Non-structural carbohydrates mediate seasonal water stress across Amazon forests
| العنوان: | Non-structural carbohydrates mediate seasonal water stress across Amazon forests |
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| المؤلفون: | Martin Acosta, Timothy R. Baker, José Sanchez Tintaya, Ligia Tello, Eric G. Cosio, David W. Galbraith, Carlos A. Salas Yupayccana, Letícia Fernandes da Silva, Emanuel Gloor, Gina M Aramayo Cuellar, Mauro Brum, Rudi S Cruz Chino, Edwin R M Cumapa, Eurídice N. Honorio Coronado, Letícia d’Agosto Miguel Fonseca, Marcos Silveira, Jesus M Bañon Sanchez, Rodolfo Vasquez, Norma Salinas, Joey Talbot, Alex Nina, Paulo R. L. Bittencourt, Maira T Martinez Ugarteche, Oliver L. Phillips, Francisco Carvalho Diniz, Manuel J. Marca Zevallos, Jean Bacca, Ted R. Feldpausch, Martin Gilpin, Rafael S. Oliveira, Laura S. Borma, Julia Valentim Tavares, Victor Chama Moscoso, Gerardo Flores Llampazo, Wendeson Castro, Yadvinder Malhi, Fernanda de V. Barros, Caroline Signori-Müller, Maurizio Mencuccini, Franklin Martinez, Abel Monteagudo Mendoza, Flor Maria Perez Mullisaca, Alejandro Araujo-Murakami |
| المساهمون: | University of St Andrews. School of Geography & Sustainable Development |
| المصدر: | Nature Communications Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021) |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0106 biological sciences, 010504 meteorology & atmospheric sciences, QH301 Biology, Ecophysiology, General Physics and Astronomy, Forests, 01 natural sciences, Trees, Tropical climate, Dry season, Peru, SDG 13 - Climate Action, reproductive and urinary physiology, Multidisciplinary, Geography, Amazon rainforest, food and beverages, Tropical ecology, Droughts, Carbohydrate Metabolism, Seasons, Brazil, Wet season, Bolivia, Science, Climate Change, Carbohydrates, Climate change, General Biochemistry, Genetics and Molecular Biology, Article, QH301, Precipitation, Sugar, 0105 earth and related environmental sciences, Tree canopy, Tropical Climate, fungi, Water, DAS, General Chemistry, nervous system diseases, Plant Leaves, Natural variation in plants, nervous system, Agronomy, Plant stress responses, Forest ecology, Sugars, 010606 plant biology & botany |
| الوصف: | 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. The role of non-structural carbohydrates (NSC) in mediating the impacts of drought in tropical trees is unclear. Here, the authors analyse leaf and branch NSC in 82 Amazon tree species across a Basin-wide precipitation gradient, finding that allocation of leaf NSC to soluble sugars is higher in drier sites and is coupled to tree hydraulic status. |
| وصف الملف: | application/pdf |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e93dddfa26a0d223427f71cd6ce3e516 https://pubmed.ncbi.nlm.nih.gov/33875648 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e93dddfa26a0d223427f71cd6ce3e516 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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