Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system
Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system
复制标题
三种茅膏菜（茅膏菜、线性茅膏菜和圆叶茅膏菜）花结构与育种系统的比较
作者：
Gillian L. Murza;A. Davis
尽管人们对食肉植物吸引猎物的叶子给予了很大的关注，但对其花的结构和繁殖系统的研究却很少。因此，本文对茅膏菜科三种茅膏菜的花部形态和解剖结构进行了比较研究。线状毛毡苔Goldie和圆叶毛毡苔L.）在萨斯喀彻温省进行，以确定潜在的传粉者花的奖励的存在，并获得花粉胚珠比，育种系统的指标。利用光学和扫描电子显微镜，这三个物种之间的差异是明显的花柱长度，胎盘，花药和花粉的颜色，萼片上的腺毛的数量和结构。每个物种所特有的特征的出现并不支持D.英国种是另外两种的杂交种。这三个物种的花都缺乏蜜腺，虽然乳头状细胞簇，让人想起分泌组织，但它们的花都没有蜜腺。
Whereas much attention has been given to the fascinating prey-trapping leaves of carnivorous plants, less research has been conducted on their flower structure and breeding systems. Accordingly, a comparative study of the floral morphology and anatomy of the three species of sundews (Droseraceae: Drosera anglica Huds., Drosera linearis Goldie, and Drosera rotundifolia L.) in Saskatchewan was performed to ascertain the presence of floral rewards for potential pollinators and to obtain pollen to ovule ratios, an indicator of breeding system. Utilizing light and scanning electron microscopy, differences between the three species were apparent in length of styles, number of placentas, anther and pollen colour, and structure of glandular trichomes on sepals. The occurrence of features unique to each species does not support the concept of D. anglica as a hybrid of the other two species. Flowers of all three species lack nectaries, although clusters of papillate cells that were reminiscent of secretory tissue w...