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Plant Diversity ›› 2009, Vol. 31 ›› Issue (1): 8-14.DOI: 10.3724 SP.J.1143.2009.07329

• 研究论文 • 上一篇    下一篇


王定康1 , 2 , 孙桂芳3 , 翟书华2 , 郭丽红2 , 萧凤回1   

  1. 1 云南农业大学中药材研究所云南省中药材规范化种植技术指导中心, 云南昆明 650201 ;
    2 昆明学院生物系, 云南昆明 650031 ; 3 昆明医学院技能中心, 云南昆明 650031
  • 收稿日期:2008-02-11 出版日期:2009-02-25 发布日期:2009-02-25
  • 通讯作者: XIAO Feng-Hui

The Floral Syndrome and Its Pollination in Cynanchum otophyllum (Asclepiadaceae)

WANG Ding-Kang1 , 2 , SUN Gui-Fang3 , ZHAI Shu-Hua2 , GUO Li-Hong2 , XIAO Feng-Hui1   

  1. 1 Institute of Chinese Medicinal Materials of Yunnan Agricultural University, Yunnan Provincial Center for Chinese Medicinal Material GAP Technology , Kunming 650201 , China ;
    2 Biology Department , Kunming University , Kunming 650031 , China ;
    3 Skill Center, Kunming Medical College, Kunming 650032 , China
  • Received:2008-02-11 Online:2009-02-25 Published:2009-02-25
  • Contact: 萧凤回

摘要: 对青阳参花( Cynanchum otophyllum) 部综合特征、访花昆虫种类、访花行为及传粉过程进行了研究, 结果表明, 青阳参花结构复杂, 两个子房基部离生、花柱联合与雄蕊形成合蕊柱, 柱头表面被邻近花药的侧翼紧密包围形成5 个柱头腔。青阳参的花粉形成独特的花粉块, 一次传粉过程可以转运大量的花粉。东方蜜蜂( Apis cerana) 是青阳参的主要传粉昆虫, 其传粉包括两个过程: ( 1) 当蜜蜂的口器或足插入着粉腺的槽口后借助蜜蜂的力量将花粉块从花上拔起; (2) 当蜜蜂再次访花时将携带的花粉块插入其中一个柱头腔。花粉块里面的花粉粒在柱头腔中萌发出花粉管, 然后沿着花柱道向下生长最后进入子房。在整个花期花粉保持有相对较高的生活力, 而其柱头可授性则在7 天后逐渐降低。

关键词: 青阳参, 花部结构, 访花昆虫, 传粉


This paper studied on the floral syndrome of Cynanchum otophyllum, visiting insects and their foraging behavior. The results showed that the floral morphologies were complex . Two separate ovaries were united by their styles to form a gynostegium with anthers . The stigmatic surfaces were enclosed by the tightly abutting wings of adjacent anthers to produce five stigmatic chambers . C. otophyllum possessed pollinia , which permited the transfer of hundreds of pollen grains at a time . Honeybees ( Apis cerana Fabricius) were primary pollinators . The process of C. otophyllum pollination was : ( 1) removal of a pollinarium: when the groove in the corpusculum catched on mouthparts or legs of honeybees and was forcibly pulled from the flower, and (2) insertion of a pollinium: when a pollinium lodged in a stigmatic chamber . Following successful
insertion , the pollens germinated within the stigmatic chamber and pollen tubes subsequently grew down the stylar
canal and finally entered the ovaries . The durable covering of pollinia allowed a long residence time on pollen viability , so
the pollen could remain a relatively high viability in the flower period . Stigma receptivity , however , decreased gradually
over the seven-day life span of flowers .

Key words: Cynanchum otophyllum