A novel tumor-targeting strain of exhibits potent biological activities.

are symbionts of soil entomopathogenic nematodes of the genus presenting two distinct forms in their life cycle, and can produce a broad range of bioactive compounds. In this study, a novel strain HN_xs01 was isolated from a soil sample via an entrapment method using nematodes. The supernatants of strain HN_xs01 exhibited antimicrobial properties against Gram-negative and Gram-positive bacteria, and insecticidal properties against larvae, and antitumor properties as well.

[Isolation, identification and characterization of five Pseudomonas strains].

Objective: We isolated Pseudomonas strains from soil samples collected from Changsha, Hunan province, catalogued them and studied the antimicrobial and antitumor activity.

Methods: We isolated Pseudomonas strains from soil samples through Galleria bait method, identified and catalogued the isolated strains according to morphological observation, physiological and biochemical characteristics and the homologous analysis of 16S rRNA sequences of nucleotides. Antimicrobial, antagonistic fungi and anti-tumor activities were studied by diffusion plate assay, dual-culture assay and cytotoxicity test respectively.