NDLI: Differences in chemical constituents between vascular bundles and nonvascular bundles of cacao (Theobroma cacao L.) hull

Content Provider	Springer Nature Link
Author	Chung, B. Y. Iiyama, K.
Copyright Year	2003
Abstract	Cacao (Theobroma cacao L.) hulls were physically separated into vascular bundles (VBs) and nonvascular bundles (NVBs) to investigate their chemical compositions and the structural features of abundant polyphenolic compounds. Glucose content was determined to be 21.4% for VBs and 17.5% for NVBs, together with xylose content as 13.1% for VBs and 2.8% for NVBs. In addition, uronic acid in NVBs (12.9%) was much higher than that in VBs (5.2%). The content of total (poly)phenolic compounds (35.9%–39.1%) quantified as Klason residues (KRs) and acid-soluble phenolic compounds (ASPs) were similar in both cell types, although there were great differences in the structural characteris-tics of polyphenolic compounds. The pyrogram of VBs clearly showed high intensities of guaiacol and 4-vinylguaiacol together with low intensities of catechol and 4-methylcatechol. On the other hand, that of the NVBs showed opposite trends. These results were confirmed by alkaline nitrobenzene oxidation based on total yields of vanillin and syringaldehyde. Therefore, the accumulation of various polyphenolic compounds in cacao hulls relies strongly on the cell type and is correlated with the development of a secondary wall.
Starting Page	176
Ending Page	180
Page Count	5
File Format	PDF
ISSN	14350211
Journal	Journal of Wood Science
Volume Number	49
Issue Number	2
e-ISSN	16114663
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-02-01
Publisher Place	Tokyo
Access Restriction	Subscribed
Subject Keyword	Wood Science & Technology Materials Science Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Biomaterials Forestry

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