中国兰花蕉科植物花粉形态

POLLEN MORPHOLOGY OF LOWIACEAE FROM CHINA

使用扫描电镜及光学显微镜观察了国产兰花蕉科2种植物（兰花蕉及长萼兰花蕉）的花粉形态。它们的花粉粒呈豆形、两侧对称、异极、无萌发孔，中间部分的表面具稠密的条状雕纹，两端的为皱波状雕纹。两种花粉的雕纹有些区别。兰花蕉科花粉形态特征特别，不同于姜国其他7科的花粉，属特殊的花粉类型。

Pollen morphology of the 2 species (Orchidantha chinensis and O. longisepala) inLowiacae from China was examined under SEM and LM. Their pollen grains are bean-shaped,bilaterally symmetric, heteropolar and inaperturate. The sculpture on the surface of middle part ofpollen grains is densely striate and that on surfaces of both ends of those is rugulate. Slight differ ences of sculpture exist between the 2 spedes. The features of pollen morphology of the 2 speciesshow that the pollen of Lowiaceae can be considered as a peculiar pollen type which is observed inthe order Zingiberales for the first time.