Antioxidant systems from Pepper (Capsicum annuum L.): involvement in the response to temperature changes in ripe fruits.

摘要: Sweet pepper is susceptible to changes in the environmental conditions, especially temperatures below 15 °C. In this work, two sets of fruits (Capsicum annuum L.) which underwent distinct temperature profiles planta were investigated. Accordingly, harvesting times corresponding each set established: Harvest 1, whose developed and ripened at 14.9 °C as average temperature; 2, with 12.4 The oxidative metabolism was analyzed all fruits. Although total ascorbate content did not vary between Harvests, a shift from reduced oxidized form (dehydroascorbate), accompanied by higher peroxidase activity, observed 2 respect 1. Moreover, decrease ascorbate-generating enzymatic system, γ-galactono-lactone dehydrogenase, found 2. activity values NADP-dependent dehydrogenases seem indicate that lower NADPH synthesis may occur conditions. spite important subjected temperature, no stress appears occur, indicated lipid peroxidation protein oxidation profiles. Thus, antioxidative systems be involved response against changes.