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Your search keyword '"Zhang, Yu‐qin"' showing total 15 results
Start Over Author "Zhang, Yu‐qin" Journal frontiers in microbiology
15 results on '"Zhang, Yu‐qin"'

7. Geminicoccus flavidas sp. nov. and Geminicoccus harenae sp. nov., two IAA-producing novel rare bacterial species inhabiting desert biological soil crusts

Author

Jiang, Zhu-Ming, Deng, Yang, Han, Xue-Fei, Su, Jing, Wang, Hao, Yu, Li-Yan, and Zhang, Yu-Qin

Subjects
Microbiology (medical), Microbiology
Abstract

Two Gram-staining negative strains (CPCC 101082T and CPCC 101083T) were isolated from biological sandy soil crusts samples collected from Badain Jaran desert, China. Both isolates were heterotrophic phototroph, could produce indole-3-acetic acid. The 16S rRNA gene sequences of these two strains were closely related to the members of the family Geminicoccaceae, showing high similarities with Geminicoccus roseus DSM 18922T (96.9%) and Arboricoccus pini B29T1T (90.1%), respectively. In phylogenetic tree based on 16S rRNA gene sequences, strain CPCC 101082T and CPCC 101083T formed a robust distinct clade with Geminicoccus roseus DSM 18922T within the family Geminicoccaceae, which indicated that these two isolates could be classified into the genus Geminicoccus. The growth of strain CPCC 101082T occurred at 15–42°C and pH 4.0–10.0 (optima at 28–37°C and pH 6.0–8.0). The growth of strain CPCC 101083T occurred at 4–45°C and pH 4.0–10.0 (optima at 25–30°C and pH 6.0–8.0). The major cellular fatty acids of CPCC 101082T and CPCC 101083T contained C18:1ω7c/C18:1ω6c, cyclo-C19:0ω8c, and C16:0. Q-10 was detected as the sole respiratory quinone. Diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, an unidentified phospholipid and an unidentified aminolipid were tested in the polar lipids profile. The genomes of the two isolates were characterized as about 5.9 Mbp in size with the G + C content of nearly 68%. The IAA-producing encoding genes were predicated in both genomes. The values of average nucleotide identity were 80.6, 81.2 and 92.4% based on a pairwise comparison of the genomes of strains CPCC 101082T and CPCC 101083T and Geminicoccus roseus DSM 18922T, respectively. On the basis of the genotypic, chemotaxonomic and phenotypic characteristics, the strains CPCC 101082T (=NBRC 113513T = KCTC 62853T) and CPCC 101083T (=NBRC 113514T = KCTC 62854T) are proposed to represent two novel species of the genus Geminicoccus with the names Geminicoccus flavidas sp. nov. and Geminicoccus harenae sp. nov.

Published
2022

15. Environmental distribution and genomic characteristics of Solirubrobacter , with proposal of two novel species.

Author

Jiang ZM, Mou T, Sun Y, Su J, Yu LY, and Zhang YQ

Abstract

Solirubrobacter spp. were abundant in soil samples collected from deserts and other areas with high UV radiation. In addition, a novel Solirubrobacter species, with strain CPCC 204708 T as the type, was isolated and identified from sandy soil sample collected from the Badain Jaran Desert of the Inner Mongolia autonomous region. Strain CPCC 204708 T was Gram-stain positive, rod-shaped, non-motile, non-spore-forming, and grew optimally at 28-30°C, pH 7.0-8.0, and in the absence of NaCl. Analysis of the 16S rRNA gene sequence of strain CPCC 204708 T showed its identity within the genus Solirubrobacter , with highest nucleotide similarities (97.4-98.2%) to other named Solirubrobacter species. Phylogenetic and genomic analyses indicated that the strain was most closely related to Solirubrobacter phytolaccae KCTC 29190 T , while represented a distinct species, as confirmed from physiological properties and comparison. The name Solirubrobacter deserti sp. nov. was consequently proposed, with CPCC 204708 T (= DSM 105495 T = NBRC 112942 T ) as the type strain. Genomic analyses of the Solirubrobacter spp. also suggested that Solirubrobacter sp. URHD0082 represents a novel species, for which the name Candidatus "Solirubrobacter pratensis" sp. nov. was proposed. Genomic analysis of CPCC 204708 T revealed the presence of genes related to its adaptation to the harsh environments of deserts and may also harbor genes functional in plant-microbe interactions. Pan-genomic analysis of available Solirubrobacter spp. confirmed the presence of many of the above genes as core components of Solirubrobacter genomes and suggests they may possess beneficial potential for their associate plant and may be important resources for bioactive compounds., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2023 Jiang, Mou, Sun, Su, Yu and Zhang.)

Published
2023
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