Temporal shifts in the phosphate mobilising bacterial community reveal contrasting succession patterns in response to different phosphorus sources.

Background: Phosphate mobilising bacteria (PMB), such as phoD- and pqqC-harbouring bacteria, play a crucial role in mobilising insoluble phosphorus (P) in soil through the secretion of alkaline phosphatase and organic acids.

Objectives: To evaluate the succession pattern of PMB communities in response to different insoluble P sources.

Methods: Five P source treatments, including the addition of KHPO (PDP), FePO (FEP), Ca(PO) (TCP), lecithin (LEC), and a negative control, were established in the soil in a microcosmic system.

A Novel Strain GS2Y Exhibits Strong Biocontrol Potential Against Fungal Diseases in Tea Plants ().

Background: Tea plants () are widely cultivated cash crops. However, fungal diseases lead to significant reductions in both the yield and quality of tea. Therefore, searching for economical, eco-friendly, and efficient biological control measures is crucial for protecting tea plants from pathogenic fungi.

Lipids Mediate Arbuscule Development and Senescence in Tomato Roots Colonized by Arbuscular Mycorrhizae Fungus under Drought Stress.

Arbuscular mycorrhizae (AM) symbiosis can enhance plant resistance to drought stress (DS). This study aimed to investigate the DS effects on lipids at different stages of symbiosis and to link lipid profiles to arbuscule dynamics in tomato roots colonized by AM fungi. DS increased mycorrhizal colonization and arbuscule abundance at an early stage but decreased them at a later stage, delayed arbuscule development, and accelerated arbuscule senescence at a later stage.

Tomato plant growth promotion and drought tolerance conferred by three arbuscular mycorrhizal fungi is mediated by lipid metabolism.

Arbuscular mycorrhizal fungi (AMF) can promote plant growth and enhance plant drought tolerance with varying effect size among different fungal species. However, the linkage between the variation and the lipid metabolism, which is exclusively derived from plants, has been little explored thus far. Here, we established AM symbiosis between tomato (Solanum lycopersicum) plants and three AMF species (Rhizophagus intraradices, Funneliformis mosseae, Rhizophagus irregularis) under well watered (WW) or drought stressed (DS) conditions in pot experiment.

sp. nov., sp. nov. and sp. nov., isolated from citrus phyllosphere.

Three novel Gram-stain-positive, aerobic and rod-shaped bacterial strains, designated RHCKG28, RHCJP20 and RHCKG23, were isolated from phyllosphere of healthy citrus leaves collected from Renhua County in Guangdong Province, PR China. 16S rRNA gene sequences comparison and phylogenetic analyses showed that they all belonged to the genus , among which strain RHCKG28 showed the highest similarity to NBRC 103064 (99.3 %), while strains RHCJP20 and RHCKG23 showed 99.

Description of Xanthocytophaga agilis sp. nov. and Xanthocytophaga flavus sp. nov. of the new genus Xanthocytophaga gen. nov and the proposal of Rhodocytophagaceae fam. nov. within the order Cytophagales.

Four Gram-staining-negative, aerobic, yellow-pigmented and rod-shaped bacteria, named strains BD1B2-1, NT2B1, YF14B1 and DM2B3-1, were isolated from four rhizosphere soil samples of banana in China. Comparison of the 16S rRNA gene sequences showed that all these strains were most closely related to an invalidly published species, 'Rhodocytophaga rosea' 172606-1, with similarities ranging from 87.7 to 88.

sp. nov. sp. nov. sp. nov. and sp. nov., isolated from subtropical forest soil.

Four novel bacterial strains, designated RBB1W86, RXD159, RBB189 and RLT163, were isolated from subtropical forest soil of the Nanling National Nature Reserve located in Guangdong Province, PR China. 16S rRNA gene phylogeny indicated their affiliation to the genus , among which strains RBB1W86 and RXD159 were closely related to CGMCC 1.15435 with 16S rRNA gene sequence similarities of 98.

Characterization of phytopathogen-preying Hyalangium versicolor sp. nov., and proposal for the reclassification of Cystobacter gracilis as Hyalangium gracile comb. Nov.

A Gram-staining-negative, aerobic, and rod-shaped with tapered end myxobacterium, designed as strain H56D21, was isolated from forest soil sampled from the Diaoluo Mountain National Nature Reserve located in Hainan Province, PR China. It showed prey ability on two kinds of phytopathogens including both fungi (Fusarium solani, Fusarium graminearum, and Fusarium oxysporum) and bacteria (Ralstonia solanacearum and Xanthomonas campestris). Phylogenetic analyses based on the 16S rRNA gene and core genes  sequences revealed that strain H56D21 belonged to the genus Hyalangium and was most closely related to Cystobacter gracilis DSM 14753 and Hyalangium minutum DSM 14724.

Cooperation of arbuscular mycorrhizal fungi and bacteria to facilitate the host plant growth dependent on soil pH.

Almost all plants grow well in their native soils. We hypothesized that soil microbes promote the growth of their hosts in native soils by the example of soil pH. Here, bahiagrass ( Flugge) indigenous to subtropical soils was grown in the native soil (the original pH = 4.

Pseudomonas citri sp. nov., a potential novel plant growth promoting bacterium isolated from rhizosphere soil of citrus.

A novel potential plant growth promoting bacterium, designated OPS13-3, was isolated from rhizosphere soil of citrus in Aotou Town of Guangzhou, Guangdong Province, PR China. It showed high ability to dissolve insoluble inorganic phosphate and organic phosphorus and to produce 3-indoleacetic acid (IAA) and siderophore. Cells of the novel strain were Gram-stain-negative, rod-shaped, aerobic and motile with polar flagellum.

