中文摘要：

以水稻中花11幼苗为材料，探讨高浓度NaCl处理对其根系生长发育的影响。结果表明，200mmol／L NaCl胁迫下，幼苗胚根生长受到抑制，不定根数目减少，根毛数量减少长度变短；幼苗根系出现褐化，且根系木质素含量增加，根系过氧化物酶（POD）活力显著上升；半定量RT-PCR检测显示，盐胁迫应答基因OsCDPK7表达显著下降，P5CS1表达上升，OsHKT1；5、OsNHX1在处理初期表达上升，其后随处理时间延长而下降。

英文摘要：

With rice （ Oryza Sativa L. subsp, japonica cv. zhonghua 11 ） seedlings as experimental material, analysed effects of high-concentration NaCI stress on their root growth and development. The results indicate that under 200 mmol/L NaCl treatment, roots became browning, main root growth was inhibited, adventitious root number and root hair amount was decreased;but the root lignin content and peroxidases （POD） activities increased. Semi-quantitative RT-PCR showed OsCDPK 7 expression was inhibited in salt-treated seedlings, while P 5 CS 1 was upregulated, and the accumulation of OsHKT 1 ; 5 and OsNHX 1 transcripts increased in early treatment period, then downregulated.