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Methylobacillus rhizosphaerae sp. nov., a novel plant-associated methylotrophic bacterium isolated from rhizosphere of red pepper |
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| Authors: | M Madhaiyan S Poonguzhali M Senthilkumar D Pragatheswari K-C Lee J-S Lee |
| Institution: | 1. Department of Agricultural Microbiology, Tamilnadu Agricultural University, Coimbatore, 641 003, Tamilnadu, India 2. Temasek Lifesciences Laboratory, 1 Research Link, National University of Singapore, Singapore, 117604, Singapore 3. School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand 4. Korean Collection for Type Cultures, Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 305-806, Republic of Korea |
| Abstract: | A novel plant-associated obligate methylotrophic bacterium, designated strain Ca-68T, was isolated from the rhizosphere soil of field-grown red pepper from India. The isolates are strictly aerobic, Gram negative, motile rods multiplying by binary fission and formaldehyde is assimilated via the ribulose monophosphate pathway. A comparative 16S rRNA gene sequence-based phylogenetic analysis placed the strain in a clade with the species Methylobacillus flagellatus, Methylobacillus glycogens and Methylobacillus pratensis, with which it showed pairwise similarity of 97.8, 97.4 and 96.2 %, respectively. The major fatty acids are C16:0, C10:0 3OH and C16:1 ω7c. The G+C content of the genomic DNA is 59.7 mol%. The major ubiquinone is Q-8. Dominant phospholipids are phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. Based on 16S rRNA gene sequence analysis and DNA–DNA relatedness (14–19 %) with type strains of the genus Methylobacillus, the novel isolate was classified as a new species of this genus and named Methylobacillus rhizosphaerae Ca-68T (=KCTC 22383T = NCIMB 14472T). |
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