カメリア属の雑種および帰属不明種における葉肉カフェイン,ブラバノール,アミノ酸含量

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  • Caffeine, flavanol and amino acid contentents in leaves of hybrids and species of the section Dubiae in the genus Camellia.
  • カメリア属の雑種および帰属不明種における葉内カフェイン,フラバノール,アミノ酸含量〔英文〕
  • カメリアゾク ノ ザッシュ オヨビ キゾク フメイシュ ニ オケル ヨウナイ

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Caffeine, flavanol and amino acid contents in young leaves of first flush shoots of hybrids and species of section Dubiae in the genus Camellia were investigated. Based on these results, principal component anafysis was performed. All clones of hybrid combinations between C.sinensis and other species such as C.sasanqua and C.japonica contained caffeine, ECG (epicatechin gallate). EGCG (epigallocatechin gallate) and theanine. Since these compounds were not detected in C.sasanqua and C.japonica, they were considered to be suitable chemical markers for hybrids between a species of section Thea and a species of other sections. In chromatographic studies of flavanols, both C, vernalis and C.hiemalis were found to contain high EC (epicatechin) amounts as well as four unidentified components which were detected in C.sasanqua and its hybrids. Therefore, both speciescould be considered to be hybrids resulting from crosses between C.sasanqua and a species of section Calnellia. Chromatogram of C.miyagii and C.tenuiflora did not show these peaks, and there was significant and positive correlation between the flavanol pattern of the latter species and that of C.oleifera. In general, flavanol chromatograms of C.wabisuke with the exception of cv. 'Sukiya' were similar to those of species of the section Camellia. Furthermore, caffeine, EGCG and theanine were not detected in the clones of C.wabisuke. Thus, phytochemically it was difficult to consider that C.wabisuke was related to C.sinensis.

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