| 苏赛赛,段燕青,杨小晗,高前伟,陈宇铭,项洁.高丹草在低浓度铜-镉-菲复合胁迫下的生长及响应特性[J].农业环境科学学报,2024,43(8):1753-1759. |
| 高丹草在低浓度铜-镉-菲复合胁迫下的生长及响应特性 |
| Growth and response characteristics of Sorghum-sudan grass under combined low stress of coppercadmium-phenanthrene |
| 投稿时间：2023-12-01 |
| DOI：10.11654/jaes.2023-1020 |
| 中文关键词: 高丹草 菲 铜 镉 叶绿素 |
| 英文关键词: Sorghum-sudan grass phenanthrene copper cadmium chlorophyll |
| 基金项目:山西省基础研究计划青年项目（202203021222280）；山西省高校科技创新项目（2022L549） |
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| 中文摘要: |
| 针对焦化厂等工矿废弃地残留的重金属-多环芳烃污染风险高、低成本绿色环保技术缺乏等问题，通过田间试验，研究低浓度铜-镉-菲复合胁迫下高丹草萌芽率，生物量，铜、镉累积，菲去除及叶绿素含量的变化规律，探索其生长及污染物迁移累积等响应特性。结果表明：10 mg·kg-1菲和 100 mg·kg-1铜复合胁迫可促进高丹草生长，茎叶和根系生物量分别增加 14.7% 和 8.1%，5mg·kg-1镉抑制了高丹草生长。铜、镉主要累积在高丹草根部，菲-铜复合胁迫可促进铜的迁移，且提高菲去除率 40.6%，菲-镉复合则阻碍了镉的迁移。低浓度铜和菲可刺激叶绿素a合成，而铜、镉复合胁迫造成叶绿素b含量下降。相关性分析证实高丹草生长、污染物迁移及叶绿素合成之间具有较强的相关性。研究表明，高丹草在低浓度铜-镉-菲复合胁迫下可以生长，并在重金属迁移、有机物代谢及叶绿素变化等过程中呈现胁迫响应。 |
| 英文摘要: |
| To study the growth and response characteristics of Sorghum-sudan grass under low concentrations of combined heavy metalpolycyclic aromatic hydrocarbon pollution, the germination rate changes, biomass, accumulation of copper, cadmium and phenanthrene degradation and chlorophyll composition were detected by field experiments. The results showed that the combined stress of 10 mg·kg-1 phenanthrene and 100 mg·kg-1 copper could promote Sorghum-sudan grass growth, increasing the sum of the stem and leaf biomass and the root biomass by 14.7% and 8.1%, respectively. However, cadmium（5 mg·kg-1）inhibited the grass growth. Copper and cadmium accumulated in the roots, and the combined stress of phenanthrene and copper promoted copper migration and increased the phenanthrene removal rate by 40.6% but hindered cadmium migration. Meanwhile, low concentrations of copper and phenanthrene could stimulate the synthesis of chlorophyll a, while the combined stress of copper and cadmium resulted in a chlorophyll b content decrease. Correlation analysis further confirmed the strong correlation between Sorghum-sudan grass growth, pollutant migration, and chlorophyll synthesis. Consequently, Sorghum-sudan grass could grow under a low combined stress of copper-cadmium-phenanthrene and respond to the stress through heavy metal migration, organic metabolism, and changes in chlorophyll content. |
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