摘要
宽叶泽苔草 (Caldesia grandis Samuel.)是一种珍稀濒危水生植物。它曾经一度被认为已经从中国大陆灭绝 ,但最近又在湖南省的一个高山沼泽中被发现。本文首次报道了依据上述新发现地点的宽叶泽苔草材料进行的细胞学研究结果。核型分析结果表明 :本种染色体数目为 2 2 ,其染色体组型高度不对称。结合前人对宽叶泽苔草一些近缘种的细胞学及古生物学研究结果 。
Caldesia grandis Samuel.is an endangered aquatic plant which was once considered to be extinct in China's Mainland and was recently found in a bog in a mountainous region of Hunan Province.A cytological study on the species basing on the materials from the newly found locality is reported here.The karyotypical analysis reveals that this species has a chromosome number of 22 and contains high level asymmetrical chromosomal complements.Combining the results of cytological and paleontological studies on some closely related species reported by earlier researchers,it is suggested here that the genus Caldesia is probably the most advanced group in Alismataceae.
出处
《武汉植物学研究》
CSCD
2001年第3期187-190,共4页
Journal of Wuhan Botanical Research
基金
国家自然科学基金项目 (项目编号 :39770 0 55)
教育部骨干教师项目资助课题
