鸢尾属部分种种子微形态特征与系统演化关系

用HITACHI S-520型扫描电子显微镜对鸢尾属植物10个种及1变种、1外类群的种子微形态进行观察、比较分析，探讨了鸢尾属植物部分种种子微形态特征分类学意义及系统演化关系。结果表明：鸢尾属植物种子表面微形态特征具有种的稳定性，与分布区无关；同一种的种子凹、凸面微形态差异很大，同一类群比较时应选择相同部位观察。所研究的鸢尾种都为网状（网纹或负网纹）文饰，种间差异明显，微形态特征可用于鸢尾属间、属下系的等级划分，但不适于种下等级鉴别。研究给出了鸢尾属植物种子表面纹饰的系统进化关系，证明了种子表面微形态对鸢尾属植物分类及系统演化关系具有重要意义。

The relationship between seed coat micro-morphology characteristics and systemic evolution of some species of Iris

Micro-morphology characteristics of ten species,one variation and one outgroup species of Iris were studied,also discussing the relationship between the micro-morphology of seed surfaces and the evolution of Iris.The results showed that seed coat micro-morphology had the stable characteristics,which was not relative to the distribution zone.The characteristics of concave and convex surface micro-morphology of a species were different significantly.Therefore,we should choose the same spot of the seeds for comparison observation.All of species were reticulate grain(reticulate grain or negative net grain).Micro-morphology characteristics can be used to classify genus and series of genus,but not for variations.The characteristics of micro-morphology of seed surfaces were very important for classification and systemic evolution of Iris.