Abstract:
:A Gram-stain-positive, facultatively anaerobic, endospore-forming bacterium, designated strain TD8T, was isolated from surface-sterilized rice seeds (Oryza sativa L.). Phylogenetic analysis of the 16S rRNA gene indicated that strain TD8T should be placed within the genus Gracilibacillus (95.2-99.0 % sequence similarity); it exhibited highest similarities to Gracilibacillus ureilyticus CGMCC 1.7727T (99.0 %), 'Gracilibacillus xinjiangensis' CGMCC 1.12449T (98.9 %) and Gracilibacillus dipsosauri CGMCC 1.3642T (97.5 %). Chemotaxonomic analysis showed that menaquinone-7 (MK-7) was the major isoprenoid quinone. Diphosphatidylglycerol, phosphatidylglycerol and one unidentified phospholipid were the major cellular polar lipids, and the major fatty acids were anteiso-C15 : 0, anteiso-C17 : 0, iso-C15 : 0, C16 : 0 and iso-C16 : 0, which supported the allocation of the strain to the genus Gracilibacillus. The digital DNA-DNA hybridization value between strain TD8T and Gracilibacillus ureilyticus CGMCC 1.7727T was lower than 70 % (22.60 %), and the average nucleotide identity score was 79.54±5.09 %, suggesting that strain TD8T represented a novel species in the genus Gracilibacillus. The genomic DNA G+C content was 37.5 %. Based on physiological and biochemical characteristics and genotypic data, strain TD8T represents a novel species of the genus Gracilibacillus, for which the name Gracilibacillus oryzae sp. nov. is proposed. The type strain is TD8T (=ACCC 61556T=CICC 24889T=JCM 33537T).
journal_name
Int J Syst Evol Microbiolauthors
He SW,Wang X,Guo HB,Han JG,Thin KK,Gao JS,Ma LA,Zhang XXdoi
10.1099/ijsem.0.004427subject
Has Abstractpub_date
2020-10-01 00:00:00pages
5467-5472issue
10eissn
1466-5026issn
1466-5034journal_volume
70pub_type
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