移栽于蛭石中长至 4～ 5片新叶的马铃薯试管苗用 0 2 %、 0 4 %、 0 6 %浓度的NaCl溶液进行胁迫处理 ,在 10d、 2 0d和 30d时测定各项生理指标。结果表明 :随盐胁迫浓度和时间的增加 ,马铃薯试管移栽苗生长受到明显抑制 ;脯氨酸含量在胁迫初期极显著地增加 ,随后呈下降并趋于稳定趋势 ;叶绿素含量、光合速率、气孔导度极显著地下降 ,细胞间隙CO2 浓度无变化。 Potato plantlets that grew 4 to 5 new leaves transplanted in vermiculite were treated with 0,2%, 0,4% and 0 6% NaCl stress solutions. Physiological measurements were made at 10 days, 20 days and 30 days index. The results showed that with the increase of salt concentration and time, the growth of potato seedlings was obviously inhibited. The content of proline increased significantly at the early stage of stress, then decreased and tended to be steady. The content of chlorophyll, photosynthetic rate, Conductivity dropped significantly, with no change in intercellular CO2 concentration.