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|本期目录/Table of Contents|

空心莲子草雄蕊和雌化雄蕊发育的比较研究

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年04期
页码:
451
栏目:
系统与演化植物学
出版日期:
2011-07-25

文章信息/Info

Title:
Comparative study on the development of stamen and feminisation stamens of Alternanthera philoxeroides
作者:
胡法玉1 常青山2 张利霞2 袭梅1 王庆亚1*
1.南京农业大学 生命科学院, 南京 210095; 2.南京农业大学 园艺学院, 南京 210095
Author(s):
HU FaYu1 CHANG QingShan2 ZHANG LiXia2 XI Mei1 WANG QingYa1*
1.College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China;2.College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
关键词:
空心莲子草 雄蕊 雌化雄蕊
Keywords:
Alternanthera philoxeroides stamen Feminisation stamen
分类号:
Q944.5
DOI:
-
文献标识码:
A
摘要:
采用形态解剖和石蜡切片法,对空心莲子草雄蕊和雌化雄蕊的形态和结构的发育过程进行了观察。结果显示:(1)在形态上,空心莲子草两性花雄蕊由聚药雄蕊和无药雄蕊构成,二者相间而生成一轮;而空心莲子草雌化雄蕊花的雌化雄蕊由雌化雄蕊和无药雄蕊构成,雌化雄蕊的外形如雌蕊状,其外轮为无药雄蕊,二者前后对应而生,成二轮;(2)在结构上,空心莲子草两性花雄蕊的每个花药具两个花粉囊,花药壁由表皮、药室内壁、中层和绒毡层组成,花粉母细胞减数分裂形成的四分体有四面体型和左右对称型,成熟花粉粒为3核,但后期大量解体,新鲜花粉粒经生活力测定无活性;雌化雄蕊花雌化的雄蕊有柱头、花柱和子房,但子房室内无胚珠状结构,仅为一个空腔。
Abstract:
The morphology structure development of stamen and feminisation stamen of Alternanthera philoxeroides were observed by the methods of morphology anatomy and paraffin section. The results showed that:(1)In the morphology,stamen of bisexual flower of A.philoxeroides consisted of staminodium and synantherous stamen,which were interval in a wheel;while feminisation stamen of feminisation stamen flower of A.philoxeroides consisted of staminodium and feminisation stamen,which looked like pistil,staminodium beside the feminisation stamen in the outer wheel. (2)In the structure,each anther of bisexual flower of A.philoxeroides had two pollen sac,and the anther wall was composed of four layers:epidermis,endothecium,middle layer and tapetum. The tetrads were formed in meiosis of pollen mother cells,which shaped 〖JP3〗as tetrahedral and bilateral symmetry. The mature pollen was of 3 celled types,which disintegrated at the postmaturation stage. Fresh pollen had no activity through viability determination;feminisation stamen of A.philoxeroides were composed of stigma,style and ovary,however, the locule had no ovule,just a cavity.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2011-07-25