种子处理对玉米幼苗抗低温能力的影响

The Effect of Seed Treatment on the Resistanceto Low Temperature of Maize (Zea mays L.) Seedlings

在 10℃的冷环境中 ,6 - BA处理的玉米种子的幼苗 SOD酶活性、可溶性蛋白含量都较高 ,而 MDA含量较低。PEG处理的玉米种子的幼苗 SOD酶活性和 MDA含量较低 ,而可溶性蛋白含量较对照略高。人工老化 2 d的种子幼苗叶片中SOD酶活性较对照下降明显 ,但其 MDA含量高 ,可溶性蛋白含量较低 ,且变化幅度大。种子老化降低了玉米幼苗对低温的抵抗力 。

When maize seedlings were growing in 10℃ cold environment, their SOD activity and soluble protein content for the seeds treated by 1.0×10 -8 mol/L 6 BA were higher and their MDA content was lower. And the SOD activity and MDA content of the seedlings of the seeds treated by PEG were lower and their soluble protein content was higher. For the seeds aged 2 d, their seedlings showed lower SOD activity, higher MDA content, and significantly lower soluble protein content. Seed aging reduced the resistance to low temperature of maize seedlings. And all the treatments of improving seed vigor can enhance the resistance to low temperature of maize seedlings.