Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia

Marenco, R. A.; Vieira, Gil

Artigo

Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia

The effect of the microsite light environment (MLE) on specific leaf area (SLA), light-saturated photosynthesis (Amax), maximum transpiration (Emax) and stomatal conductance (gs-max) was examined in three tree forest species (late successional Minquartia guianensis and Scleronema micranthum, and Gou...

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Autor principal:	Marenco, R. A.
Outros Autores:	Vieira, Gil
Grau:	Artigo
Idioma:	English
Publicado em:	Journal of Tropical Forest Science 2020
Assuntos:	Photosynthesis Transpiration Diffuse Light Leaf Respiration Minquartia Guianensis Stomatal Conductance Forestry Foliar Analysis Goupia Minquartia Selective Cutting Goupia Goupia Glabra Minquartia Minquartia Guianensis Scleronema Scleronema Micranthum
Acesso em linha:	https://repositorio.inpa.gov.br/handle/1/18848

id	oai:repositorio:1-18848
recordtype	dspace
spelling	oai:repositorio:1-18848 Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia Marenco, R. A. Vieira, Gil Photosynthesis Transpiration Diffuse Light Leaf Respiration Minquartia Guianensis Stomatal Conductance Forestry Foliar Analysis Goupia Minquartia Selective Cutting Goupia Goupia Glabra Minquartia Minquartia Guianensis Scleronema Scleronema Micranthum The effect of the microsite light environment (MLE) on specific leaf area (SLA), light-saturated photosynthesis (Amax), maximum transpiration (Emax) and stomatal conductance (gs-max) was examined in three tree forest species (late successional Minquartia guianensis and Scleronema micranthum, and Goupia glabra, a pioneer species) growing in the forest understorey. Logging of large trees 15 years ago had no significant effect on either SLA or photosynthetic parameters. On a per area basis, species did not differ in gas exchange parameters. However, when photosynthesis was expressed on a per mass basis (μg C g-1 DM s-1), higher photosynthetic rates were observed in Goupia (1.07) than in Scleronema (0.71) or Minquartia (0.57). SLA (m2 kg-1) was greater in Goupia (24.4) than in Scleronema (18) or Minquartia (15.9). Amax, Emax and gs-max increased as the MLE in the understorey became brighter, particularly in Goupia. Leaf respiration in the light (0.2 μmol m-2 s-1) and the apparent quantum yield (33 mmol CO2 mol-1 photon) were similar in all examined species. Regardless of logging disturbance, examined species acclimated to the MLE according to their successional status. Goupia, but not Minquartia or Scleronema, responded to its light environment mainly by changing SLA, indicating that physiological processes are involved in the acclimation of late successional species to the forest understorey. 2020-06-15T22:03:25Z 2020-06-15T22:03:25Z 2005 Artigo https://repositorio.inpa.gov.br/handle/1/18848 en Volume 17, Número 2, Pags. 265-278 Restrito Journal of Tropical Forest Science
institution	Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection	INPA-RI
language	English
topic	Photosynthesis Transpiration Diffuse Light Leaf Respiration Minquartia Guianensis Stomatal Conductance Forestry Foliar Analysis Goupia Minquartia Selective Cutting Goupia Goupia Glabra Minquartia Minquartia Guianensis Scleronema Scleronema Micranthum
spellingShingle	Photosynthesis Transpiration Diffuse Light Leaf Respiration Minquartia Guianensis Stomatal Conductance Forestry Foliar Analysis Goupia Minquartia Selective Cutting Goupia Goupia Glabra Minquartia Minquartia Guianensis Scleronema Scleronema Micranthum Marenco, R. A. Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
topic_facet	Photosynthesis Transpiration Diffuse Light Leaf Respiration Minquartia Guianensis Stomatal Conductance Forestry Foliar Analysis Goupia Minquartia Selective Cutting Goupia Goupia Glabra Minquartia Minquartia Guianensis Scleronema Scleronema Micranthum
description	The effect of the microsite light environment (MLE) on specific leaf area (SLA), light-saturated photosynthesis (Amax), maximum transpiration (Emax) and stomatal conductance (gs-max) was examined in three tree forest species (late successional Minquartia guianensis and Scleronema micranthum, and Goupia glabra, a pioneer species) growing in the forest understorey. Logging of large trees 15 years ago had no significant effect on either SLA or photosynthetic parameters. On a per area basis, species did not differ in gas exchange parameters. However, when photosynthesis was expressed on a per mass basis (μg C g-1 DM s-1), higher photosynthetic rates were observed in Goupia (1.07) than in Scleronema (0.71) or Minquartia (0.57). SLA (m2 kg-1) was greater in Goupia (24.4) than in Scleronema (18) or Minquartia (15.9). Amax, Emax and gs-max increased as the MLE in the understorey became brighter, particularly in Goupia. Leaf respiration in the light (0.2 μmol m-2 s-1) and the apparent quantum yield (33 mmol CO2 mol-1 photon) were similar in all examined species. Regardless of logging disturbance, examined species acclimated to the MLE according to their successional status. Goupia, but not Minquartia or Scleronema, responded to its light environment mainly by changing SLA, indicating that physiological processes are involved in the acclimation of late successional species to the forest understorey.
format	Artigo
author	Marenco, R. A.
author2	Vieira, Gil
author2Str	Vieira, Gil
title	Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
title_short	Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
title_full	Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
title_fullStr	Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
title_full_unstemmed	Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
title_sort	specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia
publisher	Journal of Tropical Forest Science
publishDate	2020
url	https://repositorio.inpa.gov.br/handle/1/18848
_version_	1787141938522095616
score	11.755432

Specific leaf area and photosynthetic parameters of tree species in the forest understorey as a function of the microsite light environment in central amazonia

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