In the present
work, by determining the content of malondialdehyde, proline and total
protein, an attempt was made to find out the role of presowing
irradiation of seeds in the development of corn in salt conditions. In
so doing, a rather wide range was used, both of the radiation dose and
the salt concentration. The effects of radiation and salt have been
studied separately as well as in their combination. It was shown that
pre-seed γ-irradiation of seeds in doses from 5 to 100 Gy in normal
conditions contributes to a slight increase in the level of MDA.
However, in the case of salt stress, NaCl in concentrations from 1 to
50 mM for unirradiated seeds, on the contrary, causes a strong increase
in the content of MDA. And with the joint action of salt and radiation
(radiation doses of 1–50 Gy, salt concentration 1–10 mM), the content
of lipid oxidation product remains almost constant. It has been
established that proline, as an antioxidant, plays an insignificant
role in protecting the plant from salt stress. However, in pre-sowing
at low doses, the role of proline in protecting the plant from salt
stress is essential. It is shown that both higher radiation doses and
higher concentrations of NaCl separately lead to a decrease in total
protein content. And in the case of double stress for seeds irradiated
in small doses, salt at concentrations up to 1 mM does not cause
changes in the total protein content. Moreover, for seeds irradiated in
large doses, a sharp decrease in the protein content is observed.
It is assumed that pre-sowing irradiation of seeds in certain doses, to some extent, facilitates salt stress at low concentrations of NaCl.