Artigo

Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia

Crabwood (Carapa guianensis Aubl.) is a fast growing tree species with many uses among Amazonian local communities. The main objective of this study was to assess the effect of seasonal rainfall pattern on growth rates, and seasonal and diurnal changes in leaf gas exchange and leaf water potential (...

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Autor principal: Camargo, Miguel Angelo Branco
Outros Autores: Marenco, R. A.
Grau: Artigo
Idioma: pt_BR
Publicado em: Revista Árvore 2020
Assuntos:
Carapa Guianensis
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/15176
id oai:repositorio:1-15176
recordtype dspace
spelling oai:repositorio:1-15176 Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia Crescimento, características foliares e estomáticas de andiroba (Carapa guianensis Aubl.) na Amazônia central Camargo, Miguel Angelo Branco Marenco, R. A. Carapa Guianensis Crabwood (Carapa guianensis Aubl.) is a fast growing tree species with many uses among Amazonian local communities. The main objective of this study was to assess the effect of seasonal rainfall pattern on growth rates, and seasonal and diurnal changes in leaf gas exchange and leaf water potential (Ψ L) in crabwood. To assess the effect of rainfall seasonality on growth and physiological leaf traits an experiment was conducted in Manaus, AM (03° 05' 30'' S, 59° 59' 35'' S). In this experiment, six 6-m tall plants were used to assess photosynthetic traits and Ψ L. In a second experiment the effect of growth irradiance on stomatal density (S D), size (S S) and leaf thickness was assessed in 0.8-m tall saplings. Stomatal conductance (g s) and light-saturated photosynthesis (A max) were higher in the wet season, and between 09:00 and 15:00 h. However, no effect of rainfall seasonality was found on Ψ L and potential photosynthesis (CO 2-saturated). Ψ L declined from -0.3 MPa early in the morning to -0.75 MPa after midday. It increased in the afternoon but did not reach full recovery at sunset. Growth rates of crabwood were high, and similar in both seasons (2 mm month -1). Leaf thickness and S D were 19% and 47% higher in sun than in shade plants, whereas the opposite was true for S S. We conclude that Ψ L greatly affects carbon assimilation of crabwood by reducing g s at noon, although this effect is not reflected on growth rates indicating that other factors offset the effect of g s on A max. 2020-05-07T14:09:19Z 2020-05-07T14:09:19Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/15176 10.1590/S0100-67622012000100002 pt_BR Volume 36, Número 1, Pags. 7-16 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Revista Árvore
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language pt_BR
topic Carapa Guianensis
spellingShingle Carapa Guianensis
Camargo, Miguel Angelo Branco
Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
topic_facet Carapa Guianensis
description Crabwood (Carapa guianensis Aubl.) is a fast growing tree species with many uses among Amazonian local communities. The main objective of this study was to assess the effect of seasonal rainfall pattern on growth rates, and seasonal and diurnal changes in leaf gas exchange and leaf water potential (Ψ L) in crabwood. To assess the effect of rainfall seasonality on growth and physiological leaf traits an experiment was conducted in Manaus, AM (03° 05' 30'' S, 59° 59' 35'' S). In this experiment, six 6-m tall plants were used to assess photosynthetic traits and Ψ L. In a second experiment the effect of growth irradiance on stomatal density (S D), size (S S) and leaf thickness was assessed in 0.8-m tall saplings. Stomatal conductance (g s) and light-saturated photosynthesis (A max) were higher in the wet season, and between 09:00 and 15:00 h. However, no effect of rainfall seasonality was found on Ψ L and potential photosynthesis (CO 2-saturated). Ψ L declined from -0.3 MPa early in the morning to -0.75 MPa after midday. It increased in the afternoon but did not reach full recovery at sunset. Growth rates of crabwood were high, and similar in both seasons (2 mm month -1). Leaf thickness and S D were 19% and 47% higher in sun than in shade plants, whereas the opposite was true for S S. We conclude that Ψ L greatly affects carbon assimilation of crabwood by reducing g s at noon, although this effect is not reflected on growth rates indicating that other factors offset the effect of g s on A max.
format Artigo
author Camargo, Miguel Angelo Branco
author2 Marenco, R. A.
author2Str Marenco, R. A.
title Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
title_short Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
title_full Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
title_fullStr Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
title_full_unstemmed Growth, leaf and stomatal traits of crabwood (Carapa guianensis Aubl.) in central Amazonia
title_sort growth, leaf and stomatal traits of crabwood (carapa guianensis aubl.) in central amazonia
publisher Revista Árvore
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/15176
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score 11.755432

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