【摘要】 以异裂菊属(Heteroplex Chang)5个种的花粉和叶片为试验材料,采用扫描电镜技术对其微形态特征进行了观察分析。结果表明,异裂菊属的5个种中,小花异裂菊、异裂菊、凹脉异裂菊、柳州异裂菊4个种的花粉为近球形,绢叶异裂菊为长球形;5个种外壁都有明显的刺状突起,小花异裂菊、绢叶异裂菊的刺长和刺基部直径都较大;凹脉异裂菊和柳州异裂菊上表皮无腺毛或附属物;绢叶异裂菊上表皮分布有较长、较密集的腺毛,小花异裂菊和异裂菊上表皮分布相对较少的附属物;异裂菊属植物叶下表皮纹饰集中在气孔器周围,呈辐射状,气孔器为椭圆形,内部纹饰为浅波状;小花异裂菊下表皮无附属物或腺毛,异裂菊则下表皮分布有乳状附属物;凹脉异裂菊、柳州异裂菊和绢叶异裂菊3个种下表皮分布有腺毛;异裂菊属植物叶片表面微形态特征表现出良好的种间差异性。更多还原

【Abstract】 Using the pollen and leaves of Heteroplex Chang as the materials,scanning electron microscopy(SEM) was used to observe and analyze its micromorphological characteristics. The results showed that the pollen grains of H.microcephala, H.vernonioides, H.impressinervia and H.incana were subglobose, and H.sericophylla was prolate. There were obvious thorn prominence on the outer wall of the pollen of the five species, the thorn length and the base diameter of H.microcephala and H.sericophylla were the large, H.impressinervia and H.incana had no glandular hairs or appendages on the adaxial epidermis.H.sericophylla had longer and denser glandular hairs in the adaxial epidermis, while H.microcephala and H.vernonioides had appendages. The epidermis ornamentation of the leaves of Heteroplex was concentrated around the stomatal apparatus in a radial shape, the stomatal apparatus was elliptical, and the internal ornamentation was shallow wavy. There were no appendages or glandular hairs in the abaxial epidermis of H.microcephala, while emulsus appendages were distributed in the abaxial epidermis of H.vernonioides. Glandular hairs were distributed in the epidermis of H.impressinervia, H.incana and H.sericophylla.The micromorphological characteristics of the leaf surface showed good interspecific differences.更多还原