植物分类学报

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中国花椒属(广义)叶表皮特征初步研究

123曹明; 1张奠湘*   

  1. 1(中国科学院华南植物园 广州 510650)
    2(广西壮族自治区中国科学院广西植物研究所 桂林 541006)
    3(中国科学院研究生院 北京 100049)
  • 收稿日期:2007-06-19 修回日期:2008-02-03 出版日期:2008-07-18 发布日期:2008-07-18
  • 通讯作者: 张奠湘 E-mail:dx-zhang@scib.ac.cn

Leaf epidermal morphology of Zanthoxylum s.l. (Rutaceae) from China

123Ming CAO; 1Dian-Xiang ZHANG*   

  1. 1(South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China)
    2(Guangxi Institute of Botany, Guangxi Zhuangzu Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China)
    3(Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2007-06-19 Revised:2008-02-03 Online:2008-07-18 Published:2008-07-18
  • Contact: Dian-Xiang ZHANGta md E-mail:dx-zhang@scib.ac.cn

Abstract: Leaf epidermis characters in 40 of ca. 250 species of Zanthoxylum (Rutaceae) were investigated using light microscopy (LM) and scanning electron microscopy (SEM). The stomata are anomocytic and exist only on the abaxial epidermis except in Z. nitidum, which also has stomata on the adaxial surface. The epidermal cells are usually polygonal or irregular in shape, with anticlinal walls straight, arched, repand, or sinuous. Under the SEM, the inner margin of the outer stomatal rim is nearly smooth, sinuolate or erose, and the cuticular membrane of the leaf epidermis is smooth, striate, or sometimes striate to wrinkled. These data of leaf epidermis of Zanthoxylum demonstrated that there exist many common characters between subgen. Fagara and subgen. Zanthoxylum, sug-gesting a close relationship between the two subgenera. The utility of some characters in identifying some species of Zanthoxylum was also discussed.

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