山茶属植物花粉粒生殖细胞形态研究

Morphological Studies on Generative Cells in Pollen Grains of Genus Camellia

用光学显微镜对茶组、油茶组和红山茶组植物共10份材料的花粉粒生殖细胞进行了形态观察。结果表明,山茶属植物花粉粒中含有生殖细胞和营养细胞,生殖细胞较小,呈长纺锤形,游离在营养细胞中,生殖细胞极轴两端的细胞膜和核膜与营养细胞的细胞膜相连,其中一端的连结处位于花粉粒萌发孔附近。生殖细胞核长3.5-20.0μm,形状有长棒状、较长棒状、短棒状、近楔形和楔形5种类型。笔者探讨了光学显微镜下观察山茶属花粉粒生殖细胞形态的方法,并根据山茶属植物花粉粒生殖细胞核的形状及大小变化,对其演化的趋势进行了讨论。

Morphology of generative cells in pollen grains of 10 plants of Sect.Camellia and Sect. Oleifera was observed with LM.Results showed that there were vegetative cell and generative cell in the pollen grain of Genus Camellia, the generative cell is more smaller than that of the vegetative cell.The generative cell was lay on the vegetative cell as an elongate spindle, and only the generative cell membrane and nuclear membrane which near the cell polar linked up the vegetative cell membrane, one of the linked area was located near by the aperture of pollen grain. The nuclei of generative cells showed five types of morphological characters: more elongate club, elongate club, short club, approximate wedge-shaped and wedge-shaped. The length of generative cell nuclei is 3.5-20.0μm.study method on morphology of generative cells in pollen grains, and the evolutionistic tendency of Genus Camellia base on the morphological character and size of generative cell nuclei was also discussed in this paper.