ellis, R.J., P. Morgan, A.J. Weightman and J.C. Fry,20036932233230Gattumbi, S.M., K.E. Giller and G. Cadisch,200294518526Giller, K.E., S.P. McGrath and P.R. Hirsch,1984Rhizobium.]]>21841848Giller, K.E., E. Witter and S.P. Mcgrath,19983013891414Glick, B.R., D.M. Karaturovic and P.C. Newell,199541533536Graham, M.H. and R.J. Haynes,2006382131Gray, E.J. and D.L. Smith,200537395412Hasnain, S. and A.N. Sabri,1996Triticum aestivum seedlings under Cr-stresses by non rhizospheric pseudomonad strains.]]>1996Kandeler, E., C. Kampichler and O. Horak,199623299306Kloepper, J.W., R. Rodriguez-Kabana, J.W. Zehnder, J. Murphy, E. Sikora and C. Fernandes,1999282126Kloepper, J.W.,19931993pp: 255-274pp: 255-274Kozdroj, J. and J.D. van Elsas,200143197212Leeman, M., F.M. den Ouden, J.A. van Pelt, F.P.M. Dirkx, H. Steiji, P.A.H.M. Bakker and B. Schippers,1996Pseudomonas fluorescens.]]>86149155Loper, J.E. and J.S. Buyer,19914513Lugtenberg, B.J.J., T.F.C. Chin-A-Woeng and G.V. Bloemberg,200281373383Marcelo, E.T., A.A. Luis and H.C. Jorge,19931993Martin-Laurent F., L. Cornet, L. Ranjard, J. Lopez-Gutierrez and L. Philippot et al.,200448425435Muller, A.K., K. Westergaard, S. Christensen and S.J. Serensen,2001361119Nautiyal, C.S.,1999170265270Norris, J.R. and H.M. Chapman,1968Azotobacter.]]>1968Piromyou, P., B. Buranabanyat, P. Tantasawat, P. Tittabutr, N. Boonkerd and N. Teaumroong,2011474454Saleena, L.M., P. Loganathan, S. Rangarajan and S. Nair,2001Bradyrhizobium strains isolated from Arachis hypogaea.]]>47118122Saravanan, V.S., M. Madhaiyan and M. Thangaraju,2007Gluconacetobacter diazotrophicus.]]>6617941798Schwynn, B. and J.B. Neilands,19871694756Sharma, S., M. Aneja, J. Mayer, M. Schloter and J.C. Munch,200549407415Simbert, R.M. and N.R. Krieg,19811981Smit, E., P. Leeflag and K. Wernars,199723249261Vincent, J.M.,1970pp: 1-3pp: 1-3Washington, J.A. II and V.L. Sutter,19801980pp: 453-458pp: 453-458Xie, H., J.J. Pasternak and B.R. Glick,1996Pseudomonas putida GR12-2 that overproduce indoleacetic acid.]]>326771Hazel, J.R. and E.E.Williams,199029167227