Responses of Peppermint and Spearmint Crops to Excessive Biostimulant Application and Increased Salinity in a Closed Soilless Production System

A floating system was established in a heated glass greenhouse order to investigate whether the effect of amino acids (0.25 or 0.50% commercial acid (AA) solution Amino16®) during peppermint and spearmint production on plant developmental nutritional status may be part attributed salinity induced osmotic stress. For this reason, some nutrient solutions, three levels were by adding 0, 10, 20 mM NaCl. According results, it can concluded that is mostly favored highest supplement (0.50%) terms substantial improvement antioxidant quality (by up 130%) at expense reduced biomass <30%). Enzymic defense mechanism (APX POD) efficiently activated, preventing severe lipid peroxidation accumulation reactive oxygen species such as H2O2 maintaining proline content normal levels. The stress excessive AA concentration confirmed chlorophyl fluorescence variations probably related NH4+ excess supply growing media not associated with elevated electrical conductivity solution. absence any adverse stressful consequences upon addition NaCl high salt tolerance species.