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Type: Journal article
Title: Arsenic uptake and toxicity in plants: integrating mycorrhizal influences
Author: Smith, S.
Christophersen, H.
Pope, S.
Smith, F.
Citation: Plant and Soil: international journal on plant-soil relationships, 2010; 327(1):1-21
Publisher: Kluwer Academic Publ
Issue Date: 2010
ISSN: 0032-079X
Statement of
Sally E. Smith, Helle M. Christophersen, Suzanne Pope and F. Andrew Smith
Abstract: Arsenic (As) contamination of soil and water is a global problem that impacts on many areas of biology. This review firstly covers aspects of soil chemistry and soil-plant interactions relevant to the ways plants take up As (particularly arsenate (As(V)) from aerobic soils, with especial attention to As-phosphorus (P) interactions. It then assesses the extent to which studies of plant As tolerance based on short-term uptake of As(V) from nutrient solutions can be extrapolated to longer-term growth in contaminated soil. Mycorrhizal symbioses are then highlighted, because they are formed by ~ 90% of higher plants, often with increased uptake of phosphate (Pi) compared with non-mycorrhizal (NM) counterparts. It is therefore likely that mycorrhizas influence As(V) uptake. Published work shows that arbuscular mycorrhizal (AM) plants (the most common mycorrhizal type) have higher P/As ratios than NM plants, and this would be expected to affect sensitivity to soil As. We discuss ways in which higher P/As selectivity might result from differential operation of P and As uptake pathways in AM compared with NM plants, taking into account new understanding of P uptake mechanisms. We also give suggestions for future research required to increase understanding of mechanisms of As(V) uptake, and its interactions with plant P. © Springer Science + Business Media B.V. 2009.
Keywords: Arsenic
Mechanisms of plant tolerance
Soil toxicity.
Rights: © Springer Science + Business Media B.V. 2009
DOI: 10.1007/s11104-009-0089-8
Grant ID: ARC
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Appears in Collections:Aurora harvest
Soil and Land Systems publications

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