Abstract
As a result of the work, the regularities of the impact of diatomite were revealed on the processes of growth, development and accumulation of Proline in the cells of stems and roots of higher plants. The influence of this mineral on the stress reactions of higher plants were also tested a number of key abiotic environmental stress factors such as salinization,. In the course of the work it was found that salt stress increases the content of free Proline. When treating plants with diatomite, the content of free Proline increased significantly than on untreated plants. Therefore, diatomite performs a protective function in preventing negative environmental effects on higher plants. The obtained results expand the possibilities of using diatomite as a natural fertilizer to increase the plant’s resistance to biotic and abiotic stresses.