| 中国美喙藓属和长喙藓属植物的茎横切结构比较研究 |
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| 引用本文： | 刘倩,王欣欣,王幼芳,左勤.中国美喙藓属和长喙藓属植物的茎横切结构比较研究[J].西北植物学报,2009,29(9). |
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| 作者姓名： | 刘倩 王欣欣 王幼芳 左勤 |
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| 作者单位： | 华东师范大学,生命科学学院,上海,200062 |
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| 基金项目： | 华东师范大学2009年优秀博士研究生科研基金 |
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| 摘 要： | 利用徒手切片法,对美喙藓属9个种和长喙藓属10个种进行茎横切结构的比较研究,以期为美喙藓属和长喙藓属在属间以及属内种间分类提供依据.结果表明,美喙藓属植物茎横切结构性状稳定,均具有外皮部、内皮部和中轴,中轴细胞数多在15个以下;长喙藓属植物大部分中轴分化明显,细胞数目一般为15个以上.外皮部占茎横切面的比例、内外皮部的界限、细胞壁的厚薄、中轴分化的程度等特征能给属内种间区分提供分类依据.
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| 关 键 词： | 青藓科 外皮部 内皮部 中轴 种间分类 |
Comparison of the Stem Cross Section of Eurhynchium and Rhynchostegium of Chinese Brachytheciaceae(Musci) |
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| LIU Qian,WANG Xin-xin,WANG You-fang,ZUO Qin.Comparison of the Stem Cross Section of Eurhynchium and Rhynchostegium of Chinese Brachytheciaceae(Musci)[J].Acta Botanica Boreali-Occidentalia Sinica,2009,29(9). |
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| Authors: | LIU Qian WANG Xin-xin WANG You-fang ZUO Qin |
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| Institution: | LIU Qian,WANG Xin-xin,WANG You-fang,ZUO Qin(School of Life Science,East China Normal University,Shanghai 200062,China) |
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| Abstract: | For the purpose to provide valuable characters for interspecific classification,stem cross sections of 9 species of Eurhynchium and 10 species of Rhynchostegium by free-hand have been investigated.The results show that the characters in genera are stable and the two genera share the common traits.The whole stem cross section is composed of epidermis,cortex and central strand.Compared with Rhynchostegium,the central strand of Eurhynchium is distinctly differentiated comprising less than 15 cells.The characte... |
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| Keywords: | Brachytheciaceae epidermis cortex central strand interspecific classification |
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