| 光果舟果荠分类地位的修订 |
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| 引用本文： | 周桂玲,王永,谭敦炎.光果舟果荠分类地位的修订[J].西北植物学报,2008,28(9). |
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| 作者姓名： | 周桂玲 王永 谭敦炎 |
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| 作者单位： | 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,乌鲁木齐,830052 |
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| 基金项目： | 国家自然科学基金，新疆农业大学草业科学国家重点学科资助项目 |
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| 摘 要： | 从形态和细胞学角度,对舟果荠和光果舟果荠的果实与种子形态、花粉形态以及染色体数目进行了比较研究,并对光果舟果荠的分类地位进行了重新探讨.结果表明,舟果荠和光果舟果荠的种子大小及形态和微形态基本相似,但前者的果实密被柔毛,花粉粒体积比后者的大,染色体数目为2n=14,而后者的果实光滑无毛,染色体数目为2n=12.二者在果实与花粉粒形态以及染色体基数上存在明显的差异.建议将光果舟果荠独立成种,恢复原有的分类位置.
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| 关 键 词： | 舟果荠属 光果舟果荠 果实形态 花粉 染色体 分类地位 |
Revision of the Taxonomic Status of Tauscheria gymnocarpa Fisch. ex DC. (Brassicaceae) |
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| ZHOU Gui-ling,WANG Yong,TAN Dun-yan.Revision of the Taxonomic Status of Tauscheria gymnocarpa Fisch. ex DC. (Brassicaceae)[J].Acta Botanica Boreali-Occidentalia Sinica,2008,28(9). |
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| Authors: | ZHOU Gui-ling WANG Yong TAN Dun-yan |
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| Abstract: | After comparing the morphology of fruits,seeds and pollen,as well as chromosome number of two taxa of Tauscheria Fisch.ex DC.,the taxonomic status of T.lasiocarpa Fisch.ex DC.var.gymnocarpa(Fisch.ex DC.) Boiss.is re-evaluated.Our results show that their seed size,morphology and micromorphology are similar.However,the fruits of T.lasiocarpa are densely pubescent and those of T.gymnocarpa glabrous;pollen size of the former is larger than that of the latter.Moreover,the chromosome number is 2n=14 for T.lasiocarpa and 2n=12 for T.gymnocarpa.The data on fruit morphology,pollen size and chromosome number clearly show that T.gymnocarpa is distinct from T.lasiocarpa.Thus,T.gymnocarpa should be reinstated as a separate species form,not lower taxonomical level or a synonym of T.lasiocarpa. |
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| Keywords: | Tauscheria Tauscheria gymnocarpa fruit morphology pollen chromosome taxonomic status |
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