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Cd与羧基化多壁碳纳米管复合胁迫下蚕豆幼苗Cd的富集与分布

刘玲 王苏杭 张进 陈成 赵薪程 刘海涛 汪承润

刘玲, 王苏杭, 张进, 陈成, 赵薪程, 刘海涛, 汪承润. Cd与羧基化多壁碳纳米管复合胁迫下蚕豆幼苗Cd的富集与分布[J]. 中国生态农业学报(中英文), 2020, 28(5): 756-763. doi: 10.13930/j.cnki.cjea.190815
引用本文: 刘玲, 王苏杭, 张进, 陈成, 赵薪程, 刘海涛, 汪承润. Cd与羧基化多壁碳纳米管复合胁迫下蚕豆幼苗Cd的富集与分布[J]. 中国生态农业学报(中英文), 2020, 28(5): 756-763. doi: 10.13930/j.cnki.cjea.190815
LIU Ling, WANG Suhang, ZHANG Jin, CHEN Cheng, ZHAO Xincheng, LIU Haitao, WANG Chengrun. Cd enrichment and distribution in broad bean seedlings under stress of Cd combined with MWCNTs-COOH[J]. Chinese Journal of Eco-Agriculture, 2020, 28(5): 756-763. doi: 10.13930/j.cnki.cjea.190815
Citation: LIU Ling, WANG Suhang, ZHANG Jin, CHEN Cheng, ZHAO Xincheng, LIU Haitao, WANG Chengrun. Cd enrichment and distribution in broad bean seedlings under stress of Cd combined with MWCNTs-COOH[J]. Chinese Journal of Eco-Agriculture, 2020, 28(5): 756-763. doi: 10.13930/j.cnki.cjea.190815

Cd与羧基化多壁碳纳米管复合胁迫下蚕豆幼苗Cd的富集与分布

doi: 10.13930/j.cnki.cjea.190815
基金项目: 

安徽省教育厅重点项目 KJ2018A0472

安徽省重大专项项目 18030701189

安徽省高校优秀青年人才支持计划 gxyq2019078

详细信息
    作者简介:

    刘玲, 主要研究方向为植物生态学及植物逆境生理。E-mail:lliiuu494@sina.com

    通讯作者:

    汪承润, 主要研究方向为生态毒理学。E-mail:chengrunwang@163.com

  • 中图分类号: X592

Cd enrichment and distribution in broad bean seedlings under stress of Cd combined with MWCNTs-COOH

Funds: 

the Priority Projects of Education Department of Anhui Province KJ2018A0472

the Major Special Projects of Anhui Province 18030701189

the Excellent Young Talents Support Program for Colleges and Universities in Anhui Province gxyq2019078

More Information
  • 摘要: 纳米材料因大量开发、生产和应用不可避免地被释放到环境中,给生态环境和人体健康带来潜在的风险。因此为了探究羧基化多壁碳纳米管(MWCNTs-COOH)和重金属Cd双重胁迫对植物器官中Cd的富集、转运及细胞中Cd分布的影响,以及为MWCNTs-COOH与Cd复合污染对植物的毒性和生态风险性评价提供理论依据,本研究以蚕豆幼苗为试验材料,采用水培方式,设置MWCNTs-COOH(0 mg·L-1、1.5 mg·L-1、3.0 mg·L-1、6.0 mg·L-1、12.0 mg·L-1)+10.0 μmol·L-1 Cd 5个处理组,用石墨炉原子吸收光谱法测定不同处理下蚕豆幼苗根茎叶及细胞中Cd的含量,分析MWCNTs-COOH复合Cd处理下蚕豆幼苗营养器官对Cd的富集、转运及细胞内分布状况。结果表明:复合胁迫下,3种营养器官Cd含量均高于对照;根茎叶对Cd的富集、Cd富集系数及器官间(根-茎、茎-叶)的转移系数均随MWCNTs-COOH浓度升高呈先升高后降低趋势,当MWCNTs-COOH浓度为6.0 mg·L-1时,以上指标均达到最大值。同时,随着MWCNTs-COOH浓度的增大,根茎叶细胞中Cd逐渐从细胞壁向原生质体转移,加深了对细胞的毒害。综上所述,中低浓度的MWCNTs-COOH不仅可促进蚕豆根茎叶对Cd的累积及向上转运,而且也能加强细胞中Cd的转移。
  • 表  1  MWCNTs-COOH复合Cd胁迫下蚕豆幼苗各器官Cd含量

