Class 1 integrons contribute to the emerging problem of antibiotic resistance in human medicine by acquisition, exchange, and expression of resistance genes embedded within gene cassettes. Besides the clinical setting they were recently reported from environmental habitats and often located on plasmids and transposons, facilitating their transfer and spread within bacterial communities. In this...

Effect of Date Kernel Biochars on Enzymatic Activity in Rhizosphere and Non-rhizosphere Soils European Borage (Borago officinalis L.)

The diverse genetic and functional groups of the extensive soil microbial populations are known to carry out activities exerting a critical impact on soil functions (Barea et al., 2005b; Avis et al., 2008). Among other activities, soil rnicroorganisms propel the biogeochemical cycling of nutrients and organic matter and improve plant performance and soil quality, key issues for agroecosystem se...

to identify arbuscular mycorrhiza fungi (amf) associated with crataegus pontica c. koch, 54 soil samples were collected from the rhizosphere of this plant in ilam province, western iran. isolation of mycorrhizal spores was conducted by wet sieving followed by centrifuge. amf were identified based on morphological characteristics of spores. in this study, 13 species of amf belonging to five gene...

abstract the objectives of this research was to evaluate the rhizospheric effects of wheat (triticum aestivum l.) on the status of various inorganic p fractions and total organic p in 10 calcareous soils amended with 1% (w/w) municipal sewage sludge from the refinery of shahrekord city under rhizobox conditions. thus, wheat plant was planted in completely randomized design with three replicatio...

To investigate quorum sensing in rhizosphere soil, a whole-cell biosensor, Agrobacterium tumefaciens(pAHL-Ice), was constructed. The biosensor responded to all N-acyl homoserine lactones (AHLs) tested, except C(4) homoserine lactone, with a minimum detection limit of 10(-12) M, as well as to both exogenously added AHLs and AHL-producing bacterial strains in soil. This highly sensitive biosensor...

abstractin order to study the changes in chemical forms of zinc in the rhizosphere of two tuber plants and their relationship to plant uptake in a polluted soil, sequential (tessier et al., 1979) and single step extraction methods were used. in this research, three radish cultivars (raphanus sativus) and two turnip (brassica rapa) cultivars were planted in a complete randomized design pot exper...

Meyerozyma caribbica MG20W was originally isolated from rhizosphere soil on reclaimed land in the Republic of Korea. We describe herein the 10.64-Mbp-long genome sequence of M. caribbica MG20W, which exhibits high salt resistance.

Plants and microbes interact in various relationships which have both adverse and beneficial effects on plant growth and microbial communities. Many processes of these interactions occur at or near the root–soil interface, which is known as the rhizosphere. The rhizosphere is defined as the soil region under the immediate influence of plant roots. Many studies suggest that the microbial communi...

ing in the rhizosphere for decades, in the form of plant growth-promoting microorganisms. Efforts to incorporate microbial management into mainstream practices have not been successful. In fact, the same practices that increased yields in the last 50 years (namely fertilizers, herbicides, and pesticides) have largely eradicated natural rhizosphere microbes in agrosystems (Matson et al. 1997) an...