Abstract
Studies with Curatella americana L wood are justified due to scarce information about this species. In this context, we collected wood samples from six trees (ages varied between 30-40 years old) planted in Selvíria (MS- Brazil). Our objective was to verify longitudinal variation of basic density and wood anatomy. From each sampled tree, 5 cm thick discs were removed, at three different heights: base of the trunk (≈ 15cm from the ground), DBH (diameter at breast height, 1m30cm from the ground), and top of the trunk (commercial height of tree with a minimum diameter of 5 cm). We use standardized methods for basic density and wood anatomy. According to results, we concluded that basic density, fiber length, fiber wall thickness, vessel element length, vessel diameter, and vessel frequency were influenced by different heights. However, in ray percentage, no significant variation was observed. The basic density correlates positively with length and fiber wall thickness, and negatively with vessel frequency.
Highlights
Curatella americana L. (Dilleniaceae), popularly known as "lixeira" or "sandpaper tree" is a native Brazilian species, but not endemic, naturally distributed in the North (Amazonas, Amapá, Pará, Rondônia, Roraima, Tocantins), Northeast (Alagoas, Bahia, Ceará, Maranhão, Paraíba, Pernambuco, Piauí, Rio Grande do Norte, Sergipe), Midwest (Distrito Federal, Goiás, Mato Grosso do Sul, Mato Grosso) and Southeast (Minas Gerais) in the Amazon Forest, Caatinga biomes, Cerrado, Atlantic Forest (Fraga, 2020).The species frequently occurs in Cerrado and is characterized by being a semi-deciduous, heliophite and selective xerophyte plant
We concluded that basic density, fiber length, fiber wall thickness, vessel element length, vessel diameter, and vessel frequency were influenced by different heights
The basic density, fiber length, fiber wall thickness and vessel diameter varied significantly between heights, but only the top position differed significantly from the base and DBH positions, and top position presented a lower value for all these characteristics (Table 3)
Summary
Curatella americana L. (Dilleniaceae), popularly known as "lixeira" or "sandpaper tree" is a native Brazilian species, but not endemic, naturally distributed in the North (Amazonas, Amapá, Pará, Rondônia, Roraima, Tocantins), Northeast (Alagoas, Bahia, Ceará, Maranhão, Paraíba, Pernambuco, Piauí, Rio Grande do Norte, Sergipe), Midwest (Distrito Federal, Goiás, Mato Grosso do Sul, Mato Grosso) and Southeast (Minas Gerais) in the Amazon Forest, Caatinga biomes, Cerrado, Atlantic Forest (Fraga, 2020).The species frequently occurs in Cerrado and is characterized by being a semi-deciduous, heliophite and selective xerophyte plant. (Dilleniaceae), popularly known as "lixeira" or "sandpaper tree" is a native Brazilian species, but not endemic, naturally distributed in the North (Amazonas, Amapá, Pará, Rondônia, Roraima, Tocantins), Northeast (Alagoas, Bahia, Ceará, Maranhão, Paraíba, Pernambuco, Piauí, Rio Grande do Norte, Sergipe), Midwest (Distrito Federal, Goiás, Mato Grosso do Sul, Mato Grosso) and Southeast (Minas Gerais) in the Amazon Forest, Caatinga biomes, Cerrado, Atlantic Forest (Fraga, 2020). According to Barbosa et al (2005) C. americana is one of the most abundant species in the open Cerrado areas of Roraima, in the northern end of the Brazilian Amazon. Over the years there are citations of wood use generally by local populations, e.g., Corrêa (1926) mentions that wood is used for internal works in houses, joinery and carpentry. Lorenzi (2002) mentions that wood is practically used in carpentry and joinery. According to Paula and Alves (2007), C. americana wood has a low density (0.50 g.cm-3) with thick fibers, making it difficult to work with, it is very durable under natural conditions, but little used
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