Caracterização do lenho e variação radial de Pittosporum undulatum Vent. (pau-incenso)

Longui, Eduardo Luiz; Romeiro, Diego; Silva, Morgana Tramontini da; Ribeiro, Ariane; Gouveia, Tatiana Cestini; Lima, Israel Luiz de; Monteiro, S. P.; Florsheim, Borges

doi:10.1590/s2236-89062011000100004

Cited by 5 publications

(5 citation statements)

References 31 publications

(21 reference statements)

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“…Entretanto, Honjo et al (2005), em estudo com Acacia mangium, não detectaram variação radial significativa para essa estrutura. Longui et al (2011) observaram oscilação dos valores do comprimento dos vasos no sentido medula-câmbio para Pittosporum undulatum. Segundo Urbinati et al (2003), os diferentes estudos realizados com elementos de vasos revelam que cada espécie, em função das suas características genéticas e das condições ambientais nas quais se desenvolve, apresenta padrões anatômicos diferentes, podendo ou não apresentar nitidamente os lenhos juvenil e adulto.…”

Section: Resultsunclassified

“…Essa tendência de variação foi também descrita por Tomazello Filho (1985Filho ( , 1987, em estudos realizados com espécies de Eucalyptus sp. ; Florsheim et al (2009), para Eucalyptus dunnii; Fan et al (2009), para quatro espécies de Fagaceaes, e Longui et al (2009Longui et al ( , 2010Longui et al ( , 2011, analisando a variação radial do lenho de Luehea divaricata, Piptadenia gonoacantha e Pittosporum undulatum, respectivamente. Para Fan et al (2009), a variação crescente do diâmetro dos elementos de vasos no sentido medula-câmbio reflete o processo de maturação do câmbio vascular.…”

Section: Resultsunclassified

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Variação anatômica no lenho de Astronium lecointei Ducke

Melo¹,

Silva²,

Urbinati³

et al. 2013

Floram

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RESUMOCom o objetivo de avaliar a variação dos elementos celulares de Astronium lecointei Ducke no sentido medula-câmbio, analisaram-se amostras de madeira de três regiões radiais da árvore, a 1,30 m do solo: 0% (próximo à medula), 50% (região intermediária) e 100% (próximo ao câmbio vascular). A metodologia aplicada no trabalho foi aquela tradicionalmente recomendada para estudos em anatomia de madeira, seguindo orientação do IAWA Committee. Observou-se que alguns elementos anatômicos apresentaram tendências de variação definidas e estatisticamente significativas: frequência, diâmetro e comprimento dos elementos de vaso, altura dos raios em micrômetros e comprimento das fibras. Observou-se também maior obstrução dos poros por tilas próximo à medula e na região intermediária. A tendência de estabilização das dimensões dessas estruturas pode estar indicando a formação de madeira adulta a partir da região intermediária analisada no lenho da espécie. Palavras-chave:Astronium lecointei, elementos celulares da madeira, variação radial. ABSTRACTIn order to evaluate the variation of the cellular elements of Astronium lecointei Ducke from the pith towards the vascular cambium, wood samples from three regions of the radial sense in the tree at 1.30 m above the groundwere analyzed: 0% (near to the pith), 50% (intermediate region) and 100% (near to the vascular cambium). The methodology applied in the work was the one traditionally recommended for studies in wood anatomy, following the guidance of the IAWA Committee. It was possible to observe that some anatomical elements showed well-defined, statistically significant variation trends: frequency, diameter and length of the vessel elements, length of rays in microns, and fiber length. There was also greater pore blockage by tyloses close to the pith and in the intermediate region. The tendency to stabilize the values of these structures may indicate the formation of adult wood as from the intermediate region analyzed in the wood of Astronium lecointei Ducke.

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Section: Resultsunclassified

Variação anatômica no lenho de Astronium lecointei Ducke

Melo¹,

Silva²,

Urbinati³

et al. 2013

Floram

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“…E. pubescens). The most common model reported in the literature (LIMA et al, 2011;LOBÃO et al, 2012) indicates an increase in the wood density with the trees' age due to modifications in the cambium vascular forming the adult wood.…”

Section: Speciementioning

confidence: 99%

Brazilian cerrado species: wood characteristics

Faria¹,

Neto²,

Lima³

et al. 2020

Biosci. J.

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The characterization of wood anatomy and proprieties can provide subsidies for rational use of tree species. Enables, oftentimes, the definition of technological potential of wood - and wood products - through the assessment of quality information and also allows it´s correct identification, contributing to the timber production chain. The objective of this study was to contribute to the knowledge about wood properties of the Cerrado biome (Brazilian savanna) species trough the anatomical characterization and determination of density profile. Twenty trees species belonging to thirteen families occurring in Pirenópolis, Goiás and Brasília, Federal District, Brazil, was selected and radial samples were removed from the tree trunks at the DBH (1.30 m) in a non-destructive way using an incremental probe and a motorized extractor. The qualitative and quantitative anatomical parameters of vessels and fibers and the wood density were determined in the collected samples. Species presented fibers with mean values between 900.5 and 2052.9 µm for the length; 18.1 and 27.7 µm for the diameter; and 4.4 to 9.4 µm for the wall thickness. The species presented a variation in the vessel dimensions from 29.2 to 155.6 µm for the diameter; 17.7 to 32.5% for occupied area; and 2.6 to 165 to vessels.mm-2. The apparent density presented mean values between 0.36 and 1.21 g cm-3. The specie that presented the highest variation of wood density was A. fraxinifolium. According to the radial profiles two patterns of increasing and stable variation in the apparent density of the pith to bark were defined as a function of the wood anatomical characteristics.

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“…Ecological analysis of the wood provided evidences that Pittosporum undulatun has a greater investment in xylem safety than in water transport efficiency. The values of the ecological indices observed are related to plants adapted to conditions of lower water availability (LONGUI et al, 2011).…”

Section: Ecological Aspectsmentioning

confidence: 97%

Pittosporum undulatum Vent.: subsidies to the control and management

Negrelle

Mielke

Cuquel

et al. 2018

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Pittosporum undulatum (Australian cheesewood) is considered an ornamental species with high invasive potential, due to its strong adaptation capacity to colonize different habitats. Aiming to support controlling management actions, a review of its botanical, ecological, ethnobotanical and silvicultural aspects are presented. Control programs should include this type of information to ensure that the limited resources devoted to this issue will be efficiently allocated. It is important to address holistically the causes of the invasion, particularly the role of the original structure and functional changes imposed on ecosystems and their processes, since colonization by invasive species.

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Caracterização do lenho e variação radial de Pittosporum undulatum Vent. (pau-incenso)

Cited by 5 publications

References 31 publications

Variação anatômica no lenho de Astronium lecointei Ducke

Variação anatômica no lenho de Astronium lecointei Ducke

Brazilian cerrado species: wood characteristics

Pittosporum undulatum Vent.: subsidies to the control and management

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