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中国农学通报

中国农学通报 ›› 2018, Vol. 34 ›› Issue (3): 93-97.doi: 10.11924/j.issn.1000-6850.casb16120057

• 林学 园艺 园林 • 上一篇    下一篇

镉胁迫对圆叶决明幼苗生长及镉吸收的影响

黄运湘,何梨香,刘利杉,黄楚瑜   

  1. 湖南农业大学资源环境学院农业资源系,湖南农业大学资源环境学院,湖南农业大学资源环境学院,海南省琼海市农业科学研究所
  • 收稿日期:2016-12-12 修回日期:2017-07-05 接受日期:2017-07-11 出版日期:2018-02-01 发布日期:2018-02-01
  • 通讯作者: 黄运湘
  • 基金资助:
    国家科技支撑计划项目“矿区重金属污染土壤生态修复技术及示范”(2012BAC09B04)。

Cadmium Stress: Effects on Growth and Cadmium Absorption of Chamaecrista rotundifolia Seedlings

  • Received:2016-12-12 Revised:2017-07-05 Accepted:2017-07-11 Online:2018-02-01 Published:2018-02-01

摘要： 为探明圆叶决明的耐镉性，笔者采用营养液培养试验的方法，研究了不同浓度镉胁迫对圆叶决明‘CIP86134’和‘ATF3248’幼苗生长发育、矿质养分吸收、Cd的吸收累积及其分布的影响。结果表明：镉胁迫抑制圆叶决明幼苗的生长，株高和出叶速度均低于对照；降低了圆叶决明生物产量和减少Ca、Mg、Cu、Zn 的吸收。‘CIP86134’和‘ATF3248’对Cd的忍耐浓度分别为33.4 mg/kg 和33.1 mg/kg，为非耐镉性植物。通过形态诊断、生物产量、Cd 的吸收累积量等指标的比较，‘CIP86134’的耐镉能力较‘ATF3248’强。对于Cd污染土壤的生态修复来说， ‘CIP86134’ 是更为适宜的品种。

关键词: 乌饭树, 乌饭树, GA3, 种子发芽率, 发芽势, 发芽指数

Abstract: The paper aims to explore the cadmium-tolerance of Chamaecrista rotundifolia. The authors studied the effects of Cd stress on the growth and development, mineral nutrient uptake, Cd accumulation and distribution of C. rotundufolia seedlings of different varieties (CIP86134 and ATF3248) by using nutrient solution culture experiment. The results showed that: Cd stress inhibited the growth of C. rotundufolia seedling, and the plant height and leaf emergence rate were lower than that of CK, and decreased the biomass accumulation of C. rotundifolia and the absorption of Ca, Mg, Cu and Zn; CIP86134 and ATF3248 were not Cd-tolerant plants, and their tolerance of the Cd concentration was 33.4 mg/kg and 33.1 mg/kg, respectively. By comparing morphological diagnosis, biomass and the amount of Cd absorption, the tolerance ability of CIP86134 to Cd stress was stronger than that of ATF3248. CIP86134 is more suitable for the ecological restoration of Cd polluted soil.