麻竹花粉发育过程观察及其分期

以麻竹为材料,采用醋酸洋红、碘-碘化钾压片以及石蜡切片的观察方法对麻竹花粉发育全过程进行了研究,初步将这一过程划分为8个时期,即小孢子母细胞形成期、小孢子母细胞减数分裂期、小孢子早期、小孢子中期、小孢子晚期、二胞花粉早期、二胞花粉晚期和成熟花粉期,并描述了各个时期的基本特征。麻竹花粉发育过程基本正常,小孢子母细胞减数分裂为连续型,四分体主要为左右对称型,也有四面体形的,成熟的花粉为3-细胞型,具单一萌发孔。

Pollen Development of Dendrocalamus latiflorus and Its Stages

By using the techniques of aceto-carmine squash, iodine potassium iodide squash and paraffin section, an extensive and cytological observation was conducted on the pollen development of Dendrocalamus latiflorus Munro. The results showed that the whole developmental process could be primarily divided into eight stages, i.e. microspore mother cell formation stage, microspore mother cell meiosis stage, early microspore stage, middle microspore stage, late microspore stage, early bicellular pollen stage, late bicellular pollen stage and mature pollen stage. The major characteristics of every stage are reported. It was showed that the cytokinesis of the microspore mother cells in meiosis was successive and the microspore tetrads were isobilateral or tetrahedral. The mature pollen grains were three-celled and mono-aperturate.