Characteristics of the composition of caucasian blackberry (Rubus caucasicus L.) leaves as a raw material for tea production

The composition of Caucasian blackberry (Rubus caucasicus L.) six-leaf shoot was studied. The weight of the stem reached 50% of the total weight shoot. The content of moisture, extractive substances, and phenolic compounds was minimal at the beginning and end of the vegetation season. Phenolic compo...

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Bibliographic Details
Published in:Applied biochemistry and microbiology 2008-11, Vol.44 (6), p.647-651
Main Authors: Melkadze, R. G, Chikovani, N. Sh, Kakhniashvili, E. Z
Format: Article
Language:English
Subjects:
Amino acids
Berries
Biochemistry
Biomedical and Life Sciences
Enzymes
Fruits
Leaves
Life Sciences
Medical Microbiology
Microbiology
Moisture content
Phenols
Plant biology
Proteins
Rubus
Tea
Vegetation
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Summary:The composition of Caucasian blackberry (Rubus caucasicus L.) six-leaf shoot was studied. The weight of the stem reached 50% of the total weight shoot. The content of moisture, extractive substances, and phenolic compounds was minimal at the beginning and end of the vegetation season. Phenolic compounds were represented by catechins, leukoanthocyanidins, and flavonols. The most abundant phenolic compounds in all parts of the blackberry shoot were leukoanthocyanidins, which accounted for approximately 50% of all compounds of this class. Phenolic compounds accumulated most actively in July and August. The average content of free amino acids in the blackberry leaf during the vegetation season was 26.68 mg/g. Among the total free amino acids, eleven have been identified, five of which proved to be essential (His, Arg, Met, Leu, Val) and accounted for 40 % of the total amount of amino acids. The oxidability of acetone extract of the blackberry leaf was compared to the oxidability of total phenolic compounds and tea tannin. The tea product obtained from the blackberry leaf had good organoleptic parameters and a saturated extractive complex.
ISSN:0003-6838
1608-3024
DOI:10.1134/S000368380806015X