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zeatin riboside/rak
Povezava se shrani v odložišče
12 rezultatov
A comparative study of cytokinesins I and II and zeatin riboside: a reply to Carlos Miller.
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Prijava / prijava
Two cell-division-promoting factors, which have partition coefficients of 1.9 and 2.75 determined by 500-tube countercurrent distribution in a butanolwater system, have been repeatedly isolated in this laboratory from crown gall tumor tissues of Vinca rosea L. These substances have been given the
Mass-spectrometric quantitation of cytokinins in tobacco crown-gall tumours induced by mutated octopine Ti plasmids of Agrobacterium tumefaciens.
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Prijava / prijava
The levels of the major cytokinins, zeatin, zeatin riboside, zeatin riboside-5'-monophosphate and zeatin-7-glucoside were measured in tobacco (Nicotiana tabacum L.) crown-gall tissues carrying insertion and deletion mutations in the T-DNA. Measurements were made by combined gas chromatography-mass
Dynamics of Endogenous Cytokinins during the Growth Cycle of a Hormone-Autotrophic Genetic Tumor Line of Tobacco.
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Prijava / prijava
The profile of endogenous cytokinins in a genetic tumor line of tobacco, namely, Nicotiana glauca (Grah.) x Nicotiana langsdorffii (Weinm.), following 1 to 10 weeks of growth on solid medium was determined by radioimmunoassay. (3)H-labeled cytokinins of high specific activity were added during
Hormonal regulation of zeatin-riboside accumulation by cultured tobacco cells.
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Auxin (11 μM α-naphthaleneacetic acid) and cytokinin (1.4 μM kinetin) regulate cytokinin accumulation by cytokinin-requiring (C(-)) and cytokinin-autotrophic (C(+)) lines of Havana 425 tobacco (Nicotiana tabacum L.) tissues. No trans-zeatin riboside (ZR) (<0.5 pmol·g(-1) fresh weight) was detected
Physiology of Hormone Autonomous Tissue Lines Derived From Radiation-Induced Tumors of Arabidopsis thaliana.
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Prijava / prijava
gamma-Radiation-induced tumors of Arabidopsis thaliana L. have been produced as a novel approach to isolation of genes that regulate plant development. Tumors excised from irradiated plants are hormone autonomous in culture and have been maintained on hormone-free medium for up to 4 years. Five
The plant hormone zeatin riboside inhibits T lymphocyte activity via adenosine A2A receptor activation.
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Prijava / prijava
Cytokinins are plant hormones that play an integral role in multiple aspects of plant growth and development. The biological functions of cytokinins in mammalian systems are, however, largely uncharacterized. The naturally occurring cytokinin zeatin riboside has recently been demonstrated to
Quantitation of cytokinins in biological samples using antibodies against zeatin riboside.
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Prijava / prijava
The cross-reactivity of antibodies elicited in rabbits against zeatin riboside, to a wide range of naturally occurring cytokinins, was examined. As well as to zeatin riboside, the antisera cross-reacted to a considerable extent with zeatin, lupinic acid, zeatin-9-glucoside, zeatin riboside
Inhibitory effects of plant growth regulators on xanthine oxidase.
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Prijava / prijava
Several plant hormones and analogues were tested for their inhibitory effects on xanthine oxidase. The flavoprotein enzyme, xanthine oxidase, catalyses the oxidation of hypoxanthine to xanthine and then xanthine to uric acid which has lambda max 295 nm. Uric acid was thus the basis for a
Cell division promoting activity of naturally occurring dehydrodiconiferyl glucosides: do cell wall components control cell division?
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Prijava / prijava
Naturally occurring isomers of the dehydrodiconiferyl glucosides have been isolated from Vinca rosea crown gall tumors and have been tested for cell division promoting activities in the tobacco pith and leaf assay systems. The enantiomeric isomers A and B are active, although they are required at
The effect of auxin concentration on cytokinin stability and metabolism.
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Prijava / prijava
The stability of [(3)H]zeatin riboside supplied to freshly excised tobacco pith explants was found to be inversely related to α-naphthaleneacetic acid concentration in the incubation medium. At higher concentrations of α-naphthaleneacetic acid greater breakdown of [(3)H]zeatin riboside was indicated
Putative role of the adenosine A(3) receptor in the antiproliferative action of N (6)-(2-isopentenyl)adenosine.
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Prijava / prijava
We tested a panel of naturally occurring nucleosides for their affinity towards adenosine receptors. Both N (6)-(2-isopentenyl)adenosine (IPA) and racemic zeatin riboside were shown to be selective human adenosine A(3) receptor (hA(3)R) ligands with affinities in the high nanomolar range (K (i)
Anticancer activity of natural cytokinins: a structure-activity relationship study.
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Prijava / prijava
Cytokinin ribosides (N(6)-substituted adenosine derivatives) have been shown to have anticancer activity both in vitro and in vivo. This study presents the first systematic analysis of the relationship between the chemical structure of cytokinins and their cytotoxic effects against a panel of human
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