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浙江大学学报(理学版)
旅游经济学     
薹草属密花薹草组(莎草科)叶表皮微形态及其分类学意义
刘丹琪(1996—),ORCID:https://orcid.org/0000-0002-1963-2783,女,硕士研究生,主要从事植物分类学和系统进化研究,E-mail:liudanqi@stu.hznu.edu.cn.
Micromorphology of leaf epidermis of Carex sect.Confertiflorae s.l. (Cyperaceae) and its taxonomic significance
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摘要: 利用光学显微镜对广义密花薹草组Carex sect. Confertiflorae s.l.(莎草科)28种、1变种,共45个样品进行叶片表皮微形态特征观察研究。结果表明:(1)大多数种的表皮细胞形状、垂周壁式样和气孔器分布具有稳定性,上、下表皮细胞多为长方形,少数为近方形或条形,垂周壁式样多为深波状,极少数为波状,气孔器多呈带状,成列分布于下表皮的纵脉间;(2)表皮细胞大小和气孔大小在种内有差异;(3)上表皮细胞具硅质乳突的情况仅见于狭义密花薹草组sect. Confertiflorae s.str.的东亚薹草C. benkei和亚澳薹草C. brownii;(4)表皮附属物分为刺突和刺毛,刺毛仅存在于狭义密花薹草组的斜果薹草C. obliquicarpa和反折果薹草C. retrofracta。根据叶表皮的各项性状,尚无法完全区分狭义密花薹草组sect. Confertiflorae s.str.和柔果薹草组sect. Molliculae Ohwi,但叶表皮各性状在一些近缘种间存在较明显的差异,可作为区分部分近缘类群的依据。
Abstract: Micromorphology of leaf epidermis of 45 samples,which represent 28 species and one variety belonging to Carex sect.Confertiflorae s.l.,were observed under light microscope.The intra-specific stability and inter-specific differences of the leaf epidermal micromorphology,with its taxonomic significance were analyzed and discussed.The results were mainly as follows:(1) The shape of epidermal cells,the pattern of anticlinal walls and the distribution pattern of stoma were considerably stable in most different species.Both adaxial and abaxial epidermal cells were almost oblong,rarely sub-quadrate or linear,with anticlinal walls being deeply undulate,only a few being undulate,and the distribution pattern of stoma on abaxial epidermis was randomly in rows in longitudinal veins. (2) The size of epidermal cells and those of stoma were variable within species. (3) The silica papillae of the adaxial cells occurred only in C. benkei and C. brownii in sect. Confertiflorae s.str. (4) The epidermal appendages were divided into prickle and trichome,and trichomes occurred only on the epidermal cells of C. obliquicarpa and C. retrofracta in sect. Confertiflorae s.str.The characters of leaf epidermis revealed some difference among similar species in sect. Confertiflorae s.l. and could be used to distinguish species and infraspecies,but the consistence also showed among sect. Confertiflorae s. str. and its related sections.
收稿日期: 2020-02-04 出版日期: 2016-12-30
基金资助: 国家自然科学基金资助项目(31770212,31470304).
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引用本文:

刘丹琪, 鲁益飞, 耿新, 夏洁, 金孝锋. 薹草属密花薹草组(莎草科)叶表皮微形态及其分类学意义[J]. 浙江大学学报(理学版), 10.3785/j.issn.1008-9497.2021.04.010.

LIU Danqi, LU Yifei, GENG Xin, XIA Jie, JIN Xiaofeng. Micromorphology of leaf epidermis of Carex sect.Confertiflorae s.l. (Cyperaceae) and its taxonomic significance. Journal of ZheJIang University(Science Edition), 10.3785/j.issn.1008-9497.2021.04.010.

链接本文:

http://www.zjujournals.com/xueshu/sci/CN/10.3785/j.issn.1008-9497.2021.04.010        http://www.zjujournals.com/xueshu/sci/CN/Y0/V/I/1

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