论文部分内容阅读
赤松(Pinus densiflora)是我国北方主要用材和绿化树种之一。研究赤松从花粉母细胞减数分裂至花粉粒成熟的过程和规律,了解这一过程中各主要发育阶段细胞学和形态学间的相关关系,对研究赤松有性生殖和遗传过程,指导赤松育种工作具有一定的理论价值和实践意义。为此,作者于一九八一年四月下旬至五月下旬,对赤松从花粉母细胞减数分裂至花粉成熟的全部过程进行了系统的观察。
Pinus densiflora (Pinus densiflora) is one of the main timber and tree species in northern China. To study the process and law of meiosis of pollen mother cells from pollen mother cells and maturity of pollen grains, to understand the relationship between cytology and morphology at all major developmental stages in this process. To study the sexual reproduction and genetic process of Pinus densiflora, Work has a certain theoretical value and practical significance. Therefore, from late April to late May 1981, the author systematically observed the whole process of the meiosis of pollen mother cells from the pollen mother cells to pollen maturation.