sp. nov., sp. nov. and sp. nov., three novel chitin-degrading actinobacteria isolated from a mudflat sediment.

Three strains of actinobacteria, designated as SYSU T00194, SYSU T00242 and SYSU T00266, were isolated from tidal flat sediment samples in Zhanjiang, PR China. The taxonomic position of three isolates was determined using polyphasic taxonomic analysis and phylogenomic analysis. Phylogenetic analysis and 16S rRNA gene sequence comparisons indicated that strain SYSU T00194 formed a distinct clade with IFO 16236 and shared a sequence identity value of 97.

Trujillonella humicola sp. nov., a siderophore-synthesizing bacterium isolated from black soil in Northeast China.

A Gram-stain-positive, motile, and oval-shaped bacterium, designated as SYSU BS000539, was isolated from black soil in Heilongjiang Province, China. 16S rRNA gene sequencing revealed that the isolate shared the highest similarity to Trujillonella endophytica DSM 45413 (98.32%), and phylogenetic analysis confirmed that it belonged to the genus Trujillonella.

Parafrigoribacterium soli sp. nov. and Parafrigoribacterium humi sp. nov., two novel siderophore-synthesizing species isolated from black soil.

Two siderophore-synthesizing species SYSU BS000078 and SYSU BS000231 were isolated from the black soil collected from fields located in Heilongjiang province, China. The results of phylogenetic analysis based on the 16S rRNA gene sequences indicated that these two strains showed the highest sequence similarity to Parafrigoribacterium mesophilum KCTC 19311 (98.61 % and 98.

Aquibaculum sediminis sp. nov., a halotolerant bacteria isolated from salt lake sediment.

An aerobic, Gram-stain negative bacterium was isolated from sediment samples of Barkol salt lake in Hami City, Xinjiang Uygur Autonomous Region, China, with the number EGI_FJ10229. The strain is ellipse-shaped, oxidase-negative, catalase-positive, and has white, round, smooth, opaque colonies on marine 2216 E agar plate. Growth occurs at 4.

Rufibacter psychrotolerans sp. nov., a Cold-Tolerating Novel Species Isolated from Desert Soil.

Strain SYSU D00308, a short-rod-shaped bacterium, was isolated from a sandy soil collected from the Gurbantunggut Desert, Xinjiang, PR China. Strain SYSU D00308 was Gram-stain-negative, aerobic, pink-pigmented, non-motile, catalase- and oxidase-positive. The strain grew at 4-37 ℃, pH 5.

Pedobacter deserti sp. nov., a novel species isolated from desert soil.

An aerobic, Gram-stain-negative bacterium, designated as SYSU D00382, was sourced from soil of Gurbantunggut Desert, PR China. The strain was short-rod-shaped, oxidase-positive and catalase-negative, with yellow-colored, convex, round, and smooth colonies on TSA plate. Growth and proliferation occurred at 4-37 °C (optimal: 28-30 °C), pH 5.

Methylobacterium nigriterrae sp. nov., isolated from black soil.

An aerobic, Gram-stain-negative, motile rod bacterium, designated as SYSU BS000021, was isolated from a black soil sample in Harbin, Heilongjiang province, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate belongs to the genus Methylobacterium, and showed the highest sequence similarity to Methylobacterium segetis KCTC 62267 (98.51%) and Methylobacterium oxalidis DSM 24028 (97.

sp. nov., a slightly halophilic bacterium isolated from an enrichment system with saline lake sediment.

A Gram-stain-negative, non-motile, and slightly halophilic alphaproteobacterium, designated strain EGI FJ00035, was isolated from enrichment sediment samples of a saline lake in Xinjiang Uygur Autonomous Region, PR China. The taxonomic position of the isolate was determined using the polyphasic taxonomic and phylogenomic analyses. Phylogenetic analysis based on the 16S rRNA gene sequences indicated that strain EGI FJ00035 formed a distinct clade with '' UJN715 and '' lm93 with sequence similarities of 98.

Aridity drives the variability of desert soil microbiomes across north-western China.

Dryland covers >35 % of the terrestrial surface and the global extent of dryland increases due to the forecasted increase in aridity driven by climate change. Due to the climate change-driven aridity ecosystems, deserts provide one of the most hostile environments for microbial life and survival. Therefore, a detailed study was carried out to explore the deserts with different aridity levels (exposed to severe climate change) influence on microbial (bacteria, fungi, and protist) diversity patterns, assembly processes, and co-occurrence.

Isoptericola croceus sp. nov., a novel actinobacterium isolated from saline-alkali soil.

A novel actinomycete, designated strain q2, was isolated from the saline-alkaline soil, collected from Daqing, Heilongjiang province, China. The results of phylogenetic analysis based on the 16S rRNA gene sequences indicated that strain q2 belongs to the genus Isoptericola, and showed the highest sequence similarity to Isoptericola halotolerans KCTC 19046 (98.48%) and Isoptericola chiayiensis KCTC 19740 (98.

sp. nov., a novel bacterium isolated from Pearl River Estuary.

A Gram-staining-positive, aerobic, motile, and rod-shaped strain, designated SYSU M60031, was isolated from a Pearl River Estuary sediment sample, Guangzhou, Guangdong, China. The isolate could grow at pH 5.0-8.

sp. nov., a thermophilic bacterium isolated from a hot spring sediment.

A novel anaerobic bacterium, designated SYSU GA19001, was isolated from a hot spring sediment sample. Phylogenetic analysis indicated that the isolate belongs to the genus , and showed the highest sequence similarity to CICC 10730 (96.63 %) and PYR-10 (96.