Photosynthetica 2017, 55(4):679-688 | DOI: 10.1007/s11099-017-0703-6

Leaf trait plasticity in six forest tree species of central Amazonia

R. A. Marenco1,*, M. A. B. Camargo2, S. A. Antezana-Vera2, M. F. Oliveira2
1 Coordination of Environmental Dynamic, National Institute for Research in the Amazon (INPA), Manaus, Brazil
2 INPA's Botany Graduate Program, Manaus, Brazil

Tropical rainforest trees adjust leaf traits during ontogeny to cope with changes in the physical environment and maximize their carbon uptake. The aim of this study was to determine the plasticity index (PI) of leaf traits in understory and canopy leaves of six Amazonian tree species. In four of the six species the PI of leaf traits varied within species, and in four of the ten leaf traits assessed, the PI differed between species. The greatest PI values were found for stomatal density (Ds) and CO2-saturated photosynthesis, and the lowest ones were found for stomatal size, and leaf thickness. Despite the differences in PI values within species, the mean PI was similar in all the six species. As the saplings grow toward the canopy, the strategy to increase carbon uptake involves increasing Ds and leaf nitrogen and reducing stomatal size.

Keywords: gas exchange; Minquartia guianensis; Pouteria macrophylla; Protium apiculatum; Rinorea paniculata

Received: October 6, 2016; Accepted: February 10, 2017; Published: December 1, 2017Show citation

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Marenco, R.A., Camargo, M.A.B., Antezana-Vera, S.A., & Oliveira, M.F. (2017). Leaf trait plasticity in six forest tree species of central Amazonia. Photosynthetica, 55(4), 679-688. doi: 10.1007/s11099-017-0703-6.
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