Genome-based taxonomic classification of the closest-to-Comamonadaceae group supports a new family Sphaerotilaceae fam. nov. and taxonomic revisions.

Many genera closest to the family Comamonadaceae have not been classified into any family; moreover, some of them are not monophyletic groups beyond the genus level. To resolve the taxonomic uncertainty of the closest-to-Comamonadaceae (CTC) group, we performed 16S rRNA gene- and genome-based phylogenetic analyses combined with genome relatedness indices and phenotypic traits comparison. Phylogenies based on the 16S rRNA gene and genome sequences demonstrated that the CTC group formed a coherent and robust monophyletic lineage and was sister to the family Comamonadaceae, thereby proposing the CTC group as a novel family, Sphaerotilaceae fam.

Aureoterrolides B‒M: Eremophilane-type sesquiterpenoids isolated from Aspergillus aureoterreus and their cytotoxicity.

Uncovered by genome sequence analyses, twelve undescribed sesquiterpenoids designated aureoterrolides B‒M, were isolated from the culture broth of the fungus Aspergillus aureoterreus together with two known analogues. They are unusual eremophilanes with an oxidized C-4, of which aureoterrolide J is an unreported furanoeremophilane comprising a 3/6/6/5/3 pentacyclic architecture with a rare 3,6-spiro ring system. Their structures and absolute configurations were unambiguously assigned by extensive spectroscopic method and theoretical ECD calculation.

Microvirga terricola sp. nov. and Microvirga solisilvae sp. nov, isolated from forest soil.

Two Gram-staining-negative, aerobic and rod-shaped strains, designated c23x22 and sex2, were isolated from forest soil collected from Chebaling National Nature Reserve in Guangdong Province and Limu Mountain National Forest Park in Hainan Province, P. R. China, respectively.

Corallococcus silvisoli sp. nov., a novel myxobacterium isolated from subtropical forest soil.

An orange-pigmented myxobacterium, designated strain c25j21, was isolated from subtropical forest soil collected from the Chebaling National Nature Reserve in Guangdong Province, China. Phylogenetic analysis based on the 16S rRNA gene and core genes clearly showed that the novel strain was affiliated within the genus Corallococcus and most closely related to Corallococcus aberystwythensis DSM 108846 (99.3% 16S rRNA gene sequence similarity), while C.

sp. nov., isolated from rhizosphere soil of banana.

A Gram-stain-negative, aerobic and rod-shaped bacterium, designated as strain B61, was isolated from rhizosphere soil of banana collected from Dongguan, Guangdong Province, PR China. Growth occurred at 15-40 °C, within a pH range of pH 6.0-9.

sp. nov. and sp. nov., two novel species isolated from forest soil.

Three aerobic, Gram-stain-negative, non-motile and rod-shaped bacteria, designated strains RXD178, RXD172-2 and RLT1W51, were isolated from two forest soil samples of Nanling National Nature Reserve in Guangdong Province, PR China. Phylogenetic analyses based on 16S rRNA gene sequences and 92 core genes showed that they belonged to the genus , and were most closely related to four validly published species with similarities ranging from 99.4 to 98.

Culture-dependent and -independent methods revealed an abundant myxobacterial community shaped by other bacteria and pH in Dinghushan acidic soils.

Myxobacteria are one of the most promising secondary metabolites producers. However, they are difficult to isolate and cultivate. To obtain more myxobacteria and know the effects of environmental factors on myxobacterial community, we characterized myxobacterial communities in Dinghushan acidic forest soils of pH 3.

sp. nov. and sp. nov., isolated from abandoned lead-zinc mine.

Two novel strains, designated 92R-1 and 9PBR-1, were isolated from abandoned lead-zinc ore collected in Meizhou, Guangdong Province, PR China. Phylogenetic analyses based on 16S rRNA gene sequences showed that they fell into the genus of r and formed two distinct lineages. Strain 92R-1 was most closely related to JCM 19491 (98.

sp. nov., isolated from forest soil.

A novel bacterial strain, designated ysch24, was isolated from a forest soil sample collected from the Cat Tien National Park, southern Vietnam. Cells were Gram-stain-negative, aerobic, gliding, filamentous or rod-shaped. The results of 16S rRNA gene analyses revealed that strain ysch24 belongs to the genus , and was most closely related to GDMCC 1.

sp. nov., isolated from subtropical forest soil.

A novel bacterial strain, designated FGD1, was isolated from subtropical forest soil of the Nanling National Forest Park located in Guangdong Province, P.R. China.

sp. nov., isolated from tungsten mine tailing.

A novel pink-pigmented strain, designated 6HR-1, was isolated from tungsten mine tailings in Jiangxi Province, PR China. Cells were Gram-stain-negative, aerobic, non-spore-forming, rod-shaped and motile with a polar flagellum (monotrichous). It could not utilize methanol, methylamine, formaldehyde or formate as a sole carbon source.

Transfer of , , and corrig. into the novel genus gen. nov. and into the novel genus gen. nov. within the family .

During a phylogenetic analysis of and its closely related genera in the family , we found that the genus and the species might not be properly assigned in the taxonomy. Phylogenetic, phenotypic and chemotaxonomic characterizations clearly showed that the genus should be reclassified into two genera (Clade I and Clade II), for which the original genus name, , is proposed to be retained only for Clade I, and a new genus named as gen. nov.

and Lee and Jeon 2017 are two later heterotypic synonyms of Chen . 2013 and emended description of the species.

Phylogenetic analysis of the genus had shown that the type strains of , and shared a very close relationship between each other. The 16S rRNA gene sequences similarity values between each other ranged from 99.65 to 99.