GERMINATION AND IN VIVO AMINO ACID BALANCE STRATEGIES OF OAT (Avena sativa) SEEDS UNDER SALINEALKALI STRESS SIMULATED WITH NaCl AND NaHCO3

The current experiment was investigated to determine the effect of saline -alkali stress on germination indices and amino acid concentrations of Avena sativa.The study was comprised of different levels (0, 50, 100 and 200 mmol L -1 ) of salinity (NaCl) and alkaline (NaHCO3) stress.The seeds were subjected to stress treatments and the changes in biological and physiological indices of oat seedlings were determined.The results showed that the biological indices of oat seed germination had some regularity in response to salinity stress.The increasing salts concentration decreased germination rate, germination potential, germination index, vigor index length of germ and radicle, biomass and water content of germ and radicle.Further, both stresses also changed the concentration of different amino acids.Therefore, saline -alkali stress can reduce the germination and seedling vigor of Avena sativa.The present study provides reference for the selecting the oat seeds to be grown on saline-alkali soils.