摘要
利用光学显微镜对萝藦科鹅绒藤属17种1亚种植物花粉器的形态特征进行观察。结果表明:(1)该属植物花粉器形状大小在各个种间差异较大:花粉块下垂,通常呈球形、长球形和超长球形,平均大小为327.2μm×183.9μm;着粉腺呈长圆形、近圆形、近方形和近三角形,平均大小为406.1μm×231.4μm。(2)翅果杯冠藤的花粉块柄最不发达,豹药藤的花粉块柄最发达。(3)白薇与朱砂藤、刺瓜与轮叶白前的花粉器特征均较相近。研究结果支持《中国植物志(第63卷)》中对催吐白前组(Sect.Vincetoxicum)的分组处理;支持将娃儿藤属(Tylophora)作为一个独特类群的观点;因国内翅果杯冠藤和美翼杯冠藤的花粉器形态存在差别,故不支持Flora of China(Vol.16)中认为翅果杯冠藤是美翼杯冠藤的错误鉴定与处理。
The pollinarium morphology of 17 species and 1 subspecies of Cynanchum were observed under light microscope（LM）. The results showed that. （1）The sharp and size of pollinarium of Cynanchurn were different from various kinds of species. The pollinia were sagging,and their shape were usually spheroidal, prolate,and perprolate. The average size of pollinia was long 327.2 μmX wide 183.9 t,m. The shape of reti- naculum were oblong, near roundness, near squares, and near triangle, and their average size was long 406.1 μmXwide 231.4 μm. （2）The caudicle of C. alarum was the least developed,while that of C. decipiens was the most developed. （3）The poliinarium morphology of C. atraturn and C. officinale, C. corymbosum and C. verticillatum were similar. The results supported the treatment of Cynanchum Sect. Vinceto：cicum in Flora Reipublicae Popularis Sinicae （Vol. 63） and supported that Tylophora should be a unique group. It was considered that C. alarum was the false identification of C. callialatum in Flora of China （Vol. 16）, since the results in this paper showed their pollinarium morphology were different.
出处
《西北植物学报》
CAS
CSCD
北大核心
2012年第9期1758-1762,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金项目(31000095)
广东省大学生创新实验项目(1056411009)
国家高等学校本科特色专业建设点-林学(教高函[201015]号)
关键词
鹅绒藤属
花粉器
萝藦科
分类
Cynanchum
pollinarium
Asclepiadaceae
taxonomy
