Accumulation of Low-Molecular-Weight Compounds in Plants in Response to Technogenic Soil Salinization

In south-taiga conditions, the plant community developing on a technogenically salinized alluvial soil is represented by ruderal species from the local flora. It was found that species-specific reactions of plants to progressive soil salinization are manifested in the accumulation of low-molecular-weight compounds: oak-leaved goosefoot ( Chenopodium glaucum L.) accumulates proline and glycine betaine; spear saltbush ( Atriplex patula L.), proline; weeping alkaligrass ( Puccinellia distans (Jacq.) Parl.), flavonoids; and toad rush ( Juncus bufonius L.), glycine betaine. On acidic saline soils, an elevated proline content was recorded in spear saltbush leaves, and the accumulation of flavonoids was noted in weeping alkaligrass.