生态与农村环境学报 ›› 2017, Vol. 33 ›› Issue (6): 555-563.doi: 10.11934/j.issn.1673-4831.2017.06.010

• 污染控制与修复 • 上一篇    下一篇

丛枝菌根真菌和纳米磁性氧化铁对玉米生长和Fe吸收的影响

曹际玲1,2,3, 冯有智1,2, 林先贵1,2   

  1. 1. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室, 江苏 南京 210008;
    2. 中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室, 江苏 南京 210008;
    3. 中国科学院大学, 北京 100049
  • 收稿日期:2016-07-22 出版日期:2017-06-25 发布日期:2017-06-15
  • 通讯作者: 林先贵,E-mail:xglin@issas.ac.cn E-mail:xglin@issas.ac.cn
  • 作者简介:曹际玲(1986-),女,山东临沂人,博士生,主要从事菌根生态效应与污染修复方面的研究。E-mail:jlcao@issas.ac.cn
  • 基金资助:

    国家自然科学基金面上项目(41371255,41301267)

Influence of Arbuscular Mycorrhizal Fungi and Iron Oxide Magnetic Nanoparticles on Maize Growth and Fe-Uptake

CAO Ji-ling1,2,3, FENG You-zhi1,2, LIN Xian-gui1,2   

  1. 1. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2. Joint Open Laboratory of Soil and the Environment, Hong Kong Baptist University & Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-07-22 Online:2017-06-25 Published:2017-06-15

摘要:

采用温室盆栽试验方法,模拟不同纳米磁性氧化铁(Fe3O4)施加水平(0.1、1.0和10.0 mg·kg-1)的土壤,研究接种丛枝菌根(arbuscular mycorrhizal,AM)真菌Glomus caledonium对玉米(Zea mays)植株生长的影响。结果表明,纳米Fe3O4在10.0 mg·kg-1施加水平下显著降低(P<0.05)玉米植株地上部和地下部生物量、AM真菌侵染率和玉米植株养分(N、P、Ca、Zn)含量,显著增加(P<0.05)玉米植株地上部Fe含量。与未接种处理相比,在10.0 mg·kg-1的纳米Fe3O4施加水平下,接种AM真菌显著提高玉米植株总Fe吸收量和地下部Fe含量(P<0.05),但显著降低Fe的转运比率和玉米植株地上部Fe含量(P<0.05),改善玉米植株体内养分含量,最终显著促进玉米植株生长(P<0.05)。该结果表明接种AM真菌可提高Fe在植物根系的分配比例,降低Fe向植株地上部的转运,从而缓解纳米Fe3O4对宿主植物的毒害作用。

关键词: 纳米Fe3O4, Glomus caledonium, 玉米, Fe吸收

Abstract:

A greenhouse pot experiment was established to investigate the effects of Glomus caledonium on maize (Zea mays) plants under differential levels (0.1, 1.0, and 10.0 mg·kg-1) of nano-iron oxide magnetic nanoparticles (Fe3O4) artificially added soils. The results indicate that the high (10.0 mg·kg-1) application of nano-Fe3O4 significantly decreased (P<0.05) plant biomass of maize, root mycorrhizal colonization rate and plant N, P, Ca, Zn concentration, but significantly increased (P<0.05) shoot Fe concentration. Compared to the corresponding non-AM fungi-inoculated treatment, inoculating Glomus caledonium significantly increased (P<0.05) root Fe concentration and individual Fe acquisition of maize plants, but significantly decreased (P<0.05) shoot Fe concentration, that eventually significantly increased (P<0.05) plant biomass of maize with the high nano-Fe3O4 applied treatment. These results indicate that AM fungi could alleviate the toxicity of nano-Fe3O4 to plants by enhancing Fe partition in roots and reducing the translocation of Fe by maize plants.

Key words: nano-Fe3O4, Glomus caledonium, maize, Fe acquisitions

中图分类号: