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采用水培方法研究外源Ca2+对海水胁迫油菜幼苗生长和其叶中抗氧化酶活性的缓解效应的结果表明,30%的海水显著抑制油菜幼苗生长;适宜浓度的外源Ca2+可以有效缓解海水对油菜的胁迫作用,即油菜种子的发芽率、苗高和鲜重以及叶中叶绿素含量均增加,丙二醛(MDA)含量下降,超氧化物歧化酶(SOD)和过氧化物酶(POD)活性维持较高水平;较高浓度的Ca2+则抑制油菜幼苗的生长;缓解海水胁迫油菜的适宜Ca2+浓度为10￣20mmol·L-1。
The results of hydroponics experiment showed that exogenous Ca2 + could alleviate the growth of rapeseed seedlings and the activities of antioxidant enzymes in seawater under the stress of seawater. The results showed that 30% seawater significantly inhibited the growth of rapeseed seedlings. Exogenous Ca2 + The rapeseed stress, that is, the germination rate, seedling height and fresh weight, the chlorophyll content in leaves, the content of malondialdehyde (MDA) and the content of superoxide dismutase (SOD) and peroxidase (POD) The higher concentration of Ca2 + inhibited the growth of rapeseed seedlings and the suitable Ca2 + concentration of 10-20 mmol·L-1 to alleviate seawater stress.