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This article in JEQ

  1. Vol. 40 No. 2, p. 653-656
     
    Received: July 16, 2010
    Published: Mar, 2011


    * Corresponding author(s): gaoyanzheng@njau.edu.cn
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doi:10.2134/jeq2010.0320

PAHs Pass Through the Cell Wall and Partition into Organelles of Arbuscular Mycorrhizal Roots of Ryegrass

  1. Yanzheng Gao *ab,
  2. Xuezhang Caoc,
  3. Fuxing Kanga and
  4. Zhaoxia Chenga
  1. a Institute of Organic Contaminant Control and Soil Remediation, College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
    b State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
    c Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China. Received Assigned to Associate Editor Hui Li

Abstract

The subcellular process and distribution of polycyclic aromatic hydrocarbons (PAHs) in arbuscular mycorrhizal plants remains to be elucidated. This work used a greenhouse experiment to show that, accompanied by the apoplastic and symplastic water movement through the root, acenaphthene (ACE) as a representative PAH passed through the cell-wall boundary, dissolved in the cell solution, and partitioned into organelles in arbuscular mycorrhizal roots of ryegrass (Lolium multiflorum Lam.). The observed concentrations of ACE in organelles were 0.6 to 4.4 times higher than in the cell walls. The cell wall and organelles were the dominant storage domains for ACE in the root, and the distribution of ACE in cells of mycorrhizal ryegrass roots was, in descending order, cell organelles (40.8–70.8%) > cell wall (19.7–39.8%) > cell solution (9.6–20.5%).

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Copyright © 2011. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of America