| 新疆阿魏的胚胎学研究 |
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| 引用本文： | 何爽,谭敦炎.新疆阿魏的胚胎学研究[J].西北植物学报,2011,31(3):439-445. |
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| 作者姓名： | 何爽 谭敦炎 |
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| 作者单位： | 1. 新疆大学,生命科学与技术学院,乌鲁木齐,830046
2. 新疆农业大学,草业与环境科学学院,新疆草地资源与生态重点实验室及西部干旱荒漠区草地资源与生态教育部重点实验室,乌鲁木齐,830052 |
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| 基金项目： | 新疆大学自然科学基金，国家自然科学基金 |
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| 摘 要： | 采用常规石蜡制片技术,对新疆阿魏不同发育时期的花和果实进行了显微切片观察.结果表明:新疆阿魏小孢子母细胞的减数分裂为同时型,小孢子四分体为四面体型和十字交叉型,成熟花粉粒为3-细胞型.雌蕊2心皮合生成2室,中轴胎座,每子房室内产生上、下2个胚珠原基,其中,下方的原基正常发育,而上方的原基停止发育并最终解体,因此,每室仅产生一枚发育正常的倒生胚珠,单珠被,薄珠心,胚囊发育为蓼型;珠被绒毡层和珠孔塞发生于大孢子四分体时期,并于四核胚囊时分化完全,八核胚囊时珠被绒毡层细胞径向延长;3个成熟的反足细胞具双核.胚乳发育为核型,细胞壁较厚,细胞排列紧密,可保护胚免受机械损伤及防止胚失水.胚乳细胞中含有大量PAS染色呈正反应的物质,一些胚乳细胞异常生长形成细胞体积大、核及核仁均较大的巨形细胞.胚胎发生为茄型,四细胞原胚为直线形,十六细胞原胚的顶部由2排各4个细胞组成.成熟种子具胚乳.
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| 关 键 词： | 多年生短命植物 新疆阿魏 胚胎学 |
Embryology of Ferula sinkiangensis(Apiaceae) |
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| HE Shuang,TAN Dun-yan.Embryology of Ferula sinkiangensis(Apiaceae)[J].Acta Botanica Boreali-Occidentalia Sinica,2011,31(3):439-445. |
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| Authors: | HE Shuang TAN Dun-yan |
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| Institution: | HE Shuang1,TAN Dun-yan2(1 School of Biology Sciences and Technology,Xinjiang University,Urumqi,830046,China,2 Xinjiang Key Laboratory of Grassland Resources and Ecology & Ministry of Education Key Laboratory for Western Arid Region Grassland Resources and Ecology,College of Grassland and Environment Sciences,Xinjiang Agricultural University,Urumqi 830052,China) |
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| Abstract: | The flower buds and fruits at different developmental stages of Ferula sinkiangensis were sectioned and observed through conventional paraffin section technology.The microspore mother cells undergo meiotic divisions.Cytokinesis is simultaneous,and tetrads are tetrahedral or decussate.The mature pollen contains three cells.The ovary is bicarpellary and integrated into double locule,axial placenta.Generally,there is an abortive ovule which disintegrates after the double fertilization occurs in the normal embr... |
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| Keywords: | perennial ephemerals Ferula sinkiangensis embryology |
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