Fig. 1

Colony morphology with brown color on LB agar plate supplemented with 0.5 mM AgNO3 (A), and the phylogenetic tree was constructed using 16S rDNA sequencing of Neobacillus niacini SH2 denoted by the arrow and aligned with other related sequences obtained from GenBank (B). This strain exhibited 98.66%–98.82% identity and 99%–100% coverage with various strains of N. niacini, involving the type material N. niacin NBRC15566 (GenBank accession no. NR_133777). The phylogenetic tree also included E. coli as an outgroup strain, denoted as E. for Escherichia and N. for Neobacillus (B)