The effect of UV light intensity on anthocyanin content of Richea continentis leaves
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Keywords
Alpine regions, chlorophyll fluorescence
Abstract
The aim of this study was to determine the effect of UV light intensity on anthocyanin content in Richea continentis leaves. Anthocyanins play an important role in protecting plants from environmental stresses such as high UV exposure and freezing temperatures. This study was conducted because in the context of climate change it is important to understand how increased UV exposure will affect alpine plants. It was hypothesised that anthocyanin content in R. continentis leaves would increase as UV light intensity increases. Three samples of R. continentis were collected from each of four different elevations at Charlotte Pass, NSW, and UV light intensity at these sites was recorded. The leaves’ anthocyanin content was determined using thin layer chromatography and chlorophyll fluorescence (Fv/Fm) was measured as an indicator of leaf stress using a Plant Efficiency Analyser. There was a significant positive correlation between UV light intensity and anthocyanin content, and a significant negative correlation between Fv/Fm and anthocyanin content. No significant correlation was found between light intensity and Fv/Fm, suggesting that anthocyanins act to reduce UV damage in R. continentis leaves.
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