| 外来物种黄顶菊花器官分化的初步研究 |
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| 引用本文： | 郑书馨,古松,江莎,任艳萍,王永周,赵娜.外来物种黄顶菊花器官分化的初步研究[J].热带亚热带植物学报,2009,17(1):17-23. |
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| 作者姓名： | 郑书馨 古松 江莎 任艳萍 王永周 赵娜 |
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| 作者单位： | 南开大学生命科学学院,天津,300071 |
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| 基金项目： | 天津市自然科学基金，南开大学科研启动项目，教育部留学回国人员科研启动基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 利用扫描电镜(SEM)观察了黄顶菊(Flaveria bidentis(L.)Kuntz)花序发育过程中蝎尾状聚伞花序、头状花序和小花的形成.黄顶菊的花序由主轴及一至三级分枝组成,各级分枝交互对生,形成方式相同.植株主轴和侧枝顶端的每个花序由3～6个蝎尾状聚伞花序密集而成;每一蝎尾状聚伞花序由5～15个头状花序组成;每一头状花序中有4～11枚小花.小花分化顺序为5个花冠原基、5个雄蕊原基和2个心皮原基.2007年,天津地区黄顶菊的花期是7月下旬到9月下旬.7月中旬,花序和花器官原基不断形成并分化,至花器官成熟经历的时间约15 d.
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| 关 键 词： | 黄顶菊 花芽分化 头状花序 蝎尾状聚伞花序 |
| 收稿时间： | 2008/5/12 0:00:00 |
| 修稿时间： | 2008/10/20 0:00:00 |
The Observation on Floral Organs of an Alien Species, Flaveria bidentis (L.) Kuntze |
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| ZHENG Shu-xin,GU Song,JIANG Sh,REN Yan-ping,WANG Yong-zhou and ZHAO Na.The Observation on Floral Organs of an Alien Species, Flaveria bidentis (L.) Kuntze[J].Journal of Tropical and Subtropical Botany,2009,17(1):17-23. |
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| Authors: | ZHENG Shu-xin GU Song JIANG Sh REN Yan-ping WANG Yong-zhou and ZHAO Na |
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| Institution: | College of Life Science;Nankai University;Tianjin 300071;China |
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| Abstract: | The formation of scorpioid cyme, capitulum and floret of Flaveria bidentis (L.) Kuntze was observed under scanning electron microscopy. The inflorescence of F. bidentis was composed of the main axis with three orders branches in a decussate arrangement. Scorpioid cymes (3~6) were developed at the apex of the main inflorescence axis as well as lateral axes. Each scorpioid cyme had 5~15 capitulums which was consist of 4~11 florets. For the floral development process, five petal primordia arose firstly, then f... |
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| Keywords: | Flaveria bidentis (L ) Kuntz Flower bud differentiation Capitulum Scorpioid cyme |
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