Characterization of the condensed tannin (proanthocyanidin) from a Group II sorghum

Asquith, T.N. and Izuno, C.C. and Butler, L.G. (1983) Characterization of the condensed tannin (proanthocyanidin) from a Group II sorghum. Journal of Agricultural and Food Chemistry, 31 (6). 1299-1303 .

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Most of the tannin in seeds of high-tannin bird-resistant group III sorghums [Sorghum bicolor] extracts readily into methanol or aqueous acetone. In contrast, tannin of group II sorghums is not extracted by these solvents but is extracted by methanol containing 1% (v/v) HCl. Group II sorghums have been reported to be nutritionally less harmful than group III types, presumably due to differences in their tannins. Purified tannin from a group II sorghum (IS 8768) was compared with tannin purified from a group III sorghum (DeKalb BR 64). No significant differences were found in the properties of the purified tannins. Tannin extractable only in acidic methanol is present along with methanol-extractable tannin in most group III sorghums, especially in immature grain. The differentially extractable tannins do not appear to have a precursor/product relationship

Item Type: Article
Author Affiliation: Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907, USA
Subjects: Plant Protection
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 01 Mar 2012 08:39
Last Modified: 01 Mar 2012 08:39
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