Interactive effect between sulfate and selenate on glutathione pool in garden rocket (<i>Eruca sativa</i>L.) leaves

Abstract

Garden rocket (Eruca sativa L.) plants grown in sand culture were irrigated with normal 1/10 Hoagland's medium [low sulfate (SO42−)] or with double SO42− concentration (high SO42−), each supplemented with 0, 2, 10 ppm SeO42− as sodium selenate for 30 days. Increasing SO42− concentration in the nutrient medium diminished SeO42− uptake, foliar hydrogen peroxide (H2O2), and MDA via enhancing the glutathione pool and their enzyme activities. These results showed that increasing SO42−/SeO42− ratio in nutrient medium of rocket plants played an important role in selenate detoxification.