摘要
对于新疆分布的菊科（Ｃｏｍｐｏｓｉｔａｅ）千里光族（Ｓｅｎｅｃｉｏｎｅａｅ）４属２０种植物果实解剖结构的研究表明：（１）各属果皮结构上存在差异，如果皮细胞的层数、果棱的突起程度、厚壁细胞的分布等特征，为该族的系统演化研究提供了新的资料。（２）由果实的解剖结构推测该族的演化，趋势可能是：吾属（Ｌｉｇｕｌａｒｉａ Ｃａｓｓ．）→千里光属（Ｓｅｎｅｃｉｏ Ｌ．）→多榔菊属（Ｄｏｒｏｎｉｃｕｍ Ｌ．）→款冬属（ＴｕｓｓｉｌａｇｏＬ．）。（３）吾属和千里光属是近缘属。（４）希氏勇吾（Ｌ．ｓｃｈｉｓｃｈｉｎｉｉ Ｒｕｂｔｚ）应作为一个独立的种来处理。
The fruit anatomy structures of 4 genera 20 species of Trib.Senecioneae (Compositae) in Xinjiang were observed in this studies.The results show:1. The differences between the pericarp structures of these genera,such as the cell stratification,the protruding degrees of fruit ribs,the distribution of sclerenchyma and other features, provide new information for the study of the systematic evolution of this Trib..2. According to the fruit anatomy structures, the evolutionary tendency of the Trib.was supposed to be like this: Ligularia Cass.→Senecio L.→Doronicum L.→Tussilago L..3. Ligularia Cass.and Senecio L. are close relative genera.4. L.schischkinii Rubtz.should be an independent species.
关键词
果实
解剖
系统分类
千里光族
新疆
fruit anatomy
systematic classification
Senecioneae
