平基槭花性别分化的细胞形态学观察

doi:10.7525/j.issn.1673-5102.2009.02.004

植物研究 ›› 2009, Vol. 29 ›› Issue (2): 136-140.doi: 10.7525/j.issn.1673-5102.2009.02.004

平基槭花性别分化的细胞形态学观察

胡青¹;李凤兰¹;杜艺连²;郭惠红^1*

(1.北京林业大学生物科学与技术学院，北京　100083) (2.西藏林业局野生动植物保护处，拉萨　850000)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-03-20 发布日期:2009-03-20
通讯作者: 郭惠红
基金资助:

Morphological and Cytological Study on Floral Sex Differentiation of Acer truncatum Bge.

HU Qing;LI Feng-Lan;DU Yi-Lian;GUO Hui-Hong*

(1.College of Biological Sciences and Biotechnology,Beijing Forestry University,Beijing　100083) (2.Section of Wild Animals and Plants Reservation,Bureau of Forestry of Tibet,La Sa City　850000)

Received:1900-01-01 Revised:1900-01-01 Online:2009-03-20 Published:2009-03-20
Contact: GUO Hui-Hong
Supported by:

摘要/Abstract

摘要： 平基槭为杂性花，雄花与两性花同株，本文对其花性别分化过程进行了细胞形态学观察。结果发现，在花性别分化的早期，雄花和两性花的花芽中雌、雄蕊原基均具备，只是在花芽发育到一定时期，雄花的雌蕊原基发生选择性败育，败育发生在大孢子母细胞减数分裂为4个大孢子时期。两性花的雌蕊可以正常膨大结实，雄蕊花药虽然可以形成二核花粉，但不能正常开裂，属于不育雄蕊。初步分析认为，两性花雄蕊花药不能正常开裂与花粉囊壁纤维层木质化程度低有关。

关键词: 平基槭, 性别分化, 选择性败育, 木质化

Abstract:

The process of sex differentiation of Acer truncatum, an andromonoecious woody plant, was morphologically and cytologically observed. Results showed that at early phase of sex differentiation, both pistil and stamen primordia could be found in male and bisexual flower buds, but selective abortion occurred in the pistil primordia of male flowers when macrosporocytes developed to megaspore tetrads. Pistils of bisexual flowers could develop and set fruits normally, and the stamens could produce mature two-celled pollen but the pollen could not dehisce. It is suggested that the failure of anthers of bisexual flowers to dehisce might be caused by the low lignification in fibrous layer.

Key words: Acer truncatum Bge., sex differentiation, selective abortion, lignification

中图分类号:

Q946

胡青;李凤兰;杜艺连;郭惠红*. 平基槭花性别分化的细胞形态学观察[J]. 植物研究, 2009, 29(2): 136-140.

HU Qing;LI Feng-Lan;DU Yi-Lian;GUO Hui-Hong*. Morphological and Cytological Study on Floral Sex Differentiation of Acer truncatum Bge.[J]. Bulletin of Botanical Research, 2009, 29(2): 136-140.

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平基槭花性别分化的细胞形态学观察

Morphological and Cytological Study on Floral Sex Differentiation of Acer truncatum Bge.

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