Changes in Metal-Chelating Metabolites Induced by Drought and a Root Microbiome in Wheat

Plants · 5 authors, 3 centres

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TL;DR

This preclinical study grew wheat seedlings with and without a Pseudomonad microbiome under normal or drought conditions, then analyzed metal-chelating metabolites in shoots and rhizosphere. Drought increased certain shoot amino acids, while microbial colonization generally reduced rhizosphere metabolites, potentially affecting plant metal bioavailability and pathogen control.

Full summary

179 CHARS

At harvest, concentrations of amino acids, low molecular weight organic acids, phenolic acids, and the wheat siderophore were measured in shoot extracts and rhizosphere solutions.

STUDY TYPE

other

SPECIALTY

agriculture

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ORIGINAL PAPER

PMC10055107

Changes in Metal-Chelating Metabolites Induced by Drought and a Root Microbiome in Wheat

Plants

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ABSTRACT

The essential metals Cu, Zn, and Fe are involved in many activities required for normal and stress responses in plants and their microbiomes. This paper focuses on how drought and microbial root colonization influence shoot and rhizosphere metabolites with metal-chelation properties. Wheat seedlings, with and without a pseudomonad microbiome, were grown with normal watering or under water-deficit conditions. At harvest, metal-chelating metabolites (amino acids, low molecular weight organic acids (LMWOAs), phenolic acids, and the wheat siderophore) were assessed in shoots and rhizosphere solutions. Shoots accumulated amino acids with drought, but metabolites changed little due to microbial colonization, whereas the active microbiome generally reduced the metabolites in the rhizosphere solutions, a possible factor in the biocontrol of pathogen growth. Geochemical modeling with the rhizosphere metabolites predicted Fe formed Fe–Ca–gluconates, Zn was mainly present as ions, and Cu was chelated with the siderophore 2′-deoxymugineic acid, LMWOAs, and amino acids. Thus, changes in shoot and rhizosphere metabolites caused by drought and microbial root colonization have potential impacts on plant vigor and metal bioavailability.

CITATION EXPORT

Anne J. Anderson, Joshua M. Hortin, Astrid R. Jacobson et al.. Changes in Metal-Chelating Metabolites Induced by Drought and a Root Microbiome in Wheat. Plants. (2023). https://doi.org/10.3390/plants12061209

AUTHORS

5 · 3 CENTRES

Anne J. Anderson, Joshua M. Hortin, Astrid R. Jacobson, David W. Britt, Joan E. McLean

1Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
2Utah Water Research Laboratory, Department of Civil and Environmental Engineering, Utah State University, Logan, UT 84322, USA
3Department of Plants, Soils, and Climate, Utah State University, Logan, UT 84322, USA

EDITOR / REVIEWER

Ajay Kumar