Non-structural carbohydrates mediate seasonal water stress across Amazon forests

Signori-Müller, Caroline; Oliveira, Rafael S.; Barros, Fernanda Vasconcellos; Tavares, Julia Valentim; Gilpin, Martin; Diniz, Francisco Carvalho; Zevallos, Manuel J. Marca; Yupayccana, Carlos A. Salas; Acosta, Martin; Bacca, Jean; Chino, Rudi S. Cruz; Cuellar, Gina M. Aramayo; Cumapa, Edwin R. M.; Martinez, Franklin; Mullisaca, Flor M. Pérez; Nina, Alex; Sanchez, Jesus M. Bañon; da Silva, Leticia Fernandes; Tello, Ligia; Tintaya, José Sanchez; Ugarteche, Maira T. Martinez; Baker, Timothy R.; Bittencourt, Paulo L.; Borma, Laura S.; Brum, Mauro; Castro, Wendeson; Coronado, Eurídice H. Honorio; Cosio, Eric G.; Feldpausch, Ted R.; Fonseca, Letícia d'Agosto Miguel; Gloor, Emanuel; Llampazo, Gerardo Flores; Malhi, Yadvinder; Mendoza, Abel Monteagudo; Moscoso, Victor Chama; Araujo-Murakami, Alejandro; Phillips, Oliver L.; Salinas, Norma; Silveira, Marcos; Talbot, Joey; Vasquez, Rodolfo; Mencuccini, Maurizio; Galbraith, David

doi:10.1038/s41467-021-22378-8

Non-structural carbohydrates mediate seasonal water stress across Amazon forests

Journal Article · Mon Apr 19 00:00:00 EDT 2021 · Nature Communications

DOI:https://doi.org/10.1038/s41467-021-22378-8· OSTI ID:1816990

^[1]; ^[2]; Barros, Fernanda Vasconcellos ^[3]; ^[4]; Gilpin, Martin ^[4]; Diniz, Francisco Carvalho ^[4]; Zevallos, Manuel J. Marca ^[5]; Yupayccana, Carlos A. Salas ^[6]; Acosta, Martin ^[7]; Bacca, Jean ^[8]; ^[6]; Cuellar, Gina M. Aramayo ^[9]; Cumapa, Edwin R. M. ^[8]; Martinez, Franklin ^[9]; ^[8]; ^[6]; Sanchez, Jesus M. Bañon ^[8]; ^[7]; Tello, Ligia ^[8]; Tintaya, José Sanchez ^[8] more »

Univ. of Campinas (Brazil); University of Leeds (United Kingdom)
Univ. of Campinas (Brazil)
Univ. of Campinas (Brazil); Univ. of Exeter (United Kingdom)
University of Leeds (United Kingdom)
National University of Saint Anthony the Abad in Cuzco (Peru); Pontifica Universidad Catolica del Peru (Peru)
Pontifica Universidad Catolica del Peru (Peru)
Federal University of Acre (Brazil)
National University of Saint Anthony the Abad in Cuzco (Peru)
Gabriel René Moreno Autonomous University (Bolivia)
National Institute for Space Research (Brazil)
Univ. of Campinas (Brazil); Univ. of Arizona, Tucson, AZ (United States)
Instituto de Investigaciones de la Amazonía Peruana (IIAP) (Peru)
Pontificia Universidad Católica del Perú (Peru)
Univ. of Exeter (United Kingdom)
Jorge Basadre Grohmann National University
Univ. of Oxford (United Kingdom)
Pontificia Universidad Católica del Perú (Peru); Univ. of Oxford (United Kingdom)
Jardín Botánico de Missouri (Peru)
Univ. Autonoma de Barcelona (Spain); Catalan Institution for Research and Advanced Studies (ICREA) (Spain)

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 (NSC_T) concentrations in both organs were remarkably similar across communities. However, NSC_T and its soluble sugar (SS) and starch components varied much more across sites during the dry season. Notably, the proportion of leaf NSC_T in the form of SS (SS:NSC_T) 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.

View Accepted Manuscript (DOE)

Research Organization:: Atmospheric Radiation Measurement (ARM) Mobile Facility, Manaus (Brazil)

Sponsoring Organization:: USDOE

OSTI ID:: 1816990

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Non-structural carbohydrates mediate seasonal water stress across Amazon forests

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