Information on the thesis

The thesis deals with the study of the role of external salicilyc acid in wheat
Triticum aestivum L. and buckwheat Fagopyrum esculentum Moench. plants under toxic
effects of cadmium chloride.
The aim of the investigation was to determine the morphometric parameters,
changes of the photosynthesis and changes of antioxidant protection, which was
accompanied by a change in the content of phenolic compounds and enzymes involved in
protection against the action of cadmium chloride.
As a result of the research we found, that salicylic acid positively influenced the
initial stages of plant growth, stimulating the seed germination. Determined the negative
influence of cadmium ions on the content of photosynthetic pigments, decrease growth
parameters of buckwheat and wheat plants. Cadmium as one of the most toxic metals has
negative affects on photosynthesis, change the structure and the functioning of chlorophyll
molecules. Salicylic acid can mitigate the toxic effects of heavy metal ions, has positive
affect on the structure and functioning of photosynthetic pigments and increase
morphometric parameters under stress conditions. The increase of phenolic compounds in
plant tissue of 14- and 21-day-old plants against the background of inhibition of growth by
cadmium ions indicates their prooxidant role. Reducing the concentration of phenols in the
roots and shoots of plants and increasing the content of anthocyanins due to preincubation
of salicylic acid indicates that they are one of the components of the adaptive response of
plants to stress by cadmium. The results of lignification process shown differences in the
accumulation of lignin in the different part in plant, also this process depends on the
conditions of growth and plant species. Salicylic acid induced process of lignification,
because salicylic acid is phenolic compound.
The positive results will allowto use salicylic acid as an efficient and cheap way to
treat plants under conditions of environmental heavy metals pollution.Salicylic acid has positiveeffect on morphometric parameters, stabilized the photosynthesis and normalized
the content of phenolic compounds due the work of enzymes under conditions of cadmium
stress. It is necessary to indicate the specific nature the response of plants to the stress
protective role of salicylate for the toxic effects of cadmium. We studied buckwheat and
wheatplants. The obtained results show positive effect of salicylate for both plants species.
The concentration of salicylic acid (0,05mM) has positive influenced for
photosynthesis, also did not cause significant changes in the pool of phenolic compounds.
Therefore, for future research, we recommend use this concentration of salicylic acid, but
at the same time,take into account the specificity of the species.

Key words: wheat, buckwheat, salicylic acid, cadmium, phenolic compounds,
enzyme activity, photosynthesis, morphophysiological parameters.