摘要
分别用浓度为25mmol/L、50mmol/L、100mmol/L和200mmol/L的NaCl、Na2SO4和Na2CO3的营养液培养小麦4d,较之不含盐的营养液,其自由基含量上升,产生速率增加,叶片质膜透性增加。不同盐的影响也不同,在低浓度时,NaCl的影响大于Na2SO4,高浓度时,NaCl影响小于Na2SO4,Na2CO3的影响最为显著。实验结果也表现出小麦叶片自由基含量和质膜透性呈现较好的相关性。因此可认为,盐胁迫促使自由基含量增加,自由基通过过氧化作用影响质膜透性,从而影响植物的生长。
Wheat seedlings (4 days old) were treated with Hoagland solution contained NaCl,Na 2SO 4 and Na 2CO 3 with the concentrations of 25 mmol/L,50 mmol/L,100 mmol/L and 200 mmol/L. The content of the organic free radical and the rate of production of the superoxide radical in the leaves of the wheat incveased and the membrane leakage increased too. Under the stress of low concertration, the effect of NaCl is greater than that of Na 2SO 4, but under the stress of the high concertration, the effect is contrary. The effect of Na 2CO 3 is the greatest. The results showed the good relationships existing between the content of free radical and membrane leakage of wheat leaves. The results showed that the salt stress the increase of the content of free radical, then the free radical affected the membrane leakage through the peroxidation and finally the growth of the wheat was affected by salt stress.
出处
《植物学通报》
CSCD
1998年第A00期82-86,共5页
Chinese Bulletin of Botany
基金
国家九五科技攻关计划