Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/91003
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: How important is the mycorrhizal pathway for plant Zn uptake?
Author: Watts-Williams, S.
Smith, F.
McLaughlin, M.
Patti, A.
Cavagnaro, T.
Citation: Plant and Soil, 2015; 390(1-2):157-166
Publisher: Springer
Issue Date: 2015
ISSN: 0032-079X
1573-5036
Statement of
Responsibility: 
Stephanie J. Watts-Williams, F. Andrew Smith, Michael J. McLaughlin, Antonio F. Patti, Timothy R. Cavagnaro
Abstract: INTRODUCTION Formation of arbuscular mycorrhizas can enhance plant uptake of immobile nutrients such as zinc (Zn) and phosphorus (P). Enhancement of Zn uptake by arbuscular mycorrhizal (AM) fungi on Zn-deficient soils has been studied previously, however, the quantity of Zn that is contributed by the AM pathway of uptake to the plant has not previously been reported for soil of any Zn status. METHODS We grew a mycorrhiza-defective mutant tomato (Solanum lycopersicum L.) genotype (rmc) and its mycorrhizal wild-type progenitor (76R) in pots containing a hyphal compartment (HC) accessible only by the external hyphae of AM fungi, and containing the radioisotope 65Zn. This was repeated at three soil Zn concentrations, ranging from low to high. We estimated the amount of Zn delivered via both the AM and direct (root) pathways. RESULTS Up to 24 % of Zn in the shoots of the AM plants was delivered via the AM pathway at the lowest soil Zn treatment. This decreased significantly, to 8 %, as soil Zn concentration increased. No 65Zn was detected in the tissues of the non-mycorrhizal genotype. CONCLUSIONS The relative contribution to shoot Zn by the AM pathway of uptake was highest when soil Zn was low, and decreased with increasing soil Zn concentration.
Keywords: Arbuscular mycorrhizal (AM) uptake; Arbuscular mycorrhizas; Phosphorus; Plant nutrition; Tomato (Solanum lycopersicum L.); Zinc
Rights: © Springer International Publishing Switzerland 2015
RMID: 0030021725
DOI: 10.1007/s11104-014-2374-4
Grant ID: http://purl.org/au-research/grants/arc/FT120100463
Appears in Collections:Agriculture, Food and Wine publications

Files in This Item:
File Description SizeFormat 
hdl_91003.pdfAccepted version687.26 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.