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Type: Journal article
Title: Arbuscular mycorrhizas modify tomato responses to soil zinc and phosphorus addition
Author: Watts-Williams, S.
Cavagnaro, T.
Citation: Biology and Fertility of Soils, 2012; 48(3):285-294
Publisher: Springer-Verlag
Issue Date: 2012
ISSN: 0178-2762
Statement of
Stephanie J. Watts-Williams, Timothy R. Cavagnaro
Abstract: Arbuscular mycorrhizas (AM) play an important role in plant P and Zn nutrition; however, relatively few studies have directly investigated the interactive effects of these nutrients on plants. Therefore, we undertook a glasshouse experiment to study the effects of Zn and P on AM formation and functioning. A mycorrhiza defective tomato mutant (rmc) and its mycorrhizal wild-type progenitor (76R) were used in this experiment. Plants were grown in soil amended with five Zn concentrations, ranging from deficient to toxic, and two levels of P addition. The addition of Zn and P to the soil over a range of concentrations had profound effects on plant growth and nutrition and mycorrhizal colonization. Mycorrhizal benefits were the greatest when plants were grown under low soil P and Zn. Furthermore, the effect of soil Zn supply on plant growth, nutrition, and AM colonization was strongly influenced by the concentration of P in the soil. Thus, studies of AM and Zn (or other nutrients of interest) should take into account the impact of soil P concentration on the role of AM in plant Zn acquisition, under both deficient and toxic soil Zn concentrations.
Keywords: Arbuscular mycorrhizas (AM); Zinc; Phosphorus; Mycorrhiza defective tomato mutant (rmc); Solanum lycopersicum (Tomato)
Rights: © Springer-Verlag 2011
RMID: 0020138167
DOI: 10.1007/s00374-011-0621-x
Appears in Collections:Earth and Environmental Sciences publications

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