| 佘 玮,崔国贤,赵丹博,肖呈祥.锌、铁缺失对苎麻吸收及转运重金属镉的影响[J].农业环境科学学报,2014,33(2):283-287. |
| 锌、铁缺失对苎麻吸收及转运重金属镉的影响 |
| Cadmium Uptake and Transportation in Two Ramie Cultivars Under Zinc and Iron Deficiency |
| |
| DOI：10.11654/jaes.2014.02.012 |
| 中文关键词: 苎麻 镉吸收 锌 铁 转运 |
| 英文关键词: ramie Cd concentration Zn Fe transportation |
| 基金项目: |
|
| 摘要点击次数: 1987 |
| 全文下载次数: 2257 |
| 中文摘要: |
| 通过连续两季盆栽试验，研究锌、铁对2个苎麻品种中苎一号和湘苎三号吸收及转运重金属镉的影响。结果表明，2个苎麻品种在镉胁迫（5 mg·kg-1）下表现不同。锌、铁能促进苎麻的生长，无锌、铁供应时，镉胁迫下的2个苎麻品种与对照相比，株高下降10.24%～21.64%，茎叶干重下降 1.02%～6%，根干重下降2.04%～12.24%。苎麻各部位镉含量大小依次是根>茎>叶。锌、铁显著影响苎麻镉含量，锌、铁缺失促使苎麻吸收更多的镉。无锌和无铁供应显著增加了苎麻体内镉积累量，无锌供应时镉积累量达最大值。锌、铁对苎麻转运镉产生抑制效应，与对照相比，无锌和无铁供应时苎麻根-叶和根-茎的转运系数增加了4%～24%，锌、铁缺失加剧镉从苎麻地下部向地上部转运。 |
| 英文摘要: |
| Ramie（Boehmeria nivea） is a China-originated perennial herb with high biomass and elevated cadmium（Cd） tolerance. Ramie fibers are mainly produced as textile materials, hence minimizing the potential hazard of toxic metals in food chain. This study was carried out in hydroponic conditions to test the effects of Zn and Fe deficiency on Cd concentrations and distribution in two ramie cultivars. Four Zn and/or Fe treatments with Cd level at 5 mg·kg-1 were used, ①no Zn plus Fe（+Fe-Zn）；②no Fe plus Zn（-Fe+Zn）；③no Fe or Zn（-Fe-Zn）；④CK（+Fe+Zn）. Cadmium concentration, translocation and distribution were varied between two ramie cultivars. Compared with the CK, plant height, biomass of stem and leaf, biomass of root for 2 ramie cultivars in Zn and/or Fe deficiency were significantly reduced by 10.24%～21.64%, 1.02%～6%, 2.04%～12.24% respectively（P<0.05）. Supplying normal Zn and Fe increased the height and biomass of ramie, while Zn and/or Fe-deficient decreased the biomass of ramie. Cadmium concentrations of ramie were roots>stems>leaves. Treatments with Zn or Fe-deficient promoted Cd concentration and accumulation in two ramie cultivars. Zn and/or Fe deficiency increased TFroot to leaf and TFroot to stem. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
