[A preliminary study on gene expression profile induced by water stress in wheat (Triticum aestivum L.) seedling]

In the present research, suppression subtractive hybridization (SSH) and high density membrane techniques were employed to analysis genes induced by water stress in wheat seedling at 2-leaf stage. The purpose was to comprehensively understand the genetic bases of drought resistance and to find the key genes related to drought resistance in wheat. A total of 181 positive clones were obtained by screening the SSH library including 1 530 individual recombinant clones. The result of the sequence homologous comparison and function querying showed that 83.2% differentially expressed genes were high homologous with those induced by abiotic or biotic stresses in plant and their functions were to protect the cell directly or indirectly from stress strain. Seventeen differentially expressed ESTs found first were registered in GenBank. After further identifying by reverse Northern, RT-PCR and Northern, the gene expression profile induced by water stress in wheat seedling was preliminarily revealed.