草原龙胆( Eustoma grandiflorum )单、重瓣花器官分化的形态学观察

园艺学报 ›› 2005, Vol. 32 ›› Issue (3): 458-462.

草原龙胆( Eustoma grandiflorum )单、重瓣花器官分化的形态学观察

李昀辉;李玉花

(东北林业大学花卉生物工程研究所, 哈尔滨150040)

收稿日期:2004-04-15 修回日期:2004-09-20 出版日期:2005-06-25 发布日期:2005-06-25

Morphological Studies on Floral Organ Development of the Flowers with Single- and Triple-whorled Petals in Lisianthus ( Eustoma grandiflorum )

Li Yunhui;Li Yuhua

(Bio-technology Institute of Flowers and Plants, Northeast Forestry University, Harbin 150040, China)

Received:2004-04-15 Revised:2004-09-20 Online:2005-06-25 Published:2005-06-25

摘要/Abstract

摘要： 本篇论文主要研究了草原龙胆单重瓣花器官的发育特征。取花部发生的第1个和第2个花芽为试材, 直接用于实体解剖观察。结果表明: 1. 单瓣花和重瓣花花芽分化过程均可分形态分化前期、萼片原基分化期、花瓣原基分化期、雄蕊原基分化期、雌蕊原基分化期5个时期, 各轮花器官按照向心顺序发育。2. 到雌蕊原基形成为止, 单瓣花花器官各原基的分化过程大约需要12 d, 重瓣花的整个分化过程大约需要15 d。3. 单瓣花和重瓣花都包含5枚萼片、5枚雄蕊和1枚雌蕊, 而单瓣花花瓣是5枚, 重瓣花约是15枚。

关键词: 草原龙胆, 花器官, 花芽分化, 重瓣花

Abstract: The objectives of this study were to characterize the floral organ development of the flowers with single- and triple-whorled petals in lisianthus ( Eustoma grandiflorum ). The first and second buds in a primary inflorescence were collected. A floral shoot apex of each bud was dissected, observed and recorded under stereoscope. The results were as follows: 1. Floral organ development in both types of flowers was divided into five stages from the beginning of flower bud differentiation, i1e. , (1) appearance of flower buds and the initiation of the development of ( 2) sepal primordia, (3) petal primordia, (4) stamen primordia, and (5) pistil primordium. 2. It took about 12 days for flowers with single-whorled and about 15 days for those with trip le-whorled to develop from the initiation to the end. 3. In both types of flowers, the number of sepals, petals and stamenswas five, except only one pistil. The number of petals was five and fifteen for the flowerswith single-whorled and trip le-whorled petals, respectively.

Key words: Eustoma grandiflorum, Floral organ, Flower bud differentiation, Trip le-whorled petal

中图分类号:

S 68

李昀辉;李玉花. 草原龙胆( Eustoma grandiflorum )单、重瓣花器官分化的形态学观察[J]. 园艺学报, 2005, 32(3): 458-462.

Li Yunhui;Li Yuhua. Morphological Studies on Floral Organ Development of the Flowers with Single- and Triple-whorled Petals in Lisianthus ( Eustoma grandiflorum )[J]. ACTA HORTICULTURAE SINICA, 2005, 32(3): 458-462.

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