Počet záznamů: 1
Function of plant defense secondary metabolite in cytokinin degradation
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SYSNO ASEP 0359310 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Function of plant defense secondary metabolite in cytokinin degradation Tvůrce(i) Frébortová, Jitka (UEB-Q) RID, ORCID Celkový počet autorů 1 Zdroj.dok. Plant Signaling & Behavior. - : Taylor & Francis - ISSN 1559-2316
Roč. 5, č. 5 (2010), s. 523-525Poč.str. 3 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova cytokinin dehydrogenace ; 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one ; phenoxyl radiál Vědní obor RIV EF - Botanika CEP GA522/05/0448 GA ČR - Grantová agentura ČR GA301/08/1649 GA ČR - Grantová agentura ČR CEZ AV0Z50380511 - UEB-Q (2005-2011) Anotace The flavoenzyme cytokinin dehydrogenace (CKX) catalyzes an irreversible deactivation of plant hormones cytokinins through oxidative cleavage of the cytokinin side chain to Šeld adenine or adenosine and an aldehyde. In the catalytic cycle of CKX, the cytokinin-reduced flavin cofactor is reoxidized by a suitable electron acceptor. We have recently demonstrated that the oxidation products of natural hydroxamic acid 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) function as effective electron acceptors of apoplastic CKX from maize. The stable oxidation product of DIMBOA reacting with peroxidase or laccase was identified as 4-nitrosoresorcinol 1-monomethyl ether (coniferron), which, however, is only a weak electron acceptor of CKX. Further analyses suggested formativ of transient free radicals that were estimated to reoxidize the cytokininreduced flavin cofactor of CKX with the rates comparable to those of flavin reduction. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2011
Počet záznamů: 1