To investigate the effects of two elicitors, methyl jasmonat (MeJA) and silver nanoparticles
(SNPs), on the production of secondary metabolite by Calendula officinalis
For the extract of the aerial part of the plant, membrane lipid peroxidation rate and 2,
2'diphenylpicrylhydrazyl (DPPH) radical scavenging activity were assessed along with total
anthocyanin, flavonoid, chlorophyll, carotenoids and saponin content. The effect of C. officinalis
extract with and without SNPs and MeJA on HeLa cell viability was also evaluated by methylthiazol
tetrazolium (MTT) assay.
The presence of SNPs and MeJA in marigold extract increased membrane lipid peroxidation
but decreased DPPH radical scavenging activity. Anthocyanin and flavonoid content also decreased in
all the treatments investigated. Exposure to SNPs decreased chlorophyll and carotenoid content in the
plant by 30 - 50 %, while MeJA increased them. In comparison with the control group, treatment with 0.4
mM SNPs and 100 μM MeJA increased saponin content in the plants by up to 177 %. Exposure of HeLa
cells to the extracts of marigold significantly reduced their viability and this reduction was more
pronounced when the plants were treated with MeJA and SNPs.
Treatment of C. officinalis
L. with SNPs and MeJA seems to be a simple and cost-effective
method of improving the medicinal properties of this plant.