锦葵科植物花粉壁的透射电镜观察

TEM observation of the pollen exine of Malvaceae plants

本文报道了运用超薄切片法对锦葵科(Malvaceae)七种植物花粉外壁进行透射电镜观察的结果。花粉外壁一般具有两个不同电子密度的层次,电子密度低的是外壁内层,电子密度高、具有结构的部分是外壁外层;内壁内层为无分化结构的板状层。外壁较厚,由外壁内层、柱状层和覆盖层组成。但七种花粉壁的微结构不同。本工作结果表明,运用超薄切片法可以在透射电镜下观察花粉壁的层次、结构、纹饰和萌发孔,也可以看出,不同属种花粉壁的构造是不同的。

In this paper, the exine ultrastructure of seven kinds of pollen grain of malvaceae, was examined by ultra-thin sectioning technique in Transmission Electron Microscope. The results showed that layers of exine, struc-ture of exine, pentreme of exine and aperture can be examined with Transmission EIectron Microscopy. The ex-ine ultrastructure of various pollen grains was different.