黑龙江省4种老鹳草属植物的花粉形态研究

Study on Morphology of the Pollen of 4 Species from Geranium in Heilongjiang Province

使用光学显微镜和扫描电镜对黑龙江省分布较多的四种老鹳草:老鹳草Geranium wilfordii Maxim.,鼠掌老鹳草G.sibiricum L.,毛蕊老鹳草G.platyanthum Duthie.和粗根老鹳草G.dahuricum DC.的花粉形态进行观察,发现4种老鹳草的花粉均为近球形,具短棒状、网状及穴状纹饰状;萌发孔3个且均为短沟状;但棒状体的大小和单位面积上棒状体的数量均有较大差别。本研究为老鹳草的孢粉学分类提供了依据。

Morphology of the pollen of 4 species from Geranium in Heilongjiang province which are G. wilfordii Maxim. ,G. sibiricum L.,G.platyanthum Duthie.and G. dahuricum DC.were observed with optical microscope and scanning electron microscope.The results showed pollen grains of the four species were nearly spherical,with short clavate-shaped,net-shaped and cave-shaped veins on the outer walls and three short-furrow germ pores. Both the clava size and number of clava per unit surface area were different. This paper provided evidences for paly-nology classification of Geranium.