Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/15740
Title: Leaf-level photosynthetic capacity in lowland Amazonian and high-elevation Andean tropical moist forests of Peru
Authors: Bahar, Nur H.A.
Ishida, Francoise Yoko
Weerasinghe, Lasantha K.
Guerrieri, Rossella
O'Sullivan, Odhran S.
Bloomfield, Keith J.
Asner, Gregory P.
Martin, Roberta E.
Lloyd, Jon
Malhi, Yadvinder Singh
Phillips, Oliver L.
Meir, Patrick W.
Salinas, Norma
Cosio, Eric G.
null, Tomas
Quesada, Carlos Alberto
Sinca, Felipe
Escudero Vega, Alberto
Zuloaga Ccorimanya, Paola P.
Jhon, Del Aguila Pasquel,
Quispe Huaypar, Katherine
Cuba-Torres, Israel
Butrón Loayza, Rosalbina
Pelaez-Tapia, Yulina
Huamán-Ovalle, Judit
Long, Benedict M.
Evans, John R.
Atkin, Owen K.
Keywords: Abundance
Carbon Dioxide
Carboxylic Acid
Elevation
Enzyme Activity
Forest Ecosystem
Leaf Area
Moisture Content
Nitrogen
Phosphorus
Photosynthesis
Temperature Effect
Tropical Forest
Amazonas
Andes
Brasil
Peru
Carbon Dioxide
Nitrogen
Ribulose-bisphosphate Carboxylase
Altitude
Anatomy And Histology
Biological Model
Chemistry
Enzyme Assay
Forest
Humidity
Kinetics
Metabolism
Peru
Photosynthesis
Physiology
Plant Leaf
Species Difference
Temperature
Tropic Climate
Altitude
Carbon Dioxide
Enzyme Assays
Forests
Humidity
Kinetics
Models, Biological
Nitrogen
Peru
Photosynthesis
Plant Leaves
Ribulose-bisphosphate Carboxylase
Species Specificity
Temperature
Tropical Climate
Issue Date: 2017
metadata.dc.publisher.journal: New Phytologist
metadata.dc.relation.ispartof: Volume 214, Número 3, Pags. 1002-1018
Abstract: We examined whether variations in photosynthetic capacity are linked to variations in the environment and/or associated leaf traits for tropical moist forests (TMFs) in the Andes/western Amazon regions of Peru. We compared photosynthetic capacity (maximal rate of carboxylation of Rubisco (Vcmax), and the maximum rate of electron transport (Jmax)), leaf mass, nitrogen (N) and phosphorus (P) per unit leaf area (Ma, Na and Pa, respectively), and chlorophyll from 210 species at 18 field sites along a 3300-m elevation gradient. Western blots were used to quantify the abundance of the CO2-fixing enzyme Rubisco. Area- and N-based rates of photosynthetic capacity at 25°C were higher in upland than lowland TMFs, underpinned by greater investment of N in photosynthesis in high-elevation trees. Soil [P] and leaf Pa were key explanatory factors for models of area-based Vcmax and Jmax but did not account for variations in photosynthetic N-use efficiency. At any given Na and Pa, the fraction of N allocated to photosynthesis was higher in upland than lowland species. For a small subset of lowland TMF trees examined, a substantial fraction of Rubisco was inactive. These results highlight the importance of soil- and leaf-P in defining the photosynthetic capacity of TMFs, with variations in N allocation and Rubisco activation state further influencing photosynthetic rates and N-use efficiency of these critically important forests. © 2016 The Authors. New Phytologist © 2016 New Phytologist Trust
URI: https://repositorio.inpa.gov.br/handle/1/15740
metadata.dc.identifier.doi: 10.1111/nph.14079
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