Plant Steroid Hormones As Unique Constituents of Devonian Oils of Belarus
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HEMISTRY
Plant Steroid Hormones As Unique Constituents of Devonian Oils of Belarus Foreign Member of the RAS R. G. Garetskya, Ya. G. Gribika, R. P. Litvinovskayab, A. L. Savchukb,
M. A. Mardosevichb, and V. A. Khripachb,*
Received May 19, 2020; revised May 20, 2020; accepted June 25, 2020
Abstract—The content of plant hormones (brassinosteroids) in oil samples from a number of oilfields in Belarus is determined using an enzyme immunoassay method. Brassinosteroids of the brassinolide, 24-epibrassinolide, and 28-homobrassinolide types have been found in fossil material for the first time. The brassinosteroid content of oil varies from 0.87 to 8.82 ng/g, which is comparable to their content in plant objects. Keywords: brassinosteroids, enzyme immunoassay, petroleum DOI: 10.1134/S1028334X2009007X
Studies of constituents of oil and the effects they cause showed that small amounts of oil that get into soil are not only harmless to plants but may even stimulate their growth [1]. In studying the capability of oilcontaminated soil for self-regeneration, it was found that additions of oil up to 0.06% and 0.16% had stimulating effect on the growth of the narrow-leaf pepperwort (Lepidium ruderale L.) and common mugwort (Artemisia vulgaris L.), respectively [2]. Petroleum acids—aliphatic, naphthenic, and aromatic ones, as well as their derivatives—are the most well-studied constituents of oil [3]. In the middle of the past century, a 40% aqueous solution of petroleum acid sodium salts extracted from kerosenes and diesel oils was patented as a growth substance [4]. The growth substance was shown to have a marked positive effect on the growth, development, and acclimatization of seedlings of wood species and other plants [5]. Modern analytical techniques for determination of organic compounds enable more accurate identification of the constituents of oil samples present in oil in very low concentrations yet capable of exhibiting a high physiological activity, including stimulation of plant growth. The latter are represented by brassinosteroids (BSs), plant hormones inherent to the whole plant kingdom [6, 7]. Considering that oil-bearing rocks contain plant residues, we can assume that oil a Institute for Environmental Management, National Academy
of Sciences of Belarus, Minsk, 220076 Belarus b Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Minsk, 220141 Belarus *e-mail: [email protected]
may also contain steroid hormones characteristic of plant organisms. This study is aimed at testing this hypothesis using an analytical method developed by us earlier specifically for this type of hormones [8, 9]. We succeeded in detecting and quantifying the hormones considered in all oil samples analyzed, and to the best of our knowledge this is the first time that such complex, biologically significant molecules have been found among the constituents of a fossil material. We studied six oil samples from fie oilfields situated in the Pripyat oil basin, the sole one in Belarus. Geologically, the Pripyat oil basi
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