5种蒿属沙生半灌木种子萌发耐旱性研究  

A Study on Drought Resistance of Five Sand Plants of Artemisia Seeds

作　　者：韩文娟[1] 王铁娟[1] 玉昉永 

机构地区：[1]内蒙古师范大学生命科学与技术学院,呼和浩特010022

出　　处：《种子》2015年第2期42-45,共4页Seed

基　　金：国家自然科学基金(编号:31160130);内蒙古自治区自然科学基金(编号:2011 MS 0524);内蒙古师范大学科学研究基金项目(编号:RCPY-2-2012-K-049)资助

摘　　要：利用不同浓度PEG-6000模拟干旱胁迫的方法,对白沙蒿(Artemisia sphaerocephalla)、黑沙蒿(A.ordosica)、乌丹蒿(A.wudanica)、差不嘎蒿(A.halodendron)、褐沙蒿(A.intramongolica)种子萌发抗旱性进行研究。结果表明:随着干旱胁迫浓度的增加,5种植物的相对发芽率、相对发芽指数、相对发芽势、抗旱指数均降低。通过隶属函数综合评价,5种植物的抗旱性顺序为乌丹蒿>差不嘎蒿>黑沙蒿>褐沙蒿>白沙蒿。The experiment was conducted to estimate the seed drought tolerance in Artemisia sphaerocephaUa, A. Ordosica, A. wudanica, A. halodendron and A. intramongolica by simulated drought stress with different concentrations of PEG-6000. The results showed that the germination index, relative germination rate, relative germination potential and drought resistance index were decreased with increasing concentrations of PEG- 6000. According to the above four indicators, with subordinate function, the drought tolerance sequence of five experimental materials from high to low was ：A. wudanica 〉 A. halodendron 〉 A. ordosica 〉 A. inteamongolica 〉 A. sphaerocephalla.

关 键 词：干旱胁迫 蒿属 种子萌发 

分 类 号：Q945.78[生物学—植物学]