【摘要】 研究了不同浓度的水杨酸 (SA)对盐胁迫下小麦幼苗膜脂过氧化水平的调控作用。结果表明 :正常生长条件下施用 SA可提高 SOD、POD活性 ,叶绿素含量和光合速率 ,以 0 .0 1mg/ L效果最好 ,而对膜脂过氧化水平和电导率影响不大。盐胁迫下 SA不仅提高了 SOD、POD活性 ,叶绿素含量和光合速率 ,而且大大降低了膜脂过氧化水平 ,提高了膜的稳定性 ,进而提高了膜的抗盐性。低盐胁迫下 (10 0 mm ol/ L )以 SA0 .0 5最佳 ,高盐胁迫以 SA0 .1 0 最佳更多还原

【Abstract】 Regulation and controlling of SA to membrane lipid peroxidation of wheat seedlings under salt stress was studied. The results showed that: Under normal growth conditions, SA promoted the activities of SOD and POD, increased the content of chlorophyll, promoted the photosynthetic rate. SA 0.01 was most effective. But had little effect on membrane lipid peroxidation and relative leakage of membrane. Under salt stress, SA not only promoted the photosynthetic rate, but also decreased the content of MDA produced by lipid peroxidation, increased the relative permeability of membrane. Under light stress (100mmol/L NaCl), SA 0.05 was most effective; Under heavy salt stress (200mmol/L NaCl), SA 0.10 was most effective.更多还原