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Solid-phase extraction of cytokinins from aqueous solutions with C18 cartridges and their use in a rapid purification procedure

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Abstract

Eleven cytokinins-including bases, ribosides, glucosides, and ribotides-were tested for their retention on C18 cartridges that were washed with 40 mL of water or a dilute acid at pH 3. Cytokinins were then eluted with methanol and analyzed by high performance liquid chromatography (HPLC). All pure cytokinin were well retained when the cartridge was washed with water, but Z and (diH)Z were less well retained at pH 3. The ribotides required 80% methanol for elution. Cotton leaf tissue (500 mg dry wt) was spiked with cytokinins, extracted with 80% methanol, and the extract bulk purified with hexane, insoluble polyvinylpyrrolidone, and minicolumns (strong anion exchange, amino, and C18 cartridges). Ribotides, added to leaf tissue, could not be recovered as ribotides; it was necessary to hydrolyze and purify them as ribosides. The cytokinins were separated and analyzed by HPLC on strong cation exchange and C18 columns. Recoveries through the entire procedure averaged 70%.

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Abbreviations

(diH)Z:

Dihydrozeatin

(diH)Z:

dihydrozeatin riboside

(diH)[9R]Z:

trans-zeatin

Z:

t-zeatin riboside

[9R]Z:

t-zeatin-O-glucoside

(OG)Z:

t-zeatin riboside-O-glucoside

(OG)[9R]Z:

t-zeatin riboside-5′-monophosphate

[9R-5′P]Z:

N6(Δ2-isopentenyl)adenine

iP:

N6(Δ2-isopentenyl)adenosine

[9R]iP:

N6(Δ2-isopentenyl)adenosine-5‵-monophosphate-[9R-5′P]iP

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Authors and Affiliations

  1. Agricultural Research Service, Western Cotton Research Laboratory, U. S. Department of Agriculture, 4135 E. Broadway, Phoenix, Arizona, USA

    Gene Guinn & Donald L. Brummett

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  1. Gene Guinn
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  2. Donald L. Brummett
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Guinn, G., Brummett, D.L. Solid-phase extraction of cytokinins from aqueous solutions with C18 cartridges and their use in a rapid purification procedure. Plant Growth Regul 9, 305–314 (1990). https://doi.org/10.1007/BF00024916

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  • DOI: https://doi.org/10.1007/BF00024916

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