Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Theoretical and Experimental Plant Physiology |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000200002 |
Resumo: | Physiological differences in the Cordia oncocalyx tree growing at different densities in two distinct areas were investigated. An agrosilvopastoral system (AGP) and a secondary forest (SF) were studied. Under both types of land-use, C. oncocalyx presented a relative frequency of approximately 50%, and absolute densities of 670 and 80 individuals per hectare, respectively. Net photosynthesis (A), stomatal conductance (g s), and transpiration (E) were measured, and the SPAD index was recorded in sun leaves from the canopy and shade leaves from the lower canopy, in both the wet and dry seasons. We quantified the dry biomass of leaves and fruit on a per-tree basis at the end of the wet season. Net photosynthesis was higher in shaded leaves in the AGP in the wet season, reaching an average of 4.8 μmol m-2 s-1 against 3.2 μmol m-2 s-1 under SF. As trees began to shed their leaves at the beginning of the dry season and more radiation reached the shaded leaves, there was an increase in SF for A, depending on the intensity of light reaching the leaves. In the sun leaves, gas exchange was similar for the land-use systems during the wet season, but stronger in AGP than under SF during the dry season. This happened when the leaves in AGP retained more relative water content during a period of low gravimetric levels of the soil water. The lower tree density in AGP promoted a higher SPAD index and dry biomass in both the sun and shaded leaves, and allowed greater A, E and g s rates in the sun leaves at the beginning of the dry period. |
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Theoretical and Experimental Plant Physiology |
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Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazilagroforestry systemchlorophyllCordia oncocalyxdry biomassleaf gas exchangesecondary forestPhysiological differences in the Cordia oncocalyx tree growing at different densities in two distinct areas were investigated. An agrosilvopastoral system (AGP) and a secondary forest (SF) were studied. Under both types of land-use, C. oncocalyx presented a relative frequency of approximately 50%, and absolute densities of 670 and 80 individuals per hectare, respectively. Net photosynthesis (A), stomatal conductance (g s), and transpiration (E) were measured, and the SPAD index was recorded in sun leaves from the canopy and shade leaves from the lower canopy, in both the wet and dry seasons. We quantified the dry biomass of leaves and fruit on a per-tree basis at the end of the wet season. Net photosynthesis was higher in shaded leaves in the AGP in the wet season, reaching an average of 4.8 μmol m-2 s-1 against 3.2 μmol m-2 s-1 under SF. As trees began to shed their leaves at the beginning of the dry season and more radiation reached the shaded leaves, there was an increase in SF for A, depending on the intensity of light reaching the leaves. In the sun leaves, gas exchange was similar for the land-use systems during the wet season, but stronger in AGP than under SF during the dry season. This happened when the leaves in AGP retained more relative water content during a period of low gravimetric levels of the soil water. The lower tree density in AGP promoted a higher SPAD index and dry biomass in both the sun and shaded leaves, and allowed greater A, E and g s rates in the sun leaves at the beginning of the dry period.Sociedade Brasileira de Fisiologia Vegetal2013-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000200002Theoretical and Experimental Plant Physiology v.25 n.2 2013reponame:Theoretical and Experimental Plant Physiologyinstname:Sociedade Brasileira de Fisiologia Vegetal (SBFV)instacron:SBFV10.1590/S2197-00252013000200002info:eu-repo/semantics/openAccessMendes,Marlete Moreira de SousaLacerda,Claudivan Feitosa deFernandes,Francisco Éden PaivaCavalcante,Ana Clara RodriguesOliveira,Teógenes Senna deeng2013-10-15T00:00:00Zoai:scielo:S2197-00252013000200002Revistahttps://www.springer.com/journal/40626ONGhttps://old.scielo.br/oai/scielo-oai.php||bjpp.sbfv@gmail.com2197-00252197-0025opendoar:2013-10-15T00:00Theoretical and Experimental Plant Physiology - Sociedade Brasileira de Fisiologia Vegetal (SBFV)false |
dc.title.none.fl_str_mv |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
title |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
spellingShingle |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil Mendes,Marlete Moreira de Sousa agroforestry system chlorophyll Cordia oncocalyx dry biomass leaf gas exchange secondary forest |
title_short |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
title_full |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
title_fullStr |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
title_full_unstemmed |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
title_sort |
Ecophysiology of deciduous plants grown at different densities in the semiarid region of Brazil |
author |
Mendes,Marlete Moreira de Sousa |
author_facet |
Mendes,Marlete Moreira de Sousa Lacerda,Claudivan Feitosa de Fernandes,Francisco Éden Paiva Cavalcante,Ana Clara Rodrigues Oliveira,Teógenes Senna de |
author_role |
author |
author2 |
Lacerda,Claudivan Feitosa de Fernandes,Francisco Éden Paiva Cavalcante,Ana Clara Rodrigues Oliveira,Teógenes Senna de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Mendes,Marlete Moreira de Sousa Lacerda,Claudivan Feitosa de Fernandes,Francisco Éden Paiva Cavalcante,Ana Clara Rodrigues Oliveira,Teógenes Senna de |
dc.subject.por.fl_str_mv |
agroforestry system chlorophyll Cordia oncocalyx dry biomass leaf gas exchange secondary forest |
topic |
agroforestry system chlorophyll Cordia oncocalyx dry biomass leaf gas exchange secondary forest |
description |
Physiological differences in the Cordia oncocalyx tree growing at different densities in two distinct areas were investigated. An agrosilvopastoral system (AGP) and a secondary forest (SF) were studied. Under both types of land-use, C. oncocalyx presented a relative frequency of approximately 50%, and absolute densities of 670 and 80 individuals per hectare, respectively. Net photosynthesis (A), stomatal conductance (g s), and transpiration (E) were measured, and the SPAD index was recorded in sun leaves from the canopy and shade leaves from the lower canopy, in both the wet and dry seasons. We quantified the dry biomass of leaves and fruit on a per-tree basis at the end of the wet season. Net photosynthesis was higher in shaded leaves in the AGP in the wet season, reaching an average of 4.8 μmol m-2 s-1 against 3.2 μmol m-2 s-1 under SF. As trees began to shed their leaves at the beginning of the dry season and more radiation reached the shaded leaves, there was an increase in SF for A, depending on the intensity of light reaching the leaves. In the sun leaves, gas exchange was similar for the land-use systems during the wet season, but stronger in AGP than under SF during the dry season. This happened when the leaves in AGP retained more relative water content during a period of low gravimetric levels of the soil water. The lower tree density in AGP promoted a higher SPAD index and dry biomass in both the sun and shaded leaves, and allowed greater A, E and g s rates in the sun leaves at the beginning of the dry period. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000200002 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2197-00252013000200002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S2197-00252013000200002 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Fisiologia Vegetal |
publisher.none.fl_str_mv |
Sociedade Brasileira de Fisiologia Vegetal |
dc.source.none.fl_str_mv |
Theoretical and Experimental Plant Physiology v.25 n.2 2013 reponame:Theoretical and Experimental Plant Physiology instname:Sociedade Brasileira de Fisiologia Vegetal (SBFV) instacron:SBFV |
instname_str |
Sociedade Brasileira de Fisiologia Vegetal (SBFV) |
instacron_str |
SBFV |
institution |
SBFV |
reponame_str |
Theoretical and Experimental Plant Physiology |
collection |
Theoretical and Experimental Plant Physiology |
repository.name.fl_str_mv |
Theoretical and Experimental Plant Physiology - Sociedade Brasileira de Fisiologia Vegetal (SBFV) |
repository.mail.fl_str_mv |
||bjpp.sbfv@gmail.com |
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1754824595234357248 |