Salt Stress Effects on <i>Robinia Pseudoacacia</i> Seed Germination and Early Development Stages of Seedlings
On a global scale, forests provide fundamental protection of soil and water resources, so it is important to monitor their condition, which is directly affected by various biotic and abiotic factors. One of these factors is salt stress. Soil salinization can affect trees at all stages of growth and development. At the moment, the area of subjected to salinization lands does not stop growing. Therefore, it is important to determine the degree of used for afforestation breed stability at various stages of growth, including the early stages of development. The aim of this work was to assess the effect of different NaCl concentrations on germination, length, pigment content and proline of robinia pseudoacacia, which is one of the best potential breeds for successful afforestation, as well as to assess the possibility of using exogenous compounds (24-epibrassinolide and salicylic acid) to increase resistance to salt stress. The obtained data analysis showed that salt concentrations up to 100 mM inclusive are acceptable for the normal development of robinia pseudoacia seedlings in all studied indicators, including germination. In the groups where solutions with NaCl concentrations of 200 mM and higher were used for irrigation, a large difference was observed in comparison with the intact group in seed germination, but not in other studied indicators. When analyzing groups with phytohormone treatments, it was found that there was no protective effect from pre-soaking seeds in epin or salicylic acid solutions