Anatomia do lenho de Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) ocorrente em dois ambientes

Abstract

-(Wood anatomy of Enterolobium contortisiliquum (Vell.) Morong (Leguminosae-Mimosoideae) occurring in two environments). This study compares and characterizes the wood from stem of Enterolobium contortisiliquum in different environments. Samples from a total of twenty individuals were collected from plants occurring in a Caatinga area in the municipalities of Campina Grande, PB (7°11' S and 35°58' W), and Buíque-PE (8°35' S and 37°14' S) and in a Tropical Semidecidual Forest in the municipalities of Taquara-RS (29°44' S and 50°50' W), and Santa Maria-RS (29°47' S and 53°34' W). The areas present different climatic conditions, where Campina Grande and Buíque present the highest temperatures and lowest rainfall compared to Taquara and Santa Maria. A qualitative analysis was made through light microscopy (LM) and scanning electron microscopy (SEM). The data were submitted to descriptive statistical analysis and analysis of variance (P ≥ 0,05). In general, regardless of the origin the individuals examined, the wood of E. contortisiliquum presented solitary and multiple vessels, intervascular pits and alternate polygonal radiovascular alterns with shapes, vestured pits, presence of vasicentric paratraqueal parenchyma, homogeneous rays, predominantly 3 to 4 cell wide. Gelatinous fibres were observed. All individuals analyzed presented growth layers. A greater quantity of crystals and starch grains was detected in cells of the axial parenchyma of plants from the lower latitudes localities. The parametric analysis of variance confirm the associations between environment and wood anatomic characteristics of E. contortisiliquum, but show differences when data are compared to reports from other species and registered in the literature.

Wood and Leaf Anatomy of Copaifera langsdorffii Dwarf Trees

“…Starch, as a source of sugars, would be important in view of limited photosynthesis in these trees by the low water availability in the soil. Similar results were noted in other Brazilian species by Luchi (2004) who also found wider rays in drier environments in Croton urucurana and Lima et al (2009) in Enterolobium contortisiliquum. Expanded rays in cacti stored water in wood tissues (Stone-Palmquist & Mauseth 2002).…”

Anatomia comparada do lenho de Piptadenia gonoacantha (Mart.) J.F.Macbr. em dois tipos de vegetação

“…Em P. gonoacantha observou-se raios significativamente mais baixos, largos e mais frequentes nas amostras do PEC, local com maior altitude e latitude, menor precipitação e menor temperatura média em relação às amostras da EEC. Lima et al (2009) Quando se analisa os dados geográficos dos locais de estudo, verifica-se que o PEC apresenta maior altitude e latitude; nas amostras coletadas nesse local há variações significativas, com maior frequência de vasos e fibras de maior diâmetro.…”

<b>Shading effects on leaf life span and functional traits in the widespread species <i>Enterolobium contortisiliquum<i> (Vell.) Morong

“…Morong occurs in natural forest formations, mainly in the Atlantic Forest (Lima, Oliveira, & Rodrigues, 2009). This species also occurs in the Cerrado domain and Caatinga vegetation in northeast Brazil.…”