Evaluation of Setaria viridis responses to salt treatment and potassium supply: a characterization of three contrasting accessions

Saline stress affects plants’ performance, causing change at the morphological and physiological levels. Several genotypes have developed mechanisms to face salinity, avoiding or tolerating it. Potassium supply is considered an advantageous strategy reduce salt injury improve plant tolerance. In this study, we used three accessions (A10.1, ME034V Ast-1) of Setaria viridis (L.) P.Beauv., a C4 model plant, evaluate responses upon exposure two saline conditions (150 250 mM NaCl) potassium (5 KCl) for 96 h in roots. Based on parameters evaluated (number length roots, dry mass electrolyte leakage), found negative effect NaCl root morphology growth. affected mainly crown roots from S. viridis, but lesions leaves, such as depigmentation necrosis, were also observed. improved most plants under moderate NaCl), was not able mitigate effects severe condition (250 NaCl). Interestingly, analyses shoots allowed us identify accession Ast-1 more sensitive than A10.1 ME034V. The data presented here corroborate previous findings about acting efficient salinity. contrasting among can be better understand plasticity salinity tolerance develop tolerant crops.