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
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DOI - Digital Object Identifier
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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
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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
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Publisher name
Global Science Books
Place of publication
Isleworth
UT code for WoS chapter
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