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Ureide metabolism in Arabidopsis thaliana is modulated by C:N balance.

Authors
  • Lescano, Ignacio1
  • Devegili, Andrés Matías2
  • Martini, Carolina2, 3
  • Tessi, Tomás María2
  • González, Claudio Alejandro2, 3
  • Desimone, Marcelo2, 3
  • 1 Multidisciplinary Institute of Plant Biology, National University of Córdoba, CONICET, Vélez Sarsfield Av. 299, X5000HUA, Córdoba, Argentina. [email protected] , (Argentina)
  • 2 Multidisciplinary Institute of Plant Biology, National University of Córdoba, CONICET, Vélez Sarsfield Av. 299, X5000HUA, Córdoba, Argentina. , (Argentina)
  • 3 Plant Physiology Chair, Department of Physiology. Faculty of Exact, Physical and Natural Sciences, National University of Córdoba, Vélez Sarsfield Av. 299, X5000HUA, Córdoba, Argentina. , (Argentina)
Type
Published Article
Journal
Journal of plant research
Publication Date
Sep 01, 2020
Volume
133
Issue
5
Pages
739–749
Identifiers
DOI: 10.1007/s10265-020-01215-x
PMID: 32740857
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Plants can respond and adapt to changes in the internal content of carbon and nitrogen by using organic compounds that widely differ in their carbon/nitrogen ratio. Among them, the amides asparagine and glutamine are believed to be preferred by most plants, including Arabidopsis. However, increases in the ureides allantoin and/or allantoate concentrations have been observed in different plant species under several environmental conditions. In this work, changes in the ratio between carbon skeletons and reduced nitrogen were investigated by varying the concentrations of nitrogen and sucrose in the growth media. Allantoin accumulation was observed when plants were grown in media with high ammonia concentrations. This increase was reverted by adding sucrose as additional carbon source. Moreover, mutant plants with a decreased capability to degrade allantoin showed a compromised growth compared to WT in ammonia supplemented media. Together, our results indicate that allantoin accumulation is induced by low carbon/nitrogen ratio and suggest that its degradation is critical for proper plant growth and development.

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