The present invention relates to a use of Oryza sativa-derived AK102606 gene as a controller for antioxidative activity, environmental stress, and crop yield. A plant transformed with the AK102606 gene of the present invention exhibits high antioxidative activity, excellent tolerance to environmental stresses, notable initial growth, and high crop yield. Thus, the introduction of AK102606 gene into valuable crops can be advantageously used to develop plants superb in terms of antioxidative activity, abiotic stress, and crop yield.
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