The root systems of higher plant consist of primary, lateral, and adventitious roots. There is a current hypothesis, named ‘root apical dominance’, that root-derived suppressor negatively regulates the formation of adventitious and lateral roots. According to this hypothesis, we have studied the mechanisms involved in the regulation of adventitious and lateral root formation. trans-zeatin ribos...

Contents of trans-zeatin riboside (ZR), dihydrozeatin riboside (DZR) and N6-(delta2-isopentenyl) adenosine (iPA) was quantified by an indirect ELISA using polyclonal antibodies, in the roots, xylem sap and leaves of pot grown sunflower plants subjected to water stress (RWC of leaves approximately 65 per cent). The delivery rates of all three cytokinins decreased significantly under stress. Cyto...

When leaves of Bryophyllum marnierianum are detached from the plant, plantlets develop from primordia located at their margins. Leaves excised with a piece of stem attached do not produce plantlets. Severing the major leaf veins overcomes the inhibitory effect of the attached stem, indicating that the control agent is transmitted through the vascular system. A possible mechanism is that an inhi...

The Andean mortiño (Vaccinium floribundum Kunth) grows wild in the northern paramos of South América. berries present potential opportunities for agribusiness, but an efficient technology production plants and is required. On other hand, development plant methods from seeds will allow plants’ accessibility its use breeding programs. objective this study was to develop vitro protocol accelerated...