摘要
研究了华凤仙(Impatiens chinensis L.)的花部特征和传粉系统,结果表明华凤仙单花期为2.3d,雄性期是雌性期的6.8倍。花蜜量和花蜜可溶性糖含量分别为0.56μL和28.2%。开花当天柱头即具有可授性,花粉活力在花朵刚开放时最高(95%),至花朵凋谢之前仍保持较高的活力(55%)。花粉胚珠比(5730.3±2941.1)和套袋实验的结果表明华凤仙属于自交亲和但以异交为主的繁育系统,传粉过程需要传粉者。蜜蜂、熊蜂、蝶类和几种芦蜂是华凤仙的主要访花者,最有效的传粉者为三条熊蜂。考氏无垫蜂作为盗蜜者,可能是除正常访花者之外,对华凤仙的有性繁殖影响最大的生物因素。
The floral traits and pollination system of Impatiens chinensis were studied. Individual flowers bloom for 2.3 days and the male phase was 6.8 times as long as female phase. The nectar quantity and sugar concen- tration is 0.56 μL and 28.2%, respectively. Stigma is receptive on the day of anthesis. Pollen viability is high- est on the moment of corolla displaying（95% ）, thereafter decreases gradually and maintains a considerable level until the flower drops（55% ）. The results of P/O detection （5 730.3 ±2 941.1 ） and bagging treatments suggest that I. chinensis is self-compatible with facuhative xenogamy breeding system, its outcross-pollination require pol- linators. I. ehinensis is mainly visited by honey-bees, butterflies, bumble-bees and several species in ceratina （Apidae）. Bombus trifasciatus is the dominant pollinator. The nectar robber Amegilla caldwelli may be the most important biological factor which influences the sexual reproduction of L chinensis except for the legitimate visitors.
出处
《植物研究》
CAS
CSCD
北大核心
2009年第2期164-168,共5页
Bulletin of Botanical Research
基金
国家自然科学基金项目(30470130)
中国科学院知识创新工程重要方向项目(KSCX-SW-122)
"十一五"国家科技基础平台建设专项(2005DKA21403
2005DKA21006)
关键词
华凤仙
花部特征
传粉系统
三条熊蜂
考氏无垫蜂
Impatiens chinensis
floral traits
pollination system
Bombus trifasciatus
Amegilla caldwelli
