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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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Journal Article
TL;DR: The study showed that a formula of MS + ZT 4.0 + NAA 2.0 mg/L yielded higher plant growth and showed that different formula combinations will provide different results for different plant specimens.
Abstract: With MS as basic medium, different plant growth regulators CTK, 6 BA (6 benzyladenine), ZT (Zeatin) and indoleacetic IBA, NAA (indole 3 butyric acid, naphthalene acetic acid) were added to find out the best medium for inducing auxiliary bud and clump bud growth and the medium with the highest multiplication coefficients. The study began testing with a formula of MS+6 BA 0.5+IBA 0.3 mg/L. The study showed that a formula of MS + ZT 4.0 + NAA 2.0 mg/L yielded higher plant growth. The study shows that different formula combinations will provide different results for different plant specimens.

3 citations

Journal ArticleDOI
TL;DR: Depressing effect of Flavonoids on the phytohormones in soybean rhizobia synthesis is probably due to changes in metabolism microsymbiotic bacteria that are not aimed at the synthesis of secondary metabolites and to launch effective nodulating mechanisms, and also the concentration of flavonoid compounds in the nutrient medium.
Abstract: AIM Research the ability of different by effectiveness symbiotic nitrogen-fixing soybean bacteria Bradyrhizobium japonicum to the synthesis of phytohormones-stimulators auxins and cytokinins for the actions of plant flavonoids genistein and naringenin. METHODS Extracellular phytohormonal compound isolated from the supernatant culture liquid of the soybean rhizobia by redistribution of phytohormones in two phases solvent immiscible with each other. Auxins and cytokinins were determined by thin layer spectra densitometry chromatography. RESULTS Shown the ability of symbiotic diastrophic soybean strains to synthesize auxins (4-1067 mg/g of absolutely dry biomass) and cytokinins (141-1554 mg/g of absolutely dry biomass). Cultivation soybean rhizobia in the presence of flavonoid compounds genistein and naringenin leads to the narrowing of the range and reducing the number of phytohormones: unchecked synthesis of indole-3-carboxylic acid, indole-3-carbinol, indole-3-acetic acid hydrazide and zeatin. CONCLUSIONS Depressing effect of flavonoids on the phytohormones in soybean rhizobia synthesis is probably due to changes in metabolism microsymbiotic bacteria that are not aimed at the synthesis of secondary metabolites and to launch effective nodulating mechanisms, and also the concentration of flavonoid compounds in the nutrient medium.

3 citations

01 Jan 1982
TL;DR: Aplasmalemma-eonched membrane preparation frometiolated soybean hypocotyls possesses anactive ATP-dependentcalcium pump which leads to calcium accumulation whenayed by themethods of GrossandMarme in 1978.
Abstract: Aplasmalemma-eonched membrane preparation frometiolated soybean (Glyine maxL., cv.Wayne) hypocotyls possesses anactive ATP-dependentcalcium pumpwhich leads tocalcium accumulation whenassayed by themethods ofGrossandMarme(1978, ProcNatlAcadSciUSA75: 1232-1236). Two-hour treatment ofsegments fromtheelongating zoneof thehypocotyl withgrowth-promoting concentrations ofindoleacetic acid gives upto100percent increase inthecalcium transport activity. Conversely, similar pretreatment withzeatin orother cytokinins isinhibitory. Inthemeristematic andmaturing zonesofthehypocotyl, zeatin hasthe opposite effect ofpromoting calcium transport activity. Onefacet ofcellgrowth regulation mayliewithhormonaily mediated changes inefflux pumping ofcalcium.

3 citations

Journal ArticleDOI
28 Feb 2018
TL;DR: Correlations between root architecture and hormone responses were quite variable across the species, implying that a particular root foraging behavior is probably not controlled by the same biochemical pathway in all species.
Abstract: (1) Background: Plant roots respond to nutrients through root architecture that is regulated by hormones. Strong inter-specific variation in root architecture has been well documented, but physiological mechanisms that may control the variation have not. (2) Methods: We examined correlations between root architecture and hormones to seek clues on mechanisms behind root foraging behavior. In the green house at Beijing Normal University, hydroponic culture experiments were used to examine the root responses of four species—Callistephus chinensis, Solidago canadensis, Ailanthus altissima, Oryza sativa—to two nitrogen types (NO3− or NH4+), three nitrogen concentrations (low, medium, and high concentrations of 0.2, 1, and 18 mM, respectively) and two ways of nitrogen application (stable vs. variable). The plants were harvested after 36 days to measure root mass, 1st order root length, seminal root length for O. sativa, density of the 1st order laterals, seminal root number for O. sativa, the inter-node length of the 1st order laterals, and root hormone contents of indole-3-acetic acid, abscisic acid, and cytokinins (zeatin + zeatinriboside). (3) Results: Species differed significantly in their root architecture responses to nitrogen treatments. They also differed significantly in hormone responses to the nitrogen treatments. Additionally, the correlations between root architecture and hormone responses were quite variable across the species. Each hormone had highly species-specific relationships with root responses. (4) Conclusions: Our finding implies that a particular root foraging behavior is probably not controlled by the same biochemical pathway in all species.

3 citations

Book ChapterDOI
25 Apr 2012
TL;DR: One of the richest sources of CKs in various plants species are developing seeds, where zeatin, a major natural CK, was first discovered in developing seeds of maize (Letham, 1963), and where CK accumulation with seed cell division profiles in several plant species is coincidence.
Abstract: One of the richest sources of CKs in various plants species are developing seeds. In fact, zeatin, a major natural CK, was first discovered in developing seeds of maize (Letham, 1963). Not surprisingly, developing seeds of maize, rice and Lupinus albus have played a major role in CK research (reviewed in Emery & Atkins, 2005). A major focus of these studies has been on the possible role of CKs in sink strength of developing seeds. The role of CKs in controlling sink strength is inferred largely from (a) the well known role of CK in stimulating cell division that may lead to increased organ size of the sink tissue, and (b) the coincidence of CK accumulation with seed cell division profiles in several plant species (Dietrich et al., 1995; Arnau et al., 1999; Yang et al., 2002).

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202333
2022103
202135
202034
201932
201848