Galactinol synthase (GolS) is a key biological catalyst for the synthesis of the raffinose oligosaccharides (RFOs) which play important roles in abiotic stress adaptation of plants, especially drought tolerance. GolS gene has been isolated on a variety of plants in order to create material resources for generating transgenic plants resistant to adverse environmental factors. | Expression of oryza sativa galactinol synthase gene in Maize (Zea may L.)