Plant organic nitrogen nutrition: costs, benefits, and carbon use efficiency. Tünnermann, L., Aguetoni Cambui, C., Franklin, O., Merkel, P., Näsholm, T., & Gratz, R. New Phytologist, November, 2024. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.20285![Plant organic nitrogen nutrition: costs, benefits, and carbon use efficiency [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Differences in soil mobility and assimilation costs between organic and inorganic nitrogen (N) compounds would hypothetically induce plant phenotypic plasticity to optimize acquisition of, and performance on, the different N forms. Here we evaluated this hypothesis experimentally and theoretically. We grew Arabidopsis in split-root setups combined with stable isotope labelling to study uptake and distribution of carbon (C) and N from l-glutamine (l-gln) and NO3− and assessed the effect of the N source on biomass partitioning and carbon use efficiency (CUE). Analyses of stable isotopes showed that 40–48% of C acquired from l-gln resided in plants, contributing 7–8% to total C of both shoots and roots. Plants grown on l-gln exhibited increased root mass fraction and root hair length and a significantly lower N uptake rate per unit root biomass but displayed significantly enhanced CUE. Our data suggests that organic N nutrition is linked to a particular phenotype with extensive growth of roots and root hairs that optimizes for uptake of less mobile N forms. Increased CUE and lower N uptake per unit root growth may be key facets linked to the organic N phenotype.
@article{tunnermann_plant_2024,
title = {Plant organic nitrogen nutrition: costs, benefits, and carbon use efficiency},
copyright = {© 2024 The Author(s). New Phytologist © 2024 New Phytologist Foundation.},
issn = {1469-8137},
shorttitle = {Plant organic nitrogen nutrition},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/nph.20285},
doi = {10.1111/nph.20285},
abstract = {Differences in soil mobility and assimilation costs between organic and inorganic nitrogen (N) compounds would hypothetically induce plant phenotypic plasticity to optimize acquisition of, and performance on, the different N forms. Here we evaluated this hypothesis experimentally and theoretically. We grew Arabidopsis in split-root setups combined with stable isotope labelling to study uptake and distribution of carbon (C) and N from l-glutamine (l-gln) and NO3− and assessed the effect of the N source on biomass partitioning and carbon use efficiency (CUE). Analyses of stable isotopes showed that 40–48\% of C acquired from l-gln resided in plants, contributing 7–8\% to total C of both shoots and roots. Plants grown on l-gln exhibited increased root mass fraction and root hair length and a significantly lower N uptake rate per unit root biomass but displayed significantly enhanced CUE. Our data suggests that organic N nutrition is linked to a particular phenotype with extensive growth of roots and root hairs that optimizes for uptake of less mobile N forms. Increased CUE and lower N uptake per unit root growth may be key facets linked to the organic N phenotype.},
language = {en},
urldate = {2024-11-22},
journal = {New Phytologist},
author = {Tünnermann, Laura and Aguetoni Cambui, Camila and Franklin, Oskar and Merkel, Patrizia and Näsholm, Torgny and Gratz, Regina},
month = nov,
year = {2024},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1111/nph.20285},
keywords = {Arabidopsis thaliana, amino acids, carbon use efficiency, glutamine, organic nitrogen, root hair},
}
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