摘要： 利用透射电子显微镜对小麦单核期、双核期小孢子和单核期花药壁对高温的敏感性研究表明：小麦单核期花药中小孢子和绒毡层细胞对高温（45℃）最敏感，处理仅10min就可引起细胞内线粒体等细胞内膜系统破裂或破碎，而花药表皮内壁和中层需高温处理30min才能发生相同的超微结构变化，随着小孢子的发育，其对高温的敏感性下降，发生相似变化的高温处理时间为30min。

关键词: 小麦, 花药, 高温, 超微结构

Abstract: The sensitive response of wheat sproes in uninucleate and binucleate stage as well as anther wall in uninucleate stage to short-termhigh temperature were studied by using transmission electron microscope.The results showed that the uninucleate spore and tapetum cell were most sensitive tohigh temperature of 45 ℃and the cell membranes such as mitochondria membrane might get broken by ten-minute treatment of that temperature, while anther epidermis, endothecium and middle layer must be treated for 30 minutes to get the similar ultrastructural changes. The spores turned less sensitive tohigh temperature with their development and the spores at binucleate stage also need 30 minute treatment ofhigh temperature to get the similar ultrastructural changes.

Key words: Wheat, Anther, High temperature, Ultrastructure

中图分类号: 

• S512.101