The Effect of Ultraviolet Light on Allelochemical Production, such as Phenolic Compounds, in Helianthus annuus Foliage Leachates and the Response of Ipomoea purpurea to these Leachates

Earth & Environmental Sciences, Flora & Fauna, Biology
Shaun Lim Hsien Yang – Singapore


Helianthus annuus (sunflower) is known to inhibit the growth of plants like Ipomoea purpurea (Tall Morning Glory) via allelochemicals produced in its leaves and other parts. Allelochemicals are secondary metabolites that affect growth …

and development of neighboring organisms such as other plants, algae, bacteria or fungi, in response to various environmental stresses. This researcher explored the ultraviolet exposure of Helianthus annuus on water-soluble allelochemical production, such as phenolic compounds, in Helianthus annuus leaf leachates and their resulting impact on the growth and physiology of Ipomoea purpurea seedlings. The hypothesis, which proved true: increasing global UV levels may stimulate allelochemical production in Helianthus annuus and the leachates could be used as natural herbicides against plants susceptible to allelopathic effects.

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