Blar i forfatter "Riihinen, Kaisu"

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    • Changes in the Proanthocyanidin Composition and Related Gene Expression in Bilberry (Vaccinium myrtillus L.) Tissues 

      Suvanto, Jussi; Karppinen, Katja; Riihinen, Kaisu; Jaakola, Laura; Salminen, Juha-Pekka (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-16)
      Berries of genus <i>Vaccinium</i> are rich in flavonoids and proanthocyanidins (PAs). We studied the PA composition and biosynthesis in bilberry (<i>Vaccinium myrtillus L.</i>) tissues and during fruit development. Soluble PAs, analyzed by UHPLC–MS/MS, were most abundant in stem and rhizome with the mean PA polymerization level varying between 4 and 6 in all tissues. Both A- and B-type PAs were ...

    • Metabolic and molecular analysis of white mutant Vaccinium berries show down-regulation of MYBPA1-type R2R3 MYB regulatory factor 

      Primetta, Anja; Karppinen, Katja; Riihinen, Kaisu; Jaakola, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-07-14)
      Main conclusion MYBPA1-type R2R3 MYB transcription factor shows down-regulation in white mutant berries of Vaccinium uliginosum deficient in anthocyanins but not proanthocyanidins suggesting a role in the regulation of anthocyanin biosynthesis. <p>Berries of the genus Vaccinium are among the best natural sources of flavonoids. In this study, the expression of structural and regulatory flavonoid ...