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trans zeatin/koruza
Povezava se shrani v odložišče
13 rezultatov
Concentration Gradients of trans-Zeatin Riboside and trans-Zeatin in the Maize Stem: Measurement by a Specific Enzyme Immunoassay.
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Prijava / prijava
A sensitive, specific enzyme immunoassay (EIA) for trans-zeatin riboside (ZR) and trans-zeatin (Z) in the 0.3 to 30 picomole range has been described. The reliability of the method for measuring ZR + Z in partially purified extracts of Zea mays L. tissues was verified by highperformance liquid
Phytohormone levels in germinating seeds of Zea mays L. exposed to selenium and aflatoxines.
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Seeds of Zea mays L. were exposed to aflatoxine B1 (AFB1), aflatoxine G1 (AFG1) and selenium (Se) alone and in combination and allowed to germinate. Phytohormone levels of GA-like substances (GAs), trans-Zeatin (t-Z) and Indole-3-acetic acid (IAA) were determined by High Performance Liquid
Trans-Zeatin inhibits UVB-induced matrix metalloproteinase-1 expression via MAP kinase signaling in human skin fibroblasts.
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Prijava / prijava
Ultraviolet (UV) irradiation induces the expression of matrix metalloproteinases (MMPs), disturbing the metabolism of extracellular matrix (ECM), and causes the characteristic changes of photoaging in skin. Inhibition of induction of MMPs is suggested to alleviate photoaging induced by UV
Kinetic and chemical analyses of the cytokinin dehydrogenase-catalysed reaction: correlations with the crystal structure.
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CKX (cytokinin dehydrogenase) is a flavoprotein that cleaves cytokinins to adenine and the corresponding side-chain aldehyde using a quinone-type electron acceptor. In the present study, reactions of maize (Zea mays) CKX with five different substrates (N6-isopentenyladenine, trans-zeatin, kinetin,
Cytokinin-binding protein (70 kDa) from etioplasts and amyloplasts of etiolated maize seedlings and chloroplasts of green plants and its putative function.
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Prijava / prijava
Cytokinins regulate chloroplast differentiation and functioning, but their targets in plastids are not known. In this connection, the plastid localization of the 70 kDa cytokinin-binding protein (CBP70) was studied immunocytochemically in 4-d-old etiolated maize seedlings (Zea mays L., cv. Elbrus)
Cytokinin-binding protein (70 kDa): localization in tissues and cells of etiolated maize seedlings and its putative function.
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Prijava / prijava
The distribution pattern of a 70 kDa cytokinin-binding protein (CBP70) was studied in 4-d-old etiolated maize seedlings (Zea mays L., cv. Elbrus). CBP70 was detected in crude protein extracts of all root zones and shoot parts by western blotting and by the sandwich ELISA (enzyme-linked immunosorbent
O-glucosylation of cis-zeatin in maize. Characterization of genes, enzymes, and endogenous cytokinins.
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trans-Zeatin is a major and ubiquitous cytokinin in higher plants. cis-Zeatin has traditionally been viewed as an adjunct with low activity and rare occurrence. Recent reports of cis-zeatin and its derivatives as the predominant cytokinin components in some plant tissues may call for a different
A highly selective biosensor with nanomolar sensitivity based on cytokinin dehydrogenase.
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Prijava / prijava
We have developed a N6-dimethylallyladenine (cytokinin) dehydrogenase-based microbiosensor for real-time determination of the family of hormones known as cytokinins. Cytokinin dehydrogenase from Zea mays (ZmCKX1) was immobilised concurrently with electrodeposition of a silica gel film on the surface
Ligand-binding properties and subcellular localization of maize cytokinin receptors.
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The ligand-binding properties of the maize (Zea mays L.) cytokinin receptors ZmHK1, ZmHK2, and ZmHK3a have been characterized using cytokinin binding assays with living cells or membrane fractions. According to affinity measurements, ZmHK1 preferred N(6)-(Δ(2)-isopentenyl)adenine (iP) and had nearly
Molecular characterization of cytokinin-responsive histidine kinases in maize. Differential ligand preferences and response to cis-zeatin.
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Genes for cytokinin-responsive His-protein kinases (ZmHK1, ZmHK2, and ZmHK3a) were isolated from maize (Zea mays). Heterologous expression of each of the ZmHKs in Escherichia coli having the DeltarcsC and cpslacZ genetic background conferred cytokinin-inducibility of lacZ expression on the bacteria.
Topolins and hydroxylated thidiazuron derivatives are substrates of cytokinin O-glucosyltransferase with position specificity related to receptor recognition.
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Glucosides of trans-zeatin occur widely in plant tissues, formed either by O-glucosylation of the hydroxylated side chain or N-glucosylation of the purine ring structure. O-Glucosylation is stereo-specific: the O-glucosyltransferase encoded by the Phaseolus lunatus ZOG1 gene has high affinity for
Endogenous hormones and expression of senescence-related genes in different senescent types of maize.
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Levels of cytokinins and abscisic acid (ABA) and the expression of senescence-related genes were investigated in two maize (Zea mays L.) cultivars of different senescence type, cv. P3845 (stay-green) and cv. Hokkou 55 (earlier senescent), in a field study. The delay in leaf senescence in P3845 was
Nitrogen-dependent accumulation of cytokinins in root and the translocation to leaf: implication of cytokinin species that induces gene expression of maize response regulator.
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We have described the spatial and temporal accumulation pattern of various cytokinin species in roots, xylem sap and leaves during the resupply of nitrogen in maize. Upon addition of nitrate to nitrogen-depleted maize plants, isopentenyladenosine-5'-monophosphate (iPMP) started to accumulate in
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