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Aims The secondary metabolites of plants have been considered due to their diversity and roles in plants and human health. Grapevine is one of the plants that have secondary compounds with medicinal properties. such compounds include resveratrol which is a phenolic compound from the stilbenoid group. In order to investigate the resveratrol production under the effect of an elicitor, a CRD design with four replications using Soltani cultivar was done.
Materials & Methods. The salicylic acid (SA) was used as an elicitor with variable concentrations including 0, 10^-4, 10^-5, 10^-6 and was introduced into MS medium without hormones to examine it`s stress effects. At the molecular level, the effect of SA on the expression of stilbene-synthase gene was evaluated by semi-quantitative RT-PCR. In the biochemical experiment, the rate of resveratrol production was measured by HPLC.
Findings Stilbene-synthase expression analysis showed that SA with a concentration of 10^-4 M had a positive and incremental effect on gene expression and showed a 35.48% of increase compared to the control state, and also the concentration of 10^-5 M increased the gene expression 5.65% in relation with control state. In the biochemical experiment, increasing in production of resveratrol was observed in 10^-4 M treatment compared to the control treatment (6.1 µg) and 10^-5 M treatment (3.25 µg) did not show a significant difference with the control sample.
Conclusion SA as an elicitor and stimulant of resveratrol production could enhance the expression of stilbene-synthase gene followed by enhancing the medicinal properties of the Vitis plant.

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This study aimed to evaluate the effect of Se application under salinity conditions on the yield and physiological characteristics of garlic. The experiment was conducted using a completely randomized design with three replications. Treatments included four levels of Se (0, 4, 8, 16 mg L⁻¹) and four salinity levels (0, 30, 60, and 90 mM sodium chloride) in a factorial arrangement. Results indicated that low concentrations of Se positively influenced vegetative characteristics. Increasing Se concentration to 8 mgL^-1 enhanced growth across all studied vegetative traits. Relative water content of the leaves decreased with increasing NaCl concentration compared to the control. Se-treated plants showed increased levels of chlorophyll a, b, total chlorophyll and carotenoids compared to the control. Additionally, superoxide dismutase enzyme activity significantly increased with 8 mgL^-1 Se treatment at 30 mM sodium chloride compared to the control. Interaction analysis revealed the highest and lowest catalase activity at 8 and 4 mgL^-1 Se and 90 mM sodium chloride, respectively. Future research should explore the long-term effects of Se application on garlic under varying environmental conditions. Investigating the molecular mechanisms behind Se protective role against salinity stress could provide deeper insights. Additionally, examining the impact of Se on other economically important crops under salinity stress would be valuable.