Bacillus methylotrophicus sp. nov., a methanol-utilizing, plant-growth-promoting bacterium isolated from rice rhizosphere soil.
A Gram-positive bacterium, designated strain CBMB205(T), was isolated from the rhizosphere soil of traditionally cultivated, field-grown rice. Cells were strictly aerobic, motile, rod-shaped and formed endospores. The best growth was achieved at 30°C and pH 7.0 in ammonium mineral salts (AMS) medium containing 600 mM methanol. A comparative 16S rRNA gene sequence-based phylogenetic analysis placed strain CBMB205(T) in a clade with the species Bacillus amyloliquefaciens, Bacillus vallismortis, Bacillus subtilis, Bacillus atrophaeus, Bacillus mojavensis and Bacillus licheniformis and revealed pairwise similarities ranging from 98.2 to 99.2 %. DNA-DNA hybridization experiments revealed a low level (<36 %) of DNA-DNA relatedness between strain CBMB205(T) and its closest relatives. The major components of the fatty acid profile were C₁₅:₀ anteiso, C₁₅:₀ iso, C₁₆:₀ iso and C₁₇:₀ anteiso. The diagnostic diamino acid of the cell wall was meso-diaminopimelic acid. The G+C content of the genomic DNA was 45.0 mol%. The lipids present in strain CBMB205(T) were diphosphatidylglycerol, phosphatidylglycerol, a minor amount of phosphatidylcholine and two unknown phospholipids. The predominant respiratory quinone was MK-7. Studies of DNA-DNA relatedness, morphological, physiological and chemotaxonomic analyses and phylogenetic data based on 16S rRNA gene sequencing enabled strain CBMB205(T) to be described as representing a novel species of the genus Bacillus, for which the name Bacillus methylotrophicus sp. nov. is proposed. The type strain is CBMB205(T) (=KACC 13105(T)=NCCB 100236(T)).
Madhaiyan
Munusamy
M
Biomaterials and Biocatalysts, Temasek Life Sciences Laboratory, The National University of Singapore, Singapore 117604.|Department of Agricultural Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea.
Poonguzhali
Selvaraj
S
Department of Agricultural Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea.
Kwon
Soon-Wo
SW
Korean Agricultural Culture Collection (KACC), Microbial Genetics Division, National Institute of Agricultural Biotechnology, RDA, Suwon 441-707, Republic of Korea.
Sa
Tong-Min
TM
Department of Agricultural Chemistry, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea.
D000332:Aerobiosis; D001412:Bacillus subtilis / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D015373:Bacterial Typing Techniques; D001482:Base Composition; D050260:Carbohydrate Metabolism; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008124:Locomotion; D000432:Methanol / Q000378:metabolism*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D012275:Oryza / Q000254:growth & development* / Q000382:microbiology; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D058441:Rhizosphere; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology; D013171:Spores, Bacterial / Q000166:cytology; D013696:Temperature
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010743:Phospholipids; D012336:RNA, Ribosomal, 16S; D000432:Methanol