Eco-physiological response mechanism of Tamarix chinensis to soil water changes in coastal wetlands of the Yellow River Delta

Elucidating the effect of soil moisture on adaptation dominant plants in coastal wetlands is important for predicting evolution vegetation region. In this paper, Tamarix chinensis , a species Yellow River Delta, was used as object to study changes its growth and physiological parameters with increasing salinity under different conditions (normal watering, persistent drought waterlogging). Different salt stress (2‰, 5‰, 8‰, 12‰, 16‰, 20‰) using pot experiments also reveal mechanism tolerance. The results showed that relative rate between 5‰-8‰ largest, significantly inhibited above 20‰. Among conditions, difference normal watering were nonsignificant, while both lower than those waterlogging. With salinity, water content total chlorophyll decreased, cell membrane permeability (malondialdehyde), sodium ion, osmoregulatory substances (proline, soluble protein), protective enzyme activity (SOD) increased, non-structural carbohydrates (NSC) not significant. Compared waterlogging, had lowest leaf content, ions, highest permeability, activity. treatment time, increased more NSC decreased drought. Correlation analysis relationships malondialdehyde various conditions. Under drough, positively correlated conductivity, superoxide dismutase, proline, protein sugar. Total key indicator reflecting waterlogging tolerance T. damage summary, has strong tolerance, but can have serious impacts survival.