The use of excess conventional Phosphorus (P) fertilizers to improve agricultural productivity, in order to meet constantly increasing global food demand, potentially causes surface and ground water pollution, waterway eutrophication, soil fertility depletion, and accumulation of toxic elements such as high concentration of selenium (Se), arsenic (As) in the soil. Quite a number of soil microor...

We describe a simple, noninstrumental procedure for detecting hemoglobin S in samples of blood on filter paper, with use of small volumes of reagents. The method depends on the differential solubilities of reduced sickling and nonsickling hemoglobin in phosphate solutions (1, 2) or Sickledex reagent’ and the apparent solubilizing effect of urea on reduced hemoglobin S (3). The color of paired p...

in order to evaluate the efficiency of plant growth promoting rhizobacteria (pgpr) plus nitrogen and phosphorous chemical fertilizers on relative agronomic efficiency of p and n fertilizers and some agronomic parameters of wheat (triticum aestivum l.) cultivar n-80-19, an experiment was conducted at sari agricultural sciences and natural resources university during growing season of 2008-2009. ...

Plant growth promoting rhizobacteria can affect plant growth by different direct and indirect mechanisms [1]. PGPR influence direct growth promotion of plants by fixing atmospheric nitrogen, solubilizing insoluble phosphates, secreting hormones such as IAA, GAs, and Kinetics besides ACC deaminase production, which helps in regulation of ethylene. Induced systemic resistance (ISR), antibiosis, c...

This paper reports a study of the effect of three nuclear and one thermal power plants on the microbial ecology of soils. Populations of bacteria, actinomycetes, fungi, cellulolytic microbes, phosphate-solubilizing microbes and nitrogen-fixing microbes in the soil in the vicinity of each plant were studied. Soils were acidic at three sites, and moisture contents of the power plant soils were lo...

phosphorus is an essential element for plants. much of the agricultural lands of iran has calcareous soils, in which, due to high ph, phosphorous availability is less, therefore, it appears as a limiting factor for plant growth. application of biofertilizers instead of chemical ones has gained attention in order to produce healthy crops, reduce pollution of soil and water resources by reducing ...

Plant Growth Promoting Rhizobacteria (PGPR) represent a microbial community that exerts growth-promoting capabilities in plants by various mechanisms. Among the PGPR genera, Pseudomonas spp. deserves special attention. It is due to its characteristic traits, like production of phytohormones and siderophores, solubilization minerals phosphates, plant protection from biotic abiotic stress. These ...

the iranian thymus daenensis subsp. daenensis is rich in monoterpene phenols (especially thymol and carvacrol). this research was conducted to isolate and characterize the plant growth promoting rhizobacteria (pgprs) from rhizosphere of t. daenensis. pgprs were screened based on some physiological traits including iaa production, phosphate solubilization, and siderophore compounds production ab...