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The aim of this study was to verify the effects of application of H2O2 on salt tolerance and oil production in basil cv. ‘Gennaro de Menta’ grown in a hydroponic system. Seedlings were subjected to 3 levels of H2O2 (0, 1, and 1000 μM) in a nutrient solution during 2 different exposure periods (24 and 48 h) and 2 levels of NaCl (0 and 80 mM). The plants were harvested at preflowering (at 15 days) and postflowering (at 25 days). At 25 days, the application of 1 μM H2O2 /48 h and its reapplication at preflowering increased leaf dry mass production compared to the other salt treatments. Relative water content decreased while leaf succulence and sclerophylly index increased with salinity. |