2019,    N 3 (37)    

BIOLOGICAL RESOURCES

Bukharina I., Islamova N., Zhavad A., Abdullah M., Lebedeva M., Shashov L.

Features of the formation of metal resistance during inoculation of tomato with micromycete Cylindrocarpon magnusianum

The results of experiments on the effect of inoculation with the endotrophic fungus Cylindrocarpon magnusianum on the physiological and biochemical parameters of tomato are presented in the article. The scheme of the experiment included inoculation with the fungal culture (control) and the populations of this fungus, previously grown on agar media with the different concentrations of heavy metals. Inoculated plants were grown on a control substrate (without heavy metals) and on substrates with various concentrations of heavy metals (zinc, copper, lead and chromium). Inoculation of tomato plants by the control population of the fungus under the influence of heavy metal salts in the substrate resulted in a decrease in the chlorophyll a content, and in the action of chromium salts, and a decrease content of chlorophyll b and carotenoids in the leaves, and a decrease of plant biomass. The stimulating effect, which increases the resistance of plants to the action of heavy metal salts, is not revealed in the inoculation of plants by the control population of the fungus Cylindrocarpon magnusianum. At the same time, with inoculation of plants with fungus populations adapted to the action of heavy metal salts and subsequent plant growth on the control substrate, in most variants the effect of increasing the chlorophyll a, chlorophyll b content was revealed. Minimal differences with the control of physiological and morphological parameters of plants were observed only when the plants were inoculated with Cylindrocarpon magnusianum populations adapted to different concentrations of heavy metal salts and when inoculated plants were grown under conditions of high content of heavy metal salts in the substrate.

Keywords: CYLINDROCARPON MAGNUSIANUM, FUNGI, HEAVY METALS, INOCULATION, CHLOROPHYLLS, CAROTENOIDS, BIOCHEMICAL INDICES