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|本期目录/Table of Contents|

狭叶柴胡大小孢子发生和雌雄配子体发育的研究

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2010年01期
页码:
45
栏目:
系统与演化植物学
出版日期:
2010-01-25

文章信息/Info

Title:
Megasporogenesis ,microsporogenesis anddevelopment of male and female gametophytes in Bupleurum scorzonerifolium
作者:
豆强红 蔡 霞
西北大学 生命科学学院, 西安 710069
Author(s):
DOU Qiang -Hong CAI Xia
College of Life Sciences , Northwest University, Xi’an 710069
关键词:
狭叶柴胡' target='_blank'> FONT-FAMILY: 宋体">狭叶柴胡 大孢子发生 小孢子发生 雌配子体 雄配子体
Keywords:
Bupleurum scorzonerifolium Bupleurum scorzonerifolium ' target='_blank'> FONT-FAMILY: 宋体"> megasporogenesis microsporogenesis male gametophyte female gametophyte
分类号:
-
DOI:
-
文献标识码:
A
摘要:
用石蜡切片法、半薄切片法对狭叶柴胡的大、小孢子发生和雌、雄配子体发育进行观察研究。结果显示:(1)狭叶柴胡花药壁的发育为双子叶型,腺质绒毡层;小孢子母细胞减数分裂过程中的胞质分裂为同时型,四分孢子为正四面体形;成熟的花粉粒为3细胞型,具3个萌发孔。(2)倒生型胚珠,单珠被,薄珠心;大孢子母细胞常为一个雌性孢原直接发育而成,大孢子四分体呈线型,多数情况为合点端一个大孢子分化为功能大孢子;由功能大孢子发育为蓼型成熟胚囊。(3)八核胚囊时期,珠心基部和两侧的一些珠心细胞留存较久,成为珠心座细胞。此外,珠被内表皮细胞发育为珠被绒毡层。
Abstract:
Megasporogenesis ,microsporogenesis and development of male and female gametophytes of Bupleurum scorzonerifolium were studied using method of paraffin section and semithin section. Firstly,the development of the anther wall belongs to a dicotyledonou’s type. The tapetum was glandular. The cytoplasm of microspore mother cell undergoes simultaneous division and produces tetrahedral tetrad; the mature pollen is 3cell type and has three colporates. Secondly,the ovary of B.scorzonerifolium is anatropous,single integument and thin nucellus. Usually one archesporium functions directly as a megaspore mother cell,in which cytokinesis usually accompanies meiosis,and mostly the chalaza megaspore of a linear tetrad develops into a Polygonumtype embryo sac. Thirdly,during 8nuclei embryo sac stage,some nucellus on the base and two sides keep their own cytoplasm and shape for a long time and finally become podium. In addition,the inner integument cells developed into endothelium.

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: 2010-03-31