Acuticoccus kandeliae sp. nov., isolated from rhizosphere soil of the mangrove plant Kandelia, and emended description of Acuticoccus yangtzensis

International Journal of Systematic and Evolutionary Microbiology
Qi YinYing Xu

Abstract

A novel bacterial strain, J103T, was isolated from rhizosphere soil of the mangrove plant Kandelia in Mai Po Inner Deep Bay Ramsar Site, Hong Kong. The strain was aerobic, Gram-stain-negative, oval-shaped with folds in the middle, non-motile and non-spore-forming. It grew at temperatures of 20-30 °C (optimum, 25-30 °C), at pH 6.0-9.0 (optimum pH 6.0) and at NaCl concentrations of 0.5-5.0 % (w/v) (optimum 1.0-2.0 %). Strain J103T was able to reduce nitrate to nitrite, and hydrolyse urea, Tween 40 and Tween 60. The major polar lipids were aminolipid, glycolipid, phosphatidylcholine and phosphatidylglycerol. The major fatty acids were C18 : 1ω7c and C19 : 0 cyclo ω8c. The respiratory quinone was Q-10. The DNA G+C content was 68.5 mol%. Sequence analysis of the 16S rRNA gene indicated that strain J103T belongs to the genus Acuticoccus, within the family Rhodobacteraceae. The closest phylogenetic neighbour was Acuticoccus yangtzensis JL1095T, showing 96.2 % 16S rRNA gene sequence similarity. The genome size of strain J103T was 6 478 100 bp. The average nucleotide identity and digital DNA-DNA hybridization values between strain J103T and Acuticoccus yangtzensis JL1095T were 75.44 and 16.43 %, respectively. Characterization based on p...Continue Reading

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Citations

Feb 28, 2019·International Journal of Systematic and Evolutionary Microbiology·Qiliang LaiZongze Shao
Dec 8, 2021·International Journal of Systematic and Evolutionary Microbiology·Zhe LiXinli Pan

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