水杨酸、壳聚糖和硝酸钙复配制剂对棉花幼苗抗寒性的影响

将水杨酸(SA)、壳聚糖(CS)和硝酸钙Ca(NO3)2· 4H2O]进行复配，采用室内盆栽试验，研究复配制剂(SCCaM)对棉花幼苗抗寒性的影响。结果表明：SCCaM预处理使低温胁迫下棉花幼苗叶片总叶绿素含量增加，同时显著降低相对电导率和丙二醛(MDA)的积累量，从而缓解了低温对质膜的过氧化伤害，并通过提高超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)等抗氧化酶的活性和可溶性蛋白、可溶性糖、脯氨酸等渗透调节物质的含量来适应低温环境。表明SCCaM对棉花幼苗有较好的抗寒效果。

Effects of SCCaM (Salicylic Acid, Chitosan and Calcium Nitrate Mixture) on Cold Tolerance of Cotton Seedling

In this paper, effects of salicylic acid, chitosan and calcium nitrate mixture (SCCaM) on cold tolerance of cotton seedling were discussed. The results showed that after pretreatment, SCCaM could increase the total chlorophyll content of cotton seedling, significantly reduce the accumulation of relative conductivity and malondialdehyde (MDA) of cotton seedling, which alleviated membrane peroxidation damage caused by low temperature. And cotton seedling could adapt to low temperatures better by increasing the activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and the content of osmotic adjustment substances such as soluble sugar, soluble protein and proline. The results indicated that SCCaM had good effect on cold tolerance of cotton seedling.