Article review and summary Essay Example | Topics and Well Written Essays - 1250 words

Article review and summary - Essay ExampleTheir population is excessively closely modulate by the presence of predators that argon feeding on these bacterium like protozoa and nematodes. But also the opposite is true where the presence and activity of the rhizosphere bacteria determines the root growth patterns and concentrations of plant grow (Bowen 1999) (Gryndler 2000).This is because the plants and the rhizosphere plant are interconnected and they are dependent on the bacteria in the rhizosphere. There are bacteria from different species (Bradyrhizobium, Sinorhizobium, Rhizobium and others) for example that posses the nitrogenase enzyme and are able to reduce the atmospheric nitrogen into soluble ammonium hydroxide that can be used by root plants. These bacteria also secrete root factors that shape up the growth of root nodules that are N2 fixating symbiotic organs of the plants. Other way of interaction between thee roots and the rhizosphere bacteria is the antagonistic e ffect that some bacteria fuddle on other bacteria that are pathogenic and harmful for the plant (Pythium, Rhizoctonia, Phytophthora etc.). The ability of the bacteria to antagonize the growth of organisms that are pathogenic to plants is researched on many prokaryotic and eukaryotic organisms (Bacillus species, Pseudomonas species, Agrobacterium species etc) (Whipps 1997). Pseudomonas fluorescence one of the most hard-hitting bacteria that colonizes the roots and has important function in antagonizing the flourishing of pathogenic bacteria that can have significantly negative effect on the rot health and agricultural impact. This is why there is a substantial interest about the effect of different fertilizers and additives that are used in the agriculture instantly and the impact of these materials on the rhizosphere (Kennedy 1998). The normal population of Pseudomonas spp. has important role in the normal cognitive process of the plant roots and this is why it is a subject of a number of studies that are trying to excuse the mechanisms of growth for this