SciELO - Scientific Electronic Library Online

 
vol.68 número1Salt stress induced damages on the photosynthesis of physic nut young plantsStomatal behavior and components of the antioxidative system in coffee plants under water stress índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Scientia Agricola

versión impresa ISSN 0103-9016

Resumen

BEHBAHANI, Mandana; SHANEHSAZZADEH, Mehrnaz  y  HESSAMI, Mohamad Javad. Optimization of callus and cell suspension cultures of Barringtonia racemosa (Lecythidaceae family) for lycopene production. Sci. agric. (Piracicaba, Braz.) [online]. 2011, vol.68, n.1, pp. 69-76. ISSN 0103-9016.  http://dx.doi.org/10.1590/S0103-90162011000100011.

Lycopene is present in a range of fresh fruits and vegetables, especially in the leaves of Barringtonia racemosa. The traditional lycopene extraction from the plant is being employed instead of an easy propagation technique like cell culture process from the leaf explants. We intend to assess how lycopene could be extracted via tissue culture under light (illuminance: 8,200 lux under white fluorescent lamps, photoperiod 16 h per day at 25ºC) and dark. Leaf explants of Barringtonia racemosa were cultured on modified Murashige and Skoog (MS), Woody Plant Medium (WPM) and B5 media, supplemented with different concentrations of 2,4-Dichlorophenoxyacetic acid (2,4-D). Optimal conditions for callus induction and maintenance under both dark and light were investigated, and growth and lycopene accumulation were evaluated. Among media with different concentrations of 2,4-D, fast growing, friable callus initiated within three weeks after culturing on WPM basal medium supplemented with 2.0 mg L-1 (weight per volume) of 2,4-D, whereas callus induction in explants cultured on all other media started only after five weeks. Calli were subcultured once every fortnight. Pale yellow and green calli developed under conditions of dark and light respectively were then selected for evaluation of their lycopene contents. An improved reversed phase of high performance liquid chromatography (HPLC) method was used for a selective chemical determination of the lycopene content. Light induced lycopene production; and likewise maximum lycopene level incubated in light was higher than those incubated in darkness. The best growth rates of callus and cell suspension were achieved in WPM and B5 media respectively. The production of lycopene was growth-dependent through analysis of growth and lycopene content of both callus and cell suspension cultures.

Palabras llave : Powderpuff tree; carotene; phytochemical; plant micropropagation; growth hormones.

        · resumen en Portugués     · texto en Inglés     · pdf en Inglés