萌发玉米种子脱水耐性与胚根细胞超微结构的变化  

Changes in Radicle Cell Ultrastructure of Germinated Zea mays Seeds during Desiccation

作　　者：伍贤进[1] 宋松泉[2] 田向荣[2] 类延保[2] 傅家瑞[2] 

机构地区：[1]怀化学院生物工程系,湖南怀化418008 [2]中山大学生命科学学院,广东广州510275

出　　处：《热带亚热带植物学报》2004年第5期467-470,共4页Journal of Tropical and Subtropical Botany

基　　金：湖南省教育厅科研项目(02C296);国际植物遗传资源研究所(IPGRI00/076)

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 

分 类 号：S513[农业科学—作物学]