    Table  1.   Contents of Cd in various organs of broad bean seedlings under stress of MWCNTs-COOH combined with Cd  µg·g-1

    处理Treatment 叶Leaf 茎Stem 根系Root
    Cd (CK, 10.0 µmol·L-1Cd) 5.79±0.48e 17.45±0.31e 75.15±1.82c
    Cd+1.5 mg·L-1 MWCNTs-COOH 7.84±0.39d 21.10±0.22d 86.10±1.82b
    Cd+3.0 mg·L-1 MWCNTs-COOH 10.34±0.13c 24.87±0.34c 89.22±0.49ab
    Cd+6.0 mg·L-1 MWCNTs-COOH 14.02±0.16a 30.33±0.33a 90.62±1.39a
    Cd+12.0 mg·L-1 MWCNTs-COOH 11.78±0.27b 26.42±0.33b 85.66±1.06b
    同列不同小写字母表示不同处理间在P < 0.05水平差异显著。Different lowercase letters in the same column indicate significant differences among different treatments at P < 0.05 level.
    下载: 导出CSV

    表  2  MWCNTs-COOH复合Cd胁迫下蚕豆幼苗各器官对Cd的富集系数及转移系数

    Table  2.   Bioconcentration factor and translocation factor of Cd in organs of broad bean seedlings under stress of MWCNTs-COOH combined with Cd

    处理
    Treatment
    Cd富集系数
    Cd bioconcentration factor (%)
    Cd转移系数
    Cd translocation factor (%)

    root

    Stem

    Leaf
    根-茎
    From root to shoot
    茎-叶
    From stem to leaf
    Cd (CK, 10.0 µmol·L-1Cd) 5.58±0.13c 1.30±0.02e 0.43±0.04e 23.23±0.14e 33.16±2.16d
    Cd+1.5 mg·L-1 MWCNTs-COOH 6.39±0.13b 1.57±0.02d 0.58±0.03d 24.51±0.26d 37.13±1.46c
    Cd+3.0 mg·L-1 MWCNTs-COOH 6.62±0.04ab 1.85±0.02c 0.77±0.01c 27.87±0.23c 41.58±0.06b
    Cd+6.0 mg·L-1 MWCNTs-COOH 6.72±0.11a 2.25±0.03a 1.04±0.01a 33.47±0.16a 46.23±0.02a
    Cd+12.0 mg·L-1 MWCNTs-COOH 6.35±0.08b 1.96±0.03b 0.88±0.02b 30.84±0.01b 44.60±0.46ab
    同列不同小写字母表示不同处理间在P < 0.05水平差异显著。Different lowercase letters in the same column indicate significant differences among different treatments at P < 0.05 level.
    下载: 导出CSV

    表  3  MWCNTs-COOH复合Cd胁迫下蚕豆根细胞亚显微结构Cd含量及分配比例

    Table  3.   Cd contents and distribution ratios of submicrostructure in broad bean root cells under stress of MWCNTs-COOH combined with Cd

