植物学报 ›› 2006, Vol. 23 ›› Issue (1): 37-43.

• 研究论文 • 上一篇    下一篇

南美蟛蜞菊花的生长发育

陈笛 刘家亮 孟祥春 王小菁   

  1. (华南师范大学生命科学学院, 广东省植物发育生物工程重点实验室 广州 510631)
  • 收稿日期:2005-08-06 修回日期:2005-09-26 出版日期:2006-01-10 发布日期:2006-01-10
  • 通讯作者: 王小菁

Flower Growth and Development in Wedelia trilobata

Di Chen, Jialiang Liu, Xiangchun Meng, Xiaojing Wang   

  1. (College of Life Sciences, South China Normal University, Guangdong Key Lab of Biotechnology for Plant Development, Guangzhou 510631)
  • Received:2005-08-06 Revised:2005-09-26 Online:2006-01-10 Published:2006-01-10
  • Contact: Xiaojing Wang

摘要: 本文根据花粉的发育结合花序的显著特征, 将南美蟛琪菊(Wedelia trilobata)花的后期发育分为P1~ P7七个时期。对舌状花和盘状花的生长进行了观察。研究表明, 分化完全的舌状花在P3期、即花粉细胞四分体出现之后长度超过盘状花, 在盘状花的雄蕊出现具有萌发孔的花粉粒之后, 舌状花开始着色。P2以后的花序经离体培养可以开放, 光、糖和GA3对花序的生长和开放有显著的促进作用。

Abstract: From investigation of the development of pollen grains combined with flower growth, the inflorescence development in Wedelia trilobata was divided into 7 phases, from P1 to P7. The growth of ray and disc florets was determined during inflorescence development. Ray florets elongated faster than disc florets from phase P3, when tetrads of haploid microspores appeared, and the pigmentation of the ray floret began when the pollen grains showed germination apertures in the disc florets of the first whorl. The effects of light, sugar and GA3 on flower growth and development were investigated in vitro. Inflorescences in the P2 phase or later could grow and bloom in vitro, and sucrose, GA3 and light promoted flowering.