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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
15/01/2008 |
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Data da última atualização: |
25/07/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COELHO, G. C.; RACHWAL, M. F. G.; DEDECEK, R. A.; CURCIO, G. R.; NIETSCHE, K.; SCHENKEL, E. P. |
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Afiliação: |
GERALDO C. COLEHO, UNIVERSIDADE REGIONAL DO NOROESTE DO ESTADO DO RIO GRANDE DO SUL; MARCOS FERNANDO GLUCK RACHWAL, CNPF; RENATO ANTONIO DEDECEK, CNPF; GUSTAVO RIBAS CURCIO, CNPF; KLAUS NIETSCHE, EMPRESA DE ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL; ELOIR P. SCHENKEL, UNIVERSIDADE FEDERAL DE SANTA CATARINA. |
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Título: |
Effect of light intensity on methylxanthine contents of Ilex paraguariensis A. St. Hil. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Biochemical Systematics and Ecology, v. 35, n. 2, p. 75-80, fev. 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
Maté (Ilex paraguariensis A. St. Hil.) is a shade-tolerant species, frequently cultivated on agroforestry systems or even in monoculture. Secondary metabolism of mate´ includes the methylxanthines, caffeine and theobromine. Shading could alter the quantitative profile of these compounds in the plant, and since the secondary chemistry of maté is decisive to determine the quality of raw material, the caffeine and theobromine content under different light intensities were investigated. Artificial shading obtained by a nylon screen and natural shading produced by other trees were tested. Methylxanthines content was increased with the reduction of light, but only in the low light intensity treatment. A negative correlation was found between biomass accumulation and methylxanthines content. But the total methylxanthines yield per plant was not altered. |
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Palavras-Chave: |
Luz; Methylxanthine. |
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Thesagro: |
Ilex Paraguariensis. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01508naa a2200217 a 4500
001 1305068
005 2025-07-25
008 2007 bl uuuu u00u1 u #d
100 1 $aCOELHO, G. C.
245 $aEffect of light intensity on methylxanthine contents of Ilex paraguariensis A. St. Hil.$h[electronic resource]
260 $c2007
520 $aMaté (Ilex paraguariensis A. St. Hil.) is a shade-tolerant species, frequently cultivated on agroforestry systems or even in monoculture. Secondary metabolism of mate´ includes the methylxanthines, caffeine and theobromine. Shading could alter the quantitative profile of these compounds in the plant, and since the secondary chemistry of maté is decisive to determine the quality of raw material, the caffeine and theobromine content under different light intensities were investigated. Artificial shading obtained by a nylon screen and natural shading produced by other trees were tested. Methylxanthines content was increased with the reduction of light, but only in the low light intensity treatment. A negative correlation was found between biomass accumulation and methylxanthines content. But the total methylxanthines yield per plant was not altered.
650 $aIlex Paraguariensis
653 $aLuz
653 $aMethylxanthine
700 1 $aRACHWAL, M. F. G.
700 1 $aDEDECEK, R. A.
700 1 $aCURCIO, G. R.
700 1 $aNIETSCHE, K.
700 1 $aSCHENKEL, E. P.
773 $tBiochemical Systematics and Ecology$gv. 35, n. 2, p. 75-80, fev. 2007.
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Registro original: |
Embrapa Florestas (CNPF) |
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