SciELO - Scientific Electronic Library Online

 
vol.26 issue1A simple simulation model of dry matter distribution in broccoli (Brassica sp.) variety Coronado and cabbage (Brassica oleracea) hibrid Delus cultivated in Bogotá plateauComparison of lycopene, β-carotene and phenolic contents of tomato using conventional and ecological horticultural practices, and arbuscular mycorrhizal fungi (AMF) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Agronomía Colombiana

Print version ISSN 0120-9965

Abstract

ORTIZ, Luz Yineth  and  FLOREZ, Víctor Julio. Comparative quantification of abscisic acid and cytokinins on tuberization process in Solanum tuberosum L. and Solanum phureja Juz. et Buk.. Agron. colomb. [online]. 2008, vol.26, n.1, pp.32-39. ISSN 0120-9965.

Of all 30 potato varieties cultivated in Colombia only 10 possess a commercial importance. Among other factors, this number is limited by the action of endogenous hormones that accelerate different phases of tuberization process, especially in the earliest species. In this work, the samples of tubers from different potato species Solanum tuberosum L. vars. ICA-Unica, Tuquerreña and Solanum phureja Juz. et Buk. var. Yema de Huevo were collected at the phenological stages of development 03, 10 and 40. Later, the concentrations of abscisic acid in the acid fraction and ones of cytokinins in the organic fraction of the extracts were determined by high performance liquid chromatography. The results in studied varieties show a relationship between the early tuberization and ABA absence, while the periods of deep latency were related with ABA presence; otherwise, the cytokinin levels were high in the varieties with early tuberization. That is to say, it was found in S. phureja Juz. et Buk. var. Yema de Huevo, characterized by early tuberization, low ABA concentrations and considerable levels of cytokinins, whereas, in varieties with periods of prolonged latency, such as ICA-Unica and, especially, Tuquerreña, ABA concentrations were considerable, but those of cytokinin not.

Keywords : phytoregulators; potato; HPLC.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License