Stem end rot is the most destructive disease caused by Alternaria alternata YZU in pitaya-growing regions of Vietnam. This study was conducted to characterize antagonistic phosphate-solubilizing bacteria (PSB) from rhizosphere soil for their biocontrol activities against A. and evaluate effect temperature, pH, water activity on that antagonism. Among seven PSB isolated 45 samples, PSB31 (identi...

Radial oxygen loss (ROL) has been suggested to be a major process to protect plants exposed to the anaerobic by-products of soil anaerobiosis. The aim of the present study was to test the effects of root ROL from two submerged plants (Hydrilla verticillata and Vallisneria spiralis) on the rhizosphere oxygen profile and rhizosphere microarea. Phospholipid fatty acids (PLFAs) of sediment samples ...

− Nutrient acquisition by plants occurs in an environment characterized by complex interactions between roots, micro-organisms and animals, termed the rhizosphere. Competition for mineral elements in this sphere is high. The rhizosphere processes are driven by photosynthetically fixed carbon released by roots either directly to mycorrhizal fungal symbionts or as exudates fuelling a wider spectr...

Knowledge on the factors that determine the composition of bacterial communities in the vicinity of roots (rhizosphere) is essential to understand plant-soil interactions. Plant species identity, plant growth stage and soil properties have been indicated as major determinants of rhizosphere bacterial community composition. Here we show that the presence of saprotrophic fungi can be an additiona...

The rhizosphere, the soil fraction closely associated with plant roots, consists of a complex environment conditioned by plant exudates and abiotic conditions. This zone is rich in microbial activity which takes part in biological and ecological processes important for plant health. As a result, many studies dealing with the rhizosphere focus on microbial ecology and physiology and more specifi...

Determining the nutrient requirements of industrial hemp to increase yield requires quantifying variations in soil nutrients and enzyme activities different growth stages, along with relevant microbial response. This study investigated effects stages on rhizosphere nutrients, activities, communities. The results showed that pH available phosphorus (AP) decreased, while organic matter (SOM), nit...


 Calcium precipitation and biofilm formation in halophilic bacteria were investigated the current study. The strain SMK (Bacillus licheniformis) was isolated from plant rhizosphere AQ-1 (Alcaligenes faecalis) marble crushing soil Lahore. Bacterial growth, CaCO3 of both strains determined under varying stress (pH, temperature, agitation salinity). Soil aggregation salt (NaCl MgSO4). Result...

The objective of this study was to assess the effect of a rooted macrophyte Elodea nuttallii on rhizosphere bacterial communities in Hg contaminated sediments. Specimens of E. nuttallii were exposed to sediments from the Hg contaminated Babeni reservoir (Olt River, Romania) in our microcosm. Plants were allowed to grow for two months until they occupied the entirety of the sediments. Total Hg a...

Sustainable management of crop productivity and health necessitates improved understanding of the ways in which rhizosphere microbial populations interact with each other, with plant roots and their abiotic environment. In this study we examined the effects of different soils and cultivars, and the presence of a soil-borne fungal pathogen, Verticillium dahliae, on the fungal microbiome of the r...

The hypothesis that sweet potato genotypes containing different starch yields in their tuberous roots can affect the bacterial communities present in the rhizosphere (soil adhering to tubers) was tested in this study. Tuberous roots of field-grown sweet potato of genotypes IPB-149 (commercial genotype), IPB-052, and IPB-137 were sampled three and six months after planting and analyzed by denatu...