NaHCO_3胁迫对南蛇藤幼苗某些生理指标的影响

Effects of NaHCO_3 Stress on Some Physiological Indexes in Celastrus Orbiculatus Seedlings

对NaHCO3胁迫下南蛇藤幼苗叶片内超氧化物岐化酶(SOD)活性与丙二醛(MDA)含量、游离脯氨酸、可溶性糖的变化进行了研究.结果表明:南蛇藤幼苗经NaHCO3胁迫后叶内MDA含量明显升高,SOD活性逐渐升高,减少过氧化产物MDA的含量.受到NaHCO3胁迫后,脯氨酸和可溶性糖含量明显增加;随着胁迫时间的延长脯氨酸含量先升高后下降,可溶性糖正相反.叶内脯氨酸和可溶性糖含量的升高有助于提高它的抗盐碱性.

The changes of the activity of superoxide dismutase （SOD） and the contents of malondialdehyde（MDA）, free proline and soluble sugar of Celastrus orbiculatus seedlings under NaHCO3 stress were tested in this paper. The results showed that NaHCO3 stress led to obvious increase in MDA content and SOD activity. Under NaHCO3 stress, free proline and soluble sugar contents also increased obviously. With the increasing stress time, free proline content increased at first and then declined, while soluble sugar content was contrary to it. The increase in free proline and soluble sugar contents could contribute to NaHCO3 stress tolerance of Celastrus orbiculatus.