Uptake of Zn by arbuscular mycorrhizal white clover from Zn-contaminated soil

Zhu, Yan; Christie, Peter; Laidlaw, A. S.

doi:10.1016/s0045-6535(00)00125-9

Cited by 118 publications

(69 citation statements)

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“…Our results are consistent with the suggestion (Chen et al, 2001;Li and Christie, 2001;Zhu et al, 2001) that AM fungi immobilize heavy metals such as Zn in moderately polluted soils. This decreases soil solution Zn concentration and root and shoot Zn uptake, and increases residual Zn remaining in the soil after plant growth.…”

Section: Discussionsupporting

confidence: 93%

“…In fact, application of 1000 mg Zn kg À1 was included as a treatment in the present experiment, but all of the seedlings (both AM and non-mycorrhizal) died in this high-Zn treatment and the treatment has not been included in this paper. On the other hand, Zhu et al (2001) grew white clover plants in the same soil mixed with sand and amended with various rates of Zn up to 400 mg kg À1 . The highest application rate led to a small decrease (P < 0:05) in plant yield, but the plants had grown for 20 weeks, three times longer than in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Selective (lower) fungal transfer of non-essential metals has been suggested for Cd, as indicated by enhanced root/shoot Cd ratios in AM plants (Joner and Leyval, 1997). Similarly, Zhu et al (2001) observed increased immobilization of Zn in or near the roots of AM white clover with increasing application of ZnSO 4 to the soil. The mechanism involved could be direct intracellular precipitation of metal cations with phosphate, or adsorption of metal ions on hyphal walls.…”

Section: Introductionmentioning

confidence: 91%

“…These associations have the capability of increasing host plant uptake of immobile elements such as P and Zn when they are in short supply (Thompson, 1996), but are also capable of lowering plant uptake of various heavy metals when they are available in excessive quantities in the soil Zhu et al, 2001). The mechanisms involved in decreased uptake of metals by AM plants are largely unknown.…”

Section: Introductionmentioning

confidence: 99%

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Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil amended with zinc and phosphorus

Christie

2003

Chemosphere

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Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil ameded with zinc and phosphorus Bi, Y. L., Li, X. L., & Christie, P. (2003). Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil ameded with zinc and phosphorus. Chemosphere, 50(6)(6), 831-837. DOI: 10.1016/S0045-6535(02)00227-8 Published in: ChemosphereQueen's University Belfast -Research Portal: Link to publication record in Queen's University Belfast Research Portal General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights.Take down policy The Research Portal is Queen's institutional repository that provides access to Queen's research output. Every effort has been made to ensure that content in the Research Portal does not infringe any person's rights, or applicable UK laws. If you discover content in the Research Portal that you believe breaches copyright or violates any law, please contact openaccess@qub.ac.uk. AbstractIn a pot experiment, red clover (Trifolium pratense) was grown in sterilized Zn-amended low available P soil (0, 50 or 400 mg Zn kg À1 ) with or without 100 mg kg À1 added P and with or without inoculation with the arbuscular mycorrhizal (AM) fungus G. mosseae. When the plants were harvested after 40 days, AM colonization of the roots was still at an early stage, with only 14-38% of total root length colonized on average. AM colonization was highest in low-P soil, and was lowest in soil amended with 400 mg Zn kg À1 . Shoot yields were highest in AM plants with added P, but root yields were unaffected by AM inoculation. Shoot and root yields were higher with 100 mg added P kg À1 soil, but lower with 400 mg Zn kg À1 than 50 mg Zn kg À1 or controls unamended with Zn. Shoot and root P concentrations were seldom higher in AM plants, but shoot P offtakes were higher in AM plants with added P.Concentrations of Zn and Cu were much higher in the roots than in the shoots. Shoot and root Zn and shoot Cu were lower, but root Cu was higher, in AM plants. Soil residual pH after plant growth was higher in AM treatments, and residual total Zn was also higher, indicating lower Zn uptake by AM plants. Soil solution pH was higher in AM treatments, and soil solution Zn was lower in the presence of mycorrhiza. The results are discussed in terms of AM protection of the plants against excessive shoot Zn uptake.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Influence of early stages of arbuscular mycorrhiza on uptake of zinc and phosphorus by red clover from a low-phosphorus soil amended with zinc and phosphorus

Christie

2003

Chemosphere

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“…Results from the present study demonstrated that both plant species were highly dependent on mycorrhizal colonization for growth when grown in Cu mine tailings. Their mycorrhizal responsiveness (in terms of growth improvement) was similar to that of T. repens, which is known to be highly dependent on mycorrhizal colonization (Zhu et al, 2001). However, in terms of tissue P concentrations, AMF colonization only marginally increased tissue P concentrations (Fig.…”

Section: Discussionmentioning

confidence: 77%