Zeatin

Warning

H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]

P264, P264+P265, P280, P302+P352, P305+P351+P338, P321, P332+P317, P337+P317, and P362+P364 (click each P-code to see the statement)

The GHS information provided by 1 company from 1 notification to the ECHA C&L Inventory.

USEPA/Office of Pesticide Programs; Reregistration Eligibility Decision Document - Cytokinin p.v EPA 738-R-95-025 (December 1995). Available from the Database Query page at http://www.epa.gov/pesticides/reregistration/status.htm as of February 9, 2009.

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Kinetin stimulated phosphorylation of protein in floated Chinese-cabbage leaf discs, but inhibited protein phosphorylation in nuclei+chloroplast extracts from Chinese-cabbage or tobacco leaves. Kinetin also inhibited protein phosphorylation in isolated tobacco nuclei or nuclei from carrot secondary-phloem tissue. Purified Chinese-cabbage leaf ribosomes exhibited protein kinase activity which was inhibited by kinetin and zeatin. The ribosome-associated kinase responded to kinetin and zeatin differently from that associated with nuclei+chloroplast preparations. Protein phosphorylation in vitro was not affected by adenosine 3':5'-cyclic monophosphate, indol-3-ylacetic acid or gibberellic acid. It was only inhibited by N(9)-unsubstituted purines, among which the known cytokinins were the most effective inhibitors. The results are discussed in relation to possible similarities between the effects of cytokinins in plant tissues and the effects of adenosine 3':5'-cyclic monophosphate in animal tissues. Both compounds appear to modify the activity of protein kinases and both affect many different cellular processes.

Naturally occurring plant growth hormone; cytokinin originally isolated from sweet corn kernels, Zea mays L. Gramineae.

Cytokinin is a group of plant regulators that promote cell division, leaf expansion and retard leaf aging. Cytokinin is comprised of four naturally occurring cytokinins (derived from aqueous extract of seaweed meal) -- zeatin [6-(4-hydroxy-3-methylbut-trans-2-enylamino)-purine], N6-methylaminopurine, N6-dimethylaminopurine, N6-isopentenylaminopurine, and synthetic cytokinin -- kinetin [6-(furfurylamino)purine]. Cytokinins (i.e. naturally occurring) in aqueous extracts of seaweed meal, are derived from the following algae: Laminaria digitata, Laminaria hyperborea, Fucus serratus and Ascophyllum nodosum.