Increase of multi-metal tolerance of three leguminous plants by arbuscular mycorrhizal fungi colonization

Ai-Jun LIN, Xu-Hong ZHANG, Ming Hung WONG, Zhi-Hong YE, Lai-Qing LOU, You-Shan WANG, Yong-Guan ZHU

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Abstract

A greenhouse pot experiment was conducted to investigate the effects of the colonization of arbuscular mycorrhizal fungus (AMF) Glomus mosseae on the growth and metal uptake of three leguminous plants (Sesbania rostrata, Sesbania cannabina, Medicago sativa) grown in multi-metal contaminated soil. AMF colonization increased the growth of the legumes, indicating that AMF colonization increased the plant's resistance to heavy metals. It also significantly stimulated the formation of root nodules and increased the N and P uptake of all of the tested leguminous plants, which might be one of the tolerance mechanisms conferred by AMF. Compared with the control, colonization by G. mosseae decreased the concentration of metals, such as Cu, in the shoots of the three legumes, indicating that the decreased heavy metals uptake and growth dilution were induced by AMF treatment, thereby reducing the heavy metal toxicity to the plants. The root/shoot ratios of Cu in the three legumes and Zn in M. sativa were significantly increased (P < 0.05) with AMF colonization, indicating that heavy metals were immobilized by the mycorrhiza and the heavy metal translocations to the shoot were decreased. Copyright © 2007 Springer Science+Business Media B.V.

Original languageEnglish
Pages (from-to)473-481
JournalEnvironmental Geochemistry and Health
Volume29
Issue number6
DOIs
Publication statusPublished - Dec 2007

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Citation

Lin, A.-J., Zhang, X.-H., Wong, M.-H., Ye, Z.-H., Lou, L.-Q., Wang, Y.-S., & Zhu, Y.-G. (2007). Increase of multi-metal tolerance of three leguminous plants by arbuscular mycorrhizal fungi colonization. Environmental Geochemistry and Health, 29(6), 473-481. doi: 10.1007/s10653-007-9116-y

Keywords

  • Sesbania
  • Medicago sativa
  • Glomus mosseae
  • A. caulinodans
  • Heavy metals