作　　者： ; ; ; ; ;

机构地区： 怀化学院生命科学系

出　　处： 《热带亚热带植物学报》 2004年第5期467-470,共4页

摘　　要： 玉米种子脱水试验表明,25℃下萌发24h种子脱水耐性开始丧失,丧失50%和100%的时间分别为33h、58h。萌发过程中随着吸胀时间增加,玉米种子脱水耐性逐步丧失。显微观察显示,种子吸胀过程中,胚根细胞的贮藏物质逐步减少,线粒体等细胞器的分化程度则不断提高,尤其是脂类物质的分解程度与脱水耐性变化的关系似乎更明显。 Germinated maize (Zea mays) seeds were used for desiccation tolerance experiment. The seeds started to lose desiccation tolerance at 25℃ after germination for 24 hours. The loss of desiccation tolerance reached 50% and 100% after 33 and 58 hours, respectively. Ultrastructure observation showed that the reserve substances especially lipids in radicle cells decomposed gradually during treatment, while organelles such as mitochondria were well differentiated.

关 键 词： 玉米种子 萌发 脱水耐性 超微结构

领　　域： [生物学]