In this study, a total of five plant-associated Proteus mirabilis were isolated from tomato (Lycopersicon esculentum Mill) plant and screened for plant growth-promoting (PGP) and antagonistic traits. The results revealed that all the isolates showed production of siderophore, and none of the isolates showed positive for hydrogen cyanide and lipase. Further, the antagonistic study of all isolates showed significant mycelial inhibition against Fusarium oxysporum. The isolate BETS2 showed best antagonistic activity against all phytopathogens tested in this study. The sequencing of 16S rRNA gene confirmed that all the isolates belong to the genus Proteus. The in vivo effect of BETS2 was demonstrated through tomato and chilli based bioassay under greenhouse conditions. The bacterial inoculation resulted in a significant increase in plant root, stem and plant biomass. The present study demonstrated that P. mirabilis could act as a plant growth-promoting bacterium.

在这项研究中，共从番茄（番茄植物（Lycopersicon esculentum Mill））中分离出了五个与植物相关的变形杆菌（Proteus mirabilis），并筛选了植物生长促进（PGP）和拮抗特性。结果显示，所有分离株均显示出铁载体的生成，并且所有分离株均未显示出氰化氢和脂肪酶阳性。此外，所有分离物的拮抗研究表明，对尖孢镰刀菌具有明显的菌丝体抑制作用。分离物BETS2对本研究中测试的所有植物病原体表现出最佳的拮抗活性。对16S rRNA基因的测序证实所有分离物都属于变形杆菌属。。在温室条件下通过基于番茄和辣椒的生物测定法证明了BETS2的体内作用。细菌接种导致植物根，茎和植物生物量显着增加。本研究表明，奇异假单胞菌可以充当植物生长细菌。