Bacterial exopolysaccharide promotes acid tolerance in Bacillus amyloliquefaciens and improves soil aggregation

Deka, P. C.; Goswami, Gunajit; Das, Pompi; Gautom, Trishnamoni; Chowdhury, Naimisha; Boro, Robin Chandra; Barooah, Madhumita

doi:10.1007/s11033-018-4566-0

Cited by 34 publications

(15 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mutation in sacB gene (encoding levansucrase for synthesis of levan) of P. polymyxa impaired its ability to cause soil aggregation, thus implicating the role of levan produced by P. polymyxa in the aggregation of root-adhering soil in wheat. EPS producing Bacillus amyloliquefaciens p16 improved soil aggregation and soil water retention (Deka et al, 2018). Inoculation of EPS producing Pantoea agglomerans strain NAS206 in wheat increased aggregation and stabilization of rootadhering soil, as indicated by significant increase in aggregate mean weight diameter, aggregate macro-porosity, RAS/RT ratio, and water stable aggregates (Amellal et al, 1998).…”

Section: Pgpr and Soil Structurementioning

confidence: 97%

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Grover

Bodhankar

Sharma

et al. 2021

Front. Sustain. Food Syst.

145

View full text Add to dashboard Cite

The above ground growth of the plant is highly dependent on the belowground root system. Rhizosphere is the zone of continuous interplay between plant roots and soil microbial communities. Plants, through root exudates, attract rhizosphere microorganisms to colonize the root surface and internal tissues. Many of these microorganisms known as plant growth promoting rhizobacteria (PGPR) improve plant growth through several direct and indirect mechanisms including biological nitrogen fixation, nutrient solubilization, and disease-control. Many PGPR, by producing phytohormones, volatile organic compounds, and secondary metabolites play important role in influencing the root architecture and growth, resulting in increased surface area for nutrient exchange and other rhizosphere effects. PGPR also improve resource use efficiency of the root system by improving the root system functioning at physiological levels. PGPR mediated root trait alterations can contribute to agroecosystem through improving crop stand, resource use efficiency, stress tolerance, soil structure etc. Thus, PGPR capable of modulating root traits can play important role in agricultural sustainability and root traits can be used as a primary criterion for the selection of potential PGPR strains. Available PGPR studies emphasize root morphological and physiological traits to assess the effect of PGPR. However, these traits can be influenced by various external factors and may give varying results. Therefore, it is important to understand the pathways and genes involved in plant root traits and the microbial signals/metabolites that can intercept and/or intersect these pathways for modulating root traits. The use of advanced tools and technologies can help to decipher the mechanisms involved in PGPR mediated determinants affecting the root traits. Further identification of PGPR based determinants/signaling molecules capable of regulating root trait genes and pathways can open up new avenues in PGPR research. The present review updates recent knowledge on the PGPR influence on root architecture and root functional traits and its benefits to the agro-ecosystem. Efforts have been made to understand the bacterial signals/determinants that can play regulatory role in the expression of root traits and their prospects in sustainable agriculture. The review will be helpful in providing future directions to the researchers working on PGPR and root system functioning.

show abstract

Section: Pgpr and Soil Structurementioning

confidence: 97%

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Grover

Bodhankar

Sharma

et al. 2021

Front. Sustain. Food Syst.

145

View full text Add to dashboard Cite

show abstract

“…Biofilms also defend the bacterial cells from host-immune evasion (Mah and O’Toole 2001 ; Donlan and Costerton 2002 ; Le et al 2018 ; Vestby et al 2020 ). Biofilm is a complex 3D structure of sessile microbial community covered by an exopolysaccharide glycocalyx (Otto 2008 ; Deka et al 2019 ). The biofilm-forming ability depends on several physicals, chemical, and biological factors (Garrett et al 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Characterization of methicillin-resistant Staphylococcus aureus through genomics approach

2020

Self Cite

View full text Add to dashboard Cite

In the present study, a total of 35 S. aureus isolates collected from two different geographical locations viz., Germany and Hungary were tested for their methicillin-resistant phenotype which revealed a high incidence of methicillin-resistant S. aureus. The quantitative test for biofilm production revealed that 73.3% of isolates were biofilm producers. The isolates were further characterized using a set of biochemical and genotypic methods such as amplification and analysis of S. aureus species-specific sequence and mecA gene. The 33 mecA positive isolates were then characterized by the amplification of SCCmec and pvl toxin genes. Further, based on the biofilm-forming phenotype, 15 isolates were selected and characterized through PCR–RFLP of coa gene, polymorphism of spa gene and amplification of biofilm-associated genes. The dendrogram prepared from the results of both biochemical and genotypic analyses of the 15 isolates showed that except for the isolates SA G5 and SA H29, the rest of the isolates grouped themselves according to their locations. Thus, the two isolates were selected for further characterization through whole-genome sequencing. Comparative genome analysis revealed that SA G5 and SA H29 have 97.20% ANI values with 2344 gene clusters (core-genome) of which 16 genes were related to antibiotic resistance genes and 57 genes encode virulence factors. The highest numbers of singleton genes were found in SA H29 that encodes proteins for virulence, resistance, mobile elements, and lanthionine biosynthesis. The high-resolution phylogenetic trees generated based on shared proteins and SNPs revealed a clear difference between the two strains and can be useful in distinguishing closely related genomes. The present study demonstrated that the whole-genome sequence analysis technique is required to get a better insight into the MRSA strains which would be helpful in improving diagnostic investigations in real-time to improve patient care.

show abstract

“…In most places, Pinus is usually cultivated in highly degraded soils, with low pH and problems regarding fertility and physical stability. This bacterium species produces exopolysaccharides that are responsible for its acid tolerance (Deka et al, 2019), what may improve rates of survival of the bacteria if inoculated on Pinus in field conditions. Furthermore, these exopolysaccharides are also correlated with soil aggregation (Deka et al, 2019), an important aspect to improve soil quality and plant growth.…”

Section: Discussionmentioning

confidence: 99%

GROWTH PROMOTION OF GENETICALLY IMPROVED Pinus taeda SEEDLINGS BY INOCULATION WITH SPECIES OF Bacillus.

Kondo

Primon²,

Fioreze

et al. 2020

CERNE

View full text Add to dashboard Cite

Bacterial exopolysaccharide promotes acid tolerance in Bacillus amyloliquefaciens and improves soil aggregation

Cited by 34 publications

References 48 publications

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Characterization of methicillin-resistant Staphylococcus aureus through genomics approach

GROWTH PROMOTION OF GENETICALLY IMPROVED Pinus taeda SEEDLINGS BY INOCULATION WITH SPECIES OF Bacillus.

Contact Info

Product

Resources

About