摘要
利用扫描电镜对10种国产凤仙花属（Impatiens L.）植物的花粉形态进行了观察。结果表明：本属植物花粉为单粒花粉,左右对称,大小为15.0-31.2μm×25.1-42.1μm,具角萌发孔,4沟,沟细而短;花粉外壁具网状纹饰,网眼明显,大小不一。根据花粉形状,可将凤仙花属花粉分为近圆形、椭圆形和矩圆形3类。种间花粉差异主要表现在大小、形状、网脊宽度、网眼内附属物等方面。花粉特征与植物表型特征之间存在一定的相关性,具有重要的分类学意义。从花粉萌发孔类型来看,与水角属（Hydro-cera Bl.）的3沟花粉相比,凤仙花属在凤仙花科内处于较为进化的位置。
In the present study, the pollen morphology of ten species of Impatiens L. in China was observed under the scanning electron microscope （SEM）. In these species, the pollen grains are goniotreme, zygomorphic, 4-colpate, reticulate exine ornamentation. The size of pollen grains is 25.1 -42. 1μm × 15.0 - 31.2 μm. According to the shape difference, pollen grains are distinctly divided into three types, i. e. suborbicular type, elliptic type and rectangular type. The length of polar axis, equarorial axis, width of apertures and spine, and the shape of pollen are different to some extent among these different species. There is an interrelationship between the pollen morphology and some morphological characteristics, showing the important taxonomic significance. From the point of the aperture of pollen grains, compared with Hydrocera B1. , which is 3-colpate, Impatiens L. can be regarded as an evolutional genus within Balsaminaceae.
出处
《园艺学报》
CAS
CSCD
北大核心
2008年第3期389-394,共6页
Acta Horticulturae Sinica
基金
国家自然科学基金重大国际合作项目(39899400)
国家自然科学基金项目(30470130)
中国科学院知识创新工程重要方向项目(KSCX-SW-122)
国家科技部基础平台建设子项目(2005DKA21006)
关键词
凤仙花科
凤仙花属
花粉形态
扫描电镜
分类学
Balsaminaceae
Impatiens L.
pollen morphology
scanning electron microscope （SEM）
taxonomy
