Özet:

In this study, the effects of plant growth promoting bacterial (PGPB) strains on some growth parameters of Seyman and Sarıkız bean varieties were investigated. The study was carried out as a petri dish and pot experiment. In the petri experiment, the effect of bacterial applications on the germination of bean seeds was evaluated in a medium containing 1.5% agar. The pot experiment consisted of 6 applications: 3 different bacterial strains (Stenotrophomonas maltophilia strain SY55, Microbacterium esteraromaticum strain SY48 and Rhizobium radiobacter strain SK63) combination of 3 bacterial strains (SY55+SY48+SK63), fertilizer and negative control. It was observed that the interaction of cultivars and applications in vitro was effective on average germination time and germination rate. In vivo, emergence time of bacterial applications (4.83 days), root length (12.94 cm), stem length (35.71 cm), number of nodes (2.67), stem fresh weight (6.86 g) in Seyman variety and root dry weight (0.11 g), emergence time of seeds (5.83 days), root length (16.09 cm), number of leaves (4.17), number of nodes (3.33) in Sarıkız variety was found to increase. It was determined that the most effective bacterial application was Stenotrophomonas maltophilia strain SY55. Some specific properties of strains (catalase, siderophore, ACC deaminase and indole acetic acid production) that play a role in promoting plant growth were determined.