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On the Sorption-Stimulating Preparations Influence on Seed Germination

Abstract

The influence of various types of impacts on soil samples on the germination of seeds and the development of seedlings in comparison with sand (allelotoxicity) was studied. It is established that various types of soil sample preparation can significantly affect their allelotoxicity. It is shown that initial soil stimulated seedling development (+23%). Drying to air-dry state with further wetting increased the allelotoxicity to –27%. Autoclaving of samples (148°C, 4.5 atm) increased their allelotoxicity to –77%. The data obtained suggest that allelotoxins can exist in the soil in active and fixed forms and pass from the fixed form to the active form under various types of impacts on the soil. The study of the influence of the allelotoxicity of soil samples on the application efficiency of sorption-stimulating preparation (SSP), used for the pre-sowing treatment of spring wheat seeds, shows that the application effect of SSP monotonically decreases when allelotoxicity increases. The calculations show that the amount of sorbent used to protect seeds from allelotoxins is 3–4 orders of magnitude lower than the amount that can fix allelotoxins contained in soils. It follows from above that the development of seed seedlings is affected only by a small part of allelotoxins present in soils in the active state.

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Notes

  1. 1.

    Biotesting is currently considered the only method suitable for studying the allelotoxicity of soils [6]. This is due to the fact that, even knowing the concentrations of hundreds of allelotoxins that may be present in soils, it is impossible to predict the effect of their combined action due to the mutual influence of allelotoxins on each other and different degrees of their fixation in soils.

  2. 2.

    It should be noted that autoclaving of samples at 125°C, as well as heating wet samples at temperatures of 80–100°C in closed vessels do not lead to a significant increase in allelotoxicity. It is close to zero.

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Correspondence to T. A. Gracheva.

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The authors declare that they have no conflict of interest. This article does not contain any studies involving animals or human participants performed by any of the authors.

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Translated by M. Batrukova

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Shoba, S.A., Fedotov, G.N., Gorepekin, I.V. et al. On the Sorption-Stimulating Preparations Influence on Seed Germination. Dokl Biochem Biophys 499, 238–241 (2021). https://doi.org/10.1134/S1607672921040165

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Keywords:

  • allelotoxicity of soils
  • seed stimulation
  • pre-sowing seed treatment
  • sorption-stimulating preparation
  • the effect of soil allelotoxicity on the effectiveness of the stimulant use
  • the uptake of allelotoxins from the soils by plants