Non-structural carbohydrates mediate seasonal water stress across Amazon forests
Signori-Müller, Caroline (University of Leeds. School of Geography)
Oliveira, Rafael S. (University of Campinas. Department of Plant Biology)
Barros, Fernanda de Vasconcellos (University of Campinas. Department of Plant Biology)
Tavares, Julia Valentim (University of Leeds. School of Geography)
Gilpin, Martin (University of Leeds. School of Geography)
Diniz, Francisco Carvalho (University of Leeds. School of Geography)
Zevallos, Manuel J. Marca (Pontificia Universidad Católica del Perú)
Yupayccana, Carlos A. Salas (Pontificia Universidad Católica del Perú)
Acosta, Martin (Universidade Federal do Acre)
Bacca, Jean (Universidad Nacional de San Antonio Abad del Cusco)
Chino, Rudi S. Cruz (Pontificia Universidad Católica del Perú)
Cuellar, Gina M. Aramayo (Universidad Autónoma Gabriel René Moreno (Bolívia))
Cumapa, Edwin R. M. (Universidad Nacional de San Antonio Abad del Cusco)
Martinez, Franklin (Universidad Autónoma Gabriel René Moreno (Bolívia))
Mullisaca, Flor M. Pérez (Universidad Nacional de San Antonio Abad del Cusco)
Nina, Alex (Pontificia Universidad Católica del Perú)
Sanchez, Jesus M. Bañon (Universidad Nacional de San Antonio Abad del Cusco)
da Silva, Leticia Fernandes (Universidade Federal do Acre)
Tello, Ligia (Universidad Nacional de San Antonio Abad del Cusco)
Tintaya, José Sanchez (Universidad Nacional de San Antonio Abad del Cusco)
Ugarteche, Maira T. Martinez (Universidad Autónoma Gabriel René Moreno (Bolívia))
Baker, Timothy R. (University of Leeds. School of Geography)
Bittencourt, Paulo L (University of Campinas. Department of Plant Biology)
Borma, Laura S. (National Institute for Space Research)
Brum, Mauro (University of Campinas. Department of Plant Biology)
Castro, Wendeson (Universidade Federal do Acre)
Coronado, Eurídice N. Honorio (Instituto de Investigaciones de la Amazonía Peruana)
Cosio, Eric G. (Pontificia Universidad Católica del Perú. Sección Química)
Feldpausch, Ted R. (University of Exeter. Geography)
Fonseca, Letícia d'Agosto Miguel (National Institute for Space Research. Earth System Science Centre)
Gloor, Emanuel (University of Leeds. School of Geography)
Llampazo, Gerardo Flores (Universidad Nacional Jorge Basadre de Grohmann)
Malhi, Yadvinder (University of Oxford. School of Geography and the Environment)
Mendoza, Abel Monteagudo (Universidad Nacional de San Antonio Abad del Cusco)
Moscoso, Victor Chama (Universidad Nacional de San Antonio Abad del Cusco)
Araujo-Murakami, Alejandro (Universidad Autónoma Gabriel René Moreno (Bolívia))
Phillips, Oliver L. (University of Leeds. School of Geography)
Salinas, Norma (Pontificia Universidad Católica del Perú. Sección Química)
Silveira, Marcos (Universidade Federal do Acre)
Talbot, Joey (University of Leeds. Institute for Transport Studies)
Vasquez, Rodolfo (Jardín Botánico de Missouri)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Galbraith, David (University of Leeds. School of Geography)

Data:	2021
Resum:	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.
Ajuts:	Ministerio de Economía y Competitividad CGL2013-46808-R Agencia Estatal de Investigación CGL2017-89149-C2-1-R
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Ecophysiology ; Natural variation in plants ; Plant stress responses ; Forest ecology ; Tropical ecology
Publicat a:	Nature communications, Vol. 12 (April 2021) , art. 2310, ISSN 2041-1723

DOI: 10.1038/s41467-021-22378-8
PMID: 33875648

9 p, 1.9 MB

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