摘要
竹类植物属禾本科竹亚科,由于其开花周期长,常常是几十年,多则百年以上,因而竹类开花甚属罕见。有关竹类花粉形态观察和萌发试验研究尚未见专门报道,植物花粉最富于保守性,形态比较稳定,是植物分类的一个重要性状。利用扫描电子显微镜进行花粉形态的观察研究对于竹子的分类研究将具有重要意义。竹子花粉的萌发试验,对于探讨竹子开花后结实率很低的原因以及进而实行杂交育种等研究将提供依据和参考。本文就今年所收集到的若干种鞭生竹类的花粉进行了形态观察和萌发试验结果报道如下。
13 species of bamboo pollen which belong to 4 genera were measured, the range of diameter is between 35.0-79.8μm. The diameters of the 6 species of bamboo pollen which belong to Phyllostachys are over 50 μm; these spores are of large size. Most of the bamboo pollen of Pleioblastus, Pseudosasa and Indosasa are of middle size spores with the diameters between 25-50 μmn. It was showed by electron microscope scanning that the shape of bamboo pollens is subsphaeroidal, each of the bamboo pollens has an approximate round germinal aperture with ring, the veins of the spore wall are granular or wart like, there are little differences between species. The germination percentage of the bamboo pollens in 5% sugar solution are 53.4% the most, 2% the least. Sugar solution is the suitable culture solution.Observation of electron microscope shows that the shape of bamboo pollen is similar to the pollens of grass family. It is the first time to found that the abortion and low germination percentage of bamboo pollen in general prove that the degeneration of sexual reproduction organ is one of the reason that bamboos have no seed after blossom or very low fruiting percentage.
出处
《林业科学研究》
CSCD
北大核心
1989年第1期67-70,共4页
Forest Research
关键词
竹子
花粉
萌发率
bamboo
pollen
germination percentage
