冬小麦幼苗根系适应土壤干旱的生理学变化

Physiological Adaption of Winter Wheat Seedling’s Root to Soil Drought

采用盆栽试验对冬小麦幼苗根系适应土壤干旱的生理学变化进行了初步研究。结果表明,随干旱胁迫的加剧,洛麦9133和济麦21幼苗根水势、根相对含水率和根系活力均降低,饱和亏、可溶性糖含量、脯氨酸含量、质膜透性以及SOD、POD活性均呈增加趋势。这说明,在干旱胁迫下,冬小麦幼苗根系通过降低水势、相对含水率和根系活力,增加渗透调节物质可溶性糖、脯氨酸含量和增强SOD、POD活性等生理上的变化以提高抗旱性,从而使冬小麦幼苗适应干旱逆境。

Deals with the physiological adaption of winter wheat seedling＇ s root to soil drought. The resuits showed that root water potential, root RWC and root activity decreased with soil water decreasing, and root WSD, soluble sugar content, proline content, the permeability of plasma membrane, and SOD activity, POD activity in root of Luomai 9133 and Jimai 21 increased with soil water decreasing. In conclusion, winter wheat seedling＇ s root increased drought-resistance by physiological changes in root, such as water potential, RWC and root activity reduced, soluble sugar content and prohne content increased, and SOD and POD activity enhanced, etc. On the basis of above physiological changes in root, winter wheat seedling adapted to soil drought.