摘要
在扫描电镜下观察了獐牙菜属SwertiaL . 10组 30种植物花蜜腺的数目、位置、形态和附属物等特征 ;同时还利用光镜对各组代表种的蜜腺结构进行了解剖学观察。结果表明獐牙菜属花蜜腺外部形态多种多样 ,但在组与组之间无明显间断 ,演化序列呈梯度变化 ;内部结构基本相同 ,为不具维管束的结构蜜腺 ,且均为淀粉型蜜腺。因此 ,从花蜜腺的角度不支持将獐牙菜属划分为小属的观点。同时 。
The morphology of floral nectaries in 10 sections, 30 species of Swertia L.was examined through scanning electron microscopy (SEM). Furthermore the anatomy of nectaries of 11 species,representing 10 sections has been investigated through light microscopy (LM).It was shown that the morphologies of nectaries present a remarkable diversity in number,shape and in the details of their opening and fimbriation,but they changed progressively and no interval in sections.Nectaries are perigonal nectary composing of epidermis and nectariferous tissue,thus they belong to structural nectary.On basis of the obtainable data,the genus Swertia is better to be treated as a broad sense genus and not to be separated into several small genera.The evolutionary trends of nectaries characters were discussed.
出处
《云南植物研究》
CSCD
北大核心
2002年第3期359-369,共11页
Acta Botanica Yunnanica
基金
中国科学院分类区系学科特别支持费
