新疆针禾属(Stipagrostis Nees)植物叶片解剖结构的比较

干旱区研究 ›› 2011, Vol. 28 ›› Issue (1): 133-138.

新疆针禾属(Stipagrostis Nees)植物叶片解剖结构的比较

韩彩霞, 张浩, 李邦, 王绍明

石河子大学生命科学学院, 新疆石河子 832000

收稿日期:2009-12-01 修回日期:2010-04-22 出版日期:2011-02-25 发布日期:2011-09-06
作者简介:韩彩霞(1983-),女,硕士研究生,从事植物资源及生态学研究.E-mail:shz2007103007@sohu.com
基金资助:
国家自然科学基金项目 (30660031,31060067);国家重大基础研究前期研究专项 (2004CCA02800)

Comparative Study on Anatomical Structures of Plant Leaves of Stipagrostis Neas in Xinjiang

HAN Cai-xia, ZHANG Hao, LI Bang, WANG Shao-ming

College of Life Science, Shihezi University, Shihezi 832000, Xinjiang, China

Received:2009-12-01 Revised:2010-04-22 Published:2011-02-25 Online:2011-09-06

摘要/Abstract

摘要： 利用光学显微镜,对新疆荒漠中针禾属植物大颖针禾(Stipagrostis grandiglumis)和羽毛针禾(Stipagrostis pennata)叶片进行微观形态结构特征的观察与比较。结果表明:大颖针禾和羽毛针禾的叶都具有典型的适应干旱及沙漠环境的形态结构特征;2种针禾叶片表面均具有角质层,但厚度不同;两者上表皮均密生刺毛,表皮细胞外切向壁较厚,径向壁较薄,而且表皮细胞特征及气孔类型、叶脉形状及维管束数目等具有明显的种间差异,这些显微形态差异为探讨该属的系统演化关系及属下分类提供了叶解剖学证据。

关键词: 大颖针禾(Stipagrostis grandiglumis), 羽毛针禾(Stipagrostis pennata), 叶, 解剖结构, 抗旱生理, 新疆

Abstract: There are only two species in Stipagrostis in Xinjiang, i.e. S. grandiglumiss and S. pennata. They can survive in deserts because of their adaptability to desert environment. In this study, the micro-morphological features of plant leaves of these two species were observed with an optical microscope, and their anatomical structures were compared. The results show that the structure of leaves of the two species is typical and adaptable to desert environment. The thickness of epidermis of their leaves is different, there is thorn hair over the upper epidermis of their leaves, and the outer wall of epidermis cells is thicker than the inner ones. The character of epidermis cell, type of stoma apparatus, shape and number of vascular bundle of midrib are all quite different. These differences of micro-morphological features might do some favors for studying the classification of Stipagrostis Nees. The type of stoma of S. pennata is hardly round or triangle and quite pristine, but S. grandiglumis is mostly round and evolutional. Moreover, S. pennata survives in north Xinjiang, while S. grandiglumis in south Xinjiang. The length and the shape of the tubercles are also distinctive because of the different species and environment. The tubercle of S. pennata is round, whereas S. grandiglumis is acuate. These traits are not only related to their different species but also consisted in their different entironment.

Key words: Stipagrostis grandiglumis, Stipagrostis pennata, leaf, anatomical structure, drought resistance, Xinjiang

中图分类号:

Q945

韩彩霞, 张浩, 李邦, 王绍明. 新疆针禾属(Stipagrostis Nees)植物叶片解剖结构的比较[J]. 干旱区研究, 2011, 28(1): 133-138.

HAN Cai-xia, ZHANG Hao, LI Bang, WANG Shao-ming. Comparative Study on Anatomical Structures of Plant Leaves of Stipagrostis Neas in Xinjiang[J]. , 2011, 28(1): 133-138.

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