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| 入侵物种飞机草和紫茎泽兰的核型研究 | |
| 引用本文： | 冯玉龙,王跃华,刘元元,丁开宇.入侵物种飞机草和紫茎泽兰的核型研究[J].植物研究,2006,26(3):356-360. |
| 作者姓名： | 冯玉龙 王跃华 刘元元 丁开宇 |
| 作者单位： | 1. 中国科学院西双版纳热带植物园昆明分部,昆明,650223 2. 云南大学生命科学学院,昆明,650091 3. 中国科学院西双版纳热带植物园昆明分部,昆明,650223;云南大学生命科学学院,昆明,650091 |
| 摘 要： | 报道了菊科（Asteraceae）原泽兰属（Eupatorium）2种植物的核型,飞机草(Chromolaena odorata (L.) R. M. King &; H. Robinson）2n=60,核型公式为2n=60=32 m+28 sm,核型属于“2A”型,紫茎泽兰(Ageratina adenophora (Sprengel) R. King &; H. Robinson）2n=51,核型公式为2n=51=30 m+21 sm,核型属于“2B”型。飞机草的染色体数目变化较大,紫茎泽兰染色体数目较稳定。紫茎泽兰不能产生正常的花粉。飞机草有性生殖产生的种子发芽率低,紫茎泽兰无融合生殖产生的种子发芽率高,但2种植物入侵能力都很强,种子数量与2种植物的入侵性关系不大。 |
| 关 键 词： | 核型 飞机草 紫茎泽兰 种子 入侵性 |
| 收稿时间： | 2005-06-30 |
| 修稿时间： | 2005年6月30日 |
Karyotype of Chromolaena odorata and Ageratina adenophora |
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| FENG Yu-Long,WANG Yue-Hua,LIU Yuan-Yuan,DING Kai-Yu.Karyotype of Chromolaena odorata and Ageratina adenophora[J].Bulletin of Botanical Research,2006,26(3):356-360. | |
| Authors: | FENG Yu-Long WANG Yue-Hua LIU Yuan-Yuan DING Kai-Yu |
| Affiliation: | 1. Kunming Division, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223;2. College of Life Sciences, Yunnan University, Kunming 650091 |
| Abstract: | The karyotypes of two species belonging formerly to Eupatorium(Asteraceae) was studied.The karyotype of Chromolaena odorata(L.) R.M.King & H.Robinson was 2n=60=32 m+28 sm,belongings to the "2A" type,while Ageratina adenophora(Sprengel) R.M.King & H.Robinson was 2n=3x=51=30 m+21 sm,belongings to "2B" type.The chromosome number changed greatly in C.odorata,but stable in A.adenophora.A.adenophora could not produce normal pollen,and propagated through apomixis.The seed germination rate was significantly lower in C.odorata than in A.adenophora.But invasiveness was very strong in both C.odorata and A.adenophora.This indicates that seed amount be not related to invasiveness in the two species. |
| Keywords: | karyotype Chromolaena odorata Ageratina adenophora seed invasiveness |
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