Non-structural carbohydrates mediate seasonal water stress across Amazon forests.

Autor: Signori-Müller C; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Biologia Vegetal, University of Campinas, Campinas, Brazil. carol.signori@gmail.com.; School of Geography, University of Leeds, Leeds, UK. carol.signori@gmail.com., Oliveira RS; Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil., Barros FV; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK.; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Ecologia, University of Campinas, Campinas, Brazil., Tavares JV; School of Geography, University of Leeds, Leeds, UK., Gilpin M; School of Geography, University of Leeds, Leeds, UK., Diniz FC; School of Geography, University of Leeds, Leeds, UK., Zevallos MJM; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru.; Pontificia Universidad Católica del Perú, Lima, Perú., Yupayccana CAS; Pontificia Universidad Católica del Perú, Lima, Perú., Acosta M; Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais, Universidade Federal do Acre, Rio Branco, Brazil., Bacca J; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Chino RSC; Pontificia Universidad Católica del Perú, Lima, Perú., Cuellar GMA; Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Santa Cruz, Bolivia., Cumapa ERM; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Martinez F; Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Santa Cruz, Bolivia., Mullisaca FMP; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Nina A; Pontificia Universidad Católica del Perú, Lima, Perú., Sanchez JMB; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., da Silva LF; Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais, Universidade Federal do Acre, Rio Branco, Brazil., Tello L; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Tintaya JS; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Ugarteche MTM; Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Santa Cruz, Bolivia., Baker TR; School of Geography, University of Leeds, Leeds, UK., Bittencourt PRL; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK.; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Ecologia, University of Campinas, Campinas, Brazil., Borma LS; Earth System Science Centre, National Institute for Space Research, São José dos Campos, Brazil., Brum M; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Ecologia, University of Campinas, Campinas, Brazil.; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA., Castro W; Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais, Universidade Federal do Acre, Rio Branco, Brazil., Coronado ENH; Instituto de Investigaciones de la Amazonia Peruana, Iquitos, Peru., Cosio EG; Sección Química, Pontificia Universidad Católica del Perú, Lima, Peru., Feldpausch TR; Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, UK., Fonseca LDM; Earth System Science Centre, National Institute for Space Research, São José dos Campos, Brazil., Gloor E; School of Geography, University of Leeds, Leeds, UK., Llampazo GF; Universidad Nacional Jorge Basadre de Grohmann, Tacna, Peru., Malhi Y; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK., Mendoza AM; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Moscoso VC; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Araujo-Murakami A; Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Santa Cruz, Bolivia., Phillips OL; School of Geography, University of Leeds, Leeds, UK., Salinas N; Sección Química, Pontificia Universidad Católica del Perú, Lima, Peru.; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, UK., Silveira M; Programa de Pós-Graduação em Ecologia e Manejo de Recursos Naturais, Universidade Federal do Acre, Rio Branco, Brazil., Talbot J; Institute for Transport Studies, University of Leeds, Leeds, UK., Vasquez R; Jardín Botánico de Missouri, Pasco, Peru., Mencuccini M; CREAF, Universidad Autonoma de Barcelona, Barcelona, Spain.; ICREA, Barcelona, Spain., Galbraith D; School of Geography, University of Leeds, Leeds, UK.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2021 Apr 19; Vol. 12 (1), pp. 2310. Date of Electronic Publication: 2021 Apr 19.
DOI: 10.1038/s41467-021-22378-8
Abstrakt: 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.
Databáze: MEDLINE
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