Study on antioxidant and whitening properties of the important alien invasive plants in Taiwan
Date Issued
2010
Date
2010
Author(s)
Huang, Chen-Ying
Abstract
IUCN definded invasive alien species were animals, plants or other organisms introduced by man into places out of their natural range of distribution, where they become established and disperse, generating a negative impact on the local ecosystem and species. There are many different purpose for introduction of invasive alien species in Taiwan, contains Mikania micrantha, Chromolaena odorata (L.) R. M. King & H. Rob., Leucaena leucocephala, Pennisetum purpureum Schum., Panicum maximum Jacq., Parthenium hysterophorus L., Ambrosia artemisiifolia, Ipomoea cairica (L.) Sweet, Lantana camara L. and Eichhornia crassipes (Mart.) Solms. However, there were still using physical harvesting control methods, if the invaseive plants can be utilizated using the value expected increase harvesting to reduce their impact on the local ecological environment. Report not yet available to study for its whitening properties, so we examined 10 invasive alien plants that might be useful for skin-whitening and skin health. Samples were extract with water and ethanol. The yields of these water extracts were 3.0~29.0%, and ethanol extracts were 7.8~19.0%. Antioxidant test of extracts were tested for free radical scavenging effect. The water extract of Ipomoea cairica (L.) Sweet showed good free radical scavenging effect and high phenolic contents (IC50:0.16mg/ml, DPPH radical; IC5 0 :0.15mg/ml,ABTS radical and 231.8mg of Gallic acid/g extract). And only the water extract of Ipomoea cairica (L.) Sweet showed inhibitory effects on mushroom tyrosinase activity. And the inhibition were doesdependent. In vivo test of extracts (1mg/ml) were tested for cell viability on mouse melanoma cell B16F0; 6 plant extracts exhibited low cytotoxicity. The water extract of Ipomoea cairica (L.) Sweet and Leucaena leucocephala, exhibited potent inhibitory iii effects on tyrosinase and melanin. And the inhibition were does-dependent and timedependent. The water extract of Ipomoea cairica (L.) Sweet exhibited whitening effect on B16F0 cell pellet. It was found that , the sample were crude extract, results are close to the positive control include 1mM kojic acid and 1mM ascorbic acid of the whitening effect. If we can separation of the active compound for further research. Expect better results, and thus achieve the original intended objective.
Subjects
invasive alien species
whitening
tyrosinase
Type
thesis
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