干旱胁迫下不同种源甘草种子萌发特性的地理变异研究  

Geographical variation of Glycyrrhiza uralensis seed germination character on water stress

作　　者：魏胜利[1,2,3] 王文全[1,3] 张羽[2] 秦淑英[4] 刘长利[5] 张兆英[4] 邸明[1] 

机构地区：[1]北京中医药大学中药学院,北京100102 [2]东北林业大学森林资源与环境学院,黑龙江哈尔滨150040 [3]中药材规范化生产教育部工程研究中心,北京100102 [4]河北农业大学,河北保定071001 [5]首都医科大学,北京100069

出　　处：《中国中药杂志》2009年第18期2308-2311,共4页China Journal of Chinese Materia Medica

基　　金：国家自然科学基金项目(30171141)

摘　　要：目的:研究人工模拟干旱胁迫条件下甘草种源种子萌发特性的地理变异规律,探讨地理变异模式和生态学机制,为甘草种子区划和种子调拨奠定理论基础。方法:现地调查收集种源种子材料,采用PEG法设置水势梯度,通过室内发芽实验观察种子萌发特性。结果:各种源种子的发芽能力对水势降低的敏感程度存在相当显著的差异,总体呈现随着地理经度的增加,种子发芽对干旱胁迫的敏感性逐渐增加的变异趋势。与气候因子的相关分析结果表明,年均温低,年降水充沛地区种源的种子发芽对干旱胁迫敏感,而年降水量少、年均温高的地区的种源种子发芽对干旱胁迫的不敏感。结论:干旱胁迫条件下甘草种源种子萌发特性存在显著的地理变异,地理变异的形成是自然选择作用的结果。Objective：We studied the licorice provenance rule under the manual simulative water stress conditions, discussed geographical variation pattern and the ecology mechanism and laid the theoretical basis for the licorice seed regionalization and the seed allocation. Method： On the spot we investigated and collected seed materials. Setting up water potential gradient by PEG, we observed the seed germination characteristic through the experiment of indoor germination. Result： The sensitivity of various provenance seed germinative energy show quite remarkable difference for water potential reducing. Mong with geographic longitude increasing, the seed germinates variation sensitivity increasing gradually to the water stress. The results of climatic factors＇correlation analysis indicated that provenance seed germinate energy to the water stress is sensitive, in which the annual average temperature is low and annual precipitation is abundant. But it is insensitive in which the annual precipitation is little, the annual average temperature, average temperature in July and the annual average ground temperature is high. Conclusion： Under the water stress condition the licorice provenance seed germination characteristic exists remarkable geographical variation. Geographical variation is the result of natural selection.

关 键 词：甘草 地理变异 种源 PEG 干旱胁迫 

分 类 号：S567.71[农业科学—中草药栽培]