Efectos de iones y sales en la productividad y acumulación de prolina en Lippia gaveolens H.B.K. Ion and salt effects on the productivity and proline accumulation in Lippia gravolens H.B.K.

Four dynamic conditions to evaluate the effects of stress on production of biomass, essential oils, Thymol, carvacrol and proline accumulation in Lippia graveolens H.B.K. were inves- tigated under greenhouse conditions. A bifactorial design assessed four environmental conditions (factor B): commercial nutritive solu- tion (B0); Water (B1); moderate stress (B2), and intermediate (B3) stress nested under (Factor A) salinity (NaCl) and ion concentration (Cu 2+ ) and (Fe 2+ ) stresses. Average production of fresh weight and number of leaves were reduced under NaCl and both ion concentra- tion conditions. However, there were no significant differences on average for the four environments. The amounts of essential oils were significantly higher under the stressful environments with Fe