Complete Genome Sequence of Sphingobacterium psychroaquaticum Strain SJ-25, an Aerobic Bacterium Capable of Suppressing Fungal Pathogens

• Published in: Current microbiology Vol. 77; no. 1; pp. 115 - 122
• Main Authors: Xu, Lian, Zhang, Hui, Xing, Ya-Ting, Li, Ning, Wang, Shuai, Sun, Ji-Quan
• Format: Journal Article
• Language: English
• Published: New York Springer US 2020; Springer Nature B.V
• Subjects: Agricultural land; Bacteria; Biomedical and Life Sciences; Biosynthesis; Biotechnology; Butanediol; Chitinase; Chromosomes; Disease control; Fungi; Fusarium graminearum; Genes; Genomes; Genomic analysis; Host plants; Life Sciences; Microbiology; Nucleotide sequence; Operons; Pathogens; Phylogeny; Plant diseases; rRNA; Salicylic acid; Soil analysis; Sphingobacterium; tRNA
• ISSN: 0343-8651; 1432-0991
• DOI: 10.1007/s00284-019-01789-3

Using antagonistic bacterium is an effective method to control plant disease by fungal pathogens. An aerobic bacterium designated SJ-25, capable of suppressing Fusarium graminearum , Exserohilum turcicum , Pythium aphanidermatum , and Cochliobolus sativus , was isolated from farmland soil. The phylogenetic analysis revealed that strain SJ-25 belongs to the species of Sphingobacterium psychroaquaticum . The genome of strain SJ-25 consists of a 4,396,535-bp chromosome with a G+C content of 41.7 mol%; including 3696 CDS, 64 tRNA genes and six rRNA operons. Genomic analysis revealed that its genome contains multiple genes responsible for biosynthesis of siderophore, methyl 4-hydroxybenzoate, chitinase, giving strain SJ-25 the antagonistic ability on fungi pathogen. Strain SJ-25 harbors sets genes responsible for production of 2, 3-butanediol and salicylic acid, which could elicit the induced systemic resistance of the host plant. This genome sequence could be used as a basis material for further exploration of antagonistic mechanisms on fungi, widening our understanding of the ecological role of the genus Sphingobacterium in farmland ecosystem.