Journal article
New Phytologist, 2023
APA
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Herndon, E. M., Richardson, J. A., Carrell, A. A., Pierce, E., & Weston, D. J. (2023). Sulfur speciation in Sphagnum peat moss modified by mutualistic interactions with cyanobacteria. New Phytologist.
Chicago/Turabian
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Herndon, Elizabeth M., Jocelyn A. Richardson, Alyssa A. Carrell, Eric Pierce, and David J Weston. “Sulfur Speciation in Sphagnum Peat Moss Modified by Mutualistic Interactions with Cyanobacteria.” New Phytologist (2023).
MLA
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Herndon, Elizabeth M., et al. “Sulfur Speciation in Sphagnum Peat Moss Modified by Mutualistic Interactions with Cyanobacteria.” New Phytologist, 2023.
BibTeX Click to copy
@article{elizabeth2023a,
title = {Sulfur speciation in Sphagnum peat moss modified by mutualistic interactions with cyanobacteria.},
year = {2023},
journal = {New Phytologist},
author = {Herndon, Elizabeth M. and Richardson, Jocelyn A. and Carrell, Alyssa A. and Pierce, Eric and Weston, David J}
}
Peat moss (Sphagnum spp.) develops mutualistic interactions with cyanobacteria by providing carbohydrates and S compounds in exchange for N-rich compounds, potentially facilitating N inputs into peatlands. Here, we evaluate how colonization of Sphagnum angustifolium hyaline cells by Nostoc muscorum modifies S abundance and speciation at the scales of individual cells and across whole leaves. For the first time, S K-edge X-ray Absorption Spectroscopy was used to identify bulk and micron-scale S speciation across isolated cyanobacteria colonies, and in colonized and uncolonized leaves. Uncolonized leaves contained primarily reduced organic S and oxidized sulfonate- and sulfate-containing compounds. Increasing Nostoc colonization resulted in an enrichment of S and changes in speciation, with increases in sulfate relative to reduced S and sulfonate. At the scale of individual hyaline cells, colonized cells exhibited localized enrichment of reduced S surrounded by diffuse sulfonate, similar to observations of cyanobacteria colonies cultured in the absence of leaves. We infer that colonization stimulates plant S uptake and the production of sulfate-containing metabolites that are concentrated in stem tissues. Sulfate compounds that are produced in response to colonization become depleted in colonized cells where they may be converted into reduced S metabolites by cyanobacteria.