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Registro Completo
Biblioteca(s): |
Embrapa Cocais. |
Data corrente: |
22/03/2012 |
Data da última atualização: |
16/08/2013 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
TOLEDO, M. M.; PAIVA, E. A. S.; LOVATO, M. B.; LEMOS FILHO, J. P. de. |
Afiliação: |
MARCOS MIRANDA TOLEDO, CPACP; ELDER ANTÔNIO SOUSA PAIVA, Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais.; MARIA BERNADETE LOVATO, Departamento de Biologia Geral, Instituto de Ciêcias Biológicas, Universidade Federal de Minas Gerais.; JOSÉ PIRES DE LEMOS FILHO, Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais. |
Título: |
Stem radial increment of forest and savanna ecotypes of a Neotropical tree: relationships with climate, phenology, and water potential. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Trees: structure and function, Springer Berlin, v.26, p.1137-1144, 2012. |
Páginas: |
8 p. |
DOI: |
10.1007/s00468-012-0690-y |
Idioma: |
Inglês |
Conteúdo: |
The aim of the present study was to investigate differences in stem radial increment between the savanna and forest ecotypes of Plathymenia reticulata at an ecotonal site. It was hypothesised that even under similar climate conditions, the savanna and forest ecotypes exhibit differences in radial growth, phenology, and water status because of differences in wood density. Stem radial increment, phenology, and water potential were evaluated monthly. The radial increment was positively related to precipitation and displayed no increment (or decrement) in months with low rainfall. A negative relationship was observed between radial growth and wood density, with the forest ecotype exhibiting a higher radial increment than the savanna ecotype. Midday water potential (MD) was also negatively related to wood density. Compared to the forest ecotype, the savanna ecotype displayed lower values of MD during the dry season and started leaf senescence earlier at the beginning of the dry season. Leaf fall improved water status, resulting in leaf flushing even without a significant increase in rainfall. Radial growth significantly increased only after the crown leaf cover was completed. The results confirmed the importance of wood density in the differential responses of ecotypes in relation to growth, water status, and phenology. |
Palavras-Chave: |
Atividade cambial; Floresta Atlântica; Incremento radial; Savana. |
Thesagro: |
Cerrado. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 02109naa a2200241 a 4500 001 1920000 005 2013-08-16 008 2012 bl uuuu u00u1 u #d 024 7 $a10.1007/s00468-012-0690-y$2DOI 100 1 $aTOLEDO, M. M. 245 $aStem radial increment of forest and savanna ecotypes of a Neotropical tree$brelationships with climate, phenology, and water potential.$h[electronic resource] 260 $c2012 300 $a8 p. 520 $aThe aim of the present study was to investigate differences in stem radial increment between the savanna and forest ecotypes of Plathymenia reticulata at an ecotonal site. It was hypothesised that even under similar climate conditions, the savanna and forest ecotypes exhibit differences in radial growth, phenology, and water status because of differences in wood density. Stem radial increment, phenology, and water potential were evaluated monthly. The radial increment was positively related to precipitation and displayed no increment (or decrement) in months with low rainfall. A negative relationship was observed between radial growth and wood density, with the forest ecotype exhibiting a higher radial increment than the savanna ecotype. Midday water potential (MD) was also negatively related to wood density. Compared to the forest ecotype, the savanna ecotype displayed lower values of MD during the dry season and started leaf senescence earlier at the beginning of the dry season. Leaf fall improved water status, resulting in leaf flushing even without a significant increase in rainfall. Radial growth significantly increased only after the crown leaf cover was completed. The results confirmed the importance of wood density in the differential responses of ecotypes in relation to growth, water status, and phenology. 650 $aCerrado 653 $aAtividade cambial 653 $aFloresta Atlântica 653 $aIncremento radial 653 $aSavana 700 1 $aPAIVA, E. A. S. 700 1 $aLOVATO, M. B. 700 1 $aLEMOS FILHO, J. P. de 773 $tTrees: structure and function, Springer Berlin$gv.26, p.1137-1144, 2012.
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