Influence of a Hydrocarbon Biodestructor on the Growth and Content of Phytohormones in Secale cereale L. Plants under Petroleum Pollution of the Soil

Yulia Sotnikova, Anna Grigoriadi, Vadim Fedyaev, Margarita Garipova, Ilshat Galin, Guzal Sharipova, Anna Yamaleeva, Sergey Chetverikov, Dmitriy Veselov, Guzel Kudoyarova () and Rashit Farkhutdinov
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Yulia Sotnikova: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia
Anna Grigoriadi: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia
Vadim Fedyaev: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia
Margarita Garipova: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia
Ilshat Galin: Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Science, 450054 Ufa, Russia
Guzal Sharipova: Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Science, 450054 Ufa, Russia
Anna Yamaleeva: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia
Sergey Chetverikov: Laboratory of Agrobiology, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Science, 450054 Ufa, Russia
Dmitriy Veselov: Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Science, 450054 Ufa, Russia
Guzel Kudoyarova: Laboratory of Plant Physiology, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Science, 450054 Ufa, Russia
Rashit Farkhutdinov: Biological Department, Ufa University of Science and Technology, 450076 Ufa, Russia

Agriculture, 2023, vol. 13, issue 8, 1-12

Abstract: The phytoremediation of soil contaminated with petroleum depends on the association of plants with rhizosphere bacteria capable of promoting plant growth and destroying petroleum hydrocarbonates. In the present work, we studied the effects of “Lenoil” biological product containing bacteria Pseudomonas turukhanskensis IB 1.1, capable of destroying petroleum hydrocarbons on Secale cereale L plants, which previously proved to be resistant to the weak oil pollution of gray forest soil and to the composition of microorganisms in their rhizosphere. The composition of microorganisms in the rhizosphere of rye roots was studied, morphometric parameters of shoots and roots of rye plants were estimated, and hormone concentration was immunoassayed under conditions of 4% petroleum pollution of the soil. Addition of petroleum to the soil increased the content of oligonitrophilic (by 24%) and hydrocarbon-oxidizing (by 33%) microorganisms; however, the content of cellulolytic (by 12.5 times) microorganisms in the rhizosphere decreased. The use of Lenoil led to a further increase in the number of cellulolytic (by 5.6 times) and hydrocarbon-oxidizing (by 3.8 times) microorganisms and a decrease in the number of oligonitrophilic (by 22.7%) microorganisms in the rhizosphere. Under petroleum pollution, the content of auxins (IAA), zeatin riboside, zeatin nucleotide, and zeatin decreased, while the content of abscisic acid (ABA) increased in the shoots of rye plants. Lenoil treatment led to an eight-fold increase in the IAA content in the roots and a decrease in the ABA content in the aerial part and in the roots. It was shown for the first time that the treatment of petroleum-contaminated soil with “Lenoil” increased root mass due to the development of lateral roots, concurrent with high root IAA content. Petroleum pollution increased the deposition of lignin and suberin in the roots, which strengthened the apoplastic barrier and, thus, reduced the infiltration of toxic components. The deposition of suberin and lignin decreased under ”Lenoil” treatment, indicating a decrease in the concentration of toxic petroleum components in the soil degraded by the bacteria. Thus, the biological preparation reduced the growth-inhibiting effect of petroleum on rye plants by increasing the content of growth-stimulating phytohormones (IAA and cytokinins) and reducing the content of ABA, justifying the importance of further study of relevant hormones for the improvement of phytoremediation.

Keywords: Secale cereale L.; petroleum contamination of the soil; “Lenoil” biopreparation; phytoremediation; phytohormones; lignin; suberin (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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