草地学报

›› 2005, Vol. 13 ›› Issue (2): 102-105.DOI: 10.11733/j.issn.1007-0435.2005.02.004

• 研究论文 • 上一篇    下一篇

水分胁迫对几种假俭草的影响

郑玉红1, 蔡庆生1, 刘建秀2   

  1. 1. 南京农业大学生命科学院, 南京, 210095;
    2. 江苏省中国科学院植物研究所, 南京中山植物园, 南京, 210014
  • 收稿日期:2003-07-24 修回日期:2004-05-11 出版日期:2005-05-15 发布日期:2005-05-15
  • 作者简介:郑玉红(1976- ),女,河南潢川人,在读博士,主要从事植物抗性生理方面的研究
  • 基金资助:
    国家自然科学基金项目资助(30070538)

Response of Centipedegrass (Eremochloa ophiuroides (Munro.)Hack.) Accessions to Water stress

ZHENG Yu-hong1, CAI Qing-sheng1, LIU Jian-xiu2   

  1. 1. College of Life Sciences, Nanjing Agriculture University, Nanjing Jiangsu Province 210095, China;
    2. Institute of Botany, Jiangsu Province & Chinese Academy of Sciences, Nanjing Botanical Garden Mem. Sun Yat-senNanjing, Jiangsu Province 210014, China
  • Received:2003-07-24 Revised:2004-05-11 Online:2005-05-15 Published:2005-05-15

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摘要： 测定5个假俭草(Eremochloa ophiuroides)的匍匐茎和叶片在干旱胁迫期间含水量、细胞质电解外渗率及土壤含水量的变化,并分析其简单相关关系和线性回归。结果表明:叶片和匍匐茎含水量,土壤含水量均随着干旱胁迫时间的延长而降低;细胞电解质外渗率则增加,但降低和增加的幅度不尽相同,而且叶片和匍匐茎的增加或降低不同步;对照组(E102)除叶片失水速率明显低于其他种源外,并无明显优于国产假俭草种源抗旱性的特征;叶片与匍匐茎含水量、电解质外渗率与土壤含水量之间呈显著和极显著相关;叶片含水量与其电解质外渗率之间呈极显著或显著线性关系,表明假俭草水分状况与其细胞受伤害程度及其抗旱性之间联系密切。

关键词: 假俭草, 含水量, 电解质外渗率

Abstract: Five centipedegrass accessions were tested under water stress for their leaf and stolon moisture content and cytoplasm electrolyte leakage rate, as well as changes of the soil moisture content to analyze their single correlations and linear regression. The results show that as water stress prolongs, the stolon, leaf, and soil moisture contents reduce, while the stolon and leaf cytoplasm electrolyte leakage rates rise, though the extent of the decrease and of the increase are varied, and the reducing and rising in the stolons and in the leaves are not synchronous. The accession of serial number E102 does not excel the others in draught resistancy, except its leaves give lower moisture-losing rate. There are close correlations among leaf and stolon moisture content and their cytoplasm electrolyte leakage rate, and the soil moisture content. The leaf moisture content and its cytoplasm electrolyte leakage rate show significant linear relations, indicating the close relationship among the centipedegrass moisture content, the extent or its cell injuries and the drought resistancy of the grass.

Key words: Centipedegrass (Eromochloa ophiuroides (Munro.)Hack.), Moisture content, Electrolyte leakage rate

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