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Title: Accelerated laboratory test of three Amazonian wood species called Tauari, exposed to white- and brown-rot fungi and color response according to CIE L* a* b* system
Other Titles: Ensaio acelerado de laboratório de três espécies de madeiras da Amazônia chamadas de Tauari, expostas aos fungos de podridão-branca e parda e resposta colorimétrica de acordo com o sistema CIE L* a* b*
Authors: Okino, Esmeralda Yoshico Arakaki
Pastore, Tereza Cristina Monteiro
Camargos, José Arlete Alves
Coradin, Vera Terezinha Rauber
Teixeira, Divino Eterno
Santana, Marcos Antonio Eduardo
Fagg, Christopher William
Assunto:: Madeira - conservação
Madeira - Amazônia
Colorimetria
Issue Date: Jul-2015
Publisher: Universidade Federal de Santa Maria
Citation: OKINO, Esmeralda Yoshico Arakaki et al. Accelerated laboratory test of three Amazonian wood species called Tauari, exposed to white- and brown-rot fungi and color response according to CIE L* a* b* system. Ciência Florestal, Santa Maria, v. 25, n. 3, p. 581-593, jul./set. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982015000300581&lng=en&nrm=iso>. Acesso em: 22 mar. 2018. doi: http://dx.doi.org/10.5902/1980509819609.
Abstract: Os objetivos deste estudo foram: avaliar a durabilidade natural de três espécies de tauari (Couratari guianensis Aublet, Couratari oblongifolia Ducke & Knuth R. e Couratari stellata A.C.Smith), relatar os parâmetros colorimétricos de acordo com o sistema CIE L * a * b * 1976 assim como mostrar a aparência dos blocos de madeira antes e após o ataque. Dois fungos de podridão-parda [Gloeophyllum trabeum (Persoon ex Fries) Murril. e Lentinus lepideus Fr.] e dois de podridão-branca [Trametes versicolor (Linnaeus ex Fries) Pilat e Ganoderma applanatum (Pers. ex Wallr.)] foram utilizados. A madeira de tauari foi classificada como "moderadamente resistente" a "resistente" quando exposta aos fungos Gloeophyllum trabeum, Trametes versicolor e Ganoderma applanatum. O conteúdo de extrativos das amostras atacadas diminuiu quando comparado com o controle, exceto Couratari stellata expostos a Ganoderma applanatum. Por outro lado, os conteúdos de cinzas aumentaram quando comparados com o controle, exceto para a madeira de Couratari stellata exposto ao Gloeophyllum trabeum. Todos os blocos de madeira atacados e as serragens tornaram-se mais escuras, exceto para a serragem de Couratari stellata exposto ao fungoTrametes versicolor, e mais vermelho do que a amostra sem ataque. O ΔE * médio do bloco de madeira e serragem, atacados, atingiram 29,5 e 14,3, respectivamente.
Abstract: The purposes of this study were to: evaluate de natural durability of three species of tauari (Couratari guianensis Aublet, Couratari oblongifolia Ducke & R.Knuth and Couratari stellata A.C.Smith), report the colorimetric parameters according to CIE L*a*b* 1976 system and also show the appearance of control and attacked wood blocks. Two brown-rot [Gloeophyllum trabeum (Persoon ex Fries) Murril. and Lentinus lepideus Fr.] and two white-rot [Trametes versicolor (Linnaeus ex Fries) Pilat and Ganoderma applanatum (Pers. ex Wallr.)] fungi were used.Tauari wood was classed as "moderately resistant" to "resistant" when exposed toGloeophyllum trabeum, Trametes versicolor andGanoderma applanatum fungi. All extractives' contents of attacked samples decreased when compared with the control (sound wood), exceptCouratari stellata exposed to Ganoderma applanatum.Conversely, all ash contents increased when compared with the control, except Couratari stellata exposed to Gloeophyllum trabeum. All attacked wood blocks and wood meal samples were darker, except wood meal from Couratari stellata exposed toTrametes versicolor, and redder than the control. The∆E* mean value in attacked wood blocks and wood meal samples attained 29.5 and 14.3, respectively.
Licença:: Ciência Florestal - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY NC 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982015000300581&lng=en&nrm=iso. Acesso em: 22 mar. 2018.
DOI: http://dx.doi.org/10.5902/1980509819609
Appears in Collections:EFL - Artigos publicados em periódicos

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