The content of starch in root cap decreased with the increase of osmotic stress in all cultivars, and the decrement was lower in drought-resistant cultivars than that in drought-sensitive cultivars.

• 随着渗透胁迫程度的加重,各品种小麦根冠淀粉粒均有不同程度的减少,而抗旱性强的品种根冠淀粉粒的减少程度小于抗旱性弱的品种;