    处理
    Treatment
    Cd含量
    Cd content (µg·g-1)
    分配比例
    Distribution ratio (%)
    细胞壁
    F1 Cell wall
    原生质
    F2 Protoplast
    细胞壁
    F1 Cell wall
    原生质体
    F2 Protoplast
    Cd (CK, 10.0 µmol·L-1Cd) 7.51±0.33d 4.04±0.33e 67.03±3.64a 32.98±3.64d
    Cd+1.5 mg·L-1 MWCNTs-COOH 8.68±0.04bc 6.41±0.25d 57.52±0.87b 42.49±0.87c
    Cd+3.0 mg·L-1 MWCNTs-COOH 8.99±0.11ab 8.59±0.18c 51.14±0.23c 48.86±0.23b
    Cd+6.0 mg·L-1 MWCNTs-COOH 9.28±0.06a 12.23±0.16a 43.14±0.16d 56.86±0.16a
    Cd+12.0 mg·L-1 MWCNTs-COOH 8.42±0.13c 10.20±0.05b 45.23±0.25d 54.77±0.25a
    同列不同小写字母表示不同处理间在P < 0.05水平差异显著。Different lowercase letters in the same column indicate significant differences among different treatments at P < 0.05 level.
    下载: 导出CSV

    表  4  MWCNTs-COOH复合Cd胁迫下蚕豆茎细胞亚显微结构Cd含量及分配比例

    Table  4.   Cd contents and distribution ratios of submicrostructure in broad bean stem cells under stress of MWCNTs-COOH combined with Cd

    处理
    Treatment
    Cd含量
    Cd content (µg·g-1)
    分配比例
    Distribution ratio (%)
    细胞壁
    F1 Cell wall
    原生质
    F2 Protoplast
    细胞壁
    F1 Cell wall
    原生质体
    F2 Protoplast
    Cd (CK, 10.0 µmol·L-1Cd) 2.23±0.07d 2.14±0.10d 51.04±0.36a 48.97±0.36d
    Cd+1.5 mg·L-1 MWCNTs-COOH 2.79±0.08c 3.23±0.23c 46.26±1.03b 53.74±1.03c
    Cd+3.0 mg·L-1 MWCNTs-COOH 3.19±0.13b 4.02±0.07b 44.24±0.55c 55.76±0.55b
    Cd+6.0 mg·L-1 MWCNTs-COOH 3.71±0.17a 4.80±0.08a 43.60±0.67bc 56.40±0.67bc
    Cd+12.0 mg·L-1 MWCNTs-COOH 3.29±0.03b 4.46±0.12a 42.49±0.45d 57.52±0.45a
    同列不同小写字母表示不同处理间在P < 0.05水平差异显著。Different lowercase letters in the same column indicate significant differences among different treatments at P < 0.05 level.
    下载: 导出CSV

    表  5  MWCNTs-COOH复合Cd胁迫下蚕豆叶细胞亚显微结构Cd含量及分配比例

    Table  5.   Cd contents and distribution ratio of submicrostructure in broad bean leaf cells under stress of MWCNTs-COOH combined with Cd

    处理
    Treatment
    Cd含量
    Cd content (µg·g-1)
    分配比例
    Distribution ratio (%)
    细胞壁F1 Cell wall 原生质F2 Protoplast 细胞壁F1 Cell wall 原生质体F2 Protoplast
    Cd (CK, 10.0 µmol·L-1Cd) 0.51±0.06e 0.45±0.02e 54.45±0.01a 46.66±1.58c
    Cd+1.5 mg·L-1 MWCNTs-COOH 0.77±0.03d 0.78±0.01d 49.83±0.69b 50.17±0.69b
    Cd+3.0 mg·L-1 MWCNTs-COOH 1.01±0.04c 1.13±0.05c 47.19±0.22c 52.82±0.22a
    Cd+6.0 mg·L-1 MWCNTs-COOH 1.39±0.03a 1.67±0.08a 45.44±0.76d 54.57±0.76a
    Cd+12.0 mg·L-1 MWCNTs-COOH 1.14±0.06b 1.33±0.06b 46.04±0.33cd 53.97±0.33a
    同列不同小写字母表示不同处理间在P < 0.05水平差异显著。Different lowercase letters in the same column indicate significant differences among different treatments at P < 0.05 level.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-11-19
  • 录用日期:  2020-02-02
  • 刊出日期:  2020-05-01

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