Cu^(2+)胁迫对西藏林芝市野生毛果胡卢巴种子萌发特性的影响  

The Effect of Cu^(2+) Stress on the Seed Germination of Wild Trigonella pubescens in Nyingchi, Tibet

作　　者：邓时梅 王传旗 张文静 周晶 王小川 索朗江才 苗彦军[3] DENG Shimei;WANG Chuanqi;ZHANG Wenjing;ZHOU Jin;WANG Xiaochuan;SUOLANGJIANGCAI;MIAO Yanyun(Department of Plant Science,Tibet Agricultural and Animal Husbandry College,Nyingchi Tibet,860000,China;CCCC Hemei Eco-Environmental Construction Co.,Ltd,Wuhan Hebei,430052,China;Department of Animal Science,Agricultural and Animal Husbandry College of Tibet,Nyingchi Tibet,860000,China)

机构地区：[1]西藏农牧学院植物科学院,西藏林芝860000 [2]中交和美环境生态建设有限公司,湖北武汉430052 [3]西藏农牧学院动物科学院,西藏林芝860000

出　　处：《高原农业》2018年第5期526-529,536,共5页Journal of Plateau Agriculture

基　　金：中交第二公路勘察设计研究院有限公司科技研发项目("西藏高寒地区路域生态修复技术研究"编号:HBDX-2016-013);国家重点研发计划项目(2016YFC0502002)

摘　　要：探索Cu^(2+)胁迫对西藏林芝市巴宜区毛果胡卢巴(Trigonella pubescens)种子萌发的影响,为西藏矿区周边Cu^(2+)污染土壤植被修复提供依据。以毛果胡卢巴种子为材料,采用纸上发芽法,对其进行不同浓度的Cu^(2+)溶液(0,40,80,160,300,400,500 mg·L^(-1))处理,研究不同浓度Cu^(2+)溶液对毛果胡卢巴种子发芽率、发芽指数、活力指数以及根长和芽长的影响。结果表明,低浓度的Cu^(2+)处理有利于种子萌发,但不利于其种子活力指数和根芽的生长;毛果胡卢巴种子的发芽率和发芽指数均以40 mg·L^(-1)1Cu^(2+)溶液浓度为界呈先升后降的变化趋势;活力指数、幼苗的根长和芽长随Cu^(2+)溶液浓度的升高呈持续下降的趋势。毛果葫芦巴对Cu^(2+)的耐受性较差,在修复Cu^(2+)污染的土壤植被中不具有应用潜力。The objective of this study was to explore the effect of Cu2＋ stress on the seed germination of wild Trigonella pubescens in Nyingchi, Tibet and to provide the basis for the restoration of Cu2＋ contaminating soil and vegetation in Tibet. The seeds of Trigonella pubescenswere germinated in plastic boxes with two layers of filter paper, and the effects of different concentrations（0, 40, 80, 160, 300, 400, 500 mg·L-1） of Cu2＋ solution on the seed germination percentage, the germination index, the vigor index, the root length and the bud length were analyzed. The results showed that low concentration of Cu2＋ promoted the seed germination percentage and the germination index, but inhibited the seed vigor index and the growth of roots and buds. The germination percentage and the germination index rose first and declined afterwards and the vigor index, the root length and the bud length of the seedlings decreased continuously with the increase of the Cu2＋ concentration. It is concluded that Trigonella pubescens has poor tolerance to Cu2＋ and has little application potential in the restoration of Cu2＋ contaminated soil and vegetation.

关 键 词：CU^2+胁迫 毛果胡卢巴 种子萌发特性 

分 类 号：S542.9[农业科学—作物学]