Essential oils, amino acids and polyphenols changes in salt-stressed Thymus vulgaris exposed to open–field and shade enclosure

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“…(Table 3 and 4). These values differ from those of Zrig et al (2016), who reported 6.46 mg gallic acid g -1 PF (average) of total phenols in Thymus vulgaris cultivated in shade house, with a contribution of 500-700 mM m -2 s-1 PAR. These last conditions of luminosity were similar to those recorded in greenhouse in this work, which suggests that total phenolic content could be sensitive to light.…”

“…En condiciones de salinidad, las plantas necesitan estrategias para sobrevivir en ambientes hostiles, uno de los mecanismos fisiológicos más eficientes para sobrevivir a condiciones de estrés, es el ajuste osmótico en el que los tejidos reducen su potencial osmótico mediante la acumulación de una variedad de metabolitos de tal manera que éstos les ayuden a conservar la turgencia (Hayat et al, 2012;Wu et al, 2013;Zrig et al, 2016). Al inicio del experimento se observó un incremento progresivo del contenido de prolina conforme la concentración de la solución nutritiva aumentó, adicionalmente, la disminución observada a través del tiempo permite inferir que la edad de la planta influyó en su capacidad de sintetizar y regular la concentración de este aminoácido durante el tiempo que dura el estrés (Xu et al, 2014).…”

“…where the proline content increased in field conditions compared to shade-enclosure conditions, which suggests that the conditions in the greenhouse somehow intensified the induced stress, which stimulated a greater synthesis of this metabolite (Zrig et al, 2016). In addition to acting as osmolyte, under various conditions of abiotic stress, proline functions as a molecular chaperone that preserves the integrity of proteins and membranes, stabilizes the pH of the cytosol and neutralizes reactive oxygen species (Kishor et al, 2005;Hayat et al, 2012).…”

“…In conditions of salinity, plants need strategies to survive in hostile environments. One of the most efficient physiological mechanisms to survive stress conditions is osmotic adjustment in which tissues reduce their osmotic potential by accumulating a variety of metabolites which allow them to maintain turgor (Hayat et al, 2012;Wu et al, 2013;Zrig et al, 2016). At the beginning of the experiment, a progressive increase in the proline content was observed as the concentration of the nutrient solution increased.…”

Essential Oil Composition, Total Phenolic Content, and Antioxidant Activity - Determined from Leaves, Flowers and Stems of Origanum Vulgare L. Var. Aureum

“…For many centuries, medicinal and aromatic plants (MAPs) have been used for their unaccounted properties. Recently, many industrial branches have shown interest again in MAPs and their bioactive compounds with potential applications in food industry, nutraceuticals, cosmetics and perfumes (Moisă et al, 2017;Pereira et al, 2013;Zrig et al, 2016,). Different plants belonging to the Lamiaceaefamily are dispersed worldwide and represent the 6 th largest plant family containing over 200 genera and over 7000 species (Bekut et al, 2017;Trivellini et al, 2016).…”