The aim of the present research was the evaluation of the effects of sea water irrigation on the antioxidant properties and qualitative characteristics of
tomato. The berries of plants grown with 0, 10 and 20% of sea water, corresponding to conductivity values of 3, 8, 14 mS/cm, respectively, were harvested
at two growth stages, green and red-ripe. Increasing water salinity resulted in reduced crop water consumption, plant growth, fruit and crop yield, whereas
it caused an increase in fruit quality. Titrable acidity, osmotic pressure and concentration of sodium, sugars and organic acids increased upon irrigation with
saline water, whereas K content increased only at 14 mS/cm EC. The antioxidant capability was evaluated by the analysis of reduced/oxidised ratios of the
major antioxidants: the reduced pool of ascorbate suggested a favourable response of tomato fruits, and the determinant role of GSH in the behaviour of total
glutathione content was pointed out. Finally, the trend of APX activity testified the increased requirement of active oxygen species scavenging under
salinisation.
The aim of the present research was the evaluation of the effects of sea water irrigation on the antioxidant properties and qualitative characteristics oftomato. The berries of plants grown with 0, 10 and 20% of sea water, corresponding to conductivity values of 3, 8, 14 mS/cm, respectively, were harvestedat two growth stages, green and red-ripe. Increasing water salinity resulted in reduced crop water consumption, plant growth, fruit and crop yield, whereasit caused an increase in fruit quality. Titrable acidity, osmotic pressure and concentration of sodium, sugars and organic acids increased upon irrigation withsaline water, whereas K content increased only at 14 mS/cm EC. The antioxidant capability was evaluated by the analysis of reduced/oxidised ratios of themajor antioxidants: the reduced pool of ascorbate suggested a favourable response of tomato fruits, and the determinant role of GSH in the behaviour of totalglutathione content was pointed out. Finally, the trend of APX activity testified the increased requirement of active oxygen species scavenging undersalinisation.
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