Abstract: To investigate the salt tolerance of 10 wild Ophiopogoneae germplasm resources in Longnan and Tianshui areas of Gansu Province， five soil salt content gradients （0%， 0.25%， 0.50%， 0.75% and 1.00%） were set up with NaCl∶Na₂SO₄=1∶1， the effects of salt stress on the growth， cell membrane system and osmoregulation process of Ophiopogoneae were explored by potting simulation method， and their salt tolerance was comprehensively evaluated. The results showed that with the increase of salt stress， the relative conductivity， free proline content， soluble sugar and sodium ion content of the 10 Ophiopogoneae germplasm resources showed an upward trend， the content of malondialdehyde and soluble protein increased first and then decreased， and the root activity， relative water content， potassium and calcium ion contents showed a downward trend. The comprehensive evaluation showed that the two germplasms of Ophiopogonangustifoliatus （Wudu） and Liriopegraminifolia （Wudu） had strong salt tolerance， which had the potential to be cultivated in the salinized areas of the soil in the northwest China.

Key words: Ophiopogoneae, Salt stress, Salt resistance, Comprehensive evaluation

摘要： 为研究甘肃陇南、天水地区10份野生沿阶草（Ophiopogoneae）种质资源耐盐性强弱，本试验以NaCl∶Na₂SO₄=1∶1设5个土壤含盐量梯度（0%，0.25%，0.50%，0.75%，1.00%），采用盆栽模拟法，探究盐胁迫对沿阶草生长、细胞膜系统及渗透调节过程的影响，并对其耐盐性进行综合评价。结果表明：随着盐胁迫程度增加，10份沿阶草种质资源的相对电导率、游离脯氨酸含量、可溶性糖及钠离子含量呈上升趋势，丙二醛和可溶性蛋白含量呈先上升后降低趋势，根系活力、相对含水量、钾离子和钙离子含量呈下降趋势。综合评价表明，麦冬（武都）和短药沿阶草（武都）2份种质耐盐性更强，具有在西北土壤盐渍化地区种植的潜力。

关键词: 沿阶草, 盐胁迫, 耐盐性, 综合评价