Plant growth promoting (PGP) bacteria enhance plant growth and are a green alternative to chemical fertilizers. In our study, an effective plant growth promoting rhizobacteria (PGPR) strain, KNU17BI1, was isolated from rhizospheric soil of maize, South Korea. The strain was tested in vitro for specific PGP and antifungal traits, such as phosphate solubilization, zinc solubilization, indole acetic acid (IAA) production, ammonia production, nitrogen fixation, 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, siderophore hydrogen cyanide production (HCN) and hydrolytic enzyme activity. Furthermore, in viro antifungal activity was done in a laboratory and in vivo effect of KNU17BI1 on banded leaf and sheath blight intensity as well as plant growth promotion on maize seedling were conducted under greenhouse conditions. The strain was found to be highly effective toward all the parameters except HCN production. The strain KNU17BI1 was identified on the basis of 16S RNA and multilocus sequence analysis (MLSA) and confirmed as Burkholderia contaminans. This study for the first time demonstrated potent in vitro antifungal activity of B. contaminans against Rhizoctonia solani AG-1(IA), Pythium graminicola, Fusarium moniliforme, Alternaria alternata, Alternaria solani, Fusarium graminearum, Stemphylium botryosum Wallr, Colletotrichum dematium, Stemphylium lycopersici and Fusarium oxysporum f.sp. melonis. Furthermore, in this study, for the first time, the potential of B. contaminans stain KNU17BI1 in controlling banded leaf and sheath blight of maize caused by R. solani AG-1(IA) was reported. Therefore, further studies are warranted on the structural identification of actual compounds behind such activities that would be exploited further for biocontrol as well as plant growth promotion.

促进植物生长（PGP）的细菌可促进植物生长，是化学肥料的绿色替代品。在我们的研究中，从韩国玉米的根际土壤中分离出了一种有效的植物生长促进根际细菌（PGPR）菌株KNU17BI1。该菌株在体外测试了特定的PGP和抗真菌特性，例如磷酸盐增溶，锌增溶，吲哚乙酸（IAA）生产，氨生产，固氮，1-氨基环丙烷-1-羧酸酯（ACC）脱氨酶活性，铁载体氢氰化物产量（HCN）和水解酶活性。此外，在实验室和体内进行了体外抗真菌活性在温室条件下，研究了KNU17BI1对带叶和鞘叶枯病强度的影响以及对玉米幼苗的植物生长促进作用。发现该菌株对除HCN产生外的所有参数都非常有效。菌株KNU17BI1是根据16S RNA和多基因座序列分析（MLSA）鉴定的，并确认为Burkholderia contaminans。这项研究首次证明了污染的双歧杆菌对solani solani AG-1（IA），腐霉霉，镰刀镰刀菌，Alternaria alternata，solternaria solani，Fusarium graminearum，Stemphylium botryosum Wallr有较强的体外抗真菌活性。，炭疽病菌，番茄枯萎病菌和尖孢镰刀菌f.sp. 哈密​​瓜 此外，在这项研究中，首次报道了B. contaminans染色剂KNU17BI1在控制solani R. solani AG-1（IA）引起的玉米带叶和枯萎病方面的潜力。因此，有必要对这类活动背后的实际化合物进行结构鉴定，以进一步进行生物防治和促进植物生长。