摘要
利用扫描电镜观察了国产岩黄耆属(Hedysarum L.)18个种(含3个居群)的种皮纹饰。结果表明:岩黄耆属种皮纹饰性状在种的划分上具有重要的分类学意义。依据种皮纹饰特性,大致分为光滑型和粗糙型2大类型以及断棱状、嚼烂状、龟纹状、网纹状与细网状5个亚型。依据其划分的类型及亚型,种皮纹饰呈现出从断棱状、细网状到光滑状的演化趋势,从而阐明了种皮纹饰在岩黄耆属系统演化上的重要意义。
The seed coat patterns of 18 species （3 populations） of Hedysarum L. from China were examined under scanning electron microscope. Survey results revealed that seed coat patterns have important taxonomic significance at the species level, thus, the patterns were proposed as an attribute for taxonomical study of Hedysarum Two types of patterns, including smooth and coarse, and five sub-types, including favulariate, ruminate, areolate, reticulate and finely reticulate, were recognized on the basis of their microsculpturing features. These pattern types reflect evolutionary trends from the favulariate through the finely reticulate to the present smooth type, which verifies that seed coat patterns play an important role in Hedysarum phylogeny. Not all species of Hedysarum were investigated here, and others may display different testa patterns. Therefore, the present study was limited for Hedysarum phylogeny study.
出处
《植物学通报》
CSCD
北大核心
2007年第5期614-619,共6页
Chinese Bulletin of Botany
基金
国家自然科学基金(No.30470133)
关键词
岩黄耆属
扫描电镜
种皮纹饰
系统学意义
Hedysarum L., scanning electron microscope, seed coat patterns, systematic significance
