Two winter wheat cultivars differing in drought resistance (Taiyuan 633, drought-tolerant; C609, drought-sensitive) were used to study the changes in protein synthesis and the relation between these changes and drought resistance of plants under the water stress. The results of two-dimensional PAGE-SDS-PAGE electrophoresis showed that water stress(-2.0MPa) caused obvious differences of protein changes in leaves of two winter wheat cultivars. The water-stress-induced protein in Tai Yuan 633 presented earlier than that in C609. The results indicated that there was a close connection between the proteinchanges in drought-tolerant and drought sensitive cultivars caused by water stress and thetime of water stress. After rewatering the protein changes could recover immediatly. The experiment of using the inhibitor showed that the emergence of the water-stress-induced proteins could be inhibited. The results implied that the gene expression of the proteins relating to adaptation to water stress was regulated mainly at transcriptional level.
Acta Agriculturae Boreali-Sinica