摘要： 研究了超干向日葵种子老化后萌发过程的生理机制,结果表明,超干向日葵种子老化后鲜质量、发芽率、发芽指数及活力指数与未超干的相比均有显著变化;超干有利于向日葵种子活力的保持,且以含水量2.08%的超干种子各项指标提高幅度最大;随着种子的萌发,热稳定蛋白含量减少;超干的向日葵种子比未超干的MDA含量低,超干能有效地减少种子贮藏期间有毒物质的积累;超干的向日葵种子的抗氧化酶系统保持最好,减轻或阻止了活性氧启动的脂质过氧化作用,避免对膜系统的损伤,保证超干种子的正常萌发。

关键词: 向日葵, 种子, 含水量, 超干, 人工老化, 萌发, 热稳定蛋白, MDA, 抗氧化酶

Abstract: he physiolygical mechamisam study of ultradrying and aging sunflower seeds during germinating showed that fresh weight,germination percent,germination index and vigor indexof ultradried sunflower seeds were significant dif- ferent from ultradried after being aged;the ultradrying storage helped to keep the vigor of sunflower seeds and especially all indexes of ultradried sunflower seeds(MC = 2. 08 %)were improved most. With the germinatingof seeds,the content of heat-stable proteins decreased;MDA content of ultra-dried sunflower seeds were lower than that of unultradried ones;anti- oxidation enzyme systemof the seeds(MC = 2. 08 %)retained best,which alleviated or prevented the process of the super- oxidation of the inner membrane lipids started by active oxygen,avoided the harm to membrane system,ensured that seeds germinated smoothly.

Key words: Sunflower, Seed, Moisture content(MC), Ultradrying, Accelerated aging, Bourgeon, Heat 2 stable proteins, MDA, Anti 2 oxidation enzymes

中图分类号: 

• S565.5041