In this study, Bacillus subtilis 9407 showed a strong antibacterial activity against Acidovorax citrulli in vitro and 61.7% biocontrol efficacy on melon seedlings 4 days post inoculation under greenhouse conditions. To understand the biocontrol mechanism of B. subtilis 9407, identify the primary antibacterial compound and determine its role in controlling bacterial fruit blotch (BFB), a srfAB d...

T he opportunistic pathogen Pseudomonas aeruginosa displays several behaviors when it encounters solid or semisold surfaces. For instance, the bacterial cells form biofilms, swarm, and engage in pili-mediated twitching. Although each of these group behaviors is extensively studied on its own, little is known about the relationships among these behaviors. As P. aeruginosa cells transition from p...

Background: Shewanella species belonging to dissimilatory metal bacteria were found to decolorize most textile dyes and had also attracted great interests in regard to bioremediation. However, studies have rarely been reported on Shewanella xiamenensis BC01, which was isolated as a biodecolorization and bioelectricity strain recently. In this study, the effect of cultivation conditions on S. xi...

Serratia marcescens is a gram-negative bacterium that able to produce many secondary metabolites, such as the prominent red pigment prodigiosin (PG). In this work, ptrA -disrupted mutant strain with reduced PG production was selected from Tn 5 transposon mutants. RT–qPCR results indicated promoted elevated transcription of pig gene cluster in S. FZSF02. Furthermore, we found also controls sever...

The motility and chemotaxis systems are critical for the virulence of leptospires. In this study, the phylogenetic profiles method was used to predict the interaction of chemotaxis proteins. It was shown that CheW1 links to CheA1, CheY, CheB and CheW2; CheW3 links to CheA2, MCP (LA2426), CheB3 and CheD1; and CheW2 links only to CheW1. The similarity analysis demonstrated that CheW2 of Leptospir...

at room temperature (70? to 80?F.) it grows in the form of spreading colonies similar to the ' swarming' Proteus colonies. When incubated at 37?C., the growth is limited to the area of the inoculum. At room temperature the growth continues to spread for three days. If a plate that has been incubated at room temperature and shows a spreading form of growth is subsequently incubated at 37?C., the...

Proteus mirabilis, a human pathogen that frequently causes urinary tract infections, is intrinsically highly resistant to cationic antimicrobial peptides, such as polymyxin B (PB). To explore the mechanisms underlying P. mirabilis resistance to PB, a mutant which displayed increased (> 160-fold) sensitivity to PB was identified by transposon mutagenesis. This mutant was found to have Tn5 insert...