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Non-structural carbohydrates mediate seasonal water stress across Amazon forests

Author

Listed:
  • Caroline Signori-Müller

    (University of Campinas
    University of Leeds)

  • Rafael S. Oliveira

    (Institute of Biology, University of Campinas)

  • Fernanda de Vasconcellos Barros

    (University of Exeter
    University of Campinas)

  • Julia Valentim Tavares

    (University of Leeds)

  • Martin Gilpin

    (University of Leeds)

  • Francisco Carvalho Diniz

    (University of Leeds)

  • Manuel J. Marca Zevallos

    (Universidad Nacional de San Antonio Abad del Cusco
    Pontificia Universidad Católica del Perú)

  • Carlos A. Salas Yupayccana

    (Pontificia Universidad Católica del Perú)

  • Martin Acosta

    (Universidade Federal do Acre)

  • Jean Bacca

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Rudi S. Cruz Chino

    (Pontificia Universidad Católica del Perú)

  • Gina M. Aramayo Cuellar

    (Universidad Autonoma Gabriel Rene Moreno)

  • Edwin R. M. Cumapa

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Franklin Martinez

    (Universidad Autonoma Gabriel Rene Moreno)

  • Flor M. Pérez Mullisaca

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Alex Nina

    (Pontificia Universidad Católica del Perú)

  • Jesus M. Bañon Sanchez

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Leticia Fernandes Silva

    (Universidade Federal do Acre)

  • Ligia Tello

    (Universidad Nacional de San Antonio Abad del Cusco)

  • José Sanchez Tintaya

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Maira T. Martinez Ugarteche

    (Universidad Autonoma Gabriel Rene Moreno)

  • Timothy R. Baker

    (University of Leeds)

  • Paulo R. L. Bittencourt

    (University of Exeter
    University of Campinas)

  • Laura S. Borma

    (National Institute for Space Research)

  • Mauro Brum

    (University of Campinas
    University of Arizona)

  • Wendeson Castro

    (Universidade Federal do Acre)

  • Eurídice N. Honorio Coronado

    (Instituto de Investigaciones de la Amazonia Peruana)

  • Eric G. Cosio

    (Sección Química, Pontificia Universidad Católica del Perú)

  • Ted R. Feldpausch

    (University of Exeter)

  • Letícia d’Agosto Miguel Fonseca

    (National Institute for Space Research)

  • Emanuel Gloor

    (University of Leeds)

  • Gerardo Flores Llampazo

    (Universidad Nacional Jorge Basadre de Grohmann)

  • Yadvinder Malhi

    (University of Oxford)

  • Abel Monteagudo Mendoza

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Victor Chama Moscoso

    (Universidad Nacional de San Antonio Abad del Cusco)

  • Alejandro Araujo-Murakami

    (Universidad Autonoma Gabriel Rene Moreno)

  • Oliver L. Phillips

    (University of Leeds)

  • Norma Salinas

    (Sección Química, Pontificia Universidad Católica del Perú
    University of Oxford)

  • Marcos Silveira

    (Universidade Federal do Acre)

  • Joey Talbot

    (Institute for Transport Studies, University of Leeds)

  • Rodolfo Vasquez

    (Jardín Botánico de Missouri)

  • Maurizio Mencuccini

    (CREAF, Universidad Autonoma de Barcelona
    ICREA)

  • David Galbraith

    (University of Leeds)

Abstract

Non-structural carbohydrates (NSC) are major substrates for plant metabolism and have been implicated in mediating drought-induced tree mortality. Despite their significance, NSC dynamics in tropical forests remain little studied. We present leaf and branch NSC data for 82 Amazon canopy tree species in six sites spanning a broad precipitation gradient. During the wet season, total NSC (NSCT) concentrations in both organs were remarkably similar across communities. However, NSCT and its soluble sugar (SS) and starch components varied much more across sites during the dry season. Notably, the proportion of leaf NSCT in the form of SS (SS:NSCT) increased greatly in the dry season in almost all species in the driest sites, implying an important role of SS in mediating water stress in these sites. This adjustment of leaf NSC balance was not observed in tree species less-adapted to water deficit, even under exceptionally dry conditions. Thus, leaf carbon metabolism may help to explain floristic sorting across water availability gradients in Amazonia and enable better prediction of forest responses to future climate change.

Suggested Citation

  • Caroline Signori-Müller & Rafael S. Oliveira & Fernanda de Vasconcellos Barros & Julia Valentim Tavares & Martin Gilpin & Francisco Carvalho Diniz & Manuel J. Marca Zevallos & Carlos A. Salas Yupaycca, 2021. "Non-structural carbohydrates mediate seasonal water stress across Amazon forests," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22378-8
    DOI: 10.1038/s41467-021-22378-8
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