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Cytokinins and Plant Phenolics: A Cooperative Metabolism

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F06%3A00002621" target="_blank" >RIV/61989592:15310/06:00002621 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Cytokinins and Plant Phenolics: A Cooperative Metabolism

  • Original language description

    Cytokinin dehydrogenase (CKX) is a key enzyme in regulation of the levels of active cytokinins in plants. We have previously reported that CKX can use products of oxidation of plant phenolics by tyrosinase and peroxidase as acceptors of electrons from oxidized cytokinin and that the phloem sap of maize seedlings contains unknown phenolic precursor of this acceptor. In the present work we investigated a set of substituted phenolic acids for their ability to serve as precursors of electron acceptors in the CKX reaction and analyzed the phloem sap of maize seedlings for the presence of carboxylic phenolic acids using HPLC with a Q-TOF detector. Only p-coumaric, caffeic and chlorogenic acids were converted to effective electron acceptors in the presence ofmushroom tyrosinase. Ferulic acid showed weak activity and analogous compounds derived from 4-hydroxybenzoic acid were not active. Compounds effective in in vitro CKX assay were identified in the phloem sap.

  • Czech name

    Cytokininy a fenolové látky v rostlinách: kooperativní metabolismus

  • Czech description

    Cytokinindehydrogenasa je klíčovým enzymem v regulaci hladin aktivních cytokininů. Fenolické látky oxidované polyfenoloxidasami slouží jako elektronové akceptory tohoto enzymu. Sledovali jsme schopnost aktivovat reakci cytokinindehydrogenasy řadou přirozených fenolických kyselin.

Classification

  • Type

    C - Chapter in a specialist book

  • CEP classification

    CE - Biochemistry

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA522%2F05%2F0448" target="_blank" >GA522/05/0448: Isolation and identification of physiological electron acceptor of plant cytokinin dehydrogenase and interaction with low molecular mass compounds</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Book/collection name

    Floriculture, Ornamental and Plant Biotechnology: Advances and Topical Issues

  • ISBN

    978-4-903313-00-9

  • Number of pages of the result

    646

  • Pages from-to

    379-384

  • Number of pages of the book

  • Publisher name

    Global Science Books

  • Place of publication

    Isleworth

  • UT code for WoS chapter