Defense potential of secondary metabolites in medicinal plants under UV-B stress

Publication date: Available online 13 February 2019Source: Journal of Photochemistry and Photobiology B: BiologyAuthor(s): Swabha Takshak, S.B. AgrawalAbstractUltraviolet-B (UV-B) radiation has, for many decades now, been widely studied with respect to its consequences on plant and animal health. Though according to NASA, the ozone hole is on its way to recovery, it will still be a considerable time before UV-B levels reach pre-industrial limits. Thus, for the present, excessive UV-B reaching the Earth is a cause for concern, and UV-B related human ailments are on the rise. Plants produce various secondary metabolites as one of the defense strategies under UV-B. They provide photoprotection via their UV-B screening effects and by quenching the reactive oxygen- and nitrogen species produced...

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