| 镉胁迫对草地早熟禾生长与生理代谢的影响 |
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| 引用本文： | 鲜靖苹,柴澍杰,王勇,牛奎举,董文科,马晖玲,张然.镉胁迫对草地早熟禾生长与生理代谢的影响[J].核农学报,2019,33(1):176-186. |
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| 作者姓名： | 鲜靖苹 柴澍杰 王勇 牛奎举 董文科 马晖玲 张然 |
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| 作者单位： | 1 甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃 兰州 730070; 2 新乡学院生命科学技术学院,河南 新乡 453000 |
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| 基金项目： | 甘肃农业大学科技创新基金(学科建设基金)项目(GAU-XKJS-2018-018),国家自然科学基金(31360583),2017年国家大学生创新创业计划训练项目(201710733007) |
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| 摘 要： | 为探究不同草地早熟禾种质材料耐镉(Cd)性的差异,筛选出耐Cd和Cd敏感种质,采用温室盆栽试验法,通过测定早熟禾幼苗干物质含量、叶片相对含水量和光合色素含量等指标,运用隶属函数法对材料的耐Cd性进行综合评价,以及对不同浓度Cd处理下10份材料的丙二醛(MDA)、脯氨酸(Pro)、超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)等指标进行测定,研究Cd胁迫下10份草地早熟禾种质的生长及生理响应。结果表明,随着Cd处理浓度的升高,10份草地早熟禾材料苗期的干物质含量、叶片相对含水量和叶绿素含量等较对照均呈显著下降趋势,经综合评价筛选出10号耐Cd材料和8号Cd敏感材料。10份草地早熟禾材料的地上部分和根系中Cd浓度均随着Cd处理浓度的增加而增加。相同Cd浓度处理下,地上部分Cd浓度最高为10号材料,5号次之,8号地上部分的Cd浓度最低。根系Cd浓度最高是10号材料。10号材料的3种酶活性和Pro含量均高于其他材料,MDA含量均低于其他材料,表现出较高的耐Cd性,而8号材料则相反,其耐Cd性的测定结果与隶属函数评价结果相符。本研究结果为草地早熟禾在重金属修复潜力方面提供了理论依据。
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| 关 键 词： | 草地早熟禾 镉胁迫 隶属函数法 |
| 收稿时间： | 2018-01-16 |
Effect of Cadmium Stress on Growth and Physiological Metabolism of Kentucky Bluegrass |
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| XIAN Jingping,CHAI Shujie,WANG Yong,NIU Kuiju,DONG Wenke,MA Huiling,ZHANG Ran.Effect of Cadmium Stress on Growth and Physiological Metabolism of Kentucky Bluegrass[J].Acta Agriculturae Nucleatae Sinica,2019,33(1):176-186. |
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| Authors: | XIAN Jingping CHAI Shujie WANG Yong NIU Kuiju DONG Wenke MA Huiling ZHANG Ran |
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| Institution: | 1 Sino-U.S. Center for Grazingland Ecosystem Sustainability/Pratacultural Engineering Laboratory of Gansu Province/Key Laboratory of Grassland Ecosystem, Ministry of Education/College of Pratacultural Science, Gansu Agricultural University,Lanzhou, Gansu 730070; 2 School of Science and Technology, Xinxiang University, Xinxiang, Henan 453000 |
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| Abstract: | The main purpose of this paper was to study the differences response in the growth and physiological of 10 Kentucky bluegrass materials under cadmium stress and to select the cadmium resistant materials and cadmium sensitive materials. A pot experiment was conducted under greenhouse condition to investigate the resistance of 10 Kentucky bluegrass materials. Through the determination and analysis of the dry matter content, relative water content and photosynthetic pigment content of the seedling, the cadmium resistance of materials was evaluated comprehensively using the membership function comprehensive evaluation method. To improve the accuracy of the test, the effect of cadmium on contents of malondialdehyde and proline on activities of superoxide dismutase, peroxidase and catalase were analyzed. The results showed that the dry matter content, leaf relative water content and the photosynthetic pigment content of Kentucky bluegrass were significantly lower under Cd treatment than the control and decreased gradually as Cd concentration increased. Cadmium resistant material No. 10 and cadmium sensitive material No. 8 were selected by the result of comprehensive evaluation. The concentration and accumulation of Cd in both shoots and roots increased with Cd dose. At the same level of Cd treatment, the highest shoot concentration of Cd was found in material No. 10, followed by material No.5, while the lowest shoot concentration of Cd was found in material No. 8. The highest root concentration of Cd was in material No. 10. Antioxidative enzyme activities of material No. 10 material were higher than other materials, however its contents of malondialdehyde were lower than other materials which indicated that No. 10 has stronger resistance to Cadmium contrary to material No. 8. The determination of cadmium resistance was consistent with the evaluation result of the membership. The conclusions of this study would provide reference for plants breeding on heavy metal pollution phytoremediation. |
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| Keywords: | Kentucky bluegrass cadmium stress subordinate function values analysis |
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