冬小麦越冬期茎尖超微结构变化与玉米赤霉烯酮的关系

应用酶联免疫技术和电镜技术，研究了冬小麦品种燕大１８１７越冬期内源玉米赤霉烯酮（ＺＥＮ）含量和茎尖超微结构的变化，结果表明，随着秋末冬初气温逐渐降低，日照缩短，茎尖ＺＥＮ含量逐渐增加，１１月下旬含量达到高峰，随后急剧下降，到１月下旬又出现一个小的含量高峰。在小麦茎尖ＺＥＮ含量出现高峰前后（１１月底，１２月初），茎尖细胞中线粒体和质体的体积增大，形状也发生变化，线粒体从低温诱导前的圆球形变为长形、哑

The Relationship Between Ultrastructural Changes and Zearalenone in Triticum aestivum L. During Overwintering

The cell ultrastructure and ZEN levels in shoot apex of Triticum aestivum L.cv. Yan Da 1817 during overwintering were studied by electron microscopic technique and immunosorbent assays. The results showed that: in natural condition, there were two peaks of zearalenone(ZEN) contents in shoot apex of winter wheat. They appeared at the end of Oct. and Jan. respectively. As the temperature decreased in the late autumn and early winter, the mitochondria and plastids in shoot apical cells increased in size and changed in structure, the nuclear pores were open. The internal structures in mitochondria and plastids increased obviously during appearance of the second peaks of ZEN content.