Heavy-metal contaminants are one of the most relevant problems of contemporary agriculture. High toxicity and the ability to accumulate in soils and crops pose a serious threat to food security. To solve this problem, it is necessary to accelerate the pace of restoration of disturbed agricultural lands. Bioremediation is an effective treatment for agricultural soil pollution. It relies on the ability of microorganisms to remove pollutants. The purpose of this study is to create a consortium based on microorganisms isolated from technogenic sites for further development in the field of soil restoration in agriculture. In the study, promising strains that can remove heavy metals from experimental media were selected: Pantoea sp., Achromobacter denitrificans, Klebsiella oxytoca, Rhizobium radiobacter, and Pseudomonas fluorescens. On their basis, consortiums were compiled, which were investigated for the ability to remove heavy metals from nutrient media, as well as to produce phytohormones. The most effective was Consortium D, which included Achromobacter denitrificans, Klebsiella oxytoca, and Rhizobium radiobacter in a ratio of 1:1:2, respectively. The ability of this consortium to produce indole-3-acetic acid and indole-3-butyric acid was 18.03 μg/L and 2.02 μg/L, respectively; the absorption capacity for heavy metals from the experimental media was Cd (56.39 mg/L), Hg (58.03 mg/L), As (61.17 mg/L), Pb (91.13 mg/L), and Ni (98.22 mg/L). Consortium D has also been found to be effective in conditions of mixed heavy-metal contamination. Due to the fact that the further use of the consortium will be focused on the soil of agricultural land cleanup, its ability to intensify the process of phytoremediation has been studied. The combined use of Trifolium pratense L. and the developed consortium ensured the removal of about 32% Pb, 15% As, 13% Hg, 31% Ni, and 25% Cd from the soil. Further research will be aimed at developing a biological product to improve the efficiency of remediation of lands withdrawn from agricultural use.
This article demonstrates that modern Russia is facing the necessity to find ideological guidelines for further development
The article analyses the ideological dimension of formation of the network society. A new era has set the new global challenges
In the modern Russian society everyday life approves itself as an important fragment of social reality. The ideological everyday life discourse actualization is driven by the importance and efficiency of its heuristic potential under the conditions when the situation dictates the requirement of new understanding of habitual long-held categories and approaches, and the processes setting the horizon of the possible changes move to the forefront. The article reveals the notional format of cultural and historical development of everyday life that allows emphasizing issues and plots of the analysis which is connected with application of logically linked procedures broadening the opportunities of interpretation of different plots and aspects of social
Probiotics are live microorganisms that can confer health benefits through their effects on the gastrointestinal tract when administered in adequate amounts. In the modern world, the most acute problem is dysbacteriosis. Virtually any changes in the gut microbiome are associated with pathological conditions. On the one hand, this creates the need to treat the underlying disease, and on the other, the need to restore the natural human microbiota. To restore the natural microflora, lactic acid bacteria (LAB) can be used, due to the ability to suppress the growth and development of pathogenic and opportunistic microorganisms. Probiotics isolated from the gastrointestinal tract (including some strains of Lactobacillus acidophilus) are more resistant to extreme environmental conditions and are able to attach to the cell wall of the human intestine. The paper studied the resistance of a consortium of microorganisms of the genus Lactobacillus acidophilus to opportunistic pathogens and extreme conditions of the gastrointestinal tract. It has been established that acidophilus bacillus strains are resistant to the following conditionally pathogenic microorganisms: Candida lipolit, Aspergillus niger, Staphylococcus albus and Escherichia coli. In this work, a consortium of acidophilus rods is resistant to 0,4% phenol. Also, the consortium is able to develop in the presence of a significant concentration of bile (40%) and 2% NaCl.
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