| 烟草大小孢子发生和雌雄配子体发育研究 |
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| 引用本文： | 廖菊够,康洪梅,代瑾然,姚 恒,马文广,陈穗云.烟草大小孢子发生和雌雄配子体发育研究[J].西北植物学报,2013,33(1):11-16. |
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| 作者姓名： | 廖菊够 康洪梅 代瑾然 姚 恒 马文广 陈穗云 |
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| 作者单位： | 1. 云南大学生命科学学院植物学系,昆明,650091
2. 云南省烟草农业科学研究院,云南玉溪,653100 |
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| 基金项目： | 云南省烟草公司项目(2010YN09,2011YN60,2011174);云南大学生命科学学院植物科学研究所青年教师基金项目(ZW201002) |
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| 摘 要： | 采用卡宝品红染色压片和石蜡切片法对迪勃纳氏烟草(Nicotiana debneyi)大小孢子发生和雌雄配子体发育过程进行了研究.结果发现:(1)迪勃纳氏烟草为两性花,其小孢子发生和雄配子体发育早于大孢子.(2)迪勃纳氏烟草小孢子发生和发育过程基本正常,减数分裂过程有少数细胞出现滞后染色体、染色体断片和染色体桥等异常现象;其胞质分裂为同时型,四分体为十字交叉型和正四面体型,成熟的花粉粒为2细胞型.(3)迪勃纳氏烟草为2室子房,中轴胎座,倒生胚珠,胚珠多数,胚囊发育为蓼型,大孢子发生和发育过程未观察到异常现象.
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| 关 键 词： | 迪勃纳氏烟草 大孢子发生 小孢子发生 雌配子体 雄配子体 |
Megasporogenesis,Microsporogenesis and Development of Female and Male Gametophyte of Nicotiana debneyi |
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| LIAO Jugou,KANG Hongmei,DAI Jinran,YAO Heng,MA Wenguang,CHEN Suiyun.Megasporogenesis,Microsporogenesis and Development of Female and Male Gametophyte of Nicotiana debneyi[J].Acta Botanica Boreali-Occidentalia Sinica,2013,33(1):11-16. |
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| Authors: | LIAO Jugou KANG Hongmei DAI Jinran YAO Heng MA Wenguang CHEN Suiyun |
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| Institution: | 1(1 School of Life Science,Yunnan University,Kunming 650091,China;2 Tobacco Research Institute,Yuxi,Yunnan 653100,China) |
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| Abstract: | The megasporogenesis,microsporogenesis and the development of female and male gametophyte of Nicotiana debneyi were studied by carbol fuchsin staining and paraffin sectioning.The results showed that:(1)N.debneyi is hermaphrodite flower and the microspore develops earlier than megaspore.(2)Microsporogenesis and development of male gametophyte of N.debneyi are normal but there are chromosome bridges,chromosome fragment,laggard chromosome in a few cells.The meiosis in microspore of N.debneyi is simultaneous cytokinesis and the tetards are decussate or tetrahedral types.The mature pollens belong to 2 cell type.(3)N.debneyi is ovary 2-locular,axile placenta,ovules numerous and polygonum type of mature embryo sac.Megasporogenesis and the development of female gametophyte of N.debneyi are normal. |
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| Keywords: | Nicotiana debneyi megasporogenesis microsporogenesis female gametophyte male gametophyte |
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