中国石蒜属植物花粉形态的研究

STUDIES ON THE POLLEN MORPHOLOGY OF THE GENUSLYCORIS IN CHINA

利用光学显微镜和扫描电镜对我国石蒜属ＬｙｃｏｒｉｓＨｅｒｂ．１１种植物花粉形态进行系统地研究，并对其中６种具有代表性植物花粉进行了透射电镜观察。该属植物花粉舟形或肾形；萌发孔为远极单槽；在光学显微镜和扫描电镜下观察，外壁具网状纹饰；在透射电镜下观察，外壁包括外壁－１和外壁－２两层，外壁－１是由半覆盖层、柱状层和基层组成，外壁－２很薄。根据花粉形态及其他器官特征，对本属植物分类地位也进行了一些讨论。

Pollen grains of 11 species of Lycoris from China were examined under light microscope and scanning electron microscope and thOse of 6 species of Lycoris were examined under transmis-sion electron microscope. Pollen grains of Lycoris of China are navicular or renifoimi5,(25-37.5) x(67.5-100)um in size,monocolpate.The exine is 2-lavered,1.3-2.5 um thick.The character of pollen grains of 11 species differs from each other in ornamentation,formation and width of muri,size of lumins,ratio of length of baculum and caput of pilum etc. The exine reticulate ornamentation under LM and SEM. The ektexine consists of semitectate.columellae and foot-layer under TEM. The ecdexine is very thin.The svstematic positions of Lycoris were discussed based on characteristics of pollen grains and other organs.