Micropropagation of Philodendron erubescens with the use of different biostimulators

Absztrakt

In order to find the best type and concentration of biostimulators, Philodendron erubescens in vitro plants were propagated on medium with 0.1-0.8 ml l-1 Pentakeep-V, the same dosages of Humus FW and 1-8 ml l-1 Titavit (in the case of the control stock, none of them were added). After the multiplication period, plants were acclimatized in greenhouse without any biostimulator treatment (as substrate, white peat and vermiculite mixture in 2:1 ratio was used). In general, most of the in vitro plants' survival ratio was higher than 80-85%, and 2-4 ml l-1 Titavit and 0.2 ml l-1 Humus FW effected the best values (95-100%); however, the latter product resulted the fewest shoot and root, the shortest leaves and roots, and the lowest leaf chlorophyll (a+b) contents. Pentakeep-V was suitable for faster shoot development and optimal plant elongation, while Titavit rather stimulated rooting and enhanced leaf pigment level, but only in lower concentrations, because the highest dose decreased all plant parameters.