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タイトル: Extractives of Quercus crispula sapwood infected by the pathogenic fungi Raffaelea quercivora I: comparison of sapwood extractives from noninfected and infected samples
著者: Imai, Kayoko
Mitsunaga, Tohru
Takemoto, Hiroyuki
Yamada, Toshihiro
Ito, Shin-ichiro
Ohashi, Hideo
キーワード: Raffaelea quercivora
Quercus crispula
Gallotannins
Ellagitannins
Tannase
発行日: Apr-2009
出版者: Springer Nature
誌名: Journal of Wood Science
巻: 55
号: 2
開始ページ: 126
終了ページ: 132
抄録: The extracts of Quercus crispula infected by the ambrosia fungus, Raffaelea quercivora, were investigated. Phenol and tannin analyses indicated that normal sapwood (NS) contained a considerable amount of hydrolysable tannins, while infected colored sapwood (IS) contained less hydrolysable tannins and more phenols than NS. In treating pentagalloyl glucose (PGG), which is a model compound of hydrolysable tannins, with a culture medium of R. quercivora, PGG was rapidly hydrolyzed to produce gallic acid. The resulting gallic acid decreased in concentration over the subsequent cultivation period eventually disappeared. Measuring tannase and laccase activities of the culture medium of R. quercivora, tannase activity increased gradually from the beginning, while laccase activity increased rapidly at 5 days of incubation and disappeared at 8 days. An oxidative product from gallic acid treated with laccase was isolated by preparative high performance liquid chromatography, and was identified as purprogallincarboxylic acid (PGCA) by nuclear magnetic resonance spectroscopy and electron-impact mass spectrometry. PGCA was present in a 70% aqueous acetone extract of IS, and showed slight growth inhibition against R. quercivora.
記述: Part of this study was presented at the 57th Annual Meeting of the Japan Wood Research Society, Hiroshima, Japan, 2007.
著作権等: The article, Extractives of Quercus crispula sapwood infected by the pathogenic fungi Raffaelea quercivora I: comparison of sapwood extractives from noninfected and infected samples, written by Kayoko Imai, Tohru Mitsunaga, Hiroyuki Takemoto, Toshihiro Yamada, Shin-ichiro Ito, Hideo Ohashi, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on December 27, 2008 without open access. With the author(s)’ decision to opt for Open Choice the copyright of the article changed on April 27, 2018 to © The Author(s) 2018 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, duplication, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.
URI: http://hdl.handle.net/2433/236168
DOI(出版社版): 10.1007/s10086-008-1005-1
関連リンク: https://doi.org/10.1007/s10086-018-1722-z
出現コレクション:学術雑誌掲載論文等

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