盐碱胁迫对甘草渗透及pH调节物质的影响

Effects on Osmotic and pH Adjustment Substances of Glycyrrhiza uralensis Fisch to NaCl and Na_2CO_3 Stresses

以药用植物甘草为材料。采用砂基培养法培养幼苗,以含有不同浓度的NaCl或Na2CO3的营养液对其分别进行不同强度的盐胁迫或碱胁迫处理。结果表明,随盐浓度的增加,甘草渗透及pH调节物质积累,Na+、脯氨酸、柠檬酸含量增加,K+含量下降。在相同[Na+]胁强下,碱胁迫下的胁变反应均比盐胁迫强烈。

Medicinal plant Glycyrrhiza uralensis Fisch was taken as the material. Seedlings of sand-cultured were stresSed with different concentration of NaCl and NaECO3. The results showed that with the increase of concentration of NaCl and Na2CO3,the contents of Na^＋, proline and citric acid were increased while K^＋ concentration was decreased. Under the stress of the same concentration of Na^＋, the stress reaction of alkali stress was more seriously than that of the saline stress.