Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/126161
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Type: Journal article
Title: Effects of plant roots and arbuscular mycorrhizas on soil phosphorus leaching
Author: Tran, C.T.K.
Watts-Williams, S.J.
Smernik, R.J.
Cavagnaro, T.R.
Citation: Science of the Total Environment, 2020; 722:137847-1-137847-9
Publisher: Elsevier BV
Issue Date: 2020
ISSN: 0048-9697
1879-1026
Statement of
Responsibility: 
Cuc T.K. Tran, Stephanie J.Watts-Williams, Ronald J. Smernik, Timothy R. Cavagnaro
Abstract: While the impact of arbuscular mycorrhizal fungi (AMF) on phosphorus (P) uptake is well understood, the mechanism(s) of how these fungi affect P leaching from soil is still unclear. Here we present results of a study in which we grew a mycorrhiza-defective tomato (Solanum lycopersicum L.) genotype (named rmc) and its mycorrhizal wild-type progenitor (named 76R) in microcosms containing non-sterile soil, to examine the influence of roots and AMF on P leaching. More P was leached from the planted microcosms as compared to the plant-free controls. Further, although there was more plant biomass and greater P uptake in the mycorrhizal plant treatments, these treatments were associated with the most leaching of total P, reactive P, and dissolved organic carbon (DOC). There was a strong correlation between the total P and DOC leached, suggesting that root and fungal exudates may have affected P leaching. These findings provide new insights into the impact of roots and AMF on nutrient leaching in soils.
Keywords: Arbuscular mycorrhizal fungi
Dissolved organic carbon
Mycorrhiza-defective tomato mutant
Phosphorus
Reactive phosphorus
Unreactive phosphorus
Description: Available online 10 March 2020
Rights: © 2020 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.scitotenv.2020.137847
Grant ID: http://purl.org/au-research/grants/arc/CE140100008
Published version: http://dx.doi.org/10.1016/j.scitotenv.2020.137847
Appears in Collections:Agriculture, Food and Wine publications
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