甘肃南部地区10份野生沿阶草种质资源耐盐性综合评价

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Abstract： To investigate the salt tolerance of 1O 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 poting 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 1O 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 Ophiopogon angustifoliatus （Wudu） and Liriope graminifolia （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

土壤盐渍化是一种盐分在地表大量积累的现象，主要是由于地表干旱缺水使土壤底层水中的盐分上升到地表形成的[1。（剩余17594字）