Influence of Hydrocarbon-Oxidizing Bacteria on the Growth, Biochemical Characteristics, and Hormonal Status of Barley Plants and the Content of Petroleum Hydrocarbons in the Soil

Abstract

Much attention is paid to the relationship between bacteria and plants in the process of the bioremediation of oil-contaminated soils, but the effect of petroleum degrading bacteria that synthesize phytohormones on the content and distribution of these compounds in plants is poorly studied. The goal of the present field experiment was to study the effects of hydrocarbon-oxidizing bacteria that produce auxins on the growth, biochemical characteristics, and hormonal status of barley plants in the presence of oil, as well as assessing the effect of bacteria and plants separately and in association with the content of oil hydrocarbons in the soil. The treatment of plants with strains of Enterobacter sp. UOM 3 and Pseudomonas hunanensis IB C7 led to an increase in the length and mass of roots and shoots and the leaf surface index, and an improvement in some parameters of the elements of the crop structure, which were suppressed by the pollutant. The most noticeable effect of bacteria on the plant hormonal system was a decrease in the accumulation of abscisic acid. The data obtained indicate that the introduction of microorganisms weakened the negative effects on plants under abiotic stress caused by the presence of oil. Plant-bacteria associations were more effective in reducing the content of hydrocarbons in the soil and increasing its microbiological activity than when either organism was used individually.

Phytotoxic Effects of Kerosene on Plants of Forest and Bog Phytocenoses of Southern Taiga

“…The slower recovery of vegetation relative to the microbial community can be explained not only by the slower cycles of plant development and reproduction, but also by the relationship between plants and soil microbiota. It is generally assumed that there is a two-way positive relationship between plants and bacteria during the phytoremediation of oil pollution: on the one hand, plants stimulate microbiological activity and, on the other hand, plant-associated microorganisms under these conditions reduce environmental harshness for plants and improve their growth [33,34]. The results of this work, on the one hand, support the relationship between microbiome and vegetation recovery after fuel but, on the other hand, lead us to think about the priority role of one of the components of ecosystems in this process.…”

Influence of Bacteria of the Genus Pseudomonas on Leguminous Plants and Their Joint Application for Bioremediation of Oil Contaminated Soils

“…One of the main objectives of the study was to confirm the possibility of increasing the efficiency of phytoremediation by introducing bacteria. The joint use of plants and bacteria for the recultivation of soils contaminated with hydrocarbons is based on the mutually beneficial relationship that exists between them: the plant provides bacteria with easily accessible food sources, while the bacteria help plants survive in a toxic environment, stimulating their growth and reducing the concentration of harmful substances in the soil [ 39 , 55 , 56 ]. Good results have been obtained using biopreparations based on Pseudomonas strains together with plants of the legume family in the restoration of oil-contaminated lands [ 57 , 58 , 59 , 60 ].…”

Kerosene Biodegradation by Highly Efficient Indigenous Bacteria Isolated From Hydrocarbon-Contaminated Sites

“… 5 Studies showed that soil pollution with kerosene also affects agricultural productivity by adversely affecting soil fertility. 6 …”

“…5 Studies showed that soil pollution with kerosene also affects agricultural productivity by adversely affecting soil fertility. 6 Many studies have been dedicated to maintaining ecosystem health and functioning by reclaiming polluted lands and utilizing several restoration technologies. Consequently, mechanical, chemical, and biological approaches have been used to reduce and/or eliminate pollution from petroleum compounds.…”