Untitled

Lp, Bakhaeva; Gk, Vasil'eva; Eg, Surovtseva; Vm, Mukhin

doi:10.1023/a:1010411629428

Cited by 24 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Transport of lipoproteins, lipopolysaccharides, and fucose are all correlated with seedling biomass (Figure 5). Lipoproteins are essential to forming biofilms and colonizing plant roots (Campisano et al, 2006; Ghafoor et al, 2011) and lipopolysaccharides are known mediators between plant roots and soil bacteria (Duijff et al, 1997; Reitz et al, 2000; Fedonenko et al, 2001). Lipopeptides are regulatory compounds in Pseudomonas -root interactions that influence antimicrobial activity, motility, and biofilm formation (Song et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

Pseudomonas fluorescens Transportome Is Linked to Strain-Specific Plant Growth Promotion in Aspen Seedlings under Nutrient Stress

et al. 2017

View full text Add to dashboard Cite

Diverse communities of bacteria colonize plant roots and the rhizosphere. Many of these rhizobacteria are symbionts and provide plant growth promotion (PGP) services, protecting the plant from biotic and abiotic stresses and increasing plant productivity by providing access to nutrients that would otherwise be unavailable to roots. In return, these symbiotic bacteria receive photosynthetically-derived carbon (C), in the form of sugars and organic acids, from plant root exudates. PGP activities have been characterized for a variety of forest tree species and are important in C cycling and sequestration in terrestrial ecosystems. The molecular mechanisms of these PGP activities, however, are less well-known. In a previous analysis of Pseudomonas genomes, we found that the bacterial transportome, the aggregate activity of a bacteria's transmembrane transporters, was most predictive for the ecological niche of Pseudomonads in the rhizosphere. Here, we used Populus tremuloides Michx. (trembling aspen) seedlings inoculated with one of three Pseudomonas fluorescens strains (Pf0-1, SBW25, and WH6) and one Pseudomonas protegens (Pf-5) as a laboratory model to further investigate the relationships between the predicted transportomic capacity of a bacterial strain and its observed PGP effects in laboratory cultures. Conditions of low nitrogen (N) or low phosphorus (P) availability and the corresponding replete media conditions were investigated. We measured phenotypic and biochemical parameters of P. tremuloides seedlings and correlated P. fluorescens strain-specific transportomic capacities with P. tremuloides seedling phenotype to predict the strain and nutrient environment-specific transporter functions that lead to experimentally observed, strain, and media-specific PGP activities and the capacity to protect plants against nutrient stress. These predicted transportomic functions fall in three groups: (i) transport of compounds that modulate aspen seedling root architecture, (ii) transport of compounds that help to mobilize nutrients for aspen roots, and (iii) transporters that enable bacterial acquisition of C sources from seedling root exudates. These predictions point to specific molecular mechanisms of PGP activities that can be directly tested through future, hypothesis-driven biological experiments.

show abstract

Section: Discussionmentioning

confidence: 99%

Pseudomonas fluorescens Transportome Is Linked to Strain-Specific Plant Growth Promotion in Aspen Seedlings under Nutrient Stress

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The root hair deformations of E. sieboldianus in vitro plantlets resemble those observed with other microbes like Rhizobium leguminosarum bv viciae in Vicia sativa (Heidstra et al 1994), Rhizobium meliloti in Medicago truncatula (Ardourel et al 1994), Rhizobium trifolii in Trifolium repens (Ervin and Hubbell 1985), Azospirillum brasiliense in Fragaria 9 ananassa (Bellone and de Bellone1995) and Triticum aestivum (Fedonenko et al 2001) and Ligniera pilorum in T. aestivum (Barr 1979). However, this does not necessarily mean similar modes of infection in the Fabales/ Rhizobium symbiosis compared to the Eleutherococcus in vitro systems, and the causative interrelationship between Eleutherococcus sp.…”

Section: Discussionmentioning

confidence: 58%

Isothermal DNA amplification facilitates the identification of a broad spectrum of bacteria, fungi and protozoa in Eleutherococcus sp. plant tissue cultures

Müller

Döring

2009

Plant Cell Tiss Organ Cult

View full text Add to dashboard Cite

In vitro cultures of Eleutherococcus sieboldianus originating from surface sterilized leaf explants were found to be associated with several microorganisms. The associations included bacteria, fungi and protozoa within the rhizosphere and inside root hairs. To determine if this phenomenon is unique to this species, plant tissue cultures of E. gracilistylus and E. senticosus were included in our studies for comparison. A methodology consisting of isothermal amplification, cloning and sequencing was established for analysing 16S ribosomal DNA of cultivated and non-cultivated bacteria from different tissue types. The same methodology was used to obtain internal transcribed spacer regions and 18S regions of fungal and protozoan rDNA. Comparative analyses of sequencing data resulted in the identification of various genera within the Firmicutes and c-proteobacteria kingdoms and a broad spectrum of fungal genera related to several uncultured fungi. In addition, amoebal and chrysophyte species were detected. Most of the species were identified in different plant organs and in in vitro culture cell types indicating the microorganisms are systemically distributed. The presence of identical microorganisms in different plant species argues for an evolutionary long-lasting and stable association between the plant genus and the microinhabitants.

show abstract

Exopolysaccharides of Paenibacillus polymyxa Rhizobacteria in Plant–Bacterial Interactions

Yegorenkova

2013

Bacteria in Agrobiology: Crop Productivity

View full text Add to dashboard Cite

Untitled

Cited by 24 publications

References 16 publications

Pseudomonas fluorescens Transportome Is Linked to Strain-Specific Plant Growth Promotion in Aspen Seedlings under Nutrient Stress

Pseudomonas fluorescens Transportome Is Linked to Strain-Specific Plant Growth Promotion in Aspen Seedlings under Nutrient Stress

Isothermal DNA amplification facilitates the identification of a broad spectrum of bacteria, fungi and protozoa in Eleutherococcus sp. plant tissue cultures

Exopolysaccharides of Paenibacillus polymyxa Rhizobacteria in Plant–Bacterial Interactions

Contact Info

Product

Resources

About