通过根套结构分析研究羽毛三芒草抗旱机制

摘要/Abstract

摘要： 沙生植物能够通过不同的作用机制抵抗外界干旱。作为典型沙生植物的羽毛三芒草,可以通过根分泌一些黏性物质形成一种根套结构从而具有较高抗旱性。研究过程中首先培养羽毛三芒草的无菌苗,然后以此为基础利用光学显微镜和电子显微镜研究羽毛三芒草的根套结构。结果表明,羽毛三芒草的根套是自身生长出的,并且具有腔室结构,腔室为一个密闭的独立空间并被连接带隔开成许多小室。羽毛三芒草可能通过其独特的腔室结构储存水分来应对沙漠的干旱环境。

关键词: 羽毛三芒草, 根套, 抗旱机制

Abstract: The psammophyte resists drought by different mechanisms. Aristida Pennata Trin, a typical psammophyte, can resists drought by a root set which comes from viscid material secreted from its root. The sterile seedling is raised in the laboratory to investigate the structure of its root set under optical microscope and electron microscope. The result shows that the root set is formed of viscid material secreted from its root, and its main part is a chamber which is segmented a few little rooms. Aristida Pennata Trin may store water in the chamber to resist drought.

Key words: Stipagrostis pennata Trin, root set, drought resistance mechanism

中图分类号:

Q944.5

宫保华;王爱英;赵红英;祝建波;张煜星;*. 通过根套结构分析研究羽毛三芒草抗旱机制[J]. 中国沙漠, 2010, 30(3): 556-559.

GONG Bao-hua;WANG Ai-ying;ZHAO Hong-ying;ZHU Jian-bo;ZHANGg Yu-xing;. Drought Resistance Mechanism of Aristida Pennata Trin’s Root Set[J]. JOURNAL OF DESERT RESEARCH, 2010, 30(3): 556-559.

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