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The anti-skin inflammatory activities of rose petal extracts have been described in our previous study. Because skin inflammation is closely linked to skin aging, our study investigated the effects of Rosa gallica petals on skin aging-related activities such as skin whitening and anti-wrinkle properties. Each sample was prepared via extraction using different ethanol ratios with the objective of evaluationg optimal extraction conditions for industrial application. Aqueous 50% (v/v) EtOH extract of R. gallica petal significantly suppressed tyrosinase activity, melanin production, and solar UV-induced matrix metalloproteinase-1, a hall mark of wrinkle formation. In addition, the aqueous 50% (v/v) EtOH extract showed the highest antioxidative effect and had highest flavonoid contents, consistent with the reported anti-aging effects. Overall, our findings suggest that R. gallica petals extracts exhibit anti-aging effects. Furthermore, 50% EtOH extraction, in particular, was optimal for the highest anti-aging, and anti-oxidative effects as well as to obtain the highest flavonoid content.

This article presents that deicers such as calcium chloride (CaCl2) and EFDs (Eco-Friendly Deicers) composed with organic acids affect germination of seeds buried in old-field soil. CaCl2, one of a commonly used deicer in the world, have shown an inhibitory effect on the germination of the buried seeds. Species richness, species diversity, and total biomass of the plant community after germinating were greatly decreased with increase of CaCl2 concentration. The germination of buried seeds was inhibited seriously by CaCl2, but the degree of its varied significantly with plant species. EFD1 manufactured from organic chemicals showed the higher inhibition on germination than CaCl2. However, EFD2 composed with organic acids of food waste didn’t have an inhibitory effect on the species richness after germination and rather enhanced the germination and initial growth of the seedlings. The positive effect was evaluated that EFD2 caused to supply nutrition on germination or growth of buried seeds. The deicers may change dynamically the plant community of the roadside because the response of germination and growth by deicers differ from plant species.