12种百合属植物花粉形态扫描电镜观察

应用扫描电镜对百合属4个野生种和8个栽培品种的花粉形态进行了观察和比较。结果表明,12个百合品种中4个野生种(细叶百合、兰州百合、卷丹和大花卷丹)和4个栽培种(布鲁赛尔、普瑞头、多安娜和红骑士)的花粉粒形状为椭球体,另外4个栽培种(阿尔格夫、耶罗林、萨莫和西伯利亚)为长椭球体。脊宽为1.20~2.78 μm,多由盘珠状颗粒或瘤状颗粒组成;网眼大小2.11~7.66 μm,多为不规则多边形至近圆形,大小不一,部分有刺状或粒状突起,少数无突起。大花卷丹和红骑士花粉的表面纹饰为单、双排基柱并存网纹,其他10个品种均为单基柱网纹。花粉粒均以单粒形式存在,极面观为椭球体,赤道面观为舟形,具单沟萌发孔,沟长达两端。通过对12个百合品种花粉形态特征比较及聚类分析表明,细叶百合与兰州百合、卷丹与大花卷丹、阿尔格夫与萨莫、普瑞头与多安娜亲缘关系较近,12个种大致可以划分为3大类群。

SEM observation on pollen morphology of 12 lily species

Pollen morphologies of 12 lily species(including 4 wild and 8 cultivated species) were examined by scanning electron microscopy(SEM).The pollen shapes of 4 wild(Lilium pumilum,L.davidi,L.lancifolium and L.leichtlinii var.maximowiczii) and 4 cultivated(Brunello,Prato,Pollyanna and Red knight) lily species were elliptic balls,while those of the other four cultivars(Algarve,Yelloween,Samur and Siberia) were a long ellipsoid.Most mesh ridges of the pollen from the 12 species were composed of particles or tumors...