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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
20/06/2007 |
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Data da última atualização: |
04/12/2024 |
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Autoria: |
HILLIS, W. E.; INOUE, T. |
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Título: |
The formation of polyphenols in trees - IV: The polyphenols formed in Pinus radiata after Sirex attack. |
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Ano de publicação: |
1968 |
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Fonte/Imprenta: |
Phytochemistry, v.7, n. 1, p. 13-22, 1968. |
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Idioma: |
Inglês |
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Conteúdo: |
The composition of the polyphenolic extractives of unattacked, damaged and Sirex-affected sapwood, heartwood and knotwood of Pinus radiata D. Don differ considerably. The sapwood contained vanillin, vanillic, protocatechuic, 4-hydroxybenzoic, salicylic and ferulic acids, hydroquinone, traces of pinosylvin monomethyl ether and unidentified compounds. The amounts of pinobanksin, pinocembrin, pinosylvin and its monomethyl ether are much greater in the knotwood than in the heartwood. Whereas only very small amounts of pinosylvin were found in heartwood, the amount in knotwood was larger than that of its ether. No flavonoids were found in Sirex-affected wood but the amount of pinosylvin was much larger than its ether. Damaged sapwood contained pinosylvin monomethyl ether and pinocembrin. A compound with the properties of a flavanonolC-glycosidewas isolated from the heartwood and knotwood. It is concluded that wood extractives are formed in situ and that the conditions initiating their formation influence their composition. The restriction of the spread of the symbiotic fungus of Sirex in trees which resisted attack, appears to be due to the formation of stilbenes in the sapwood after infection |
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Thesagro: |
Pinus Radiata. |
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Thesaurus Nal: |
Sirex. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01677naa a2200157 a 4500
001 1279367
005 2024-12-04
008 1968 bl uuuu u00u1 u #d
100 1 $aHILLIS, W. E.
245 $aThe formation of polyphenols in trees - IV$bThe polyphenols formed in Pinus radiata after Sirex attack.$h[electronic resource]
260 $c1968
520 $aThe composition of the polyphenolic extractives of unattacked, damaged and Sirex-affected sapwood, heartwood and knotwood of Pinus radiata D. Don differ considerably. The sapwood contained vanillin, vanillic, protocatechuic, 4-hydroxybenzoic, salicylic and ferulic acids, hydroquinone, traces of pinosylvin monomethyl ether and unidentified compounds. The amounts of pinobanksin, pinocembrin, pinosylvin and its monomethyl ether are much greater in the knotwood than in the heartwood. Whereas only very small amounts of pinosylvin were found in heartwood, the amount in knotwood was larger than that of its ether. No flavonoids were found in Sirex-affected wood but the amount of pinosylvin was much larger than its ether. Damaged sapwood contained pinosylvin monomethyl ether and pinocembrin. A compound with the properties of a flavanonolC-glycosidewas isolated from the heartwood and knotwood. It is concluded that wood extractives are formed in situ and that the conditions initiating their formation influence their composition. The restriction of the spread of the symbiotic fungus of Sirex in trees which resisted attack, appears to be due to the formation of stilbenes in the sapwood after infection
650 $aSirex
650 $aPinus Radiata
700 1 $aINOUE, T.
773 $tPhytochemistry$gv.7, n. 1, p. 13-22, 1968.
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