张远兵, 刘爱荣, 董建国, 崔丙香. 9个高羊茅品种种子萌发和幼苗生长对锌胁迫的响应[J]. 中国生态农业学报(中英文), 2010, 18(2): 371-376. DOI: 10.3724/SP.J.1011.2010.00371
引用本文: 张远兵, 刘爱荣, 董建国, 崔丙香. 9个高羊茅品种种子萌发和幼苗生长对锌胁迫的响应[J]. 中国生态农业学报(中英文), 2010, 18(2): 371-376. DOI: 10.3724/SP.J.1011.2010.00371
ZHANG Yuan-Bing, LIU Ai-Rong, DONG Jian-Guo, CUI Bing-Xiang. Response of germination and growth of nine Festuca arundinacea Schreb varieties to zinc stress[J]. Chinese Journal of Eco-Agriculture, 2010, 18(2): 371-376. DOI: 10.3724/SP.J.1011.2010.00371
Citation: ZHANG Yuan-Bing, LIU Ai-Rong, DONG Jian-Guo, CUI Bing-Xiang. Response of germination and growth of nine Festuca arundinacea Schreb varieties to zinc stress[J]. Chinese Journal of Eco-Agriculture, 2010, 18(2): 371-376. DOI: 10.3724/SP.J.1011.2010.00371

9个高羊茅品种种子萌发和幼苗生长对锌胁迫的响应

Response of germination and growth of nine Festuca arundinacea Schreb varieties to zinc stress

  • 摘要: 采用液培试验, 研究了不同浓度Zn2+(0、75 mg·L-1、150 mg·L-1)胁迫对9个高羊茅品种种子发芽势、发芽率、幼苗根长、苗高、鲜重、叶绿素含量、丙二醛含量、细胞质膜透性的影响。结果表明, 随Zn2+浓度增加, 供试品种中"爱瑞3号"的发芽势和"火凤凰"幼苗的鲜重呈先上升后下降趋势, 其他品种两指标均呈下降趋势; "红象"、"金娜多"、"宇宙星"、"火凤凰"、"爱瑞3号"等品种种子的发芽率呈先上升后下降的变化趋势, 其他4个品种呈下降趋势; 9个品种的幼苗根长、苗高、叶绿素含量均呈下降趋势, 丙二醛含量和细胞质膜透性均呈上升趋势。采用Delphi法对8项指标进行综合分析显示, 75 mg·L-1 Zn2+胁迫下, 耐锌性顺序为"火凤凰">"红象">"缤狗"、"家园">"宇宙星"、"里园2号">"麦哲伦">"金娜多">"爱瑞3号"; 150 mg·L-1 Zn2+胁迫下, 耐锌性顺序为"火凤凰"、"里园2号">"缤狗">"金娜多">"爱瑞3号">"宇宙星" >"红象">"麦哲伦">"家园"。因此, 在治理Zn2+污染时, 要根据污染程度, 合理选用高羊茅品种。

     

    Abstract: The effect of different Zn2+ concentrations (0, 75 mg·L-1 and 150 mg·L-1) on seed germination potential, germination rate as well as seedling root length, shoot height, fresh weight, chlorophyll content, malondialdehyde (MDA) content and cell membrane permeability of nine varieties of F. arundinacea were studied via a solution culture experiment. With increasing Zn2+ concentration, germination potential of "Arid 3" and fresh weight of "Fire phoenix" initially increase followed by a decrease. Those of the other varieties steadily decrease with increasing Zn2+ concentration. Germination rate of "Red elephant", "Coronado gold", "Acending star", "Fire phoenix" and "Arid 3" increases initially before decreasing, whereas that of the other four varieties steadily declines. Root length, shoot height and chlorophyll content of the nine varieties decline, while MDA content and cell membrane permeability rise. Synthetic analysis of eight parameters via Delphi method indicates that at 75 mg·L-1 Zn2+ stress, the order of zinc tolerance of the nine varieties is "Fire phoenix" > "Red elephant" > "Bingo" and "Plantation" > "Acending star" and "WranglerⅡ" > "Magellan" > "Coronado gold" > "Arid 3". Under 150 mg·L-1 Zn2+ stress, zinc tolerance order is "Fire phoenix" and "WranglerⅡ" > "Bingo" > "Coronado gold" > "Arid 3" > "Acending star" > "Red elephant" > "Magellan" > "Plantation". The varieties of F. arundinacea should therefore be reasonably selected in environmental management of Zn2+ pollution based on pollution degree.

     

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