Topic
Zeatin
About: Zeatin is a research topic. Over the lifetime, 2467 publications have been published within this topic receiving 64092 citations. The topic is also known as: Zeatin & (E/Z)-zeatin.
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TL;DR: The development of virescent flowers as a result of the infestation of Catharanthus roseus plants by different “strains” of mycoplasmas could be correlated with marked changes in the levels of endogenous cytokinins within the flowers, mature leaves and roots of the plants.
Abstract: The development of virescent flowers as a result of the infestation of Catharanthus roseus plants by different “strains” of mycoplasmas could be correlated with marked changes in the levels of endogenous cytokinins within the flowers, mature leaves and roots of the plants In all cases, the cytokinin levels in the roots and mature leaves decreased while that in the flowers increased Three peaks of cytokinin activity which co-eluted with glucosylzeatin, ribosylzeatin and zeatin respectively were detected in these organs No qualitative differences in the cytokinin complement of the infected plants were detected At present it is not known whether or not the mycoplasmas used synthesize cytokinins which upset the cytokinin balance of Catharanthus roseus plants or are responsible for changes in the synthetic capacity and/or translocation pattern of the infested plants
28 citations
TL;DR: Cytokinins were found to have considerably higher hormonal activity as free bases than as ribosides, which will be discussed in relation to the chemical identity of the celldivision factor (CDF) isolated from crown gall tumors of Vinca rosea L.
Abstract: The activities of the cytokinins benzyladenine (BA), 6-(3-methylbut-2-enylamino)purine (IPA) and zeatin in promoting bud formation in protonemata of Funaria hygrometrica (L.) Sibth. were compared to the biological activities of the corresponding ribosides. Cytokinins were found to have considerably higher hormonal activity as free bases than as ribosides. This observation will be discussed in relation to the chemical identity of the celldivision factor (CDF) isolated from crown gall tumors of Vinca rosea L.
27 citations
TL;DR: In vitro vegetative multiplication of sugarbeet was obtained by culturing of inflorescence explants and Gibberellic acid (GA3) enhanced the process.
Abstract: In vitro vegetative multiplication of sugarbeet was obtained by culturing of inflorescence explants. Subapical segments or 5-mm-long tips from nine varieties developed axillary shoots (up to 50 per tip) on a medium containing indolebutyric acid (IBA) and benzylaminopurine (BAP). Zeatin was ineffective as cytokinin. Gibberellic acid (GA3) enhanced the process. Such vegetative shoots were subsequently isolated and were each allowed to develop up to 20 supplementary axillary shoots on a multiplication medium containing IBA, BAP, and naphthaleneacetic acid (NAA). Rooting of shoots was obtained in the absence of growth regulators and plants were established.
27 citations
TL;DR: Tissue cultures are the only effective way to proliferate this valuable species (Daphne mezereum) and researches may help in solving the problem of reproduction of other woody plants, as well as micropropagation.
Abstract: Tissue cultures are the only effective way to proliferate this valuable species (Daphne mezereum). These researches may help in solving the problem of reproduction of other woody plants. Daphne mezereum L. commonly known as February daphne or mezereon is a decorative shrub from the family Thymelaeaceae. It is a valuable nursery plant due to its high ornamental values, but its propagation by traditional methods is ineffective, therefore, little profitable. Micropropagation may be a good alternative way to produce this ornamental shrub. The experiment aimed to examine the effect of cytokinins (meta-Topolin, benzyladenine, and zeatin) and other growth regulators (gibberellic acid GA3 and auxin 1-naphthalene acetic acid NAA) added to the Murashige and Skoog (MS) and Woody Plant Medium (WPM) nutrients on regeneration of explants of D. mezereum ‘Alba’. In the all treatments containing plant growth regulators (PGR), 100% regeneration of explants has been observed. The highest number of shoots, after 6 weeks of culture, was produced on MS medium with 1 mg·L−1 BA and 0.1 mg·L−1 NAA. The longest shoots were produced on MS medium with 0.1 mg·L−1 of gibberellic acid (GA3) and 1 mg·L−1 of meta-Topolin (mT). Generally, the type and concentration of plant growth regulators had an essential effect on regeneration and growth of shoots of Daphne mezereum ‘Alba’ in the in vitro culture.
27 citations
TL;DR: In this paper, a halotolerant actinomycete Streptomyces sp. KLBMP5084 obtained from the root of halophyte Limonium sinense was evaluated for antifungal activity in vitro and applied for the growth promoting of tomato seedlings under salt stress.
27 citations