Tropical forest lianas have greater non-structural carbohydrate concentrations in the stem xylem than trees.

Autor:	Signori-Müller C; College of Life and Environmental Sciences, University of Exeter, Exeter, UK.; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Biologia Vegetal, University of Campinas, Campinas, Brazil.; School of Geography, University of Leeds, Leeds, UK., Galbraith D; School of Geography, University of Leeds, Leeds, UK., Tavares JV; School of Geography, University of Leeds, Leeds, UK.; Department of Ecology and Genetics, Uppsala University, Sweden., Reis SM; Programa de Pós-Graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), UFAM-UNEMAT, Nova Xavantina, Brazil.; Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil.; School of Geography and the Environment, Environmental Change Institute, University of Oxford, Oxford, UK., Diniz FC; School of Geography, University of Leeds, Leeds, UK., Gilpin M; School of Geography, University of Leeds, Leeds, UK., Marimon BS; Programa de Pós-Graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), UFAM-UNEMAT, Nova Xavantina, Brazil.; Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil., van der Heijden GMF; School of Geography, University of Nottingham, Nottingham, UK., Borges C; Programa de Pós-Graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), UFAM-UNEMAT, Nova Xavantina, Brazil.; Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil., Cintra BBL; School of Geography, University of Leeds, Leeds, UK.; School of Geography, Earth and Environmental Sciences, University of Birmingham., Mião S; Department of Plant Biology, Institute of Biology, Programa de Pós Graduação em Biologia Vegetal, University of Campinas, Campinas, Brazil., Morandi PS; Programa de Pós-Graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), UFAM-UNEMAT, Nova Xavantina, Brazil.; Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil., Nina A; Pontificia Universidad Católica del Perú, Lima, Peru., Salas Yupayccana CA; Pontificia Universidad Católica del Perú, Lima, Peru., Marca Zevallos MJ; Pontificia Universidad Católica del Perú, Lima, Peru.; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru., Cosio EG; Pontificia Universidad Católica del Perú, Lima, Peru., Junior BHM; Programa de Pós-Graduação da Rede de Biodiversidade e Biotecnologia da Amazônia Legal (BIONORTE), UFAM-UNEMAT, Nova Xavantina, Brazil.; Laboratório de Ecologia Vegetal, Universidade do Estado de Mato Grosso, Nova Xavantina, Brazil., Mendoza AM; Universidad Nacional de San Antonio Abad del Cusco, Cusco, Peru.; Jardín Botánico de Missouri, Cusco, Peru., Phillips O; School of Geography, University of Leeds, Leeds, UK., Salinas N; School of Geography and the Environment, Environmental Change Institute, University of Oxford, Oxford, UK.; Pontificia Universidad Católica del Perú, Lima, Peru., Vasquez R; Jardín Botánico de Missouri, Cusco, Peru., Mencuccini M; CREAF, Campus UAB, Cerdanyola del Vallés, Spain.; ICREA, Barcelona, Spain., Oliveira RS; Department of Plant Biology, Institute of Biology, University of Campinas, Campinas, Brazil.
Jazyk:	angličtina
Zdroj:	Tree physiology [Tree Physiol] 2023 Aug 16. Date of Electronic Publication: 2023 Aug 16.
DOI:	10.1093/treephys/tpad096
Abstrakt:	Lianas (woody vines) are important components of tropical forests and are known to compete with host trees for resources, decrease tree growth and increase tree mortality. Given the observed increases in liana abundance in some forests and their impacts on forest function, an integrated understanding of carbon dynamics of lianas and liana-infested host trees is critical for improved prediction of tropical forest responses to climate change. Non-structural carbohydrates (NSC) are the main substrate for plant metabolism (e.g., growth, respiration), and have been implicated in enabling tree survival under environmental stress, but little is known of how they vary among life-forms or of how liana infestation impacts host tree NSC. We quantified stem total NSC (NSC) concentrations and its fractions (starch and soluble sugars) in trees without liana infestation, trees with more than 50% of the canopy covered by lianas, and the lianas infesting those trees. We hypothesized that i) liana infestation depletes NSC storage in host trees by reducing carbon assimilation due to competition for resources; ii) trees and lianas, which greatly differ in functional traits related to water transport and carbon uptake, would also have large differences in NSC storage, and that As water availability has a significant role in NSC dynamics of Amazonian tree species, we tested these hypotheses within a moist site in western Amazonia and a drier forest site in southern Amazonia. We did not find any difference in NSC, starch or soluble sugar concentrations between infested and non-infested trees, in either site. This result suggests that negative liana impact on trees may be mediated through mechanisms other than depletion of host tree NSC concentrations. We found lianas have higher stem NSC and starch than trees in both sites. The consistent differences in starch concentrations, a long term NSC reserve, between life forms across sites reflect differences in carbon gain and use of lianas and trees. Soluble sugar concentrations were higher in lianas than in trees in the moist site but indistinguishable between life forms in the dry site. The lack of difference in soluble sugars between trees and lianas in the dry site emphasize the importance of this NSC fraction for plant metabolism of plants occurring in water limited environments. Abstract in Portuguese and Spanish are available in the supplementary material. (© The Author(s) 2023. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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