| 2扁蓿豆萌发对干旱胁迫的响应及抗旱性评价 |
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| 引用本文： | 蔡丽艳,李志勇,孙启忠,李鸿雁,杨玉平,刘蕾.2扁蓿豆萌发对干旱胁迫的响应及抗旱性评价[J].草业科学,2012,29(10):1553-1559. |
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| 作者姓名： | 蔡丽艳 李志勇 孙启忠 李鸿雁 杨玉平 刘蕾 |
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| 作者单位： | 1. 中国农业科学院草原研究所,内蒙古呼和浩特,010010
2. 内蒙古农业大学生态环境学院,内蒙古呼和浩特,010019 |
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| 基金项目： | 农业部农作物种质资源保护与利用项目“多年生牧草更新复壮与利用”，农业部牧草种质资源保护项目“牧草温带备份库的维护与备份繁殖入库”，内蒙古自治区科技计划项目 |
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| 摘 要： | 以不同浓度聚乙二醇(PEG 6000)溶液（0、10%、15%、20%和25%）模拟干旱胁迫条件，对不同生态区的6份扁蓿豆种质材料种子萌发及幼苗生长特性进行了研究。结果表明，随着干旱胁迫的加剧，6份扁蓿豆种子的发芽率、发芽势、发芽指数、活力指数、芽长、根长及幼苗干质量均呈下降趋势，而根长与芽长的比值则逐渐增大；采用聚类分析和隶属函数法对干旱胁迫下扁蓿豆种子萌发期的抗旱性进行了综合评价，得出来源于通辽市大青沟自然保护区的02972及包头市土默特右旗的02988和03056的抗旱性较强，而呼和浩特市武川县的02982抗旱性最差。
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| 关 键 词： | PEG胁迫 种子萌发 综合评价 |
Response of seed germination of Melilotoides ruthenica to drought stress and its drought resistance evaluation |
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| CAI Li-yan,LI Zhi-yong,SUN Qi-zhong,LI Hong-yan,YANG Yu-ping,LIU Lei.Response of seed germination of Melilotoides ruthenica to drought stress and its drought resistance evaluation[J].Pratacultural Science,2012,29(10):1553-1559. |
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| Authors: | CAI Li-yan LI Zhi-yong SUN Qi-zhong LI Hong-yan YANG Yu-ping LIU Lei |
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| Institution: | 1.Grassland Research Institute of Chinese Academy of Agricultural Sciences,Huhhot 010010,China; 2.College of Ecology and Environment,Inner Mongolia Agricultural University,Huhhot 010019,China) |
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| Abstract: | The six kinds of germplasm materials of Melilotoides ruthenica from different ecological regions was used to evaluate their seed germination and seedling growth under simulation drought resistance condition with PEG solution. This study indicated that the seed germination rate, germination energy, germination index, vigor index, bud length, root length and seedling dry weight decreased, however, the ratio of root length and bud length gradually increased as the drought stress increased. Evaluation on drought resistance of M.ruthenica germplasms by using cluster analysis and subordination function method showed that the germplasm materials entitled 02972 derived from the Daqinggou Nature Reserve of Tongliao City, and the germplasm materials entitled 02988 and 03056 derived from the Right Tumete Banner of Baotou City had strong drought resistance and the germplasm materials entitled 02982 derived from the Wuchuang County of Hohhot City was poor for drought resistance. |
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| Keywords: | Medicago ruthenica PEG stress seed germination comprehensive evaluation |
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