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Type: Artigo de periódico
Title: Cytokinin-like effects of caffeine in bioassays
Author: Vitoria, AP
Mazzafera, P
Abstract: Cytokinin-like effects of pure caffeine were tested in bioassays specific for this hormonal activity [radish cotyledon growth and chlorophyll (Chl) biosynthesis in cucumber cotyledon and tobacco cell suspension] and in cell elongation bioassays [elongation of segments from soybean internode and internode elongation in dwarf cultivars of guandu (Cajanus cajan) and mucuna (Mucuna deeringiana)]. 6-Benzylaminopurine and kinetin (KIN) were used for comparison with caffeine. Although weaker than those given by cytokinins, positive responses were observed in all specific bioassays and in elongation of soybean internodes. A remarkable synergistic effect between caffeine and KIN was observed for the synthesis of Chl in the tobacco cell suspension bioassay, in which different concentrations of the alkaloid were combined with a single concentration of KIN, The hormone-like effect of caffeine might be related to the resemblance between caffeine and adenine derivatives.
Subject: 6-benzylaminopurine
Cajanus cajan
chlorophyll biosynthesis
Cucumis sativus
Glycine max
Mucuna deeringiana
Nicotiana tabacum
Raphanus sativus
Country: República Checa
Editor: Inst Experimental Botany, Acad Sci Czech Republic
Citation: Biologia Plantarum. Inst Experimental Botany, Acad Sci Czech Republic, v. 40, n. 3, n. 329, n. 335, 1998.
Rights: fechado
Date Issue: 1998
Appears in Collections:Unicamp - Artigos e Outros Documentos

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