Secondary Metabolites in the Rhizomes of Diploid and Tetraploid Gingers (<i>Zingiber officinale</i> Roscoe)

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  • 二倍体および四倍体ショウガの二次代謝成分

Abstract

<p>　The rhizomes of diploid and tetraploid gingers (Zingiber officinale Roscoe) were studied for their composition of volatile and pungent compounds. The tetraploid ginger was derived from the diploid ginger by in vitro colchicine techniques. GC and GC-MS analyses revealed that the volatile compounds in the diploid and tetraploid gingers exhibited a similar compositional pattern. The pungent compounds were also isolated from the tetraploid ginger rhizomes and their structures were identified as [6]-gingerol and [6]-dehydroparadol by chemical and spectroscopic evidence. The HPLC analysis showed that the composition of pungent compounds in tetraploid ginger was not so different from that of diploid ginger. Therefore, tetraploid ginger showed a potential alternative to diploid ginger, since tetraploid ginger has several advantages over diploid ginger such as pollen fertility, germinability, and larger size.</p>

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