Characterization of a Versatile Plant Growth-Promoting Rhizobacterium Pseudomonas mediterranea Strain S58

Gu, Yunqing; Wang, Jing; Xia, Zhenyuan; Wei, Hengling

doi:10.3390/microorganisms8030334

Cited by 21 publications

(17 citation statements)

References 46 publications

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“…Members of the genus Sphingomonas suppressed the growth of foliar pathogen Pseudomonas syringae on A. thaliana under laboratory conditions and protected the plant from disease (Bulgarelli et al, 2015). A Pseudomonas mediterranea strain S58 isolated from tobacco rhizosphere proved to be versatile plant growth-promoting agent with multiple beneficial traits for plants, such as solubilizing organic phosphate, producing siderophore, protease, ammonia, and indole-3-acetic acid (Gu et al, 2020).…”

Section: Function Overlap Of Bamboo Leaf and Root Microbiotamentioning

confidence: 99%

Niche Specialization and Functional Overlap of Bamboo Leaf and Root Microbiota

Lin

2020

Front. Microbiol.

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Leaves and roots harbor taxonomically diverse bacterial assemblages which enhance plant growth and performance by increasing nutrient supply and resistance to stress. An extensive investigation of bacterial diversity and composition between leaf and root microbiota of 15 bamboo species differing in rhizome types, lifeforms and sampling sites were conducted by high-through sequencing. The alpha diversity between leaf and root microbiota was not significantly different, whereas, their beta diversity differed remarkably. Niche specialization mainly in species from Actinobacteria was detected which prefer to colonize in roots than leaves. Community structure of leaf microbiota was highly resembled, however, the phylogeny inferred by host's chloroplast data was incongruent with microbiota dendrogram, indicating that phylosymbiosis didn't occur in bamboos and their associated microbiota. Large overlap in functional profiling of leaf and root-associated microbiota was found. Accordingly, we proposed that environmental conditions, structural variation and physiological differences between leaves and roots worked collaboratively for divergence of bamboo microbiota. This study confers to a robust knowledge of bamboo-microbe interaction and provides a list of bacterial lineages for investigation into specific plant-microbe interaction information of which could be used to enhance agricultural and forest productivity.

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Section: Function Overlap Of Bamboo Leaf and Root Microbiotamentioning

confidence: 99%

Niche Specialization and Functional Overlap of Bamboo Leaf and Root Microbiota

Lin

2020

Front. Microbiol.

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“…brassicacearum from coastal halophytic medicinal plant. Moreover, Pseudomonas species are known not only IAA production and ACC-deaminase activity, but also other PGP properties such as; nitrogen fixation, phosphate solubilization and siderophore production and Pseudomonas species have been reported intensively utilized in agricultural applications according to the literature (Gu et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Investigation of ACC-Deaminase and Indole Acetic Acid Producing Bacteria from Rhizospheric Soils in Ağrı Province

Alaylar

Karadayı

2021

Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Plant growth promoting rhizobacteria (PGPR) have critical role in promoting plant growth and health with various mechanisms. Production of indole acetic acid (IAA) and 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity are well-known plant growth promoting (PGP) properties. In the current study; A total of 48 morphologically distinct bacterial colonies were chosen during the isolation of bacteria from various rhizospheric wheat, maize and sainfoin soil samples from agricultural areas in Ağrı-Turkey. The bacteria were isolated from soil samples utilizing by culture-dependent techniques. Then, the strains were visualised for PGP activities such as production acetic acid IAA and ACC deaminase activity. The 16S rRNA sequence similarity of potential PGPR rhizospheric strains demonstrated that strains belong to species Bacillus, Pseudomonas, Microbacterium, Pseudarthrobacter, Arthrobacter and Enterobacter. Totally, 11 of 48 isolates exhibited highly IAA producing and ACC deaminase activity. These results show that IAA producing and ACC deaminase activity of local potential PGPR strains isolated from soil rhizospheric which can appropriate for sustainable agricultural applications in Ağrı province.

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“…Antagonistic tests were performed as described by Gu et al (2020) . For antagonism of pathogenic fungi, a 1 cm diameter agar plug with mycelium was placed in the center of an agar plate, and 10 μL cultures of strains 2P24, 2P24Δ hilA , 2P24Δ invF , and 2P24Δ invE-C were dropped on the plate at four directions, approximately 3 cm from the center.…”

Section: Methodsmentioning

confidence: 99%

Characterization of the SPI-1 Type III Secretion System in Pseudomonas fluorescens 2P24

Wang

Luo

et al. 2021

Front. Microbiol.

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Pseudomonas fluorescens 2P24 is a plant growth-promoting rhizobacterium (PGPR) isolated from wheat take-all decline soil. Genomic analysis of strain 2P24 revealed the presence of a complete SPI-1 type III secretion system (T3SS) gene cluster on the chromosome with an organization and orientation similar to the SPI-1 T3SS gene clusters of Salmonella enterica and P. kilonensis F113. Phylogenetic analysis revealed that the SPI-1 T3SS gene cluster of strain 2P24 might be obtained from Salmonella and Shigella by horizontal gene transfer. Two transcriptional regulator homologs of HilA and InvF were found from the SPI-1 T3SS gene cluster of strain 2P24. HilA regulated the expression of the structural genes positively, such as invG, sipB, sipD, prgI, and prgK. Prediction of transcriptional binding sites and RNA-seq analysis revealed 14 genes were up-regulated by InvF in strain 2P24. Exploring potential roles of SPI-1 T3SS revealed that it was not associated with motility. However, 2P24ΔinvF reduced resistance against Fusarium graminearum significantly. 2P24ΔhilA enhanced formation of biofilm significantly at 48 h. All three mutants 2P24ΔhilA, 2P24ΔinvF, and 2P24ΔinvE-C reduced the chemotactic responses to glucose significantly. Finally, the determination of SPI-1 mutants to trigger innate immunity in Nicotiana benthamiana showed that 2P24ΔinvE-C reduced the ability to induce the production of reactive oxygen species compared with the wild type strain 2P24.

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Characterization of a Versatile Plant Growth-Promoting Rhizobacterium Pseudomonas mediterranea Strain S58

Cited by 21 publications

References 46 publications

Niche Specialization and Functional Overlap of Bamboo Leaf and Root Microbiota

Niche Specialization and Functional Overlap of Bamboo Leaf and Root Microbiota

Investigation of ACC-Deaminase and Indole Acetic Acid Producing Bacteria from Rhizospheric Soils in Ağrı Province

Characterization of the SPI-1 Type III Secretion System in Pseudomonas fluorescens 2P24

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